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Hi Artem! Poeple are asking if we can make dCache talk the xrootd protocol. Just as an experiment we would like to have a small xrootd instance in front of our tape based dCache instance so that we can run standard xrootd applications agains the xrootd/dCache. dCache Team, DESY Artem Trunov wrote: >Hi, Volodymyr! > >I can't say about your problem, but was curiouse about your application - >why are you trying to organize such a configuration? It would seem that >either xrootd or dCache is enough to access the data. I am especially >curious, because we at in2p3 have both dCache and xrootd, but those two >pools don't communicate with each other. > >Thanks, >Artem. > > > >On Fri, 16 Sep 2005, Volodymyr Kapchynskyy wrote: > > > >>Hi XRootd Community, >> >>We here at DESY were working on interfacing XRootd with dCache. >>Currently we need the stage-in capability from dCache (which in this >>case is MSS) into XRootd local folder. >>And also we need a Migration tool from XRootd local folder into MSS >>(dCache). We use the oss.msgwcmd and >>oss.stagecmd directives. Also the oss.rcreate directive is set. Well, >>whenever the StageIn command is called everything works >>fine and the files are staged ok. But we have some problems with >>Flushing files to MSS. >>Calling "msstalk create mssfn mode" in the most straightforward way does >>not work. >>It seems to us that >>1. The "create" command is called BEFORE the actual file was written >>into the local folder by xrdcp. So there is nothing to flush. >>2. It is kind of unknown when the file should be start to being flushed. >>3. "create" should first touch the file on MSS, return "0" saying that >>evrything is ok and then it can actually flush the file. Otherwise the >>flushing does not work. >> >>So we wonder how actually the create should function and how it should >>communicate with XRootd? >>What kind of logic should be behind the implementation of create part of >>oss.mssgwcmd command? >> >>Volodymyr Kapchynskyy, >>DESY >> >> >>