Hi Wilko,

many thanks for advice. With directive oss.check client is redirected to
other node and staging of requested file is started.
I have some other questions, if you can help me, it will be super.

I want to stage a file from HPSS for example with path like:
/home/starreco/reco/productionHigh/FullField/P04ik/2004/040/st_physics_
5040131_raw_2010003.MuDst.root

and copy to path /data0 or /data1 or /data2 or /data3 which I've
specified with directives:

oss.path /data0 dread nomig stage
oss.path /data1 dread nomig stage
oss.path /data2 dread nomig stage
oss.path /data3 dread nomig stage

My question is if my thoughts are right and file with HPPS path:

/home/starreco/reco/productionHigh/FullField/P04ik/2004/040/st_physics_
5040131_raw_2010003.MuDst.root

will be staged to local path:

/data0/home/starreco/reco/productionHigh/FullField/P04ik/2004/040/st_ph
ysics_5040131_raw_2010003.MuDst.root
i.e that /data0 is path to ve pre-pended to local path. Or is there some
other directive, which can help me to do that ?

My second question is if I need to have specified oss.mssgwcmd command
when I don't plan to migrate any files from local disk to HPSS ? 

The third question is about oss.cache directive. Can I have the location
of cache in the same directory as I have the files to export ?
For example, I have all files in directories:
/data0, /data1, /data2 or /data3 (i export with directive xrootd.export)
and can I have a oss.cache /data*.

My fourth problem is with oss.path again, I've specified this:
oss.path /data0 dread nomig stage
oss.path /data1 dread nomig stage
oss.path /data2 dread nomig stage
oss.path /data3 dread nomig stage

but in log file is this:
oss.path /data3 r/o  check dread mig nomkeep nomlock nommap norcreate
stage
oss.path /data2 r/o  check dread mig nomkeep nomlock nommap norcreate
stage
oss.path /data1 r/o  check dread mig nomkeep nomlock nommap norcreate
stage
oss.path /data0 r/o  check dread mig nomkeep nomlock nommap norcreate
stage

as you can see with mig directive and in addation is here a line:

oss.path / r/o  check dread mig nomkeep nomlock nommap norcreate stage

Is this correct ? Becaouse I dont want to stage any files to path /. (Or
is needed due to that / is parent directory ?)

Thank you
Pavel

On Tue, 12 Jul 2005 20:46:20 -0700 (PDT)
Wilko Kroeger <[log in to unmask]> wrote:

> 
> Hello Pavel
> 
> I suspect that this is a problem with the mss configuration. In the
> dev. version the mss command is ignored if the path is only stage-able
> and  nodread, nocheck, nomig are specified.
> Do you see in the xrdlog file the line
>   mssgwcmd ignored; no MSS paths present.
> from the xrootd startup ?
> 
> If this is the case you could add
> oss.check
> to your config which should cause xrootd to use the mssgwcmd command.
> (oss.dread ot oss.rcreate should also do the trick). But if you
> specify any of these options xrootd will behave a little bit different
> from how it is configured now.
> 
> The problem has been fixed in CVS and will be in the next release.
> 
> 
> Cheers,
>    Wilko
> 
> 
> 
> 
> 
> On Tue, 12 Jul 2005, Pavel Jakl wrote:
> 
> > Hi for some time,
> >
> > Firstly, we've installed the latest development version of xrootd on
> > 100 nodes (1 redirector + 1 supervisor + 98 dataservers) with the
> > support of open load balancing and everything is working great and
> > super. I would like to say, brilliant work.
> >
> > To my problem, I want to enable the MSS interface. We've implemented
> > scripts for performing meta-data operations and staging files from
> > HPSS. (directives oss.mssgwcmd, oss.stagecmd). I 've inserted
> > everything in config file for dataserver and tried to obtain a file
> > from HPSS. In redirector log I found this error message:
> >
> >  050712 19:35:48 18366 odc_Locate: starlib.10447:13@rcas6230 given
> >  error msg 'No servers are available to read the file.' by xrdstar
> >  path=/home/starreco/reco/productionHigh/FullField/P04ik/2004/040/s
> >  t_physics_5040131_raw_2010003.MuDst.root
> >
> > and found out that scripts was not even called once time. (this I
> > know from debug support of my script). My question is, if I have
> > something wrong in my configuration file or I forgot something to
> > add or I skiped something in reading of documentation.
> >
> > I am enclosing a configuration file for dataserver.
> >
> > Thank you for any advice
> > Pavel
> >
> >
> >