This may sound stupid, but I'm running a benchmark and I can't really make sense out of the output. The per character (Per Chr) reads seem really low compared to other Bonnie++ results I've seen online.
For reference this a RAID-z2 array using 4 refurbished HGST 750GB Ultrastar drives, 20GB RAM, and 100GB of cache on SSD partition (probably overkill, but I wasn't using the rest of the SSD).
The " -b " is supposed to prevent write buffering, so I don't think the cache should come into play for this but I may be totally wrong about that.
Anything look peculiar here? Any insights from others who have set up parity RAIDs would be appreciated.
$ bonnie++ -d /mnt/zd16p1/Test -s 50G -b
Version 1.97 ------Sequential Output------ --Sequential Input- --Random-
Concurrency 1 -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP
oversoul 50G 69 34 202032 24 126873 16 5962 89 162327 4 117.2 5
Latency 185ms 1681ms 1374ms 30267us 542ms 585ms
Version 1.97 ------Sequential Create------ --------Random Create--------
oversoul -Create-- --Read--- -Delete-- -Create-- --Read--- -Delete--
files /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP
16 855 2 +++++ +++ 449 1 288 0 +++++ +++ 287 1
Latency 28295us 27us 34103us 22562us 41us 22508us