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Date: Fri, 26 Feb 2010 12:33:22 +0100 (CET) From: Karsten Weiss <K.Weiss@...ence-computing.de> To: linux-ext4@...r.kernel.org Subject: Re: Bad ext4 sync performance on 16 TB GPT partition On Fri, 26 Feb 2010, Karsten Weiss wrote: > However, the sync performance is fine if we ... > > * use xfs or > * disable the ext4 journal or > * disable ext4 extents (but with enabled journal) ext3 is okay, too: # /usr/bin/time bash -c "dd if=/dev/zero of=/mnt/large/10GB_1 bs=1M count=10000 && sync" 10000+0 records in 10000+0 records out 10485760000 bytes (10 GB) copied, 39.7188 seconds, 264 MB/s 0.03user 21.00system 1:47.24elapsed 19%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+0outputs (0major+788minor)pagefaults 0swaps Compare: XFS: 57s ext4: 7m26s -- Karsten Weiss -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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