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Hi Tommaso,
> I have used a simple configurations, attached in the end.
> (By the way, I cannot find anywhere libFileCache.so, do you know in 
> which RPM it lives?)

The file disk-cache library name  is libXrdFileCache. It is in 
xrootd-server-libs RPM.

Alja

>
> tom
>
>
> config:
>
> bash-4.1# cat xrootd-proxy.cfg
> # Tell everyone who the manager is
> #
> all.manager 127.0.0.1:1213 <http://127.0.0.1:1213>
> # Everyone will export /data red-only with the stage option. The stage
> # option requests that if the file isn’t found in the cluster the
> # redirector should send the client to a PFC server with enough space to
> # cache the file.
> #
> all.export /store stage r/o
> # First configure the redirector cmsd/xrootd using if-else-fi. However,
> # the server cmsd configuration differs from that for the xrootd.
> # So, we break those out in the if-else-fi clauses.
> #
> if redirector
> all.role manager
> # Server’s cmsd configuration – all PFC’s are virtual data servers
> #
> else if exec cmsd
> all.role server
> # The cmsd uses the standard oss plug-in but needs a specialized stat
> # plugin to locate files in the cache. Also, the oss plug-in must be
> # told where the cache is actually located via the space directive.
> #
> oss.statlib /usr/lib64/libXrdPss-4.so
> oss.space public /data/xrootd-cache
> # Server’s xrootd configuration – all PFC’s are virtual data servers
> #
> else
> all.role server
> # For xrootd, load the proxy plugin and the disk caching plugin.
> #
> ofs.osslib  /usr/lib64/libXrdPss-4.so
> pss.cachelib libFileCache.so
> # Tell the proxy where the data is coming from (arbitrary).
> #
> pss.origin xrootd-cms.infn.it:1194 <http://xrootd-cms.infn.it:1194>
> # Tell the PFC’s where the disk cache resides (arbitrary).
> #
> pfc.cachedir /data/xrootd-cache
> fi
>
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