On Mon, 27 May 2013, "Trent W. Buck" <[email protected]> wrote:
> This happened because ext4's default write delay was a lot longer than
> ext3's default, which led to data loss in unusual cases, and the
> increased syncing dpkg added to deal with that ran into serious
> performance issues on btrfs.

My bug report that you reference only mentions Ext4.  But when I found the bug 
in rpm I was using XFS.  My main concern at the time was with the way XFS 
works, but I didn't want people to get too focussed on one filesystem, I was 
afraid someone would say "just don't use XFS for the root fs then".

> In Debian 7 you can add force-unsafe-io to dpkg.cfg to turn off some of
> these syncs; using eatmydata (LD_PRELOAD wrapper than noops sync
> syscalls) makes it slightly faster still, and works on Debian 6 and
> Ubuntu 10.04.
> 
> http://bugs.debian.org/430958 is the bug you're referring to?
> http://bugs.debian.org/575891 is mine :-)


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