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On 8/19/19 4:31 PM, Michal Kamil Simon wrote: > Hi Adrian, > > Number of chunks is not the same thing as the -S|--streams option > from xrdcp. > > Number of parallel chunks is set via XRD_CPPARALLELCHUNKS, > Number of streams is set via XRD_SUBSTREAMSPERCHANNEL. ok, then, looking at https://github.com/xrootd/xrootd/blob/master/bindings/python/libs/client/copyprocess.py#L73 means that the python bindings does not have the streams option .. should i create a issue? Thanks a lot! Adrian > Number of chunks means how many in-fly data-chunks we can have > per channel. Number of streams means how many physical tcp connections > we have per channel. > Number of sources is the maximum number of sources (data servers) > that will be used for extreme-copy. Of course each data source will have its > own communication channel, so 'chunks' and 'streams' are per source. > > As we use non-block I/O neither adding sources, streams nor chunks will > create new threads. > > I hope that helps. Don't hesitate to ask if you need more clarification on this > subject! > > Cheers, > Michal > ________________________________________ > From: Adrian Sevcenco > Sent: 17 August 2019 13:20 > To: [log in to unmask]; Michal Kamil Simon > Subject: python chunks and xrdcp streams equivalent? > > Hi! Is the chunks number (from python bindings) and the -S|--streams > from xrdcp the same thing? > > moreover, will this multiply with the number of sources? > so, with chunks=4 and sources=2, there will be 8 download threads (per > file)? > > Thank you! > Adrian > ######################################################################## 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