SSD vs Flash based SANs – Oracle DB I/O comparison
SSD vs Flash based SANs – I/O comparison During a storage migration project from SSD based SAN and Flash based SAN, we have performed following tests to compare the I/O performance. On each of the tests it was observed flash was outperforming the SSD SAN on various magnitudes. This is not a comprehensive load test, but this acted more as a POC to go ahead with the flash implementation. 1. File Creation using “ dd” command 10 G File Creation root@prt51fin2 # date;time dd if=/dev/zero of=/xiv-test1/xivtest count=10240 bs=1048576;date Wed Jan 24 17:20:32 IST 2018 10240+0 records in 10240+0 records out real 1m16.735s user 0m0.043s sys 0m8.783s Wed Jan 24 17:21:49 IST 2018 root@prt51fin2 # ---------------------------------------------------------------------------------- root@prt51fin2 # date;time dd if=/dev/zero of=/flash-test/flashtest count=10240 bs=1048576;date Wed Jan 24 17:23:35 IST 2018 10240+0 records in 10240+0 records out real 0m2