OK... I'll jump in... On 30/05/14 21:43, Josef Bacik wrote: > Hello, > > TL;DR: I want to only do snapshot-aware defrag on inodes in snapshots > that haven't changed since the snapshot was taken. Yay or nay (with a > reason why for nay)
[...] > > === Summary and what I need === > > Option 1: Only relink inodes that haven't changed since the snapshot was > taken. > > Pros: > -Faster > -Simpler > -Less duplicated code, uses existing functions for tricky operations so > less likely to introduce weird bugs. > > Cons: > -Could possibly lost some of the snapshot-awareness of the defrag. If > you just touch a file we would not do the relinking and you'd end up > with twice the space usage. [...] Obvious way to go for fast KISS. One question: Will option one mean that we always need to mount with noatime or read-only to allow snapshot defragging to do anything? Regards, Martin -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
