[SGVLUG] FW: Video server

[Matt Campbell]

Wow.  She sent me the data from her talk, Ext2 didn't do too bad in the
comparison.

Check out slide 55 at
http://www.slideshare.net/selenamarie/what-assumptions-make-filesystem-io-fr
om-a-database-perspective

Their performance data for a 2 disk RAID shows that Ext2 delivered twice the
performance of Ext3 in sequential writes and topped both XFS and Ext4 by
30%.  It held its own in sequential reads with XFS and was better than Ext4.
When you get into a database environment with read-write or random read
performance the same data shows ext2 still holds up well.  It looks like the
'off the cuff' advice I got from this group before I started the project was
right on the money.

Single disk data is shown on slide 50 and ext3 shines.  For 1 disk XFS and
Ext4 also outperform Ext2 in sequential reads and writes.

Slides 65-68 show Ext2's superiority over XFS and Ext4 for sequential reads
and writes.  It doesn't work nearly as well for random access.

Other notes:
Slide 80 - hardware RAID dies with Ext3 and XFS
Slide 81 - Ext2 and Ext3 SUCK CPU when using software RAID

Thanks for the contact Matti!

Slide 
Matt

> -----Original Message-----
> From: sgvlug-bounces at sgvlug.net [mailto:sgvlug-bounces at sgvlug.net] On
> Behalf Of matti
> Sent: Wednesday, April 15, 2009 6:53 PM
> To: SGVLUG Discussion List.
> Subject: Re: [SGVLUG] FW: Video server
> 
> 
> 
> 
> > I talked to a number of people and the recommendation had
> > been to avoid ext3
> > with large static files as the journaling would slow down
> > performance.  It
> > sounds like you disagree.  Where do you go to find a
> > good performance
> > comparison of the various FSs?
> >
> > Matt
> 
> fyi -
> 
> this session had some very interesting information...
> while postgres based, it should be worth asking
> Selena for the notes ...
> 
> http://scale7x.socallinuxexpo.org/conference-info/speakers/selena-
> deckelmann
> 
> iirc she compared several file systems.
> 
> hmmm... I don't recall if I got her email,
> i'm guessing with a bit of digging..
> ah,... here's her blog
> 
> http://www.chesnok.com/daily/
> 
> best
> matti
> 
> 
> 
> 
>