AIX系统逻辑卷管理

前言：

  前期项目需要部署多套AIX环境下RAC集群，之前很少接触AIX系统，上来被创建逻辑卷等基本命令打脸了，其实网上搜下资料很多，总结一下，也是方便自己日后查阅。

创建逻辑卷

1.查看所有磁盘设备  

# lsdev -Cc disk

hdisk0  Available 50-T1-01 Huawei XSG1 FC Disk Drive

hdisk1  Available 50-T1-01 Huawei XSG1 FC Disk Drive

hdisk2  Available 50-T1-01 Huawei XSG1 FC Disk Drive

hdisk3  Available 50-T1-01 Huawei XSG1 FC Disk Drive

hdisk4  Available 50-T1-01 Huawei XSG1 FC Disk Drive

hdisk5  Available 50-T1-01 Huawei XSG1 FC Disk Drive

hdisk6  Available 50-T1-01 Huawei XSG1 FC Disk Drive

hdisk7  Available 50-T1-01 Huawei XSG1 FC Disk Drive

hdisk8  Available 50-T1-01 Huawei XSG1 FC Disk Drive

hdisk9  Available 50-T1-01 Huawei XSG1 FC Disk Drive

hdisk10 Available 50-T1-01 Huawei XSG1 FC Disk Drive

hdisk11 Available 50-T1-01 Huawei XSG1 FC Disk Drive

hdisk12 Available 50-T1-01 Huawei XSG1 FC Disk Drive

hdisk13 Available 50-T1-01 Huawei XSG1 FC Disk Drive

hdisk14 Available 50-T1-01 Huawei XSG1 FC Disk Drive

hdisk15 Available 50-T1-01 Huawei XSG1 FC Disk Drive

hdisk16 Available 50-T1-01 Huawei XSG1 FC Disk Drive

批注：其中hdisk0是本地存储，hdisk1-13是数据库的共享存储，hdisk14-16是后期申请挂载的共享存储用于OGG数据同步存储路径和数据库备份用的

2.查看磁盘大小

# bootinfo -s hdisk14

819200

# bootinfo -s hdisk15

# bootinfo -s hdisk16

3.创建PV，用户数据库的备份和OGG数据同步 hdisk14-16

# chdev -a pv=yes -l hdisk14

# chdev -a pv=yes -l hdisk15

# chdev -a pv=yes -l hdisk16

4.创建卷组vg

# mkvg -y vgbackup hdisk14 hdisk15 hdisk16

# lsvg vgbackup  

5.创建逻辑卷LV   --分配2T空间

# mklv -t jfs2 -y lvbackup vgbackup 2000

# crfs -v jfs2 -d lvbackup -m /oracle -p 'rw' -a logname='INLINE'

6.查看挂载点   --查看VG中LV分配情况以及对应的文件系统

# lsvg -l vgbackup

# mount /oracle

# chown -R oracle.dba /oracle

批注：设置开机自动挂载，这点很重要，修改/etc/filesystems配置文件，mount yes

补充：

1.查看卷组以及卷组详细信息

# lsvg -o

vgbackup

rootvg

# lsvg rootvg

VOLUME GROUP:       rootvg                   VG IDENTIFIER:  00fa363400004c0000000154ec43ceef

VG STATE:           active                   PP SIZE:        256 megabyte(s)

VG PERMISSION:      read/write               TOTAL PPs:      799 (204544 megabytes)

MAX LVs:            256                      FREE PPs:       592 (151552 megabytes)

LVs:                12                       USED PPs:       207 (52992 megabytes)

OPEN LVs:           11                       QUORUM:         2 (Enabled)

TOTAL PVs:          1                        VG DESCRIPTORS: 2

STALE PVs:          0                        STALE PPs:      0

ACTIVE PVs:         1                        AUTO ON:        yes

MAX PPs per VG:     32512                                     

MAX PPs per PV:     1016                     MAX PVs:        32

LTG size (Dynamic): 256 kilobyte(s)          AUTO SYNC:      no

HOT SPARE:          no                       BB POLICY:      relocatable 

PV RESTRICTION:     none                     INFINITE RETRY: no

DISK BLOCK SIZE:    512                      CRITICAL VG:    no

FS SYNC OPTION:     no

批注：这里对创建新逻辑卷有用的信息是PP SIZE free PPS 我们看到PP大小是256M，还有592个PP未分配给逻辑卷(151552M空闲空间)

2.创建逻辑卷

首先查看卷组所在的盘：

# lsvg -p rootvg

rootvg:

PV_NAME           PV STATE          TOTAL PPs   FREE PPs    FREE DISTRIBUTION

hdisk0            active            799         592         159..103..10..160..160

创建逻辑卷：

--查看使用的文件系统类型

# lsvg -l rootvg

# mklv -y'lv_oracle' -t'jfs2' rootvg 400 hdisk0      --创建100G

格式化文件系统：

# /usr/sbin/crfs -v jfs2 -d 'lv_oracle' -m '/app' -A yes -p rw

File system created successfully.

104854196 kilobytes total disk space.

New File System size is 209715200

挂载：

# mount /app

查看刚刚指定的挂载路径

# df -sg /app

Filesystem    GB blocks     Free* %Used    Iused %Iused Mounted on

/dev/lv_oracle    100.00     99.98    1%        4     1% /app

查看/etc/filesystems中/app的挂载信息：

/app:

        dev             = /dev/lv_oracle

        vfs             = jfs2

        log             = /dev/hd8

        mount           = true

        options         = rw

        account         = false 

逻辑卷扩容

当oracle的安装目录不足时，登录oracle数据库的时候提示设备空间不足，提示如下：

oracle@s1p2[/oracle/dumpfile]$sqlplus / as sysdba

SQL*Plus: Release 11.2.0.4.0 Production on Mon Nov 14 17:44:09 2016

Copyright (c) 1982, 2013, Oracle.  All rights reserved.

ERROR:

ORA-09817: Write to audit file failed.

IBM AIX RISC System/6000 Error: 28: No space left on device

Additional information: 12

ORA-01075: you are currently logged on

逻辑卷扩容：

# lsvg -lp rootvg

rootvg:

PV_NAME           PV STATE          TOTAL PPs   FREE PPs    FREE DISTRIBUTION

hdisk0            active            799         328         159..39..00..00..130

# chfs -a size=+50G /dev/fslv00    --扩充50G

扩容后查看：

# df -sg /app

Filesystem    GB blocks     Free* %Used    Iused %Iused Mounted on

/dev/fslv00      100.00     49.68   51%    69126     1% /app

转子<https://blog.51cto.com/secdata/1872789>