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I did something similar once, but I believe that skipped trying to copy via the redirector and instead copied directly to other data servers. This not only skips the renaming step, it avoids the redirector's penalty of verifying that the destination file does not exist. If there is enough space you can round-robin among the remaining dataservers. The only other caveat would be if you need to be concerned with supporting Named spaces (i.e. space tokens). If so, you will need to include the proper opaque information in the xrdcp command. Patrick On 01/12/2012 03:34 PM, Yang, Wei wrote: > Wilko just told me that this won't work --- because your data server is still in the xrootd cluster and redirector will send you back to the data server that you want to drain. A slightly modify way will work: > > xrdcp file root://redirector//file.TMP > use xrd to rename root://redirector//file.TMP to root://redirector//file > > regards, > Wei Yang | [log in to unmask] | 650-926-3338(O) > > > On Jan 12, 2012, at 12:15 PM, Yang, Wei wrote: > >> Hi Nate, >> >> You can use cms.space directive set the minimum required free space to, say 1000PB and restart cmsd/xrootd. Your redirector will then think that this data server run out of space and will not send future writing to it. After than you can drain your data server. >> >> Another way to do this is to set r/o in all.export >> >> regards, >> Wei Yang | [log in to unmask] | 650-926-3338(O) >> >> >> On Jan 12, 2012, at 11:46 AM, Nathan Yehle wrote: >> >>> Wei, >>> >>> Is there a way to drain an xrootd server without bringing it offline? (stopping xrootd/cmsd on a production server is not an option unfortunately) >>> >>> -Nate >>> >>> On Jan 9, 2012, at 3:04 AM, Yang, Wei wrote: >>> >>>> Here is another way to do this, on the "faulty" data sever (obviously, it can't be complete faulty, otherwise you can't login and do anything) >>>> >>>> stop xrootd/cmsd >>>> find storage_root_path -type f | while read file; do >>>> dstfile=`remove local_root from $file` >>>> xrdcp $file root://your_redirector/$dstfile >>>> done >>>> >>>> you can speed up the process by making a more sophisticated script using xprep, etc. >>>> >>>> regards, >>>> Wei Yang | [log in to unmask] | 650-926-3338(O) >>>> >>>> >>>> >>>> >>>> On Jan 9, 2012, at 12:41 AM, Andrew Hanushevsky wrote: >>>> >>>>> Hi Doug, >>>>> >>>>> The short answer is no. On the positive side, we will submit an ASCR >>>>> proposal to allow that. >>>>> >>>>> Andy >>>>> >>>>> 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. >>>>> >>>>> 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 >>>>>> >>>>> >>>>> ######################################################################## >>>>> 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 >>> >> >> ######################################################################## >> 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 ######################################################################## 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