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linux上安装RAC时不使用asmlib的多路径配置

news 来源：原创 2024/5/19 12:00:58

FROM:http://t.askmaclean.com/thread-3025-1-1.html

/dev/mapper/mpathXX


如果使用了 多路径方案， 可以直接使用multipath 绑定设备名 不需要用到 asmlib或UDEV

请直接参考 文档：Configuring non-raw multipath devices for Oracle Clusterware 11g (11.1.0, 11.2.0) on RHEL5/OL5 [ID 605828.1]

[root@vrh1 ~]# for i in `cat /proc/partitions | awk '{print $4}' |grep sd | grep [a-z]$`; do echo "### $i: `scsi_id -g -u -s /block/$i`"; done
### sda: SATA_VBOX_HARDDISK_VB83d4445f-b8790695_
### sdb: SATA_VBOX_HARDDISK_VB0db2f233-269850e0_
### sdc: SATA_VBOX_HARDDISK_VBa56f2571-0dd27b33_
### sdd: SATA_VBOX_HARDDISK_VBf6b74ff7-871d1de8_
### sde: SATA_VBOX_HARDDISK_VB5a531910-25f4eb9a_
### sdf: SATA_VBOX_HARDDISK_VB4915e6e3-737b312e_
### sdg: SATA_VBOX_HARDDISK_VB512c8f75-37f4a0e9_
### sdh: SATA_VBOX_HARDDISK_VBc0115ef6-a48bc15d_
### sdi: SATA_VBOX_HARDDISK_VB3a556907-2b72391d_
### sdj: SATA_VBOX_HARDDISK_VB7ec8476c-08641bd4_
### sdk: SATA_VBOX_HARDDISK_VB743e1567-d0009678_


[root@vrh1 ~]# grep -v ^# /etc/multipath.conf
defaults {
user_friendly_names yes
}
defaults {
udev_dir /dev
polling_interval10
selector "round-robin 0"
path_grouping_policy failover
getuid_callout "/sbin/scsi_id -g -u -s /block/%n"
prio_callout /bin/true
path_checker readsector0
rr_min_io 100
rr_weight priorities
failback immediate
#no_path_retry fail
user_friendly_name yes
}
devnode_blacklist {
devnode "^(ram|raw|loop|fd|md|dm-|sr|scd|st)[0-9]*"
devnode "^hd[a-z]"
devnode "^cciss!c[0-9]d[0-9]*"
}
multipaths {
multipath {
wwid SATA_VBOX_HARDDISK_VB0db2f233-269850e0_
alias voting1
path_grouping_policy failover
}
multipath {
wwid SATA_VBOX_HARDDISK_VBa56f2571-0dd27b33_
alias voting2
path_grouping_policy failover
}
multipath {
wwid SATA_VBOX_HARDDISK_VBf6b74ff7-871d1de8_
alias voting3
path_grouping_policy failover
}
multipath {
wwid SATA_VBOX_HARDDISK_VB5a531910-25f4eb9a_
alias ocr1
path_grouping_policy failover
}
multipath {
wwid SATA_VBOX_HARDDISK_VB4915e6e3-737b312e_
alias ocr2
path_grouping_policy failover
}
multipath {
wwid SATA_VBOX_HARDDISK_VB512c8f75-37f4a0e9_
alias ocr3
path_grouping_policy failover
}
}



[root@vrh1 ~]# multipath
[root@vrh1 ~]# multipath -ll
mpath2 (SATA_VBOX_HARDDISK_VB3a556907-2b72391d_) dm-9 ATA,VBOX HARDDISK
size=5.0G features='0' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
`- 8:0:0:0sdi 8:128 active ready running
mpath1 (SATA_VBOX_HARDDISK_VBc0115ef6-a48bc15d_) dm-8 ATA,VBOX HARDDISK
size=5.0G features='0' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
`- 7:0:0:0sdh 8:112 active ready running
ocr3 (SATA_VBOX_HARDDISK_VB512c8f75-37f4a0e9_) dm-7 ATA,VBOX HARDDISK
size=5.0G features='0' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
`- 6:0:0:0sdg 8:96active ready running
ocr2 (SATA_VBOX_HARDDISK_VB4915e6e3-737b312e_) dm-6 ATA,VBOX HARDDISK
size=5.0G features='0' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
`- 5:0:0:0sdf 8:80active ready running
ocr1 (SATA_VBOX_HARDDISK_VB5a531910-25f4eb9a_) dm-5 ATA,VBOX HARDDISK
size=5.0G features='0' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
`- 4:0:0:0sde 8:64active ready running
voting3 (SATA_VBOX_HARDDISK_VBf6b74ff7-871d1de8_) dm-4 ATA,VBOX HARDDISK
size=40G features='0' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
`- 3:0:0:0sdd 8:48active ready running
voting2 (SATA_VBOX_HARDDISK_VBa56f2571-0dd27b33_) dm-3 ATA,VBOX HARDDISK
size=40G features='0' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
`- 2:0:0:0sdc 8:32active ready running
voting1 (SATA_VBOX_HARDDISK_VB0db2f233-269850e0_) dm-2 ATA,VBOX HARDDISK
size=40G features='0' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
`- 1:0:0:0sdb 8:16active ready running
mpath4 (SATA_VBOX_HARDDISK_VB743e1567-d0009678_) dm-11 ATA,VBOX HARDDISK
size=5.0G features='0' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
`- 10:0:0:0 sdk 8:160 active ready running
mpath3 (SATA_VBOX_HARDDISK_VB7ec8476c-08641bd4_) dm-10 ATA,VBOX HARDDISK
size=5.0G features='0' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
`- 9:0:0:0sdj 8:144 active ready running



[root@vrh1 ~]# dmsetup ls | sort
mpath1(253, 8)
mpath2(253, 9)
mpath3(253, 10)
mpath4(253, 11)
ocr1 (253, 5)
ocr2 (253, 6)
ocr3 (253, 7)
VolGroup00-LogVol00 (253, 0)
VolGroup00-LogVol01 (253, 1)
voting1 (253, 2)
voting2 (253, 3)
voting3 (253, 4)
[root@vrh1 ~]# ls -l /dev/mapper/*
crw------- 1 root root10, 62 Oct 17 09:58 /dev/mapper/control
brw-rw---- 1 root disk 253,8 Oct 19 00:11 /dev/mapper/mpath1
brw-rw---- 1 root disk 253,9 Oct 19 00:11 /dev/mapper/mpath2
brw-rw---- 1 root disk 253, 10 Oct 19 00:11 /dev/mapper/mpath3
brw-rw---- 1 root disk 253, 11 Oct 19 00:11 /dev/mapper/mpath4
brw-rw---- 1 root disk 253,5 Oct 19 00:11 /dev/mapper/ocr1
brw-rw---- 1 root disk 253,6 Oct 19 00:11 /dev/mapper/ocr2
brw-rw---- 1 root disk 253,7 Oct 19 00:11 /dev/mapper/ocr3
brw-rw---- 1 root disk 253,0 Oct 17 09:58 /dev/mapper/VolGroup00-LogVol00
brw-rw---- 1 root disk 253,1 Oct 17 09:58 /dev/mapper/VolGroup00-LogVol01
brw-rw---- 1 root disk 253,2 Oct 19 00:11 /dev/mapper/voting1
brw-rw---- 1 root disk 253,3 Oct 19 00:11 /dev/mapper/voting2
brw-rw---- 1 root disk 253,4 Oct 19 00:11 /dev/mapper/voting3
[root@vrh1 ~]# ls -l /dev/dm*
brw-rw---- 1 root root 253,0 Oct 17 09:58 /dev/dm-0
brw-rw---- 1 root root 253,1 Oct 17 09:58 /dev/dm-1
brw-rw---- 1 root root 253, 10 Oct 19 00:11 /dev/dm-10
brw-rw---- 1 root root 253, 11 Oct 19 00:11 /dev/dm-11
brw-rw---- 1 root root 253,2 Oct 19 00:11 /dev/dm-2
brw-rw---- 1 root root 253,3 Oct 19 00:11 /dev/dm-3
brw-rw---- 1 root root 253,4 Oct 19 00:11 /dev/dm-4
brw-rw---- 1 root root 253,5 Oct 19 00:11 /dev/dm-5
brw-rw---- 1 root root 253,6 Oct 19 00:11 /dev/dm-6
brw-rw---- 1 root root 253,7 Oct 19 00:11 /dev/dm-7
brw-rw---- 1 root root 253,8 Oct 19 00:11 /dev/dm-8
brw-rw---- 1 root root 253,9 Oct 19 00:11 /dev/dm-9
[root@vrh1 ~]#ls -l /dev/disk/by-id/
total 0
lrwxrwxrwx 1 root root 15 Oct 17 09:58 scsi-SATA_VBOX_HARDDISK_VB0db2f233-269850e0 -> ../../asm-diskb
lrwxrwxrwx 1 root root 15 Oct 17 09:58 scsi-SATA_VBOX_HARDDISK_VB3a556907-2b72391d -> ../../asm-diski
lrwxrwxrwx 1 root root 15 Oct 17 09:58 scsi-SATA_VBOX_HARDDISK_VB4915e6e3-737b312e -> ../../asm-diskf
lrwxrwxrwx 1 root root 15 Oct 17 09:58 scsi-SATA_VBOX_HARDDISK_VB512c8f75-37f4a0e9 -> ../../asm-diskg
lrwxrwxrwx 1 root root 15 Oct 17 09:58 scsi-SATA_VBOX_HARDDISK_VB5a531910-25f4eb9a -> ../../asm-diske
lrwxrwxrwx 1 root root 15 Oct 17 09:58 scsi-SATA_VBOX_HARDDISK_VB743e1567-d0009678 -> ../../asm-diskk
lrwxrwxrwx 1 root root 15 Oct 17 09:58 scsi-SATA_VBOX_HARDDISK_VB7ec8476c-08641bd4 -> ../../asm-diskj
lrwxrwxrwx 1 root root9 Oct 17 09:58 scsi-SATA_VBOX_HARDDISK_VB83d4445f-b8790695 -> ../../sda
lrwxrwxrwx 1 root root 10 Oct 17 09:58 scsi-SATA_VBOX_HARDDISK_VB83d4445f-b8790695-part1 -> ../../sda1
lrwxrwxrwx 1 root root 10 Oct 17 09:58 scsi-SATA_VBOX_HARDDISK_VB83d4445f-b8790695-part2 -> ../../sda2
lrwxrwxrwx 1 root root 15 Oct 17 09:58 scsi-SATA_VBOX_HARDDISK_VBa56f2571-0dd27b33 -> ../../asm-diskc
lrwxrwxrwx 1 root root 15 Oct 17 09:58 scsi-SATA_VBOX_HARDDISK_VBc0115ef6-a48bc15d -> ../../asm-diskh
lrwxrwxrwx 1 root root 15 Oct 17 09:58 scsi-SATA_VBOX_HARDDISK_VBf6b74ff7-871d1de8 -> ../../asm-diskd
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2. Re: asm磁盘使用链路聚合设备名，IO性能只有非聚合设备的1/6!
LiuMaclean(刘相兵)
Expert
LiuMaclean(刘相兵) Jul 21, 2013 11:09 AM (in response to 13628)
step 1:
[oracle@vrh8 mapper]$ cat /etc/multipath.conf




multipaths {
multipath {
wwid SATA_VBOX_HARDDISK_VBf6b74ff7-871d1de8_
alias asm-disk1
mode 660
uid 501
gid 503
}


multipath {
wwid SATA_VBOX_HARDDISK_VB0db2f233-269850e0_
alias asm-disk2
mode 660
uid 501
gid 503
}


multipath {
wwid SATA_VBOX_HARDDISK_VBa56f2571-0dd27b33_
alias asm-disk3
mode 660
uid 501
gid 503
}
}


step 2:

reboot or service multipathdrestart

step 3:

[oracle@vrh8 mapper]$ ls -l /dev/mapper/asm-disk*
brw-rw---- 1 grid asmadmin 253, 4 Jul 21 07:02 /dev/mapper/asm-disk1
brw-rw---- 1 grid asmadmin 253, 2 Jul 21 07:02 /dev/mapper/asm-disk2
brw-rw---- 1 grid asmadmin 253, 3 Jul 21 07:02 /dev/mapper/asm-disk3

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