On 01/02/12 14:49, Sam Skipsey wrote:
> I'm not sure how often you restart your squid, but we've not needed to
> restart it in some time, so I guess we've not hit this problem. (Yes,
> our squid is set to do that, like all Frontier squids. The last time it
> was restarted, it didn't seem to break anything in CVMFS, though, so
> anecdotally...)
What might it break?
Become less efficient for a while, yes, but break?
Like anyone else, we only restart our squid for kernel updates.
Chris
>
> Sam
>
> On 1 February 2012 14:44, John Bland <[log in to unmask]
> <mailto:[log in to unmask]>> wrote:
>
> Maybe our Frontier is out of date or something but its startup
> script wipes the caches every time it is run. How does that fit in
> with a CVMFS cache? Are you wiping your CVMFS cache every time squid
> is restarted?
>
> John
>
>
> On 01/02/2012 14:34, Mark Slater wrote:
>
> Hiya,
>
> I did exactly as Sam says for Bham when setting up CVMFS: Just
> about to put
> in a new SQUID server for it then realised I could probably get
> away with
> just using the Frontier one :) Not had any problems so far (with
> that at
> least...)!
>
> Thanks,
>
> Mark
>
>
> On 31/01/2012 20:36, Sam Skipsey wrote:
>
> Certainly, we run a combined CVMFS/ATLAS Frontier squid at
> Glasgow, with
> no problems at all.
>
> I think that most sites with a Frontier squid added CVMFS to
> that rather
> than commissioning a new one, so I suspect we're not unusual
> in this.
>
> Sam
>
> On 31 January 2012 19:19, Alastair Dewhurst
> <[log in to unmask] <mailto:[log in to unmask]>
> <mailto:[log in to unmask]
> <mailto:[log in to unmask]>>> wrote:
>
> Hello
>
> I think that most sites have squids of some type (be it
> for cvmfs or
> Frontier for ATLAS, CMS, or LHCb). Many sites (not just
> in the UK)
> have wondered if it is possible to combine these squids
> and from a
> load point of view this should be fine. However having
> not done this
> myself (as the Tier 1 keeps all it's services separate
> for the moment)
> I don't feel like I am in a good position to advise other
> sites what
> to do.
>
> Therefore if anyone has tried sharing ATLAS and CMS
> Frontier squids,
> sharing Frontier and CVMFS squids or doing anything
> cunning with
> failover should their primary squid go wrong I would be
> interested to
> hear. I will be putting the useful information I compile
> on to a WLCG
> twiki page. Even if you tried things and it didn't work
> it may still
> be a useful starting point. ATLAS have asked me to test
> this so I am
> trying to learn from other peoples mistakes first!
>
> Thanks
>
> Alastair
>
>
>
>
>
> --
> John Bland [log in to unmask]
> <mailto:[log in to unmask]>
> System Administrator office: 220
> High Energy Physics Division tel (int): 42911
> Oliver Lodge Laboratory tel (ext): +44 (0)151 794 2911
> <tel:%2B44%20%280%29151%20794%202911>
> University of Liverpool http://www.liv.ac.uk/physics/__hep/
> <http://www.liv.ac.uk/physics/hep/>
> "I canna change the laws of physics, Captain!"
>
>
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