Hi everyone.
Had a problem about speed write by some write frist dd(s) on my rootdisk
(My rootdisk-RBD was based on other RBD-Image). It have run more slowly,
but running faster after.
(I used writeback cache on RBD Client side and RAID Phisycal).
#dd if=/dev/zero of=bigfile01 bs=1M count=500 conv=fdatasync
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 5,51315 s, 19,0 MB/s
Then:
#dd if=/dev/zero of=bigfile03 bs=1M count=500 conv=fdatasync
300+0 records in
300+0 records out
314572800 bytes (315 MB) copied, 4,16175 s, 75,6 MB/s
Please explain this proplem to me!,
Thanks!
--
Tuantaba
Ha Noi-VietNam
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