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From taorui <weilogs...@126.com>
Subject Re: selectively clear device disk cache?
Date Wed, 02 May 2012 15:57:47 GMT
Can this also be related with the hash ?

On Wed, 2012-05-02 at 08:00 -0700, John Plevyak wrote:
> 
> 
> Means that you have too few directory entries for that disk.   Odd,
> unless you are caching very small objects or have set the
> configuration for average object size too high.
> 
> 
> john
> 
> On Wed, May 2, 2012 at 7:37 AM, Bruce Lysik <blysik@yahoo.com> wrote:
>         Great, thanks for confirming that.  Back to the initial set of
>         messages for a moment:
>         
>         
>         [May  1 09:23:11.564] Server {0x2afe89312700} WARNING: cache
>         directory overflow on '/dev/sdd' segment 0, purging...
>         [May  1 09:23:11.565] Server {0x2afe89312700} WARNING: cache
>         directory overflow on '/dev/sdd' segment 0, purging...
>         
>         
>         
>         This sounds like something it would eventually recover from,
>         but we haven't seen these messages ever stop, once they do.
>          Can you shine some light on what's happening here?  ATS is
>         functioning properly in this situation, but load increases,
>         and eventually more cache directories get into this state.
>          
>         Sounds like something I should file a bug against?
>         
>         
>         Thanks for your assistance.
>         
>         
>         --
>         Bruce Z. Lysik <blysik@yahoo.com>
>         
>                 
>                 ______________________________________________________
>                 From: Leif Hedstrom <zwoop@apache.org>
>                 To: users@trafficserver.apache.org 
>                 Cc: Bruce Lysik <blysik@yahoo.com>; John Plevyak
>                 <jplevyak@gmail.com> 
>                 Sent: Wednesday, May 2, 2012 7:26 AM
>                 
>                 Subject: Re: selectively clear device disk cache?
>                 
>                 
>                 On 5/2/12 7:30 AM, Bruce Lysik wrote:
>                 > Thanks for that suggestion, John.  Objects aren't
>                 stored across cache devices, right?  If I clear a
>                 single disk cache, it has its own index, and I don't
>                 run the risk of putting the ATS server into some weird
>                 state, right?
>                 > 
>                 
>                 Correct. It's a strength, and a weakness. In some
>                 cases, a very large, popular file could benefit from
>                 spanning multiple disks, but we (currently) don't
>                 support that (afaik).
>                 
>                 -- leif
>                 
>                 
>                 
>                 
> 
> 




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