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Re: Poor interactive performance with I/O loads with fsync()ing

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From: Andi Kleen
Subject: Re: Poor interactive performance with I/O loads with fsync()ing
Date: Sunday, April 11, 2010 - 11:42 am

> XFS does not do much better. Just moved my VM images back to ext for

Did you move from XFS to ext3?  ext3 defaults to barriers off, XFS on,
which can make a big difference depending on the disk. You can
disable them on XFS too of course, with the known drawbacks.

XFS also typically needs some tuning to get reasonable log sizes.

My point was merely (before people chime in with counter examples) 
that XFS/btrfs/jfs don't suffer from the "need to sync all transactions for
every fsync" issue. There can (and will be) still other issues.

-Andi

-- 
ak@linux.intel.com -- Speaking for myself only.
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Messages in current thread:
Poor interactive performance with I/O loads with fsync()ing, Ben Gamari, (Tue Mar 16, 8:31 am)
Re: Poor interactive performance with I/O loads with fsync ..., tytso, (Tue Mar 16, 6:24 pm)
Re: Poor interactive performance with I/O loads with fsync ..., Ben Gamari, (Tue Mar 16, 8:18 pm)
Re: Poor interactive performance with I/O loads with fsync ..., tytso, (Tue Mar 16, 8:30 pm)
Re: Poor interactive performance with I/O loads with fsync ..., Ben Gamari, (Tue Mar 16, 9:31 pm)
Re: Poor interactive performance with I/O loads with fsync ..., Nick Piggin, (Tue Mar 16, 9:53 pm)
Re: Poor interactive performance with I/O loads with fsync ..., Ingo Molnar, (Wed Mar 17, 2:37 am)
Re: Poor interactive performance with I/O loads with fsync ..., Jesper Krogh, (Tue Mar 23, 12:51 pm)
Re: Poor interactive performance with I/O loads with fsync ..., Ben Gamari, (Thu Mar 25, 8:13 pm)
Re: Poor interactive performance with I/O loads with fsync ..., Ben Gamari, (Thu Mar 25, 8:16 pm)
Re: Poor interactive performance with I/O loads with fsync ..., Ben Gamari, (Thu Mar 25, 8:28 pm)
Re: Poor interactive performance with I/O loads with fsync ..., Ben Gamari, (Thu Mar 25, 8:31 pm)
Re: Poor interactive performance with I/O loads with fsync ..., Ben Gamari, (Sat Mar 27, 6:20 pm)
Re: Poor interactive performance with I/O loads with fsync ..., Ben Gamari, (Sat Mar 27, 6:29 pm)
Re: Poor interactive performance with I/O loads with fsync ..., Arjan van de Ven, (Sat Mar 27, 8:42 pm)
Re: Poor interactive performance with I/O loads with fsync ..., Ben Gamari, (Sun Mar 28, 7:06 am)
Re: Poor interactive performance with I/O loads with fsync ..., Andi Kleen, (Sun Mar 28, 3:08 pm)
Re: Poor interactive performance with I/O loads with fsync ..., Ben Gamari, (Fri Apr 9, 7:56 am)
Re: Poor interactive performance with I/O loads with fsync ..., Ben Gamari, (Fri Apr 9, 8:21 am)
Re: Poor interactive performance with I/O loads with fsync ..., Avi Kivity, (Sun Apr 11, 8:03 am)
Re: Poor interactive performance with I/O loads with fsync ..., Ben Gamari, (Sun Apr 11, 9:35 am)
Re: Poor interactive performance with I/O loads with fsync ..., Andi Kleen, (Sun Apr 11, 10:20 am)
Re: Poor interactive performance with I/O loads with fsync ..., Thomas Gleixner, (Sun Apr 11, 11:16 am)
Re: Poor interactive performance with I/O loads with fsync ..., Andi Kleen, (Sun Apr 11, 11:42 am)
Re: Poor interactive performance with I/O loads with fsync ..., Thomas Gleixner, (Sun Apr 11, 2:54 pm)
Re: Poor interactive performance with I/O loads with fsync ..., Hans-Peter Jansen, (Sun Apr 11, 4:43 pm)
Re: Poor interactive performance with I/O loads with fsync ..., Dave Chinner, (Sun Apr 11, 5:22 pm)
Re: Poor interactive performance with I/O loads with fsync ..., Ric Wheeler, (Wed Apr 14, 11:40 am)