|| ||"Jeffrey W. Baker" <firstname.lastname@example.org>|
|| ||email@example.com, firstname.lastname@example.org,
|| ||ZFS, XFS, and EXT4 compared|
|| ||Wed, 29 Aug 2007 23:16:51 -0700|
I have a lot of people whispering "zfs" in my virtual ear these days,
and at the same time I have an irrational attachment to xfs based
entirely on its lack of the 32000 subdirectory limit. I'm not afraid of
ext4's newness, since really a lot of that stuff has been in Lustre for
years. So a-benchmarking I went. Results at the bottom:
Short version: ext4 is awesome. zfs has absurdly fast metadata
operations but falls apart on sequential transfer. xfs has great
sequential transfer but really bad metadata ops, like 3 minutes to tar
up the kernel.
It would be nice if mke2fs would copy xfs's code for optimal layout on a
software raid. The mkfs defaults and the mdadm defaults interact badly.
Postmark is somewhat bogus benchmark with some obvious quantization