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Re: [K12OSN] setting quotas per user to solve our slow login process



On Fri, 2009-09-11 at 12:38 -0400, Gideon Romm wrote:
> On Fri, 2009-09-11 at 10:25 -0400, Daniel Howard wrote:
> > Dan Young wrote:
> > > Sounds like:
> > > https://bugs.launchpad.net/ltsp/+bug/357268
> > >
> > > If you're not using localapps, you can test to see if this is the bug by:
> > >
> > > cd /opt/ltsp/i386/usr/share/ldm/rc.d/
> > > mv X01-localapps oldX01-localapps
> > >
> > > Then reboot your terminal.
> > Thanks Dan.  We tried it to no avail.  This seems like a bug because we 
> > switched a server back to K12LTSP and had 1000+ accounts up, no problem, 
> > boot up in seconds.  Unfortunately that is likely to be the solution for 
> > the time being until we can resolve the large number of accounts/slow 
> > bootup issue with K12Linux, or anyone can suggest other avenues for us 
> > to explore.  Thanks, Daniel
> 
> Daniel,
> 
> K12LTSP is based on LTSP5, which uses ssh to login to the server.  Can
> you test to see if running:  ssh -Y user server  from another box takes
> a long time?
> 
> If so, then add "-vvv" to the ssh command line, like:  ssh -vvv -Y
> user server
> 
> This will make ssh verbose and you will see at what point it hangs.  
> 
> By default, sshd on the server runs through several authentication
> mechanisms, and if it takes earlier/unused ones time to fail, you'll
> feel it.  You can optimize things by identifying the one that fails and
> turning it off in the sshd_config file.  A common one I have seen is:
> GSSAPIAuthentication
> 
> Sometimes, setting that to "no" will speed up ssh logins a great deal.
> 
> -Gadi
> 

Oops! I meant to say "K12Linux is based on LTSP5"

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