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Date: Fri, 2 Mar 2012 15:16:12 +0100 From: Jacek Luczak <difrost.kernel@...il.com> To: Chris Mason <chris.mason@...cle.com>, Jacek Luczak <difrost.kernel@...il.com>, Theodore Tso <tytso@....edu>, linux-ext4@...r.kernel.org, linux-fsdevel <linux-fsdevel@...r.kernel.org>, LKML <linux-kernel@...r.kernel.org>, linux-btrfs@...r.kernel.org Subject: Re: getdents - ext4 vs btrfs performance 2012/3/2 Chris Mason <chris.mason@...cle.com>: > On Fri, Mar 02, 2012 at 11:05:56AM +0100, Jacek Luczak wrote: >> >> I've took both on tests. The subject is acp and spd_readdir used with >> tar, all on ext4: >> 1) acp: http://91.234.146.107/~difrost/seekwatcher/acp_ext4.png >> 2) spd_readdir: http://91.234.146.107/~difrost/seekwatcher/tar_ext4_readir.png >> 3) both: http://91.234.146.107/~difrost/seekwatcher/acp_vs_spd_ext4.png >> >> The acp looks much better than spd_readdir but directory copy with >> spd_readdir decreased to 52m 39sec (30 min less). > > Do you have stats on how big these files are, and how fragmented they > are? For acp and spd to give us this, I think something has gone wrong > at writeback time (creating individual fragmented files). How big? Which files? -Jacek -- 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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