技术博客 数据库、运维与工程实践笔记

使用OpenFiler来模拟存储配置RAC中ASM共享盘及多路径（multipath）的测试

2025-11-15ASM / Linux/AIX / Oracle / RAC

第一章 本篇总览

之前发布了一篇《Oracle_lhr_RAC 12cR1安装》，但是其中的存储并没有使用多路径，而是使用了VMware自身提供的存储。所以，年前最后一件事就是把多路径学习一下，本文介绍了OpenFiler、iSCSI和多路径的配置。

本文内容：

![1756815178033-349aeac4-20da-4b0e-a8f3-a532dc66542f.jpg](http://images2015.cnblogs.com/blog/646850/201701/646850-20170123231351847-1161516637.jpg)

第二章 安装OpenFiler

OpenFile是在rPath Linux基础上开发的，它能够作为一个独立的Linux操作系统发行。Openfiler是一款非常好的存储管理操作系统，开源免费，通过web界面对存储磁盘的管理，支持现在流行的网络存储技术IP-SAN和NAS，支持iSCSI、NFS、SMB/CIFS及FTP等协议。

本次安装OpenFiler锁需要的软件如下所示：

序号

类型

内容

—

1

openfiler

openfileresa-2.99.1-x86_64-disc1.iso

注：这些软件小麦苗已上传到腾讯微云（[http://blog.itpub.net/26736162/viewspace-1624453/]()），各位朋友可以去下载。另外，小麦苗已经将安装好的虚拟机上传到了云盘，里边已集成了rlwrap软件。

2.1 安装

详细安装过程小麦苗就不一个一个截图了，网上已经有网友贴出了一步一步的过程，OpenFiler的内存设置为1G大小或再小点也无所谓，磁盘选用IDE磁盘格式，由于后续要配置多路径，所以需要安装2块网卡。安装完成后，重新启动，界面如下所示：

![1756815178130-b3ed4d37-dfb4-4b2d-913a-a75b4b1e6bf9.jpg](http://images2015.cnblogs.com/blog/646850/201701/646850-20170123231354691-519569160.jpg)

注意，方框中的内容，可以在浏览器中直接打开。可以用root用户登录进行用户的维护，若进行存储的维护则只能使用openfiler用户。openfiler是在远程使用Web界面进行管理的，小麦苗这里的管理地址是https://192.168.59.200:446，其管理的初始用户名是openfiler（小写的），密码是password，可以在登录之后，修改这个密码。

![1756815178230-cec0bc17-de5b-42fe-a726-92a242f8d38a.jpg](http://images2015.cnblogs.com/blog/646850/201701/646850-20170123231357206-2052713009.jpg)

2.2 基本配置

2.2.1 网卡配置

![1756815178325-1f734424-ed3c-48cc-873a-24bae10debe4.jpg](http://images2015.cnblogs.com/blog/646850/201701/646850-20170123231359331-866082926.jpg)

配置静态网卡地址：

[root@OFLHR ~]# more /etc/sysconfig/network-scripts/ifcfg-eth0

Advanced Micro Devices [AMD] 79c970 [PCnet32 LANCE]

DEVICE=eth0

BOOTPROTO=static

BROADCAST=192.168.59.255

HWADDR=00:0C:29:98:1A:CD

IPADDR=192.168.59.200

NETMASK=255.255.255.0

NETWORK=192.168.59.0

ONBOOT=yes

[root@OFLHR ~]# more /etc/sysconfig/network-scripts/ifcfg-eth1

DEVICE=eth1

MTU=1500

USERCTL=no

ONBOOT=yes

BOOTPROTO=static

IPADDR=192.168.2.200

NETMASK=255.255.255.0

HWADDR=00:0C:29:98:1A:D7

[root@OFLHR ~]# ip a

1: lo: <loopback,up,10000> mtu 16436 qdisc noqueue

link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
inet6 ::1/128 scope host 
   valid_lft forever preferred_lft forever

2: eth0: <broadcast,multicast,up,10000> mtu 1500 qdisc pfifo_fast qlen 1000

link/ether 00:0c:29:98:1a:cd brd ff:ff:ff:ff:ff:ff
inet 192.168.59.200/24 brd 192.168.59.255 scope global eth0
inet6 fe80::20c:29ff:fe98:1acd/64 scope link 
   valid_lft forever preferred_lft forever

3: eth1: <broadcast,multicast,up,10000> mtu 1500 qdisc pfifo_fast qlen 1000

link/ether 00:0c:29:98:1a:d7 brd ff:ff:ff:ff:ff:ff
inet 192.168.2.200/24 brd 192.168.2.255 scope global eth1
inet6 fe80::20c:29ff:fe98:1ad7/64 scope link 
   valid_lft forever preferred_lft forever

[root@OFLHR ~]#

2.2.2 添加硬盘

添加一块100G大小的IDE格式的硬盘作为存储。

![1756815178418-ddd835be-b254-4bfe-8f4a-25d4bbb61c38.jpg](http://images2015.cnblogs.com/blog/646850/201701/646850-20170123231402003-345615055.jpg)

[root@OFLHR ~]# fdisk -l

Disk /dev/sda: 10.7 GB, 10737418240 bytes

255 heads, 63 sectors/track, 1305 cylinders, total 20971520 sectors

Units = sectors of 1 * 512 = 512 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk identifier: 0x000adc2c

Device Boot Start End Blocks Id System

/dev/sda1 * 63 610469 305203+ 83 Linux

/dev/sda2 610470 17382329 8385930 83 Linux

/dev/sda3 17382330 19486844 1052257+ 82 Linux swap / Solaris

Disk /dev/sdb: 107.4 GB, 107374182400 bytes

255 heads, 63 sectors/track, 13054 cylinders, total 209715200 sectors

Units = sectors of 1 * 512 = 512 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk identifier: 0x00000000

Disk /dev/sdb doesn't contain a valid partition table

[root@OFLHR ~]#

2.3 iscsi target配置

为openfiler服务器配置了两块硬盘，其中10GB的硬盘已经用来安装openfiler操作系统，而200GB的硬盘则会用做数据存储。

2.3.1 创建逻辑卷

登录地址：[https://192.168.59.200:446]()

初始用户名和密码：openfiler/password

在独立存储设备中，LUN（Logical Unit Number）是最重要的基本单位。LUN可以被SAN中的任何主机访问，不管是透过HBA或是iSCSI。就算是软件激活的iSCSI，也可以在不同的操作系统之下，在操作系统启动之后利用软件的iSCSI initiator访问LUN。在OpenFiler之下，LUN被称为Logical Volume（LV），因此在OpenFiler下创建LUN就是创建LV。

当你安装好OpenFiler之后，接下来就是要将OpenFiler下的磁盘分享出来给虚拟机或网络上的其他主机使用了。在标准的SAN之后，这些可以在RAID层面完成，但VG的好处及弹性是RAID无法比较的，下面看看OpenFiler下的VG是如何一步一步创建的。

创建VG的步骤：

（1）进入OpenFiler的接口，并且选择要使用的实体硬盘。

（2）将要加入的实体硬盘格式化成Physical Volume格式。

（3）创建一个VG组，并且将格式化成为PV格式的实体硬盘加入。

（4）加入完毕之后，就成为一个大的VG组，被视为系统的一个大实体硬盘。

（5）在这个VG中添加逻辑分割区LUN，在OpenFiler中称为Logical Volume。

（6）指定LUN的文件格式，如iSCSI、ext3或是NFS，并且格式化。

（7）如果是iSCSI则需要再配置，如果是其他文件格式，就可以用NAS的方式分享出去而

登录后，点击Volumes标签

为openfiler服务器配置了两块硬盘，其中10GB的硬盘已经用来安装openfiler操作系统，而200GB的硬盘则会用做数据存储。

![1756815178504-9a082a52-7328-4add-a00b-701a14d7615b.jpg](http://images2015.cnblogs.com/blog/646850/201701/646850-20170123231404253-403132256.jpg)

![1756815178596-0a757dbd-ffbd-4a52-8789-351f69932520.jpg](http://images2015.cnblogs.com/blog/646850/201701/646850-20170123231406253-2076589752.jpg)

点击create new physical volumes后点击/dev/sdb

![1756815178690-74b76e19-dff0-4ff9-8312-19fc5f6c5563.jpg](http://images2015.cnblogs.com/blog/646850/201701/646850-20170123231409191-411927171.jpg)

点击页面右下角Reset，然后点击Create。分区类型为Physical volume

![1756815178783-384ca7e9-eed2-4522-8f39-806d7f577d20.jpg](http://images2015.cnblogs.com/blog/646850/201701/646850-20170123231412456-1207194035.jpg)

点击Volume Groups

![1756815178866-fdba7402-3781-4201-9ab2-515327c5b511.jpg](http://images2015.cnblogs.com/blog/646850/201701/646850-20170123231415003-1692570007.jpg)

![1756815178958-3810c090-82e3-4d9c-8d43-403da94384fb.jpg](http://images2015.cnblogs.com/blog/646850/201701/646850-20170123231417206-1877236545.jpg)

输入名称，勾选复选框，单击Add volume group

![1756815179048-bce3d4c1-e5cb-475c-84e4-1538c6119c73.jpg](http://images2015.cnblogs.com/blog/646850/201701/646850-20170123231419409-1147492729.jpg)

[root@OFLHR ~]# fdisk -l

Disk /dev/sda: 10.7 GB, 10737418240 bytes

255 heads, 63 sectors/track, 1305 cylinders, total 20971520 sectors

Units = sectors of 1 * 512 = 512 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk identifier: 0x000adc2c

Device Boot Start End Blocks Id System

/dev/sda1 * 63 610469 305203+ 83 Linux

/dev/sda2 610470 17382329 8385930 83 Linux

/dev/sda3 17382330 19486844 1052257+ 82 Linux swap / Solaris

WARNING: GPT (GUID Partition Table) detected on '/dev/sdb'! The util fdisk doesn't support GPT. Use GNU Parted.

Disk /dev/sdb: 107.4 GB, 107374182400 bytes

255 heads, 63 sectors/track, 13054 cylinders, total 209715200 sectors

Units = sectors of 1 * 512 = 512 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk identifier: 0x00000000

Device Boot Start End Blocks Id System

/dev/sdb1 1 209715199 104857599+ ee GPT

[root@OFLHR ~]# pvs

PV VG Fmt Attr PSize PFree

/dev/sdb1 vmlhr lvm2 a- 95.34g 95.34g

[root@OFLHR ~]#

点击Add Volume

![1756815179133-9c9699ae-3e08-4eb3-a335-169ee81be3a5.jpg](http://images2015.cnblogs.com/blog/646850/201701/646850-20170123231422253-1341569222.jpg)

输入内容，调整磁盘大小为10G，卷类型选择block（iSCSI，FC，etc）

![1756815179224-53da619a-7dcf-4d93-a529-1f0facedeb85.jpg](http://images2015.cnblogs.com/blog/646850/201701/646850-20170123231424628-2069594608.jpg)

![1756815179309-ef6e9820-bf04-4b55-ab41-734834470de9.jpg](http://images2015.cnblogs.com/blog/646850/201701/646850-20170123231428034-851858456.jpg)

依次共创建4个逻辑卷：

![1756815179396-ef4ed252-67ed-42d9-a11d-969aaa944021.jpg](http://images2015.cnblogs.com/blog/646850/201701/646850-20170123231430847-796820970.jpg)

[root@OFLHR ~]# vgs

VG #PV #LV #SN Attr VSize VFree

vmlhr 1 4 0 wz–n- 95.34g 55.34g

[root@OFLHR ~]# pvs

PV VG Fmt Attr PSize PFree

/dev/sdb1 vmlhr lvm2 a- 95.34g 55.34g

[root@OFLHR ~]# lvs

LV VG Attr LSize Origin Snap% Move Log Copy% Convert

lv01 vmlhr -wi-a- 10.00g

lv02 vmlhr -wi-a- 10.00g

lv03 vmlhr -wi-a- 10.00g

lv04 vmlhr -wi-a- 10.00g

[root@OFLHR ~]# fdisk -l

Disk /dev/sda: 10.7 GB, 10737418240 bytes

255 heads, 63 sectors/track, 1305 cylinders, total 20971520 sectors

Units = sectors of 1 * 512 = 512 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk identifier: 0x000adc2c

Device Boot Start End Blocks Id System

/dev/sda1 * 63 610469 305203+ 83 Linux

/dev/sda2 610470 17382329 8385930 83 Linux

/dev/sda3 17382330 19486844 1052257+ 82 Linux swap / Solaris

WARNING: GPT (GUID Partition Table) detected on '/dev/sdb'! The util fdisk doesn't support GPT. Use GNU Parted.

Disk /dev/sdb: 107.4 GB, 107374182400 bytes

255 heads, 63 sectors/track, 13054 cylinders, total 209715200 sectors

Units = sectors of 1 * 512 = 512 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk identifier: 0x00000000

Device Boot Start End Blocks Id System

/dev/sdb1 1 209715199 104857599+ ee GPT

Disk /dev/dm-0: 10.7 GB, 10737418240 bytes

255 heads, 63 sectors/track, 1305 cylinders, total 20971520 sectors

Units = sectors of 1 * 512 = 512 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk identifier: 0x00000000

Disk /dev/dm-0 doesn't contain a valid partition table

Disk /dev/dm-1: 10.7 GB, 10737418240 bytes

255 heads, 63 sectors/track, 1305 cylinders, total 20971520 sectors

Units = sectors of 1 * 512 = 512 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk identifier: 0x00000000

Disk /dev/dm-1 doesn't contain a valid partition table

Disk /dev/dm-2: 10.7 GB, 10737418240 bytes

255 heads, 63 sectors/track, 1305 cylinders, total 20971520 sectors

Units = sectors of 1 * 512 = 512 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk identifier: 0x00000000

Disk /dev/dm-2 doesn't contain a valid partition table

Disk /dev/dm-3: 10.7 GB, 10737418240 bytes

255 heads, 63 sectors/track, 1305 cylinders, total 20971520 sectors

Units = sectors of 1 * 512 = 512 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk identifier: 0x00000000

Disk /dev/dm-3 doesn't contain a valid partition table

[root@OFLHR ~]#

2.3.2 开启iSCSI Target服务

![1756815179481-11fe21b3-c0bd-407c-9817-1f55f9d8cb72.jpg](http://images2015.cnblogs.com/blog/646850/201701/646850-20170123231434987-179112242.jpg)

点击Services标签栏设置iSCSI Target 为Enable 开启服务Start。

2.3.3 LUN Mapping操作

![1756815179574-60480614-b632-419c-8da3-edcb9c0946e6.jpg](http://images2015.cnblogs.com/blog/646850/201701/646850-20170123231438581-550475518.jpg)

返回Volumes标签页，点击iSCSI Targets

![1756815179681-92eb24d7-281d-4fee-8b86-cc44f606c60c.jpg](http://images2015.cnblogs.com/blog/646850/201701/646850-20170123231441050-1593150766.jpg)

点击Add

选择LUN Mapping标签 点击Map

![1756815179772-b56b1995-6a3d-4828-a832-928a0dc0e214.jpg](http://images2015.cnblogs.com/blog/646850/201701/646850-20170123231443566-1803858846.jpg)

2.3.4 Network ACL

由于iSCSI是走IP网络，因此我们要允许网络中的计算机可以透过IP来访问。下面就是OpenFiler中IP网络和同一网段中其他主机的连接方法。

1．进入OpenFiler中的System，并且直接拉到页面的下方。

2．在Network Access Configuration的地方输入这个网络访问的名称，如VM_LHR。

3．输入主机的IP段。注意不可以输入单一主机的IP，这样会都无法访问。我们在这边输入192.168.59.0，表示从192.168.59.1一直到192.168.59.254都能访问。

4．在Netmask中选择255.255.255.0，并且在Type下拉列表框中选择Share，之后即可以单击Update按钮。

![1756815179864-3e5a7b02-72df-4759-bdf9-18b2801b6b84.jpg](http://images2015.cnblogs.com/blog/646850/201701/646850-20170123231445456-237792216.jpg)

选择完之后就更新

至此就可以在这个OpenFiler中看到被授权的网段了。

在iSCSI Targets中，点击 Network ACL 标签

![1756815179974-ab77d22c-331d-486f-8469-ee37b3693dae.jpg](http://images2015.cnblogs.com/blog/646850/201701/646850-20170123231447722-847789366.jpg)

设置Access为Allow 然后点击Update

到此存储的配置已经完成

2.3.5 /etc/initiators.deny

注释掉iqn.2006-01.com.openfiler:tsn.5e423e1e4d90 ALL：

[root@OFLHR ~]# more /etc/initiators.deny

PLEASE DO NOT MODIFY THIS CONFIGURATION FILE!

This configuration file was autogenerated

by Openfiler. Any manual changes will be overwritten

Generated at: Sat Jan 21 1:49:55 CST 2017

iqn.2006-01.com.openfiler:tsn.5e423e1e4d90 ALL

End of Openfiler configuration

[root@OFLHR ~]#

第三章 RAC中配置共享

3.1 RAC节点配置iSCSI

iSCSI（Internet Small Computer System Interface）。iSCSI技术由IBM公司研究开发，是一个供硬件设备使用的、可以在IP协议的上层运行的SCSI指令集，这种指令集合可以实现在IP网络上运行SCSI协议，使其能够在诸如高速千兆以太网上进行路由选择。iSCSI技术是一种新储存技术，该技术是将现有SCSI接口与以太网络(Ethernet)技术结合，使服务器可与使用IP网络的储存装置互相交换资料。iSCSI是一种基于 TCP/IP 的协议，用来建立和管理 IP存储设备、主机和客户机等之间的相互连接，并创建存储区域网络（SAN）。

iSCSI target：就是储存设备端，存放磁盘或RAID的设备，目前也能够将Linux主机模拟成iSCSI target了！目的在提供其他主机使用的『磁盘』；

iSCSI initiator：就是能够使用target的用户端，通常是服务器。也就是说，想要连接到iSCSI target的服务器，也必须要安装iSCSI initiator的相关功能后才能够使用iSCSI target提供的磁盘。

3.1.1 iSCSI target

[root@OFLHR ~]# service iscsi-target start

Starting iSCSI target service: [ OK ]

[root@OFLHR ~]# more /etc/ietd.conf

WARNING!!! – This configuration file generated by Openfiler. DO NOT MANUALLY EDIT. #####

Target iqn.2006-01.com.openfiler:tsn.5e423e1e4d90

    HeaderDigest None
    DataDigest None
    MaxConnections 1
    InitialR2T Yes
    ImmediateData No
    MaxRecvDataSegmentLength 131072
    MaxXmitDataSegmentLength 131072
    MaxBurstLength 262144
    FirstBurstLength 262144
    DefaultTime2Wait 2
    DefaultTime2Retain 20
    MaxOutstandingR2T 8
    DataPDUInOrder Yes
    DataSequenceInOrder Yes
    ErrorRecoveryLevel 0
    Lun 0 Path=/dev/vmlhr/lv01,Type=blockio,ScsiSN=22llvD-CacO-MOMA,ScsiId=22llvD-CacO-MOMA,IOMode=wt
    Lun 1 Path=/dev/vmlhr/lv02,Type=blockio,ScsiSN=BgLpy9-u7PH-csDC,ScsiId=BgLpy9-u7PH-csDC,IOMode=wt
    Lun 2 Path=/dev/vmlhr/lv03,Type=blockio,ScsiSN=38KsSC-REKL-yPgW,ScsiId=38KsSC-REKL-yPgW,IOMode=wt
    Lun 3 Path=/dev/vmlhr/lv04,Type=blockio,ScsiSN=aN5blo-NyMp-L4Jl,ScsiId=aN5blo-NyMp-L4Jl,IOMode=wt

[root@OFLHR ~]# ps -ef|grep iscsi

root 937 2 0 01:01 ? 00:00:00 [iscsi_eh]

root 946 1 0 01:01 ? 00:00:00 iscsid

root 947 1 0 01:01 ? 00:00:00 iscsid

root 13827 1217 0 02:43 pts/1 00:00:00 grep iscsi

[root@OFLHR ~]# cat /proc/net/iet/volume

tid:1 name:iqn.2006-01.com.openfiler:tsn.5e423e1e4d90

    lun:0 state:0 iotype:blockio iomode:wt path:/dev/vmlhr/lv01
    lun:1 state:0 iotype:blockio iomode:wt path:/dev/vmlhr/lv02
    lun:2 state:0 iotype:blockio iomode:wt path:/dev/vmlhr/lv03
    lun:3 state:0 iotype:blockio iomode:wt path:/dev/vmlhr/lv04

[root@OFLHR ~]# cat /proc/net/iet/session

tid:1 name:iqn.2006-01.com.openfiler:tsn.5e423e1e4d90

[root@OFLHR ~]#

3.1.2 iSCSI initiator

3.1.2.1 安装iSCSI initiator

RAC的2个节点分别安装iSCSI initiator。

[root@raclhr-12cR1-N1 ~]# rpm -qa|grep iscsi

iscsi-initiator-utils-6.2.0.873-10.el6.x86_64

[root@raclhr-12cR1-N1 ~]#

若未安装可使用yum install iscsi-initiator-utils*进行安装。

3.1.2.2 iscsiadm

iscsi initiator主要通过iscsiadm命令管理，我们先查看提供服务的iscsi target机器上有哪些target:

[root@raclhr-12cR1-N1 ~]# iscsiadm –mode discovery –type sendtargets –portal 192.168.59.200

[ OK ] iscsid: [ OK ]

192.168.59.200:3260,1 iqn.2006-01.com.openfiler:tsn.5e423e1e4d90

192.168.2.200:3260,1 iqn.2006-01.com.openfiler:tsn.5e423e1e4d90

[root@raclhr-12cR1-N1 ~]# ps -ef|grep iscsi

root 2619 2 0 11:32 ? 00:00:00 [iscsi_eh]

root 2651 1 0 11:32 ? 00:00:00 iscsiuio

root 2658 1 0 11:32 ? 00:00:00 iscsid

root 2659 1 0 11:32 ? 00:00:00 iscsid

root 2978 56098 0 11:33 pts/1 00:00:00 grep iscsi

[root@raclhr-12cR1-N1 ~]#

到这一步就可以看出，你服务端创建的iSCSI Target 的编号和名称。这条命令只需记住-p后面跟iSCSI服务的地址就行了，也可以是主机名，都可以！3260是服务的端口号，默认的！

然后就可以登陆某个target了，登陆成功某个target后，这个target下的硬盘也就都共享过来了：

[root@raclhr-12cR1-N1 ~]# fdisk -l | grep dev

Disk /dev/sda: 21.5 GB, 21474836480 bytes

/dev/sda1 * 1 26 204800 83 Linux

/dev/sda2 26 1332 10485760 8e Linux LVM

/dev/sda3 1332 2611 10279936 8e Linux LVM

Disk /dev/sdb: 107.4 GB, 107374182400 bytes

/dev/sdb1 1 1306 10485760 8e Linux LVM

/dev/sdb2 1306 2611 10485760 8e Linux LVM

/dev/sdb3 2611 3917 10485760 8e Linux LVM

/dev/sdb4 3917 13055 73399296 5 Extended

/dev/sdb5 3917 5222 10485760 8e Linux LVM

/dev/sdb6 5223 6528 10485760 8e Linux LVM

/dev/sdb7 6528 7834 10485760 8e Linux LVM

/dev/sdb8 7834 9139 10485760 8e Linux LVM

/dev/sdb9 9139 10445 10485760 8e Linux LVM

/dev/sdb10 10445 11750 10485760 8e Linux LVM

/dev/sdb11 11750 13055 10477568 8e Linux LVM

Disk /dev/sde: 10.7 GB, 10737418240 bytes

Disk /dev/sdc: 6442 MB, 6442450944 bytes

Disk /dev/sdd: 10.7 GB, 10737418240 bytes

Disk /dev/mapper/vg_rootlhr-Vol02: 2147 MB, 2147483648 bytes

Disk /dev/mapper/vg_rootlhr-Vol00: 10.7 GB, 10737418240 bytes

Disk /dev/mapper/vg_orasoft-lv_orasoft_u01: 21.5 GB, 21474836480 bytes

Disk /dev/mapper/vg_orasoft-lv_orasoft_soft: 21.5 GB, 21474836480 bytes

Disk /dev/mapper/vg_rootlhr-Vol01: 3221 MB, 3221225472 bytes

Disk /dev/mapper/vg_rootlhr-Vol03: 3221 MB, 3221225472 bytes

[root@raclhr-12cR1-N1 ~]# iscsiadm –mode node –targetname iqn.2006-01.com.openfiler:tsn.5e423e1e4d90 –portal 192.168.59.200:3260 –login

Logging in to [iface: default, target: iqn.2006-01.com.openfiler:tsn.5e423e1e4d90, portal: 192.168.59.200,3260] (multiple)

Logging in to [iface: default, target: iqn.2006-01.com.openfiler:tsn.5e423e1e4d90, portal: 192.168.2.200,3260] (multiple)

Login to [iface: default, target: iqn.2006-01.com.openfiler:tsn.5e423e1e4d90, portal: 192.168.59.200,3260] successful.

Login to [iface: default, target: iqn.2006-01.com.openfiler:tsn.5e423e1e4d90, portal: 192.168.2.200,3260] successful.

[root@raclhr-12cR1-N1 ~]#

[root@raclhr-12cR1-N1 ~]# fdisk -l | grep dev

Disk /dev/sda: 21.5 GB, 21474836480 bytes

/dev/sda1 * 1 26 204800 83 Linux

/dev/sda2 26 1332 10485760 8e Linux LVM

/dev/sda3 1332 2611 10279936 8e Linux LVM

Disk /dev/sdb: 107.4 GB, 107374182400 bytes

/dev/sdb1 1 1306 10485760 8e Linux LVM

/dev/sdb2 1306 2611 10485760 8e Linux LVM

/dev/sdb3 2611 3917 10485760 8e Linux LVM

/dev/sdb4 3917 13055 73399296 5 Extended

/dev/sdb5 3917 5222 10485760 8e Linux LVM

/dev/sdb6 5223 6528 10485760 8e Linux LVM

/dev/sdb7 6528 7834 10485760 8e Linux LVM

/dev/sdb8 7834 9139 10485760 8e Linux LVM

/dev/sdb9 9139 10445 10485760 8e Linux LVM

/dev/sdb10 10445 11750 10485760 8e Linux LVM

/dev/sdb11 11750 13055 10477568 8e Linux LVM

Disk /dev/sde: 10.7 GB, 10737418240 bytes

Disk /dev/sdc: 6442 MB, 6442450944 bytes

Disk /dev/sdd: 10.7 GB, 10737418240 bytes

Disk /dev/mapper/vg_rootlhr-Vol02: 2147 MB, 2147483648 bytes

Disk /dev/mapper/vg_rootlhr-Vol00: 10.7 GB, 10737418240 bytes

Disk /dev/mapper/vg_orasoft-lv_orasoft_u01: 21.5 GB, 21474836480 bytes

Disk /dev/mapper/vg_orasoft-lv_orasoft_soft: 21.5 GB, 21474836480 bytes

Disk /dev/mapper/vg_rootlhr-Vol01: 3221 MB, 3221225472 bytes

Disk /dev/mapper/vg_rootlhr-Vol03: 3221 MB, 3221225472 bytes

Disk /dev/sdf: 10.7 GB, 10737418240 bytes

Disk /dev/sdi: 10.7 GB, 10737418240 bytes

Disk /dev/sdh: 10.7 GB, 10737418240 bytes

Disk /dev/sdl: 10.7 GB, 10737418240 bytes

Disk /dev/sdj: 10.7 GB, 10737418240 bytes

Disk /dev/sdg: 10.7 GB, 10737418240 bytes

Disk /dev/sdk: 10.7 GB, 10737418240 bytes

Disk /dev/sdm: 10.7 GB, 10737418240 bytes

这里多出了8块盘，在openfiler中只map了四次，为什么这里是8块而不是4块呢？因为openfiler有2块网卡，使用两个IP登录两次iscsi target，所以这里有两块是重复的

要查看各个iscsi的信息：

iscsiadm -m session -P 3

[root@raclhr-12cR1-N1 ~]#

[root@raclhr-12cR1-N1 ~]# iscsiadm -m session -P 3

iSCSI Transport Class version 2.0-870

version 6.2.0-873.10.el6

Target: iqn.2006-01.com.openfiler:tsn.5e423e1e4d90

    Current Portal: 192.168.59.200:3260,1
    Persistent Portal: 192.168.59.200:3260,1
            **********
            Interface:
            **********
            Iface Name: default
            Iface Transport: tcp
            Iface Initiatorname: iqn.1994-05.com.redhat:61d32512355
            Iface IPaddress: 192.168.59.160
            Iface HWaddress: 
            Iface Netdev: 
            SID: 1
            iSCSI Connection State: LOGGED IN
            iSCSI Session State: LOGGED_IN
            Internal iscsid Session State: NO CHANGE
            *********
            Timeouts:
            *********
            Recovery Timeout: 120
            Target Reset Timeout: 30
            LUN Reset Timeout: 30
            Abort Timeout: 15
            *****
            CHAP:
            *****
            username: 
            password: ********
            username_in: 
            password_in: ********
            ************************
            Negotiated iSCSI params:
            ************************
            HeaderDigest: None
            DataDigest: None
            MaxRecvDataSegmentLength: 262144
            MaxXmitDataSegmentLength: 131072
            FirstBurstLength: 262144
            MaxBurstLength: 262144
            ImmediateData: No
            InitialR2T: Yes
            MaxOutstandingR2T: 1
            ************************
            Attached SCSI devices:
            ************************
            Host Number: 4  State: running
            scsi4 Channel 00 Id 0 Lun: 0
                    Attached scsi disk sdg          State: running
            scsi4 Channel 00 Id 0 Lun: 1
                    Attached scsi disk sdj          State: running
            scsi4 Channel 00 Id 0 Lun: 2
                    Attached scsi disk sdk          State: running
            scsi4 Channel 00 Id 0 Lun: 3
                    Attached scsi disk sdm          State: running
    Current Portal: 192.168.2.200:3260,1
    Persistent Portal: 192.168.2.200:3260,1
            **********
            Interface:
            **********
            Iface Name: default
            Iface Transport: tcp
            Iface Initiatorname: iqn.1994-05.com.redhat:61d32512355
            Iface IPaddress: 192.168.2.100
            Iface HWaddress: 
            Iface Netdev: 
            SID: 2
            iSCSI Connection State: LOGGED IN
            iSCSI Session State: LOGGED_IN
            Internal iscsid Session State: NO CHANGE
            *********
            Timeouts:
            *********
            Recovery Timeout: 120
            Target Reset Timeout: 30
            LUN Reset Timeout: 30
            Abort Timeout: 15
            *****
            CHAP:
            *****
            username: 
            password: ********
            username_in: 
            password_in: ********
            ************************
            Negotiated iSCSI params:
            ************************
            HeaderDigest: None
            DataDigest: None
            MaxRecvDataSegmentLength: 262144
            MaxXmitDataSegmentLength: 131072
            FirstBurstLength: 262144
            MaxBurstLength: 262144
            ImmediateData: No
            InitialR2T: Yes
            MaxOutstandingR2T: 1
            ************************
            Attached SCSI devices:
            ************************
            Host Number: 5  State: running
            scsi5 Channel 00 Id 0 Lun: 0
                    Attached scsi disk sdf          State: running
            scsi5 Channel 00 Id 0 Lun: 1
                    Attached scsi disk sdh          State: running
            scsi5 Channel 00 Id 0 Lun: 2
                    Attached scsi disk sdi          State: running
            scsi5 Channel 00 Id 0 Lun: 3
                    Attached scsi disk sdl          State: running

[root@raclhr-12cR1-N1 ~]#

登陆之后要对新磁盘进行分区，格式化，然后在挂载即可

完成这些命令后，iscsi initator会把这些信息记录到/var/lib/iscsi目录下：

/var/lib/iscsi/send_targets记录了各个target的情况，/var/lib/iscsi/nodes记录了各个target下的nodes情况。下次再启动iscsi initator时（service iscsi start)，就会自动登陆各个target上。如果想让重新手工登陆各个target，需要把/var/lib/iscsi/send_targets目录下的内容和/var/lib/iscsi/nodes下的内容全部删除掉。

3.2 多路径multipath

3.2.1 RAC的2个节点上分别安装multipath软件

1、安装多路径软件包：

[root@raclhr-12cR1-N1 ~]# mount /dev/sr0 /media/lhr/cdrom/

mount: block device /dev/sr0 is write-protected, mounting read-only

[root@raclhr-12cR1-N1 ~]# cd /media/lhr/cdrom/Packages/

[root@raclhr-12cR1-N1 Packages]# ll device-mapper-*.x86_64.rpm

-r–r–r– 104 root root 168424 Oct 30 2013 device-mapper-1.02.79-8.el6.x86_64.rpm

-r–r–r– 104 root root 118316 Oct 30 2013 device-mapper-event-1.02.79-8.el6.x86_64.rpm

-r–r–r– 104 root root 112892 Oct 30 2013 device-mapper-event-libs-1.02.79-8.el6.x86_64.rpm

-r–r–r– 104 root root 199924 Oct 30 2013 device-mapper-libs-1.02.79-8.el6.x86_64.rpm

-r–r–r– 95 root root 118892 Oct 25 2013 device-mapper-multipath-0.4.9-72.el6.x86_64.rpm

-r–r–r– 95 root root 184760 Oct 25 2013 device-mapper-multipath-libs-0.4.9-72.el6.x86_64.rpm

-r–r–r– 96 root root 2444388 Oct 30 2013 device-mapper-persistent-data-0.2.8-2.el6.x86_64.rpm

[root@raclhr-12cR1-N1 Packages]# ll iscsi*

-r–r–r– 101 root root 702300 Oct 29 2013 iscsi-initiator-utils-6.2.0.873-10.el6.x86_64.rpm

[root@raclhr-12cR1-N1 Packages]# rpm -qa|grep device-mapper

device-mapper-persistent-data-0.2.8-2.el6.x86_64

device-mapper-1.02.79-8.el6.x86_64

device-mapper-event-libs-1.02.79-8.el6.x86_64

device-mapper-event-1.02.79-8.el6.x86_64

device-mapper-libs-1.02.79-8.el6.x86_64

[root@raclhr-12cR1-N1 Packages]# rpm -ivh device-mapper-1.02.79-8.el6.x86_64.rpm

warning: device-mapper-1.02.79-8.el6.x86_64.rpm: Header V3 RSA/SHA256 Signature, key ID fd431d51: NOKEY

Preparing… ########################################### [100%]

    package device-mapper-1.02.79-8.el6.x86_64 is already installed

[root@raclhr-12cR1-N1 Packages]# rpm -ivh device-mapper-event-1.02.79-8.el6.x86_64.rpm

warning: device-mapper-event-1.02.79-8.el6.x86_64.rpm: Header V3 RSA/SHA256 Signature, key ID fd431d51: NOKEY

Preparing… ########################################### [100%]

    package device-mapper-event-1.02.79-8.el6.x86_64 is already installed

[root@raclhr-12cR1-N1 Packages]# rpm -ivh device-mapper-multipath-0.4.9-72.el6.x86_64.rpm

warning: device-mapper-multipath-0.4.9-72.el6.x86_64.rpm: Header V3 RSA/SHA256 Signature, key ID fd431d51: NOKEY

error: Failed dependencies:

    device-mapper-multipath-libs = 0.4.9-72.el6 is needed by device-mapper-multipath-0.4.9-72.el6.x86_64
    libmpathpersist.so.0()(64bit) is needed by device-mapper-multipath-0.4.9-72.el6.x86_64
    libmultipath.so()(64bit) is needed by device-mapper-multipath-0.4.9-72.el6.x86_64

[root@raclhr-12cR1-N1 Packages]# rpm -ivh device-mapper-multipath-libs-0.4.9-72.el6.x86_64.rpm

warning: device-mapper-multipath-libs-0.4.9-72.el6.x86_64.rpm: Header V3 RSA/SHA256 Signature, key ID fd431d51: NOKEY

Preparing… ########################################### [100%]

1:device-mapper-multipath########################################### [100%]

[root@raclhr-12cR1-N1 Packages]# rpm -ivh device-mapper-multipath-0.4.9-72.el6.x86_64.rpm

warning: device-mapper-multipath-0.4.9-72.el6.x86_64.rpm: Header V3 RSA/SHA256 Signature, key ID fd431d51: NOKEY

Preparing… ########################################### [100%]

1:device-mapper-multipath########################################### [100%]

[root@raclhr-12cR1-N1 Packages]# rpm -qa|grep device-mapper

device-mapper-multipath-0.4.9-72.el6.x86_64

device-mapper-persistent-data-0.2.8-2.el6.x86_64

device-mapper-1.02.79-8.el6.x86_64

device-mapper-event-libs-1.02.79-8.el6.x86_64

device-mapper-event-1.02.79-8.el6.x86_64

device-mapper-multipath-libs-0.4.9-72.el6.x86_64

device-mapper-libs-1.02.79-8.el6.x86_64

[root@raclhr-12cR1-N2 Packages]#

rpm -ivh device-mapper-multipath-libs-0.4.9-72.el6.x86_64.rpm

rpm -ivh device-mapper-multipath-0.4.9-72.el6.x86_64.rpm

3.2.2 启动multipath

将多路径软件添加至内核模块中

modprobe dm-multipath

modprobe dm-round-robin

检查内核添加情况

[root@raclhr-12cR1-N1 Packages]# lsmod |grep multipath

dm_multipath 17724 1 dm_round_robin

dm_mod 84209 16 dm_multipath,dm_mirror,dm_log

[root@raclhr-12cR1-N1 Packages]#

将多路径软件multipath设置为开机自启动

[root@raclhr-12cR1-N1 Packages]# chkconfig –level 2345 multipathd on

[root@raclhr-12cR1-N1 Packages]#

[root@raclhr-12cR1-N1 Packages]# chkconfig –list|grep multipathd

multipathd 0:off 1:off 2:on 3:on 4:on 5:on 6:off

[root@raclhr-12cR1-N1 Packages]#

启动multipath服务

[root@raclhr-12cR1-N1 Packages]# service multipathd restart

ux_socket_connect: No such file or directory

Stopping multipathd daemon: [FAILED]

Starting multipathd daemon: [ OK ]

[root@raclhr-12cR1-N1 Packages]#

3.2.3 配置多路径软件/etc/multipath.conf

1、配置multipath软件，编辑/etc/multipath.conf

注意:默认情况下，/etc/multipath.conf是不存在的，需要用如下命令生成multipath.conf文件:

/sbin/mpathconf –enable –find_multipaths y –with_module y –with_chkconfig y

[root@raclhr-12cR1-N1 ~]# multipath -ll

Jan 23 12:52:54 | /etc/multipath.conf does not exist, blacklisting all devices.

Jan 23 12:52:54 | A sample multipath.conf file is located at

Jan 23 12:52:54 | /usr/share/doc/device-mapper-multipath-0.4.9/multipath.conf

Jan 23 12:52:54 | You can run /sbin/mpathconf to create or modify /etc/multipath.conf

[root@raclhr-12cR1-N1 ~]# multipath -ll

Jan 23 12:53:49 | /etc/multipath.conf does not exist, blacklisting all devices.

Jan 23 12:53:49 | A sample multipath.conf file is located at

Jan 23 12:53:49 | /usr/share/doc/device-mapper-multipath-0.4.9/multipath.conf

Jan 23 12:53:49 | You can run /sbin/mpathconf to create or modify /etc/multipath.conf

[root@raclhr-12cR1-N1 ~]# /sbin/mpathconf –enable –find_multipaths y –with_module y –with_chkconfig y

[root@raclhr-12cR1-N1 ~]#

[root@raclhr-12cR1-N1 ~]# ll /etc/multipath.conf

-rw——- 1 root root 2775 Jan 23 12:55 /etc/multipath.conf

[root@raclhr-12cR1-N1 ~]#

2、查看并获取存储分配给服务器的逻辑盘lun的wwid信息

[root@raclhr-12cR1-N1 multipath]# multipath -v0

[root@raclhr-12cR1-N1 multipath]# more /etc/multipath/wwids

Multipath wwids, Version : 1.0

NOTE: This file is automatically maintained by multipath and multipathd.

You should not need to edit this file in normal circumstances.

#

Valid WWIDs:

/14f504e46494c455232326c6c76442d4361634f2d4d4f4d41/

/14f504e46494c455242674c7079392d753750482d63734443/

/14f504e46494c455233384b7353432d52454b4c2d79506757/

/14f504e46494c4552614e35626c6f2d4e794d702d4c344a6c/

[root@raclhr-12cR1-N1 multipath]#

将文件/etc/multipath/wwids和/etc/multipath/bindings的内容覆盖节点2：

[root@raclhr-12cR1-N2 ~]# multipath -v0

[root@raclhr-12cR1-N2 ~]# more /etc/multipath/wwids

Multipath wwids, Version : 1.0

NOTE: This file is automatically maintained by multipath and multipathd.

You should not need to edit this file in normal circumstances.

#

Valid WWIDs:

/14f504e46494c455232326c6c76442d4361634f2d4d4f4d41/

/14f504e46494c455242674c7079392d753750482d63734443/

/14f504e46494c455233384b7353432d52454b4c2d79506757/

/14f504e46494c4552614e35626c6f2d4e794d702d4c344a6c/

[root@raclhr-12cR1-N1 ~]# more /etc/multipath/bindings

Multipath bindings, Version : 1.0

NOTE: this file is automatically maintained by the multipath program.

You should not need to edit this file in normal circumstances.

#

Format:

alias wwid

#

mpatha 14f504e46494c455232326c6c76442d4361634f2d4d4f4d41

mpathb 14f504e46494c455242674c7079392d753750482d63734443

mpathc 14f504e46494c455233384b7353432d52454b4c2d79506757

mpathd 14f504e46494c4552614e35626c6f2d4e794d702d4c344a6c

[root@raclhr-12cR1-N1 ~]#

[root@raclhr-12cR1-N2 ~]#

[root@raclhr-12cR1-N1 multipath]# multipath -ll

mpathd (14f504e46494c4552614e35626c6f2d4e794d702d4c344a6c) dm-9 OPNFILER,VIRTUAL-DISK

size=10G features='0' hwhandler='0' wp=rw

-+- policy='round-robin 0' prio=1 status=active

`- 5:0:0:3 sdk 8:160 active ready running

`-+- policy='round-robin 0' prio=1 status=enabled

`- 4:0:0:3 sdm 8:192 active ready running

mpathc (14f504e46494c455233384b7353432d52454b4c2d79506757) dm-8 OPNFILER,VIRTUAL-DISK

size=10G features='0' hwhandler='0' wp=rw

-+- policy='round-robin 0' prio=1 status=active

`- 5:0:0:2 sdj 8:144 active ready running

`-+- policy='round-robin 0' prio=1 status=enabled

`- 4:0:0:2 sdl 8:176 active ready running

mpathb (14f504e46494c455242674c7079392d753750482d63734443) dm-7 OPNFILER,VIRTUAL-DISK

size=10G features='0' hwhandler='0' wp=rw

-+- policy='round-robin 0' prio=1 status=active

`- 4:0:0:1 sdh 8:112 active ready running

`-+- policy='round-robin 0' prio=1 status=enabled

`- 5:0:0:1 sdi 8:128 active ready running

mpatha (14f504e46494c455232326c6c76442d4361634f2d4d4f4d41) dm-6 OPNFILER,VIRTUAL-DISK

size=10G features='0' hwhandler='0' wp=rw

-+- policy='round-robin 0' prio=1 status=active

`- 4:0:0:0 sdf 8:80 active ready running

`-+- policy='round-robin 0' prio=1 status=enabled

`- 5:0:0:0 sdg 8:96 active ready running

[root@raclhr-12cR1-N1 multipath]# fdisk -l | grep dev

Disk /dev/sda: 21.5 GB, 21474836480 bytes

/dev/sda1 * 1 26 204800 83 Linux

/dev/sda2 26 1332 10485760 8e Linux LVM

/dev/sda3 1332 2611 10279936 8e Linux LVM

Disk /dev/sdb: 107.4 GB, 107374182400 bytes

/dev/sdb1 1 1306 10485760 8e Linux LVM

/dev/sdb2 1306 2611 10485760 8e Linux LVM

/dev/sdb3 2611 3917 10485760 8e Linux LVM

/dev/sdb4 3917 13055 73399296 5 Extended

/dev/sdb5 3917 5222 10485760 8e Linux LVM

/dev/sdb6 5223 6528 10485760 8e Linux LVM

/dev/sdb7 6528 7834 10485760 8e Linux LVM

/dev/sdb8 7834 9139 10485760 8e Linux LVM

/dev/sdb9 9139 10445 10485760 8e Linux LVM

/dev/sdb10 10445 11750 10485760 8e Linux LVM

/dev/sdb11 11750 13055 10477568 8e Linux LVM

Disk /dev/sdc: 6442 MB, 6442450944 bytes

Disk /dev/sdd: 10.7 GB, 10737418240 bytes

Disk /dev/sde: 10.7 GB, 10737418240 bytes

Disk /dev/mapper/vg_rootlhr-Vol02: 2147 MB, 2147483648 bytes

Disk /dev/mapper/vg_rootlhr-Vol00: 10.7 GB, 10737418240 bytes

Disk /dev/mapper/vg_orasoft-lv_orasoft_u01: 21.5 GB, 21474836480 bytes

Disk /dev/mapper/vg_orasoft-lv_orasoft_soft: 21.5 GB, 21474836480 bytes

Disk /dev/mapper/vg_rootlhr-Vol01: 3221 MB, 3221225472 bytes

Disk /dev/mapper/vg_rootlhr-Vol03: 3221 MB, 3221225472 bytes

Disk /dev/sdf: 10.7 GB, 10737418240 bytes

Disk /dev/sdg: 10.7 GB, 10737418240 bytes

Disk /dev/sdh: 10.7 GB, 10737418240 bytes

Disk /dev/sdi: 10.7 GB, 10737418240 bytes

Disk /dev/sdj: 10.7 GB, 10737418240 bytes

Disk /dev/sdk: 10.7 GB, 10737418240 bytes

Disk /dev/sdl: 10.7 GB, 10737418240 bytes

Disk /dev/sdm: 10.7 GB, 10737418240 bytes

Disk /dev/mapper/mpatha: 10.7 GB, 10737418240 bytes

Disk /dev/mapper/mpathb: 10.7 GB, 10737418240 bytes

Disk /dev/mapper/mpathc: 10.7 GB, 10737418240 bytes

Disk /dev/mapper/mpathd: 10.7 GB, 10737418240 bytes

[root@raclhr-12cR1-N1 multipath]#

3.2.4 编辑/etc/multipath.conf

for i in f g h i j k l m ;

do

echo "KERNEL=="sd*", BUS=="scsi", PROGRAM=="/sbin/scsi_id –whitelisted –device=/dev/name",RESULT=="‘scsiid−−whitelisted−−device=/dev/sdname",RESULT=="‘scsiid−−whitelisted−−device=/dev/sdi`",NAME="asm-disk$i",OWNER="grid",GROUP="asmadmin",MODE="0660""

done

[root@raclhr-12cR1-N1 multipath]# for i in f g h i j k l m ;

do

echo "KERNEL=="sd*", BUS=="scsi", PROGRAM=="/sbin/scsi_id –whitelisted –device=/dev/name",RESULT=="‘scsiid−−whitelisted−−device=/dev/sdname",RESULT=="‘scsiid−−whitelisted−−device=/dev/sdi`",NAME="asm-disk$i",OWNER="grid",GROUP="asmadmin",MODE="0660""

done

KERNEL=="sd*", BUS=="scsi", PROGRAM=="/sbin/scsi_id –whitelisted –device=/dev/$name",RESULT=="14f504e46494c455232326c6c76442d4361634f2d4d4f4d41",NAME="asm-diskf",OWNER="grid",GROUP="asmadmin",MODE="0660"

KERNEL=="sd*", BUS=="scsi", PROGRAM=="/sbin/scsi_id –whitelisted –device=/dev/$name",RESULT=="14f504e46494c455232326c6c76442d4361634f2d4d4f4d41",NAME="asm-diskg",OWNER="grid",GROUP="asmadmin",MODE="0660"

KERNEL=="sd*", BUS=="scsi", PROGRAM=="/sbin/scsi_id –whitelisted –device=/dev/$name",RESULT=="14f504e46494c455242674c7079392d753750482d63734443",NAME="asm-diskh",OWNER="grid",GROUP="asmadmin",MODE="0660"

KERNEL=="sd*", BUS=="scsi", PROGRAM=="/sbin/scsi_id –whitelisted –device=/dev/$name",RESULT=="14f504e46494c455242674c7079392d753750482d63734443",NAME="asm-diski",OWNER="grid",GROUP="asmadmin",MODE="0660"

KERNEL=="sd*", BUS=="scsi", PROGRAM=="/sbin/scsi_id –whitelisted –device=/dev/$name",RESULT=="14f504e46494c455233384b7353432d52454b4c2d79506757",NAME="asm-diskj",OWNER="grid",GROUP="asmadmin",MODE="0660"

KERNEL=="sd*", BUS=="scsi", PROGRAM=="/sbin/scsi_id –whitelisted –device=/dev/$name",RESULT=="14f504e46494c4552614e35626c6f2d4e794d702d4c344a6c",NAME="asm-diskk",OWNER="grid",GROUP="asmadmin",MODE="0660"

KERNEL=="sd*", BUS=="scsi", PROGRAM=="/sbin/scsi_id –whitelisted –device=/dev/$name",RESULT=="14f504e46494c455233384b7353432d52454b4c2d79506757",NAME="asm-diskl",OWNER="grid",GROUP="asmadmin",MODE="0660"

KERNEL=="sd*", BUS=="scsi", PROGRAM=="/sbin/scsi_id –whitelisted –device=/dev/$name",RESULT=="14f504e46494c4552614e35626c6f2d4e794d702d4c344a6c",NAME="asm-diskm",OWNER="grid",GROUP="asmadmin",MODE="0660"

[root@raclhr-12cR1-N1 multipath]#

[root@raclhr-12cR1-N1 multipath]# more /etc/multipath.conf

defaults {

    find_multipaths yes
    user_friendly_names yes

}

blacklist {

  wwid 3600508b1001c5ae72efe1fea025cd2e5
  devnode "^hd[a-z]"
  devnode "^sd[a-e]"
  devnode "^sda"

}

multipaths {

   multipath {
           wwid                    14f504e46494c455232326c6c76442d4361634f2d4d4f4d41
           alias                   VMLHRStorage000
           path_grouping_policy    multibus
           path_selector           "round-robin 0"
           failback                manual
           rr_weight               priorities
           no_path_retry           5
  }
   multipath {
           wwid                    14f504e46494c455242674c7079392d753750482d63734443
           alias                   VMLHRStorage001
           path_grouping_policy    multibus
           path_selector           "round-robin 0"
           failback                manual
           rr_weight               priorities
           no_path_retry           5
   }
   multipath {
           wwid                    14f504e46494c455233384b7353432d52454b4c2d79506757
           alias                   VMLHRStorage002
           path_grouping_policy    multibus
           path_selector           "round-robin 0"
           failback                manual
           rr_weight               priorities
           no_path_retry           5
   }
   multipath {
           wwid                    14f504e46494c4552614e35626c6f2d4e794d702d4c344a6c
           alias                   VMLHRStorage003
           path_grouping_policy    multibus
           path_selector           "round-robin 0"
           failback                manual
           rr_weight               priorities
           no_path_retry           5
   }

}

devices {

   device {
           vendor                  "VMWARE"
           product                 "VIRTUAL-DISK"
           path_grouping_policy    multibus
           getuid_callout          "/lib/udev/scsi_id --whitelisted --device=/dev/%n"
           path_checker            readsector0
           path_selector           "round-robin 0"
           hardware_handler        "0"
           failback                15
           rr_weight               priorities
           no_path_retry           queue
   }

}

[root@raclhr-12cR1-N1 multipath]#

启动multipath配置

[root@raclhr-12cR1-N1 ~]# service multipathd restart

ok

Stopping multipathd daemon: [ OK ]

Starting multipathd daemon: [ OK ]

[root@raclhr-12cR1-N1 ~]# multipath -ll

VMLHRStorage003 (14f504e46494c4552614e35626c6f2d4e794d702d4c344a6c) dm-9 OPNFILER,VIRTUAL-DISK

size=10G features='1 queue_if_no_path' hwhandler='0' wp=rw

-+- policy='round-robin 0' prio=1 status=active

`- 5:0:0:3 sdk 8:160 active ready running

`-+- policy='round-robin 0' prio=1 status=enabled

`- 4:0:0:3 sdm 8:192 active ready running

VMLHRStorage002 (14f504e46494c455233384b7353432d52454b4c2d79506757) dm-8 OPNFILER,VIRTUAL-DISK

size=10G features='1 queue_if_no_path' hwhandler='0' wp=rw

-+- policy='round-robin 0' prio=1 status=active

`- 5:0:0:2 sdj 8:144 active ready running

`-+- policy='round-robin 0' prio=1 status=enabled

`- 4:0:0:2 sdl 8:176 active ready running

VMLHRStorage001 (14f504e46494c455242674c7079392d753750482d63734443) dm-7 OPNFILER,VIRTUAL-DISK

size=10G features='1 queue_if_no_path' hwhandler='0' wp=rw

-+- policy='round-robin 0' prio=1 status=active

`- 4:0:0:1 sdh 8:112 active ready running

`-+- policy='round-robin 0' prio=1 status=enabled

`- 5:0:0:1 sdi 8:128 active ready running

VMLHRStorage000 (14f504e46494c455232326c6c76442d4361634f2d4d4f4d41) dm-6 OPNFILER,VIRTUAL-DISK

size=10G features='1 queue_if_no_path' hwhandler='0' wp=rw

-+- policy='round-robin 0' prio=1 status=active

`- 4:0:0:0 sdf 8:80 active ready running

`-+- policy='round-robin 0' prio=1 status=enabled

`- 5:0:0:0 sdg 8:96 active ready running

[root@raclhr-12cR1-N1 ~]#

[root@raclhr-12cR1-N1 ~]# multipath -ll|grep LHR

VMLHRStorage003 (14f504e46494c4552614e35626c6f2d4e794d702d4c344a6c) dm-9 OPNFILER,VIRTUAL-DISK

VMLHRStorage002 (14f504e46494c455233384b7353432d52454b4c2d79506757) dm-8 OPNFILER,VIRTUAL-DISK

VMLHRStorage001 (14f504e46494c455242674c7079392d753750482d63734443) dm-7 OPNFILER,VIRTUAL-DISK

VMLHRStorage000 (14f504e46494c455232326c6c76442d4361634f2d4d4f4d41) dm-6 OPNFILER,VIRTUAL-DISK

[root@raclhr-12cR1-N1 ~]#

启用multipath配置后,会在/dev/mapper下生成多路径逻辑盘

[root@raclhr-12cR1-N1 ~]# cd /dev/mapper

[root@raclhr-12cR1-N1 mapper]# ll

total 0

crw-rw—- 1 root root 10, 58 Jan 23 12:49 control

lrwxrwxrwx 1 root root 7 Jan 23 12:49 vg_orasoft-lv_orasoft_soft -> ../dm-3

lrwxrwxrwx 1 root root 7 Jan 23 12:49 vg_orasoft-lv_orasoft_u01 -> ../dm-2

lrwxrwxrwx 1 root root 7 Jan 23 12:50 vg_rootlhr-Vol00 -> ../dm-1

lrwxrwxrwx 1 root root 7 Jan 23 12:50 vg_rootlhr-Vol01 -> ../dm-4

lrwxrwxrwx 1 root root 7 Jan 23 12:49 vg_rootlhr-Vol02 -> ../dm-0

lrwxrwxrwx 1 root root 7 Jan 23 12:50 vg_rootlhr-Vol03 -> ../dm-5

lrwxrwxrwx 1 root root 7 Jan 23 13:55 VMLHRStorage000 -> ../dm-6

lrwxrwxrwx 1 root root 7 Jan 23 13:55 VMLHRStorage001 -> ../dm-7

lrwxrwxrwx 1 root root 7 Jan 23 13:55 VMLHRStorage002 -> ../dm-8

lrwxrwxrwx 1 root root 7 Jan 23 13:55 VMLHRStorage003 -> ../dm-9

[root@raclhr-12cR1-N1 mapper]#

至此，多路径multipath配置完成。

3.2.5 配置multipath设备的权限

在6.2之前配置multipath设备的权限只需要在设备配置里增加uid,gid,mode就可以

uid 1100 #uid

gid 1020 #gid

如：

    multipath {
            wwid                    360050763008101d4e00000000000000a
            alias                   DATA03
            uid                     501                                               #uid
            gid                     501                                               #gid

}

在6.2之后配置multipath配置文件里去掉uid,gid,mode这三个参数，需要使用udev使用,示例文件在/usr/share/doc/device-mapper-version中有一个模板文件,名为12-dm-permissions.rules,您可以使用它并将其放在 /etc/udev/rules.d 目录中使其生效。

[root@raclhr-12cR1-N1 rules.d]# ll /usr/share/doc/device-mapper-1.02.79/12-dm-permissions.rules

-rw-r–r–. 1 root root 3186 Aug 13 2013 /usr/share/doc/device-mapper-1.02.79/12-dm-permissions.rules

[root@raclhr-12cR1-N1 rules.d]#

[root@raclhr-12cR1-N1 rules.d]# ll

total 24

-rw-r–r– 1 root root 77 Jan 23 18:06 12-dm-permissions.rules

-rw-r–r– 1 root root 190 Jan 23 15:40 55-usm.rules

-rw-r–r– 1 root root 549 Jan 23 15:17 70-persistent-cd.rules

-rw-r–r– 1 root root 585 Jan 23 15:09 70-persistent-net.rules

-rw-r–r– 1 root root 633 Jan 23 15:46 99-oracle-asmdevices.rules

-rw-r–r– 1 root root 916 Jan 23 15:16 99-oracleasm.rules

[root@raclhr-12cR1-N1 rules.d]# more /etc/udev/rules.d/12-dm-permissions.rules

ENV{DM_NAME}=="VMLHRStorage*", OWNER:="grid", GROUP:="asmadmin", MODE:="660"

[root@raclhr-12cR1-N1 rules.d]#

将文件/etc/udev/rules.d/12-dm-permissions.rules复制到节点2上。

3.2.6 配置udev规则

脚本如下所示：

for i in f g h i j k l m ;

do

echo "KERNEL=="dm-*", BUS=="block", PROGRAM=="/sbin/scsi_id –whitelisted –replace-whitespace –device=/dev/name",RESULT=="‘scsiid−−whitelisted−−replace−whitespace−−device=/dev/sdname",RESULT=="‘scsiid−−whitelisted−−replace−whitespace−−device=/dev/sdi`",NAME="asm-disk$i",OWNER="grid",GROUP="asmadmin",MODE="0660"" >> /etc/udev/rules.d/99-oracleasm.rules

done

由于多路径的设置WWID有重复，所以应该去掉文件/etc/udev/rules.d/99-oracleasm.rules中的重复的行。

在节点1执行以下操作：

[root@raclhr-12cR1-N1 rules.d]# for i in f g h i j k l m ;

do

echo "KERNEL=="dm-*", BUS=="block", PROGRAM=="/sbin/scsi_id –whitelisted –replace-whitespace –device=/dev/name",RESULT=="‘scsiid−−whitelisted−−replace−whitespace−−device=/dev/sdname",RESULT=="‘scsiid−−whitelisted−−replace−whitespace−−device=/dev/sdi`",NAME="asm-disk$i",OWNER="grid",GROUP="asmadmin",MODE="0660"" >> /etc/udev/rules.d/99-oracleasm.rules

done

打开文件/etc/udev/rules.d/99-oracleasm.rules，去掉WWID重复的行只保留一行即可。

[root@raclhr-12cR1-N1 ~]# cat /etc/udev/rules.d/99-oracleasm.rules

KERNEL=="dm-*", BUS=="block", PROGRAM=="/sbin/scsi_id –whitelisted –replace-whitespace –device=/dev/$name",RESULT=="14f504e46494c455232326c6c76442d4361634f2d4d4f4d41",NAME="asm-diskf",OWNER="grid",GROUP="asmadmin",MODE="0660"

KERNEL=="dm-*", BUS=="block", PROGRAM=="/sbin/scsi_id –whitelisted –replace-whitespace –device=/dev/$name",RESULT=="14f504e46494c455242674c7079392d753750482d63734443",NAME="asm-diskh",OWNER="grid",GROUP="asmadmin",MODE="0660"

KERNEL=="dm-*", BUS=="block", PROGRAM=="/sbin/scsi_id –whitelisted –replace-whitespace –device=/dev/$name",RESULT=="14f504e46494c455233384b7353432d52454b4c2d79506757",NAME="asm-diskj",OWNER="grid",GROUP="asmadmin",MODE="0660"

KERNEL=="dm-*", BUS=="block", PROGRAM=="/sbin/scsi_id –whitelisted –replace-whitespace –device=/dev/$name",RESULT=="14f504e46494c4552614e35626c6f2d4e794d702d4c344a6c",NAME="asm-diskk",OWNER="grid",GROUP="asmadmin",MODE="0660"

[root@raclhr-12cR1-N1 ~]#

将文件/etc/udev/rules.d/99-oracleasm.rules的内容拷贝到节点2，然后重启udev。

[root@raclhr-12cR1-N1 ~]# start_udev

Starting udev: [ OK ]

[root@raclhr-12cR1-N1 ~]#

[root@raclhr-12cR1-N1 ~]# ll /dev/asm-*

brw-rw—- 1 grid asmadmin 8, 32 Jan 23 15:50 /dev/asm-diskc

brw-rw—- 1 grid asmadmin 8, 48 Jan 23 15:48 /dev/asm-diskd

brw-rw—- 1 grid asmadmin 8, 64 Jan 23 15:48 /dev/asm-diske

brw-rw—- 1 grid asmadmin 253, 7 Jan 23 15:46 /dev/asm-diskf

brw-rw—- 1 grid asmadmin 253, 9 Jan 23 15:46 /dev/asm-diskh

brw-rw—- 1 grid asmadmin 253, 6 Jan 23 15:46 /dev/asm-diskj

brw-rw—- 1 grid asmadmin 253, 8 Jan 23 15:46 /dev/asm-diskk

[root@raclhr-12cR1-N1 ~]#

[grid@raclhr-12cR1-N1 ~]ORACLE_HOME/bin/kfod disks=all s=true ds=true

Disk Size Header Path Disk Group User Group

================================================================================

1: 6144 Mb MEMBER /dev/asm-diskc OCR grid asmadmin

2: 10240 Mb MEMBER /dev/asm-diskd DATA grid asmadmin

3: 10240 Mb MEMBER /dev/asm-diske FRA grid asmadmin

4: 10240 Mb CANDIDATE /dev/asm-diskf # grid asmadmin

5: 10240 Mb CANDIDATE /dev/asm-diskh # grid asmadmin

6: 10240 Mb CANDIDATE /dev/asm-diskj # grid asmadmin

7: 10240 Mb CANDIDATE /dev/asm-diskk # grid asmadmin

ORACLE_SID ORACLE_HOME

================================================================================

 +ASM2 /u01/app/12.1.0/grid                                                            
 +ASM1 /u01/app/12.1.0/grid

[grid@raclhr-12cR1-N1 ~]$ asmcmd

ASMCMD> lsdg

State Type Rebal Sector Block AU Total_MB Free_MB Req_mir_free_MB Usable_file_MB Offline_disks Voting_files Name

MOUNTED EXTERN N 512 4096 1048576 10240 6487 0 6487 0 N DATA/

MOUNTED EXTERN N 512 4096 1048576 10240 10144 0 10144 0 N FRA/

MOUNTED EXTERN N 512 4096 1048576 6144 1672 0 1672 0 Y OCR/

ASMCMD> lsdsk

Path

/dev/asm-diskc

/dev/asm-diskd

/dev/asm-diske

ASMCMD> lsdsk –candidate -p

Group_Num Disk_Num Incarn Mount_Stat Header_Stat Mode_Stat State Path

    0         1           0  CLOSED      CANDIDATE    ONLINE     NORMAL  /dev/asm-diskf
    0         3           0  CLOSED      CANDIDATE    ONLINE     NORMAL  /dev/asm-diskh
    0         2           0  CLOSED      CANDIDATE    ONLINE     NORMAL  /dev/asm-diskj
    0         0           0  CLOSED      CANDIDATE    ONLINE     NORMAL  /dev/asm-diskk

ASMCMD>

3.3 利用新磁盘创建磁盘组

CREATE DISKGROUP FRA external redundancy DISK '/dev/asm-diskf','/dev/asm-diskh' ATTRIBUTE 'compatible.rdbms' = '12.1', 'compatible.asm' = '12.1';

SQL> select path from v$asm_disk;

PATH

/dev/asm-diskk

/dev/asm-diskf

/dev/asm-diskj

/dev/asm-diskh

/dev/asm-diske

/dev/asm-diskd

/dev/asm-diskc

7 rows selected.

SQL> CREATE DISKGROUP TESTMUL external redundancy DISK '/dev/asm-diskf','/dev/asm-diskh' ATTRIBUTE 'compatible.rdbms' = '12.1', 'compatible.asm' = '12.1';

Diskgroup created.

SQL>

ASMCMD> lsdg

State Type Rebal Sector Block AU Total_MB Free_MB Req_mir_free_MB Usable_file_MB Offline_disks Voting_files Name

MOUNTED EXTERN N 512 4096 1048576 10240 6487 0 6487 0 N DATA/

MOUNTED EXTERN N 512 4096 1048576 10240 10144 0 10144 0 N FRA/

MOUNTED EXTERN N 512 4096 1048576 6144 1672 0 1672 0 Y OCR/

MOUNTED EXTERN N 512 4096 1048576 20480 20381 0 20381 0 N TESTMUL/

ASMCMD>

[root@raclhr-12cR1-N1 ~]# crsctl stat res -t | grep -2 TESTMUL

           ONLINE  ONLINE       raclhr-12cr1-n1          STABLE
           ONLINE  ONLINE       raclhr-12cr1-n2          STABLE

ora.TESTMUL.dg

           ONLINE  ONLINE       raclhr-12cr1-n1          STABLE
           ONLINE  ONLINE       raclhr-12cr1-n2          STABLE

[root@raclhr-12cR1-N1 ~]#

3.3.1 测试磁盘组

[oracle@raclhr-12cR1-N1 ~]$ sqlplus / as sysdba

SQL*Plus: Release 12.1.0.2.0 Production on Mon Jan 23 16:17:28 2017

Copyright (c) 1982, 2014, Oracle. All rights reserved.

Connected to:

Oracle Database 12c Enterprise Edition Release 12.1.0.2.0 – 64bit Production

With the Partitioning, Real Application Clusters, Automatic Storage Management, OLAP,

Advanced Analytics and Real Application Testing options

SQL> create tablespace TESTMUL datafile '+TESTMUL' size 10M;

Tablespace created.

SQL> select name from v$datafile;

NAME

+DATA/LHRRAC/DATAFILE/system.258.933550527

+DATA/LHRRAC/DATAFILE/undotbs2.269.933551323

+DATA/LHRRAC/DATAFILE/sysaux.257.933550483

+DATA/LHRRAC/DATAFILE/undotbs1.260.933550575

+DATA/LHRRAC/DATAFILE/example.268.933550723

+DATA/LHRRAC/DATAFILE/users.259.933550573

+TESTMUL/LHRRAC/DATAFILE/testmul.256.934042679

7 rows selected.

SQL>

将存储停掉一块网卡eth1：

[root@OFLHR ~]# ip a

1: lo: <loopback,up,10000> mtu 16436 qdisc noqueue

link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
inet6 ::1/128 scope host 
   valid_lft forever preferred_lft forever

2: eth0: <broadcast,multicast,up,10000> mtu 1500 qdisc pfifo_fast qlen 1000

link/ether 00:0c:29:98:1a:cd brd ff:ff:ff:ff:ff:ff
inet 192.168.59.200/24 brd 192.168.59.255 scope global eth0
inet6 fe80::20c:29ff:fe98:1acd/64 scope link 
   valid_lft forever preferred_lft forever

3: eth1: <broadcast,multicast,up,10000> mtu 1500 qdisc pfifo_fast qlen 1000

link/ether 00:0c:29:98:1a:d7 brd ff:ff:ff:ff:ff:ff
inet 192.168.2.200/24 brd 192.168.2.255 scope global eth1
inet6 fe80::20c:29ff:fe98:1ad7/64 scope link 
   valid_lft forever preferred_lft forever

[root@OFLHR ~]# ifconfig eth1 down

[root@OFLHR ~]# ip a

1: lo: <loopback,up,10000> mtu 16436 qdisc noqueue

link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
inet6 ::1/128 scope host 
   valid_lft forever preferred_lft forever

2: eth0: <broadcast,multicast,up,10000> mtu 1500 qdisc pfifo_fast qlen 1000

link/ether 00:0c:29:98:1a:cd brd ff:ff:ff:ff:ff:ff
inet 192.168.59.200/24 brd 192.168.59.255 scope global eth0
inet6 fe80::20c:29ff:fe98:1acd/64 scope link 
   valid_lft forever preferred_lft forever

3: eth1: <broadcast,multicast> mtu 1500 qdisc pfifo_fast qlen 1000

link/ether 00:0c:29:98:1a:d7 brd ff:ff:ff:ff:ff:ff
inet 192.168.2.200/24 brd 192.168.2.255 scope global eth1

[root@OFLHR ~]#

rac节点查看日志：

[root@raclhr-12cR1-N1 ~]# tail -f /var/log/messages

Jan 23 16:20:51 raclhr-12cR1-N1 iscsid: connect to 192.168.2.200:3260 failed (No route to host)

Jan 23 16:20:57 raclhr-12cR1-N1 iscsid: connect to 192.168.2.200:3260 failed (No route to host)

Jan 23 16:21:03 raclhr-12cR1-N1 iscsid: connect to 192.168.2.200:3260 failed (No route to host)

[root@raclhr-12cR1-N1 ~]# multipath -ll

VMLHRStorage003 (14f504e46494c4552614e35626c6f2d4e794d702d4c344a6c) dm-8 OPNFILER,VIRTUAL-DISK

size=10G features='1 queue_if_no_path' hwhandler='0' wp=rw

`-+- policy='round-robin 0' prio=1 status=active

– 5:0:0:3 sdm 8:192 failed faulty running

`- 4:0:0:3 sdl 8:176 active ready running

VMLHRStorage002 (14f504e46494c455233384b7353432d52454b4c2d79506757) dm-9 OPNFILER,VIRTUAL-DISK

size=10G features='1 queue_if_no_path' hwhandler='0' wp=rw

`-+- policy='round-robin 0' prio=1 status=active

– 5:0:0:2 sdj 8:144 failed faulty running

`- 4:0:0:2 sdk 8:160 active ready running

VMLHRStorage001 (14f504e46494c455242674c7079392d753750482d63734443) dm-7 OPNFILER,VIRTUAL-DISK

size=10G features='1 queue_if_no_path' hwhandler='0' wp=rw

`-+- policy='round-robin 0' prio=1 status=active

– 4:0:0:1 sdi 8:128 active ready running

`- 5:0:0:1 sdh 8:112 failed faulty running

VMLHRStorage000 (14f504e46494c455232326c6c76442d4361634f2d4d4f4d41) dm-6 OPNFILER,VIRTUAL-DISK

size=10G features='1 queue_if_no_path' hwhandler='0' wp=rw

`-+- policy='round-robin 0' prio=1 status=active

– 4:0:0:0 sdf 8:80 active ready running

`- 5:0:0:0 sdg 8:96 failed faulty running

[root@raclhr-12cR1-N1 ~]#

表空间可以正常访问：

SQL> create table tt tablespace TESTMUL as select * from dual;

Table created.

SQL> select * from tt;

D

–

X

SQL>

同理，将eth1进行up，而将eth0宕掉，表空间依然正常。重启集群和存储后，集群一切正常。

第四章 测试多路径

重新搭建一套多路径的环境来测试多路径。

最简单的测试方法，是用dd往磁盘读写数据，然后用iostat观察各通道的流量和状态，以判断Failover或负载均衡方式是否正常：

dd if=/dev/zero of=/dev/mapper/mpath0

iostat -k 2

[root@orcltest ~]# multipath -ll

VMLHRStorage003 (14f504e46494c4552674a61727a472d523449782d5336784e) dm-3 OPNFILER,VIRTUAL-DISK

size=10G features='1 queue_if_no_path' hwhandler='0' wp=rw

`-+- policy='round-robin 0' prio=1 status=active

– 35:0:0:2 sdf 8:80 active ready running

`- 36:0:0:2 sdg 8:96 active ready running

VMLHRStorage002 (14f504e46494c4552506a5a5954422d6f6f4e652d34423171) dm-2 OPNFILER,VIRTUAL-DISK

size=10G features='1 queue_if_no_path' hwhandler='0' wp=rw

`-+- policy='round-robin 0' prio=1 status=active

– 35:0:0:3 sdh 8:112 active ready running

`- 36:0:0:3 sdi 8:128 active ready running

VMLHRStorage001 (14f504e46494c4552324b583573332d774e5a622d696d7334) dm-1 OPNFILER,VIRTUAL-DISK

size=10G features='1 queue_if_no_path' hwhandler='0' wp=rw

`-+- policy='round-robin 0' prio=1 status=active

– 35:0:0:1 sdd 8:48 active ready running

`- 36:0:0:1 sde 8:64 active ready running

VMLHRStorage000 (14f504e46494c45523431576859532d643246412d5154564f) dm-0 OPNFILER,VIRTUAL-DISK

size=10G features='1 queue_if_no_path' hwhandler='0' wp=rw

`-+- policy='round-robin 0' prio=1 status=active

– 35:0:0:0 sdb 8:16 active ready running

`- 36:0:0:0 sdc 8:32 active ready running

[root@orcltest ~]# dd if=/dev/zero of=/dev/mapper/VMLHRStorage001

重新开一个窗口执行iostat -k 2可以看到：

avg-cpu: %user %nice %system %iowait %steal %idle

       0.00    0.00    5.23   20.78    0.00   73.99

Device: tps kB_read/s kB_wrtn/s kB_read kB_wrtn

sda 9.00 0.00 92.00 0 184

scd0 0.00 0.00 0.00 0 0

sdb 0.00 0.00 0.00 0 0

sdc 0.00 0.00 0.00 0 0

sdd 1197.50 4704.00 10886.00 9408 21772

sde 1197.50 4708.00 10496.00 9416 20992

sdh 0.00 0.00 0.00 0 0

sdi 0.00 0.00 0.00 0 0

sdf 0.00 0.00 0.00 0 0

sdg 0.00 0.00 0.00 0 0

dm-0 0.00 0.00 0.00 0 0

dm-4 0.00 0.00 0.00 0 0

dm-10 0.00 0.00 0.00 0 0

dm-1 2395.00 9412.00 21382.00 18824 42764

dm-2 0.00 0.00 0.00 0 0

dm-3 0.00 0.00 0.00 0 0

dm-5 0.00 0.00 0.00 0 0

dm-6 0.00 0.00 0.00 0 0

dm-7 0.00 0.00 0.00 0 0

dm-8 0.00 0.00 0.00 0 0

dm-9 0.00 0.00 0.00 0 0

![1756815180073-611f1e04-3279-42e3-84a7-0dfb0f944384.jpg](http://images2015.cnblogs.com/blog/646850/201701/646850-20170123231449769-1979273361.jpg)

好了，有关使用OpenFiler来模拟存储配置RAC中ASM共享盘及多路径的测试就到此为止了，2016年结束了，今天是1月23日，明天是1月24日，小麦苗回家过年了，O(∩_∩)O~。

4.1 有关多路径其它理论知识

用multipath生成映射后，会在/dev目录下产生多个指向同一条链路的设备：

/dev/mapper/mpathn

/dev/mpath/mpathn

/dev/dm-n

但它们的来源是完全不同的：

/dev/mapper/mpathn 是multipath虚拟出来的多路径设备，我们应该使用这个设备；/dev/mapper 中的设备是在引导过程中生成的。可使用这些设备访问多路径设备，例如在生成逻辑卷时。

/dev/mpath/mpathn 是udev设备管理器创建的，实际上就是指向下面的dm-n设备，仅为了方便，不能用来挂载；提供 /dev/mpath 中的设备是为了方便，这样可在一个目录中看到所有多路径设备。这些设备是由 udev 设备管理器生成的，且在系统需要访问它们时不一定能启动。请不要使用这些设备生成逻辑卷或者文件系统。

/dev/dm-n 是软件内部自身使用的，不能被软件以外使用，不可挂载。所有 /dev/dm-n 格式的设备都只能是作为内部使用，且应该永远不要使用。

简单来说，就是我们应该使用/dev/mapper/下的设备符。对该设备即可用fdisk进行分区，或创建为pv。

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