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chris
Asked: 2014-06-27 10:26:38 +0800 CST

is zfs snapshot -r of several pools atomic?

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Let's say I've got 2 zpools -- one with a database's database files and one with the database transaction logs.

If I do a zfs snapshot -r database@snapshot will the resulting snapshots all be taken at exactly the same time? Or will each pool's snapshot be internally consistent but they won't be consistent across pools?

zfs

1 Answers

  1. On systems based on the Illumos ZFS implementations which includes LibZFS_Core (eg Most of the OpenSolaris derivatives, the BSD implementations, and ZFSonLinux), Snapshots created with a single call (as a zfs snapshot -r ... call) are atomic, including syntax failure, corruption, or IO failure. Either all snapshots are created or none.

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