14 Feb
2013
14 Feb
'13
9:34 a.m.
Ciro Iriarte wrote:
8 vCPU + 2GB RAM VMware guest with a 30GB RRD footprint. After adding about 320 new hosts (all of them, network gear) the RRD database went to 130GB and the little machine got peaks of 3k IOPS. The I/O wait was rather hi and the machine would suddently stop responding
I'd get two 240 GB SSDs, configure them as a ZFS mirror pool and dedicated it to RRD. Don't forget to turn off atime, and let the pool use 4kB sectors (ashift=12), otherwise SSDs won't be happy.
Mark