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ã¯ããŒã³ã芪ããå®å šã«åå²ããŠããŠã2ã€ã®ãã¡ã€ã«ã·ã¹ãã ããªã³ã¯ããŠãæå³ããªãå ŽåããããŸãã ä»æ¥ãããè¡ãããã«ç§ãèããããšãã§ããå¯äžã®æ¹æ³ã¯ãzfs send / recvãå®è¡ããããšã§ãããããã«ã¯äžè²«æ§ã確ä¿ããããã«ããçšåºŠã®ããŠã³ã¿ã€ã ãå¿ èŠã«ãªãå¯èœæ§ããããŸãã
ç§ãææ¡ããŠããã®ã¯ãzfsã¯èŠªãã¡ã€ã«ã·ã¹ãã ã«é¢é£ä»ããããŠãããããã¯ãç¥ã£ãŠããã®ã§ããããã®ãããã¯ãæ°ããé åã«ã³ããŒãã代ããã«ãããã®ãããã¯ã䜿çšããããã«ã¯ããŒã³ãåæå®ããå¯èœæ§ããããšããããšã§ãïŒããŸãããã°ããããæ£ãã説æããŸããïŒã ãã¡ã€ã«ã·ã¹ãã ããªã³ã©ã€ã³ã§ã¢ã¯ãã£ããªéãçµäºç¶æ ã¯ã¹ããªããã¯ããŒã³ã«ãªããŸã...
zfs promote
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zfs promote clone-filesystem
Promotes a clone file system to no longer be dependent on its "ori
gin" snapshot. This makes it possible to destroy the file system
that the clone was created from. The clone parent-child dependency
relationship is reversed, so that the origin file system becomes a
clone of the specified file system.
The snapshot that was cloned, and any snapshots previous to this
snapshot, are now owned by the promoted clone. The space they use
moves from the origin file system to the promoted clone, so enough
space must be available to accommodate these snapshots. No new
space is consumed by this operation, but the space accounting is
adjusted. The promoted clone must not have any conflicting snapshot
names of its own. The rename subcommand can be used to rename any
conflicting snapshots.
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original @ snapshotã®ã¯ããŒã³ãäœæããåŸãããŒã¿ã»ãããšã¯ããŒã³ã®äž¡æ¹ãèªç±ã«å€æŽã§ããŸãããã£ã¹ã¯äžã®äž¡æ¹ã«å ±éã®ããŒã¿ãå ±æããããšãé€ããŠãçžäºã«åœ±é¿ã¯ãããŸããã
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å¯äžã®æ¬ ç¹ã¯ã original @ snapshot ïŒ=ã¯ããŒã³ã®ããŒã¹ïŒã«ä¿æãããŠãããã¹ãŠã®_unique_ããŒã¿ããã¯ããŒã³ãŸãã¯ïŒã¯ããŒã³ã®ããã¢ãŒãåŸïŒãªãªãžãã«ãç Žæ£ããææããªãéã解æŸã§ããªãããšã§ãã
@ greg-hydrogenã¯ãæçµçã«zfs promote
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@behlendorf ïŒããã¯ã»ãŒç¢ºå®ã«ããŒãºãæºãããŠããŸããã
http://jrs-s.net/2017/03/15/zfs-clones-probably-not-what-you-really-want/
åé¡ãããŸã説æããŸãã
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user @ backup ïŒ
zfs snapshot backup/prod<strong i="11">@20170901</strong>
zfs send -R backup/prod<strong i="12">@20170901</strong> | ssh test zfs recv ... test/mirror
user @ test ïŒ
zfs clone test/mirror<strong i="23">@20170901</strong> test/sanitizing
sanitize sanitizing
zfs snapshot test/sanitizing<strong i="24">@sanitized</strong>
zfs clone test/sanitizing<strong i="25">@sanitized</strong> test/test
dirty test/test
user @ backup ïŒ
dirty prod/prod
zfs snapshot backup/prod<strong i="35">@20170908</strong>
zfs send -I backup/prod<strong i="36">@20170901</strong> backup/prod<strong i="37">@20170908</strong> | ssh test zfs recv test/mirror
zfs destroy backup/prod<strong i="38">@20170901</strong>
user @ test ïŒ
test/mirror@20170908
ãštest/test
ïŒã®åç¹ã§ããtest/mirror@20170901
ãæ®ã£ãŠããŸããtest/mirror@20170908
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Fwiwããããå³ããããã«...ïŒ
zfs list -t all -o used,refer,name,origin -r test/mirror test/test
USED REFER NAME ORIGIN
161G 1.57M test/mirror -
65G 82.8G test/mirror<strong i="54">@2017081710</strong> -
0 82.4G test/mirror<strong i="55">@201709141737</strong> -
3.25G 82.8G test/test test/mirror<strong i="56">@2017081710</strong>
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ããã§ã zfs send | zfs recv
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kvm/vmimages
kvm/vmimages<strong i="11">@snap1</strong>
kvm/vmimages<strong i="12">@snap2</strong>
kvm/vmimages<strong i="13">@snap3</strong>
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kvm/vmimages<strong i="20">@snap1</strong>
kvm/vmimages<strong i="21">@snap2</strong>
kvm/vmimages<strong i="22">@snap3</strong>
kvm/restored # it is a clone of snap3
kvm/restored<strong i="23">@snap1</strong>
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