[Bioclusters] NFS performance with multiple clients.

[Joe Landman]

Hi Lucas:

  These are some knobs that you can tweak for 2.4 kernels.  For 2.6 
kernels, people are still learning, though there are some interesting IO 
schedulers you can use.

I found the following works well (about 10% better than default values) 
for one of my systems (in /etc/sysctl.conf)

    vm.max-readahead=384
    vm.min-readahead=8

There are lots of other tunables in the kernel.  Just beware that some 
of them can break your systems.

Joe



Lucas Carey wrote:

>If its not too much work, I'd like to bug you for these Joe. Additionally, does anyone have any experience with Luster or any other parallel filesystems? Is it possible to run GPFS on non-IBM systems -- are they selling it?
>
>-Lucas
>
>On Wednesday, November 24, 2004 at 09:50 -0500, Joe Landman wrote:
>  
>
>>Third, there are a number of kernel tunables that can improve the disk 
>>IO performance.  If you bug me, I can find a link for you.
>>
>>
>>You can also look at alternative architecture disks, or server mods.  If 
>>you contact me offline, I can give you some ideas.
>>
>>    
>>
>_______________________________________________
>Bioclusters maillist  -  Bioclusters at bioinformatics.org
>https://bioinformatics.org/mailman/listinfo/bioclusters
>  
>

-- 
Joseph Landman, Ph.D
Founder and CEO
Scalable Informatics LLC,
email: landman at scalableinformatics.com
web  : http://www.scalableinformatics.com
phone: +1 734 612 4615