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Hi Stephane, Andy's statement described a model that is used by Babar (and may be by WT2 in the future), that is, a backend tape (or tape like) system holds all data, and disk are just frontend cache. So if a storage node with disk is down, other nodes will server the request from jobs by fetching the data from tape backend. This may not be the case for you. I think so far the method described in Patrick McGain's respond is probably the best option to drain a storage node. regards, Wei Yang | [log in to unmask] | 650-926-3338(O) On Jan 19, 2012, at 1:36 PM, Stephane Willocq wrote: > Hi Andy, > > I was interested in your answer: > > On 1/9/12 3:41 AM, Andrew Hanushevsky wrote: >> P.S. The current model is that missing files from a faulty data server >> would be automatically copied in on other servers when so requested. >> That is a reasonable model is you assume that te ailure rate is >> relatively small. > > You mention an automatic copy to other servers can be requested. How do > we request this? > > > Stephane. > > >> On Sat, 7 Jan 2012, Doug Benjamin wrote: >> >>> Hello, >>> >>> Are there any xrootd commands to drain a faulty data server of files >>> and distribute them across the >>> rest of the data servers in the storage system. >>> >>> Thanks, >>> >>> Doug Benjamin >>> >>> ######################################################################## >>> Use REPLY-ALL to reply to list >>> >>> To unsubscribe from the XROOTD-L list, click the following link: >>> https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=XROOTD-L&A=1 >>> > > -- > ----------------------------------------------------------------- > Stephane Willocq Office (413) 545-0525 > Department of Physics Fax (413) 545-0648 > University of Massachusetts > 710 North Pleasant St [log in to unmask] > Amherst, MA 01003-9337 http://people.umass.edu/willocq > ----------------------------------------------------------------- > > ######################################################################## > Use REPLY-ALL to reply to list > > To unsubscribe from the XROOTD-L list, click the following link: > https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=XROOTD-L&A=1 ######################################################################## Use REPLY-ALL to reply to list To unsubscribe from the XROOTD-L list, click the following link: https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=XROOTD-L&A=1