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Á¦ ¸ñ : IBM GPFS ÆÄÀϽýºÅÛ¿¡¼ snapshot
ÀÛ¼ºÀÏ : 2011.12.29(¸ñ)
ÀÛ¼ºÀÚ : ÁÁÀºÁøÈ£(truefeel, http://coffeenix.net/ )
1. snapshot »ý¼º
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* Çü½Ä : mmcrsnapshot </dev/µð¹ÙÀ̽º¸í> <½º³À¼¦¸í>
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ÆÄÀϽýºÅÛ´ç ½º³À¼¦Àº ÃÖ´ë 31°³±îÁö Á¦ÇѵǾî ÀÖ´Ù.
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# mmcrsnapshot /dev/gpfs1 data1_snap1
Writing dirty data to disk
Quiescing all file system operations
Writing dirty data to disk again
Creating snapshot.
Resuming operations.
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# mmcrsnapshot /dev/gpfs1 data1_snap1 <-- °°Àº À̸§ÀÌ ÀÌ¹Ì Á¸ÀçÇؼ »ý¼ºÀÌ ¾ÈµÈ´Ù.
File exists
Snapshot directory data1_snap1 already exists.
mmcrsnapshot: Command failed. Examine previous error messages to determine cause.
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# mmcrsnapshot /dev/gpfs1 data1_snap32 <-- ÃÖ´ë 31°³±îÁö Á¦ÇѵǾî ÀÖ´Ù.
Cannot create a new snapshot until an existing one is deleted.
File system "gpfs1" has a limit of 31 online snapshots.
mmcrsnapshot: Command failed. Examine previous error messages to determine cause.
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½º³À¼¦Àº '/ÇØ´ç ÆÄÀϽýºÅÛ/.snapshots/½º³À¼¦¸í/'µð·ºÅ丮¿¡ »ý¼º(¿¹ : /data1/.snapshots/data1_snap1/)µÈ´Ù. ÀÌ µð·ºÅ丮¿Í ÆÄÀÏÀº rm¸í·ÉÀ¸·Î »èÁ¦µÇÁö ¾Ê´Â´Ù.
2. snapshot restore
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* Çü½Ä : mmrestorefs </dev/µð¹ÙÀ̽º¸í> <½º³À¼¦¸í>
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restoreÇϱâ À§Çؼ´Â ¹Ýµå½Ã ÆÄÀϽýºÅÛÀ» umountÇÑ ÈÄ ÁøÇàÇØ¾ß ÇÑ´Ù.
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# mmrestorefs /dev/gpfs1 data1_snap1
Restore snapshot data1_snap1 complete, err = 16
Cannot restore snapshot. "gpfs1" is mounted on 2 node(s) and in use on 2 node(s).
mmrestorefs: Command failed. Examine previous error messages to determine cause.
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umountÇÑ ÈÄ restore Çغ¸ÀÚ.
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# mmumount /data1
Thu Dec 29 18:06:15 KST 2011: mmumount: Unmounting file systems ...
# mmrestorefs /dev/gpfs1 data1_snap1
Restoring snapshot files...
Restore snapshot data1_snap1 complete, err = 0
# mmmount /data1
Thu Dec 29 18:06:46 KST 2011: mmmount: Mounting file systems ...
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