[ale] firefox s_l_o_w over nfs mounted /home

[Jim Kinney]

Changed autofs to use async for the NFS mounts and performance improved
250%. Users are happy (for now. They'll ask for bigger, faster, more in
a day or so).
On Wed, 2015-09-30 at 14:06 -0400, Scott Bragg wrote:
> Sounds like significant drop in performance for large numbers of
> small file writes.  Are you using async writes?   If I remember my
> nfs tuning params, sync writes send a confirm for each file written
> and if you're writing a lot of tiny files, it slows things
> significantly.   Once I get a break from the wonderful fun of
> PowerDNS (/sarc) I'll dig into some of the nfs tuning and see what I
> can find.    Beyond that, normal disk and filesystem tuning for the
> types / sizes of file writes as well as possibly moving the dot files
> and temp dirs off the nfs and onto the local workstation 
>  (/tmp/usr/.xyz  instead of /home/user/.xyz for instance) might help
> at least troubleshoot.  
> 
> Scott
> 
> 
> On Wed, Sep 30, 2015 at 1:24 PM, Jim Kinney <jim.kinney at gmail.com>
> wrote:
> > everything BUT firefox and Matlab are OK. Both are heavy writers to
> > dotfiles :-(
> > 
> > nfstat values are OK. As expected it varies throughout the day
> > based on building usage.
> > 
> > On Wed, 2015-09-30 at 13:19 -0400, Scott Bragg wrote:
> > > What kind of response rates do you get locally to that nfs mount?
> > > 
> > > On Wed, Sep 30, 2015 at 1:12 PM, Jim Kinney <jim.kinney at gmail.com
> > > > wrote:
> > > > I'm 99% certain that the 2-5 minute page load is due to the
> > > > caching process and the mostly crappy bandwidth between my
> > > > users and where their /home is sourced. So I disabled caching
> > > > as a test. No change.
> > > > 
> > > > I've checked DNS and it returns fast. Any other ideas to speed
> > > > things up?
> > > > -- 
> > > > James P. Kinney III
> > > > 
> > > > Every time you stop a school, you will have to build a jail.
> > > > What you
> > > > gain at one end you lose at the other. It's like feeding a dog
> > > > on his
> > > > own tail. It won't fatten the dog.
> > > > - Speech 11/23/1900 Mark Twain
> > > > 
> > > > http://heretothereideas.blogspot.com/
> > > > 
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> > -- 
> > James P. Kinney III
> > 
> > Every time you stop a school, you will have to build a jail. What
> > you
> > gain at one end you lose at the other. It's like feeding a dog on
> > his
> > own tail. It won't fatten the dog.
> > - Speech 11/23/1900 Mark Twain
> > 
> > http://heretothereideas.blogspot.com/
> > 
> > _______________________________________________
> > Ale mailing list
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> > http://mail.ale.org/mailman/listinfo/ale
> > See JOBS, ANNOUNCE and SCHOOLS lists at
> > http://mail.ale.org/mailman/listinfo
> > 
> _______________________________________________
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-- 
James P. Kinney III

Every time you stop a school, you will have to build a jail. What you
gain at one end you lose at the other. It's like feeding a dog on his
own tail. It won't fatten the dog.
- Speech 11/23/1900 Mark Twain

http://heretothereideas.blogspot.com/

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