[Port-solaris] RE: [OpenAFS] mkdir() performance on AFS client

[Robert Milkowski]

> -----Original Message-----
> From: Simon Wilkinson [mailto:simonxwilkinson@gmail.com]
> Sent: 23 January 2014 11:44
> To: milek@task.gda.pl
> Cc: openafs-info@openafs.org Info; port-solaris@openafs.org
> Subject: Re: [OpenAFS] mkdir() performance on AFS client
> 
> 
> On 23 Jan 2014, at 11:37, <milek@task.gda.pl> <milek@task.gda.pl>
> wrote:
> > Recently I came across an issue where 'make install' which was
> > installing software to AFS was taking *much* more time on a Solaris
> > client than on Linux client. The issue turned out to be a lack of
> > optimization on VFS layer in Solaris, and VOP_MKDIR in AFS isn't
> > optimized for it either (on Linux it doesn't have to be). This can be
> > mitigated though by changing default setting for AFS file server.
> 
> The real question here is how widely we should be applying the abort
> threshold - should it apply to all aborts sent to a particular client,
> or should we be more selective? There are a lot of competing views
> here, as it depends on what you believe the abort threshold is actually
> protecting us against.
> 

I'm actually not convinced this throttling mechanism is needed (I know it
can be disabled, and perhaps this should be default or the threshold should
be set to a much higher value by default) - AFAIK NFS, CIFS, ... do not have
an equivalent and yet they work fine.


Best regards,
 Robert Milkowski