ZFS features not currently in btrfs
Posted Jul 14, 2012 11:32 UTC (Sat) by Tobu
In reply to: ZFS features not currently in btrfs
Parent article: Btrfs send/receive
ZIL/SLOG is part of the bcache featureset. bcache can be a write-through cache, which only improves read performance, or a writeback cache, which makes post-SSD write io sequential. Another advantage of bcache is that it is persistent, unlike the ZFS read cache (L2ARC). That allows bcache to speed up booting.
The raid5 write hole exists when btrfs is layered over md raid. When btrfs' parity raid implementation lands, it will probably use the same technique as raid-z (overwriting entire stripes instead of patching them).
I don't think you held back on listing zfs advantages over btrfs, this was the second newest zfs article on your blog.
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