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I did some **100GE** benchmarks and I notice the following when comparing parallel sockets vs extreme copy. The single stream copy : ``` [root@node]# time xrdcp -y 1 e.meta4 /dev/null -f [9.766GB/9.766GB][100%][==================================================][2.441GB/s] real 0m4.887s user 0m1.523s sys 0m4.945s ``` The parallel socket implementation using 10 sockets: ``` [root@node]# time xrdcp -S 10 e.meta4 /dev/null -f [9.766GB/9.766GB][100%][==================================================][1.953GB/s] real 0m4.964s user 0m1.688s sys 0m4.998s ``` An extreme copy by using 10 named connections to the same xrootd server: ``` [root@node]# time xrdcp -y 10 e.meta4 /dev/null -f [9.766GB/9.766GB][100%][==================================================][9.766GB/s] real 0m0.947s user 0m2.685s sys 0m7.357s ``` It is fantastic, that I can run a single copy with 10 GB/s but I have to do some gymnastic to get this, while the easy defaults with single or parallel sockets have a much lower limit. Maybe one could use the same switch for implicit extreme copy mode to specify the number of connections if the source is not a meta link file? E.g. ``` xrdcp -y 10 root://server//10G /dev/null ``` does implicit extreme copy from 10 named connections: ``` root://1@server//10G root://2@server//10G root://3@server/10G ... root://10@server//10G ``` Or do a fix to get the same result using the -S switch? -- Reply to this email directly or view it on GitHub: https://github.com/xrootd/xrootd/issues/1938 You are receiving this because you are subscribed to this thread. Message ID: <[log in to unmask]> ######################################################################## Use REPLY-ALL to reply to list To unsubscribe from the XROOTD-DEV list, click the following link: https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=XROOTD-DEV&A=1