Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
Leroy van Logchem wrote: > The numbers you get don't include the sync, you want to know when it's > *on* disk too. > time dd if=/dev/zero of=./tmp bs=1M count=4000 ; time sync Hi, On the replicated disk time dd if=/dev/zero of=/drbddisk/tmp bs=1M count=4000 ; time sync 4000+0 enregistrements lus 4000+0 enregistrements écrits 4194304000 octets (4,2 GB) copiés, 163,287 seconde, 25,7 MB/s dd if=/dev/zero of=/drbddisk/tmp bs=1M count=4000 0.00s user 10.16s system 6% cpu 2:43.29 total sync 0.00s user 0.00s system 0% cpu 0.298 total On the local disk time dd if=/dev/zero of=/localdisk/tmp bs=1M count=4000 ; time sync 4000+0 enregistrements lus 4000+0 enregistrements écrits 4194304000 octets (4,2 GB) copiés, 87,4665 seconde, 48,0 MB/s dd if=/dev/zero of=/localdisk/tmp bs=1M count=4000 0.00s user 7.42s system 8% cpu 1:27.47 total sync 0.00s user 0.00s system 0% cpu 2.782 total > You might want to try: al-extents 3833; I'm gonna try this. > Does your network reach 100MB/s? Verify with iperf or netpipe. > > Performance of the network ain't bad: 123: 8388611 bytes 3 times --> 896.07 Mbps in 71423.18 usec