xfsdump命令使用
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<div id="article_content" class="article_content"> 一：使用xfsdump备份和恢复xfs文件系统 首先了解一下xfsdump的备份级别有以下两种，默认为0（即完全备份） 0 完全备份 1 <= level <= 9 增量备份 1.创建xfs文件系统并挂载到/data目录下 -x4xj:~ # mkfs.xfs /dev/sdb linux-x4xj:~ # mkdir /data linux-x4xj:~ # mount /dev/sdb /data linux-x4xj:~ # df -h Filesystem SizeUsed Avail Use% Mounted on /dev/sda2 4.0G1.6G 2.2G 43% / devtmpfs 465M168K 465M 1% /dev tmpfs 465M 0465M 0% /dev/shm /dev/sdb 20G33M 20G 1% /data linux-x4xj:~ # 2.备份 首先复制一些文件到/data目录下，以便测试，如下所示 linux-x4xj:~ # ls -l /data total 1792 -rwxr--r-- 1 nobody nobody 1832960 Sep 1314:12 iozone3_429.tar drwxr-xr-x 2 nobody nobody 102 Sep 16 20:46 lustre-client-el5.8-2.1.6 linux-x4xj:~ # ◆首先备份/data整个目录到/tmp目录下 测试过程中发现：如果命令这样写xfsdump -f /tmp/dump_data /data/，就会提示错误（xfsdump:ERROR: /data/ does not identify a file system） linux-x4xj:~ # xfsdump -f /tmp/dump_data /data/ xfsdump: using file dump (drive_simple)strategy xfsdump: version 3.0.5 (dump format 3.0) -Running single-threaded ============================= dump labeldialog ============================== please enter label for this dump session(timeout in 300 sec) -> dump_data session label entered:"dump_data" ---------------------------------end dialog --------------------------------- xfsdump: xfsdump: usage: xfsdump [ -a (dump DMFdualstate files as offline) ] * * * 必须要这样写xfsdump -f /tmp/dump_data /data（即/data后面的/不能要）这样才能成功 linux-x4xj:~ # xfsdump -f /tmp/data_dump /data xfsdump: using file dump (drive_simple)strategy xfsdump: version 3.0.5 (dump format 3.0) -Running single-threaded ============================= dump labeldialog ============================== please enter label for this dump session(timeout in 300 sec) -> data_dump session label entered:"data_dump" --------------------------------- end dialog--------------------------------- xfsdump: level 0 dump of linux-x4xj:/data xfsdump: dump date: Tue Sep 16 20:58:582014 xfsdump: session id:ca3390ef-1a8c-429b-8d87-4e60d22d3c54 xfsdump: session label: "data_dump" xfsdump: ino map phase 1: constructinginitial dump list xfsdump: ino map phase 2: skipping (nopruning necessary) xfsdump: ino map phase 3: skipping (onlyone dump stream) xfsdump: ino map construction complete xfsdump: estimated dump size: 70670208bytes ============================= media labeldialog ============================= please enter label for media in drive 0(timeout in 300 sec) -> media0 media label entered: "media0" --------------------------------- end dialog--------------------------------- xfsdump: creating dump session media file 0(media 0,file 0) xfsdump: dumping ino map xfsdump: dumping directories xfsdump: dumping non-directory files xfsdump: ending media file xfsdump: media file size 70680352 bytes xfsdump: dump size (non-dir files) :70656816 bytes xfsdump: dump complete: 9 seconds elapsed xfsdump: Dump Status: SUCCESS linux-x4xj:~ # ls -l /tmp/data_dump -rw-r--r-- 1 root root 70680352 Sep 1620:59 /tmp/data_dump linux-x4xj:~ # 以上为会话模式，即会提示让你输入label for session和label for dump，可以用下面的命令运行，就不会出现会话模式了 linux-x4xj:~ # xfsdump -f /tmp/data_dump /data -L data_dump -M data_dump ◆备份/data目录下的lustre-client-el5.8-2.1.6子目录到/tmp目录下，命令如下 linux-x4xj:~ # xfsdump -f /tmp/data_lustre_client_dump -s lustre-client-el5.8-2.1.6 /data -L data_lustre_client_dump -M media0 （注意子目录前面不能有/，最后面也不能有/） xfsdump: using file dump (drive_simple)strategy xfsdump: version 3.0.5 (dump format 3.0) -Running single-threaded xfsdump: level 0 dump of linux-x4xj:/data xfsdump: dump date: Tue Sep 16 21:07:14 2014 xfsdump: session id:12d13ad4-47d2-4ea5-94df-afc2d71cb6a4 xfsdump: session label:"data_lustre_client_dump" xfsdump: ino map phase 1: constructinginitial dump list xfsdump: ino map phase 2: skipping (nopruning necessary) xfsdump: ino map phase 3: skipping (onlyone dump stream) xfsdump: ino map construction complete xfsdump: estimated dump size: 68834880bytes xfsdump: creating dump session media file 0(media 0,file 0) xfsdump: dumping ino map xfsdump: dumping directories xfsdump: dumping non-directory files xfsdump: ending media file xfsdump: media file size 68845344 bytes xfsdump: dump size (non-dir files) :68822096 bytes xfsdump: dump complete: 0 seconds elapsed xfsdump: Dump Status: SUCCESS linux-x4xj:~ # ls -l /tmp/data_lustre_client_dump -rw-r--r-- 1 root root 68845344 Sep 1621:07 /tmp/data_lustre_client_dump linux-x4xj:~ # ◆克隆/data（备份所有内容到另一个目录或到另一个硬盘下），本次新加了一个盘用作备份，挂载到了/data2下，开始克隆，命令如下 linux-x4xj:~ #xfsdump - /data | xfsrestore - /data2 或者 linux-x4xj:~ #xfsdump -l 0 - /data | xfsrestore - /data2 （因为默认级别为0） linux-x4xj:~ # ll /data total 1792 -rwxr--r-- 1 nobodynobody 1832960 Sep 13 14:12 iozone3_429.tar drwxr-xr-x 2 nobodynobody 102 Sep 16 20:46lustre-client-el5.8-2.1.6 linux-x4xj:~ # ll /data2/ total 1792 -rwxr--r-- 1 nobodynobody 1832960 Sep 13 14:12 iozone3_429.tar drwxr-xr-x 2 nobodynobody 102 Sep 16 20:46lustre-client-el5.8-2.1.6 linux-x4xj:~ # ◆只克隆/data下的子目录lustre-client-el5.8-2.1.6到/data2目录下，命令如下 linux-x4xj:~ #xfsdump - -s lustre-client-el5.8-2.1.6 /data | xfsrestore - /data2 或者 linux-x4xj:~ #xfsdump -l 0 - -s lustre-client-el5.8-2.1.6 /data | xfsrestore - /data2 linux-x4xj:~ # ll /data2/ total 0 drwxr-xr-x 2 nobodynobody 102 Sep 16 20:46 lustre-client-el5.8-2.1.6 linux-x4xj:~ # 3.查看会话存档 可以使用xfsdump -I来查看session存档 linux-x4xj:~ #xfsdump -I （从存档中选择了一个会话内容如下） session 2: mount point: linux-x4xj:/data device: linux-x4xj:/dev/sdb time: Tue Sep 16 20:58:58 2014 session label: "data_dump" （会话标识） session id: ca3390ef-1a8c-429b-8d87-4e60d22d3c54 level: 0 resumed: NO subtree: NO streams: 1 stream 0: pathname: /tmp/data_dump start: ino 131 offset 0 end: ino 136 offset 0 interrupted: NO media files: 1 media file 0: mfileindex: 0 mfiletype: data mfilesize: 70680352 mfilestart: ino 131 offset 0 mfile end: ino 136 offset 0 medialabel: "media0" （介质标识） media id: 43881f83-231f-4835-a858-4d4ade150efe 4.使用xfsrestore恢复数据 ★模拟删除/data目录内的所有内容，然后恢复数据 linux-x4xj:~ # rm -rf /data/* linux-x4xj:~ #xfsrestore -f /tmp/data_dump /data ★根据会话标识，只恢复某个文件或者是子目录 linux-x4xj:~#xfsrestore-f /tmp/data_dump -L data_dump -s lustre-client-el5.8-2.1.6 /data 5.在没有进行恢复之前可以通过xfsrestore -f/tmp/data_dump -t查看data_dump内容 （编辑：安卓应用网） 【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容! |