在rac环境中，HACMP的vg为unconcurrent状态，是多么糟糕的一件事，而这个不幸就在某生产系统上发生了。
环境介绍：
AIX 6.1的系统，使用的是EMC CLARiiON存储，oracle10.2.0.5
问题状况：
先看下各个卷组的状态
data03vg
lsvg data03vg
VOLUME GROUP: data03vg VG IDENTIFIER:
00f79d1100004c00000001386f00edfb
VG STATE: active PP SIZE: 128
megabyte
(s)
VG PERMISSION: read/write TOTAL PPs: 5315
(680320
megabytes)
MAX LVs: 512 FREE PPs: 711 (91008
megabytes)
LVs: 78 USED PPs: 4604
(589312
megabytes)
OPEN LVs: 0 QUORUM: 3 (Enabled)
TOTAL PVs: 5 VG DESCRIPTORS: 5
STALE PVs: 0 STALE PPs: 0
ACTIVE PVs: 5 AUTO ON: no
Concurrent: Enhanced-Capable Auto-Concurrent: Disabled
VG Mode: Non-Concurrent
MAX PPs per VG: 130048
MAX PPs per PV: 2032 MAX PVs: 64
LTG size (Dynamic): 1024 kilobyte(s) AUTO SYNC: no
HOT SPARE: no BB POLICY: relocatable
PV RESTRICTION: none INFINITE RETRY: no
data01vg
lsvg data01vg
VOLUME GROUP: data01vg VG IDENTIFIER:
00f79d1100004c00000001386effcc48
VG STATE: active PP SIZE: 128
megabyte
(s)
VG PERMISSION: read/write TOTAL PPs: 6378
(816384
megabytes)
MAX LVs: 512 FREE PPs: 1146
(146688
megabytes)
LVs: 88 USED PPs: 5232
(669696
megabytes)
OPEN LVs: 0 QUORUM: 4 (Enabled)
TOTAL PVs: 6 VG DESCRIPTORS: 6
STALE PVs: 0 STALE PPs: 0
ACTIVE PVs: 6 AUTO ON: no
Concurrent: Enhanced-Capable Auto-Concurrent: Disabled
VG Mode: Non-Concurrent
MAX PPs per VG: 130048
MAX PPs per PV: 2032 MAX PVs: 64
LTG size (Dynamic): 1024 kilobyte(s) AUTO SYNC: no
HOT SPARE: no BB POLICY: relocatable
PV RESTRICTION: none INFINITE RETRY: no
data02vg
lsvg data02vg
VOLUME GROUP: data02vg VG IDENTIFIER:
00f79d1100004c00000001386f007c90
VG STATE: active PP SIZE: 128
megabyte
(s)
VG PERMISSION: read/write TOTAL PPs: 2126
(272128
megabytes)
MAX LVs: 512 FREE PPs: 18 (2304
megabytes)
LVs: 39 USED PPs: 2108
(269824
megabytes)
OPEN LVs: 0 QUORUM: 2 (Enabled)
TOTAL PVs: 2 VG DESCRIPTORS: 3
STALE PVs: 0 STALE PPs: 0
ACTIVE PVs: 2 AUTO ON: no
Concurrent: Enhanced-Capable Auto-Concurrent: Disabled
VG Mode: Non-Concurrent
MAX PPs per VG: 130048
MAX PPs per PV: 2032 MAX PVs: 64
LTG size (Dynamic): 1024 kilobyte(s) AUTO SYNC: no
HOT SPARE: no BB POLICY: relocatable
PV RESTRICTION: none INFINITE RETRY: no
看到vg mode：non-concurrent状态，那在看下vg中pv的状态：
data03vg
lsvg -p data03vg
data03vg:
PV_NAME PV STATE TOTAL PPs FREE PPs FREE
DISTRIBUTION
hdiskpower11 active 1063 43
01..00..00..00..42
hdiskpower17 removed 1063 167
21..00..00..00..146
hdiskpower18 removed 1063 167
21..00..00..00..146
hdiskpower19 removed 1063 167
21..00..00..00..146
hdiskpower20 removed 1063 167
21..00..00..00..146
data01vg
lsvg -p data01vg
data01vg:
PV_NAME PV STATE TOTAL PPs FREE PPs FREE
DISTRIBUTION
hdiskpower7 active 1063 0
00..00..00..00..00
hdiskpower8 active 1063 20
00..00..00..00..20
hdiskpower9 active 1063 24
02..00..00..00..22
hdiskpower10 active 1063 0
00..00..00..00..00
hdiskpower16 missing 1063 551
21..00..105..212..213
hdiskpower21 missing 1063 551
data02vg
lsvg -p data02vg
data02vg:
PV_NAME PV STATE TOTAL PPs FREE PPs FREE
DISTRIBUTION
hdiskpower0 active 1063 0
00..00..00..00..00
hdiskpower24 active 1063 18
00..00..00..00..18
有好多盘不是missing就是removed的，数据库日志报错为：
Thu Mar 21 17:53:58 BEIST 2013
Errors in
file /oracle/app/oracle/admin/ctsdb/bdump/ctsdb2_m000_19595456.trc:
ORA-27072: File I/O error
IBM AIX RISC System/6000 Error: 5: I/O error
odmget HACMPdisktype
HACMPdisktype:
PdDvLn = "disk/pseudo/power"
ghostdisks = "SCSI3"
checkres = "SCSI_TUR"
breakres = "/usr/lpp/EMC/Symmetrix/bin/emcpowerreset"
parallel = "false"
makedev = "MKDEV"
reserved1 = ""
reserved2 = ""
reserved3 = ""
可以看到parallel=false，很悲剧啊。
l***c –a | grep cl
clcomd caa 7929856 active
clcomdES clcomdES 9633858 active
clstrmgrES cluster 9240596 active
gsclvmd inoperative
clinfoES cluster 17104944 active
clconfd caa inoperative
nimsh nimclient inoperative
两节点的gsclvmd 都是inoperative，看来只能重启hacmp来把gsclvmd给拉起来。
解决过程：
1.先进行数据库的备份，然后停库：
节点1:
su – oracle
srvctl stop listener –n ctscrm1
ps –ef | grep “LOCAL=NO”| grep –v grep | awk ‘{print $2}’|xargs kill -9
oracle> alter system switch logfile;
oracle> alter system checkpoint;
srvctl stop instance –d ctsdb –I ctsdb1
节点2:
su – oracle
srvctl stop listener –n ctscrm2
ps –ef | grep “LOCAL=NO”| grep –v grep | awk ‘{print $2}’|xargs kill -9
oracle> alter system switch logfile;
oracle> alter system checkpoint;
srvctl stop instance –d ctsdb –I ctsdb2
关闭crs：节点1和节点2
crsctlstop crs
2.重启hacmp
smit clstop
wKiom1NFIJvC082BAAGVicfO2Ww907.jpg
结果悲剧再次发生，两个节点虽然hacmp都停，可现在本身就有异常，想把hacmp停了，以为vg也可以跟着卸载下来，可事实是vg都没卸载下来，手动卸载，节点1的data01vg一直卡着不动，无解了，只能shutdown –Fr了，重启后vg都已经卸载了。开始修改EMC clarion系统存储，需要使用并行环境：
smit hacmp》extended configure》extended resource configure》hacmp extended resource configure 》 configure custom disk methods 》 change/show custom disk methods
选择disk/pseudo/power 修改parallel 为true
两个节点都这么做。
odmget HACMPdisktype
HACMPdisktype:
PdDvLn = "disk/pseudo/power"
ghostdisks = "SCSI3"
checkres = "SCSI_TUR"
breakres = "/usr/lpp/EMC/Symmetrix/bin/emcpowerreset"
parallel = "true"
makedev = "MKDEV"
reserved1 = ""
reserved2 = ""
reserved3 = ""
OK，现在parallel为true了。
启动hacmp：smit clstart 这回又出问题了，启动报错，具体的错误我没记，反正报的就是卷组的时间戳不同步了。继续搞：
节点1，2
exportvg data01vg;import –y data01vg hdiskpower7
exportvg data02vg;import –y data02vg hdiskpower24
exportvg data03vg;import –y data03vg hdiskpower17
这回在启动hacmp，smit clstart 这时OK了，hacmp可以正常启动了，检查各个vg的状态也都是Concurrent的了。
wKioL1NFIc_wJl_hAAIEPEMwE1A773.jpg
3.启动rac
本以为现在问题已经解决了，启动crsctl start crs；crs_stat –t
crs没启动，根本就没有反应。/etc/init.d/init.crs start 还是启动不了，没任何反应，日志也没任何变化，这时想到了，由于exportvg和importvg了，权限没有进行修改。修改裸设备的权限：
cd /dev;chown oracle:dba rdb*;chown oracle:dba rbss*;chown oracle:dba rctsbss*;
这些是数据文件的lv。
chown oracle:dba rvote*;chmod 766 rvote*
chmod 766 *ocr*;
/etc/init.d/init.crs start;
这时启动了，过一会crs_stat –t可以看到都是online了，到此问题都解决了。
总结：
貌似这次问题原因的产生就是上回重启系统时，hacmp的并行没有修改，导致的，而且上回是强制挂载的卷组，有1个节点是通过hacmp挂载不上的(以前别的同事在维护，他操作的，也是他说的）。
lslpp –l | grep –i emc
EMC.CELERRA.aix.rte 5.3.0.6 COMMITTED EMC CELERRA AIX Support
EMC.CLARiiON.aix.rte 5.3.0.6 COMMITTED EMC CLARiiON AIX Support
EMC.CLARiiON.fcp.rte 5.3.0.6 COMMITTED EMC CLARiiON FCP Support
EMC.CLARiiON.ha.rte 5.3.0.6 COMMITTED EMC CLARiiON HA Concurrent
EMCpower.base 5.3.1.1 COMMITTED PowerPath Base Driver and
EMCpower.encryption 5.3.1.1 COMMITTED PowerPath Encryption with RSA
EMCpower.migration_enabler
EMCpower.mpx 5.3.1.1 COMMITTED PowerPath Multi_Pathing
EMC.CELERRA.aix.rte 5.3.0.6 COMMITTED EMC CELERRA AIX Support
EMC.CLARiiON.aix.rte 5.3.0.6 COMMITTED EMC CLARiiON AIX Support
EMC.CLARiiON.fcp.rte 5.3.0.6 COMMITTED EMC CLARiiON FCP Support
devices.common.IBM.modemcfg.data
这个就是emc存储提供ha concurrent的软件包，如果没有的话是不支持不了concurrent的，得需要安装。然后进行parallel的修改就像上面提到的：
smit hacmp》extended configure》extended resource configure》hacmp extended resource configure 》 configure custom disk methods 》 change/show custom disk methods
或者
/usr/sbin/cluster/utilities/clcustomdisk –c -tdisk/pseudo/power -Ndisk/pseudo/power -gSCSI3 -hSCSI_TUR -b/usr/lpp/EMC/CLARiiON/bin/emcpowerreset -ptrue –mMKDEV
还好这次操作，夜间进行申请了好久的停机时间。。。。
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oracle rac hacmp vg linux