Re: HPSS configuration for GCMDC2

[Luis Bernardo <bernardo@math.lbl.gov>]

On Mon, 22 Mar 1999, Arie Shoshani wrote:

> > Regarding the HPSS configuration for MDC2 the proposed configuration is:
> > 
> > File purging policy:
> > Do not purge any file which has been accessed in the last 5 minutes
> > Start purge when the cache is 5% full.
> > Stop purge when the cache is empty.
> 
> If we want to empty the HPSS cache between runs, then "start purge"
> should be done when the cache is 0% full, or as close to it as
> possible.  As I recall from MDC1 the smallest % possible was 1%.
> 
> As for the length of time before purging, the longer the better during
> runs, but we need this figure to be low, so that the cache empties
> between runs.  I guess we can make this 10 minutes, so that files that
> will potentially be shared will stay in cache longer.  This means that
> we'll have to wait 10 minutes between runs.  Henrik, Luis: what do you
> think?
> 

10 or 20 minutes should be ok. But it would be very important that we
could check that using Sammy. So the people that used Sammy last time
should relearn how to use it.

Luis