Print

Print


Hi Derek,

Quite correct in your assesment. The opaque information is not being removed 
prior to forwading. I will look into this.

Andy

----- Original Message ----- 
From: "Derek Feichtinger" <[log in to unmask]>
To: "xrootd mailing list" <[log in to unmask]>
Sent: Monday, April 25, 2005 7:36 AM
Subject: olbd fails to learn when a file disappears from a leaf node, but 
another copy still exists


> Hi,
>
> I tested whether this problem had been corrected in the development 
> release
> 20050417-0431.
> (original submission:
> http://www.slac.stanford.edu/cgi-bin/lwgate/XROOTD-L/archives/xrootd-l.200504/Author/article-23.html)
>
> It still fails, but with other symptoms.
>
> Setup:
> 1. Two leaf nodes. Both have the file fileA
>
> 2. Reading via the redirector gives me alternatively fileA from leaf1 and
> leaf2.
>
> 3. I remove fileA from leaf1.
>
> 4. When a client request gets redirected to leaf1, the client now 
> correctly
> connects back to the manager, who should do an update of this cache entry.
> The master sends out a stat request to the slaves like this:
>           statf  /tmp/xrootd/all_1&tried=leaf1
> But the node that still has the file seems not to respond in the 
> affirmative,
> and it seems the cache is not updated, because...
>
> 5. I'm left with a system that alternately succeeds (from leaf2) and fails
> (via the above route) giving me the file.
>
> Cheers,
> Derek
>
> -- 
> Dr. Derek Feichtinger                   Tel:   +41 22 767 10 07
> LCG/ARDA Group                            email: [log in to unmask]
> CERN 
> http://people.web.psi.ch/feichtinger
> CH-1211 Genève 23
>
>
>