On Thu, 2015-11-26 at 16:52 +0000, Duncan wrote: > For people doing snapshotting in particular, atime updates can be a > big > part of the differences between snapshots, so it's particularly > important > to set noatime if you're snapshotting. What everything happens when that is left at relatime? I'd guess that obviously everytime the atime is updated there will be some CoW, but only on meta-data blocks, right? Does this then lead to fragmentation problems in the meta-data block groups? And how serious are the effects on space that is eaten up... say I have n snapshots and access all of their files... then I'd probably get n times the metadata, right? Which would sound quite dramatic... Or is just parts of the metadate copied with new atimes? Thanks, Chris.
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