LISTSERV 16.5 - XROOTD-DEV Archives

Thanks, did that varying number of chunks in flight and size:

1 standard socket:

[root@node]# for chunks in 4 8 16; do for chunksize in 4194304 16777216 67108864 134217728; do echo chunks:$chunks size:$chunksize;  env XRD_CPPARALLELCHUNKS=$chunks XRD_CPCHUNKSIZE=$chunksize time -f%es xrdcp e.meta4 /dev/null -f --nopbar; done; done
chunks:4 size:4194304
5.13s
chunks:4 size:16777216
4.65s
chunks:4 size:67108864
5.03s
chunks:4 size:134217728
5.14s
chunks:8 size:4194304
5.14s
chunks:8 size:16777216
4.56s
chunks:8 size:67108864
4.78s
chunks:8 size:134217728
5.42s
chunks:16 size:4194304
4.55s
chunks:16 size:16777216
4.52s
chunks:16 size:67108864
5.26s
chunks:16 size:134217728
5.54s

4 parallel sockets:

[root@node]# for chunks in 4 8 16; do for chunksize in 4194304 16777216 67108864 134217728; do echo chunks:$chunks size:$chunksize;  env XRD_CPPARALLELCHUNKS=$chunks XRD_CPCHUNKSIZE=$chunksize time -f%es xrdcp -S 4 e.meta4 /dev/null -f --nopbar; done; done
chunks:4 size:4194304
4.55s
chunks:4 size:16777216
3.92s
chunks:4 size:67108864
4.58s
chunks:4 size:134217728
4.87s
chunks:8 size:4194304
4.45s
chunks:8 size:16777216
4.03s
chunks:8 size:67108864
4.78s
chunks:8 size:134217728
5.09s
chunks:16 size:4194304
4.26s
chunks:16 size:16777216
5.25s
chunks:16 size:67108864
5.00s
chunks:16 size:134217728
5.22s

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