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wrc1944
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Joined: 15 Aug 2002
Posts: 3319
Location: Gainesville, Florida

PostPosted: Mon Jan 09, 2006 7:54 am    Post subject: Reply with quote

Thought I'd post a link to an update of the LinuxGazette File system tests- I was one of people who emailed Justin and asked him to re-run his great tests with a new kernel (He used 2.6.14.4 for these). Apparently, I guess he used a default ext3, not using the dir_index and data=writeback (or journal_data) modes. I just changed all my Gentoo boxes to ext3 from reiserfs (with the ext3 tweaks), so I'd really be interested in having his tests run with those ext3 options, and see if there is significant improvement.

http://linuxgazette.net/122/piszcz.html

More ext3 info at:
https://forums.gentoo.org/viewtopic-t-305871.html

These tweaks have worked very well on my boxes.
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ziggysquatch
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Joined: 16 Nov 2004
Posts: 172
Location: /USA/Minnesota

PostPosted: Wed Jan 11, 2006 3:45 am    Post subject: Reply with quote

I had the slowdown problem for apps starting up as this thread originally described. I checked the RAM and it was fine and I ran top and the CPU was hardly touched so I figured I would check out the solutions on this thread.

After reading about the reiserfs filesystem degradation problems that are the same as mine I started researching which filesystem to switch to. I used Ext3 before and was not impressed and that is why I used reiserfs as the main filesystem on my gentoo install. It was zippy at first but slowed down with time. My music partition uses XFS and I have had no problems with it so after researching and going around in circles with that research I decided that XFS was the most reliable and fastest (reading) filesystem I could choose.

The problem I had with XFS was that they say it is only worth it for large files but then I stumbled on someone who had formatted a partition and optimized XFS for average file sizes:
Code:
mkfs.xfs -d agcount=8 -l size=32m /dev/xxx


After backing up my / partition and formatting the partition to XFS with the optimizations and restoring / back I had an instant performance increase. Gentoo is just like new again.

I have a friend that is interested in switching his / partition to XFS as well but I told him to wait a couple of months to make sure that this fs does not suffer the degradation also. As for my music partition it has very little fragmentation on it after 9 months of constant writes to it.
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steveb
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Joined: 18 Sep 2002
Posts: 4564

PostPosted: Wed Jan 11, 2006 4:03 am    Post subject: Reply with quote

ziggyt7 wrote:
I had the slowdown problem for apps starting up as this thread originally described. I checked the RAM and it was fine and I ran top and the CPU was hardly touched so I figured I would check out the solutions on this thread.

After reading about the reiserfs filesystem degradation problems that are the same as mine I started researching which filesystem to switch to. I used Ext3 before and was not impressed and that is why I used reiserfs as the main filesystem on my gentoo install. It was zippy at first but slowed down with time. My music partition uses XFS and I have had no problems with it so after researching and going around in circles with that research I decided that XFS was the most reliable and fastest (reading) filesystem I could choose.

The problem I had with XFS was that they say it is only worth it for large files but then I stumbled on someone who had formatted a partition and optimized XFS for average file sizes:
Code:
mkfs.xfs -d agcount=8 -l size=32m /dev/xxx


After backing up my / partition and formatting the partition to XFS with the optimizations and restoring / back I had an instant performance increase. Gentoo is just like new again.

I have a friend that is interested in switching his / partition to XFS as well but I told him to wait a couple of months to make sure that this fs does not suffer the degradation also. As for my music partition it has very little fragmentation on it after 9 months of constant writes to it.


I use XFS everywhere where I can. Using the following mount options:
Code:
noatime,logbufs=8,logbsize=32768,ihashsize=65567


For defragmentation I use:
Code:
xfs_fsr


The only other FS I would use are:
  • JFS (using it on my laptop)
  • EXT3 (using it on some old i486/i586)


cheers

SteveB
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EASYdoor
Tux's lil' helper
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Joined: 21 Aug 2004
Posts: 79
Location: Novo mesto

PostPosted: Tue Mar 14, 2006 8:30 pm    Post subject: Reply with quote

i've heared that alot about JFS & laptops, can someone explain why is JFS so appropriate for laptops?
Currently i'm having reiserfs defrag nightmare as well & i'm deciding beten ext3, xfs, jfs...what do u suggest?
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revertex
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Joined: 23 Apr 2003
Posts: 806

PostPosted: Mon Mar 27, 2006 7:55 am    Post subject: Reply with quote

maybe NILFS could bring us some hope.
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