1,建立镜像文件 [root@tonykorn97 root]# cd /informix.links/ [root@tonykorn97 root]# mkdir m_front [root@tonykorn97 root]# cd m_front [root@tonykorn97 root]# touch rootdbs [root@tonykorn97 root]# touch plogdbs [root@tonykorn97 root]# touch llogdbs [root@tonykorn97 root]# touch tempdbs [root@tonykorn97 root]# touch datadbs [root@tonykorn97 root]# chmod 660 * [root@tonykorn97 root]# cd .. [root@tonykorn97 root]# chown -R informix:informix m_front

2，数据文件统一性操作

onbar -b -l -conmode -c弹出磁带

3，运行中，没有修改onconfig文件

[informix@tonykorn97 informix]$ ls -al /informix.links/m_front/*-rw-rw---- 1 informix informix 0 Feb 12 22:23 /informix.links/m_front/datadbs-rw-rw---- 1 informix informix 0 Feb 12 22:23 /informix.links/m_front/llogdbs-rw-rw---- 1 informix informix 0 Feb 12 22:23 /informix.links/m_front/plogdbs-rw-rw---- 1 informix informix 0 Feb 12 22:23 /informix.links/m_front/rootdbs-rw-rw---- 1 informix informix 0 Feb 12 22:32 /informix.links/m_front/tempdbs[informix@tonykorn97 informix]$ onspaces -m rootdbs -p /informix.links/front/rootdbs -o 0 -m /informix.links/m_front/rootdbs 0IBM Informix Dynamic Server was initialized with no mirroring.

4，修改onconfig文件。

MIRROR 1 # Mirroring flag (Yes = 1, No = 0)MIRRORPATH /informix.links/m_front/rootdbs # Path for device containing mirrored root启动是报：Forking 1 'soctcp' listener threads...succeededStarting tracing...succeededInitializing 1 flushers...succeededSENDER IS NULL NO MAIL WILL BE SENTInitializing log/checkpoint information...succeededOpening primary chunks...succeededOpening mirror chunks...succeededInitializing dbspaces...Mismatch in configuration file : MIRRORPATH = /informix.links/m_front/rootdbs.Root chunk was not mirrored.Add mirroring using onspaces or onmonitor.FAILEDoninit: Fatal error in shared memory initialization

5，修改onconfig文件

只修改：MIRROR 1 # Mirroring flag (Yes = 1, No = 0)正常启动23:45:16 Onconfig parameter MIRROR modified from 0 to 1.23:45:16 Dataskip is now OFF for all dbspaces23:45:16 Checkpoint Completed: duration was 0 seconds.23:45:16 Checkpoint loguniq 2328, logpos 0x10018, timestamp: 0xa7aebdc

23:45:16 Maximum server connections 0

23:45:16 On-Line Mode

6，添加rootdbs镜像[informix@tonykorn97 etc]$ onspaces -m rootdbs -p /informix.links/front/rootdbs -o 0 -m /informix.links/m_front/rootdbs 0WARNING: Turning mirror on for 'rootdbs'.

Do you really want to continue? (y/n)y

Verifying physical disk space, please wait ...The Space "rootdbs" is now mirrored.[informix@tonykorn97 etc]$

日志信息

23:48:42 Checkpoint Completed: duration was 0 seconds.23:48:42 Checkpoint loguniq 2328, logpos 0x111fc, timestamp: 0xa7aebed

23:48:42 Maximum server connections 0

23:48:42 The Space "rootdbs" is now mirrored.

23:48:42 Space 'rootdbs' -- Recovery Begins(0x523bb4c8)

23:48:42 Chunk Number 1 - '/informix.links/m_front/rootdbs' -- Recovery Begins(0x523bb4c8)23:49:38 Chunk Number 1 - '/informix.links/m_front/rootdbs' -- Online23:49:38 Checkpoint Completed: duration was 0 seconds.23:49:38 Checkpoint loguniq 2328, logpos 0x13018, timestamp: 0xa7aebf7

23:49:38 Maximum server connections 0

23:49:38 Space 'rootdbs' -- Recovery Complete(0x523bb4c8)

7，增加其它数据空间

onspaces -m plogdbs -p /informix.links/front/plogdbs -o 0 -m /informix.links/m_front/plogdbs 0onspaces -m llogdbs -p /informix.links/front/llogdbs -o 0 -m /informix.links/m_front/llogdbs 0onspaces -m tempdbs -p /informix.links/front/tempdbs -o 0 -m /informix.links/m_front/tempdbs 0onspaces -m datadbs -p /informix.links/front/datadbs -o 0 -m /informix.links/m_front/datadbs 0

[informix@tonykorn97 etc]$ onspaces -m tempdbs -p /informix.links/front/tempdbs -o 0 -m /informix.links/m_front/tempdbs 0Cannot mirror a temporary DBspace.

此时数据空间的状态是：

address chunk/dbs offset size free bpages flags pathname5e0fd948 1 1 5 64000 58932 PO-B /informix.links/front/rootdbs5e0fdad0 1 1 5 64000 0 MO-B /informix.links/m_front/rootdbs5e90e258 2 2 5 256000 447 PO-B /informix.links/front/plogdbs5ea0ec28 2 2 5 256000 0 MO-B /informix.links/m_front/plogdbs5e90e3e0 3 3 5 512000 1947 PO-B /informix.links/front/llogdbs5ea0edb0 3 3 5 512000 0 MX-B /informix.links/m_front/llogdbs5e90e568 4 4 5 512000 511947 PO-B /informix.links/front/tempdbs5e90e6f0 5 5 5 4008000 3971340 PO-B /informix.links/front/datadbs

8，备份

onbar -b -L 0数据空间状态变为：5e0fd948 1 1 5 64000 58932 PO-B /informix.links/front/rootdbs5e0fdad0 1 1 5 64000 0 MO-B /informix.links/m_front/rootdbs5e90e258 2 2 5 256000 447 PO-B /informix.links/front/plogdbs5ea0ec28 2 2 5 256000 0 MO-B /informix.links/m_front/plogdbs5e90e3e0 3 3 5 512000 1947 PO-B /informix.links/front/llogdbs5ea0edb0 3 3 5 512000 0 MO-B /informix.links/m_front/llogdbs5e90e568 4 4 5 512000 511947 PO-B /informix.links/front/tempdbs5e90e6f0 5 5 5 4008000 3971340 PO-B /informix.links/front/datadbs5ea23e58 5 5 5 4008000 0 MO-B /informix.links/m_front/datadbs

镜像删除

[informix@test ~]$ onspaces -r plogdbsWARNING: Turning mirror off for 'plogdbs'.

Do you really want to continue? (y/n)y

The Space "plogdbs" is no longer mirrored.[informix@test ~]$ onstat -d

IBM Informix Dynamic Server Version 10.00.UC4 -- On-Line -- Up 00:24:06 -- 237528 Kbytes

Dbspaces

address number flags fchunk nchunks pgsize flags owner name5111e7e8 1 0x60002 1 1 2048 M B informix rootdbs5124d7b8 2 0x60001 2 1 2048 N B informix plogdbs5124d918 3 0x40001 3 1 2048 N B informix llogdbs5124da78 4 0x40001 4 1 2048 N B informix datadbs5124dbd8 5 0x42001 5 1 2048 N TB informix tempdbs 5 active, 2047 maximum

Chunks

address chunk/dbs offset size free bpages flags pathname5111e948 1 1 0 500000 497212 PO-B /informix.link/front/rootdbs5111ead0 1 1 0 500000 0 MO-B /informix.link/m_front/rootdbs5125edf0 2 2 50 500000 399947 PO-B /informix.link/front/plogdbs5111eca0 3 3 50 500000 299947 PO-B /informix.link/front/llogdbs5111ee28 4 4 50 2500000 2499947 PO-B /informix.link/front/datadbs5124d630 5 5 0 500000 499947 PO-B /informix.link/front/tempdbs 5 active, 32766 maximum

NOTE: The values in the "size" and "free" columns for DBspace chunks are

displayed in terms of "pgsize" of the DBspace to which they belong.

更改镜像块的状态

1，关闭镜像块

[informix@test ~]$ onspaces -s rootdbs -p /informix.link/m_front/rootdbs -o 0 -DWarning: bringing down a chunk.Do you really want to continue? (y/n)yChunk status successfully changed.[informix@test ~]$ onstat -d

IBM Informix Dynamic Server Version 10.00.UC4 -- On-Line -- Up 00:37:13 -- 237528 Kbytes

Dbspaces

address number flags fchunk nchunks pgsize flags owner name5111e7e8 1 0x60002 1 1 2048 M B informix rootdbs5124d7b8 2 0x60001 2 1 2048 N B informix plogdbs

Chunks

address chunk/dbs offset size free bpages flags pathname5111e948 1 1 0 500000 497212 PO-B /informix.link/front/rootdbs5111ead0 1 1 0 500000 0 MD-B /informix.link/m_front/rootdbs

2，恢复镜像块并使它联机

[informix@test ~]$ onspaces -s rootdbs -p /informix.link/m_front/rootdbs -o 0 -OWARNING: bringing a down chunk into recovery state.Do you really want to continue? (y/n)yVerifying physical disk space, please wait ...Chunk status successfully changed.

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