Am 23.11.2012 11:47, schrieb Alexandre DERUMIER:
when i switch the journal to the OSD Disk seperate partiton on each disk
(/dev/sdX1 for journal 1GB and /dev/sdX2 for OSD) i go down from 23.000
iops to 200 iops random 4k.
O_o , that's seem crazy...
Are you sure that your partitions are correctly aligned ? (starting first partition at sector 2048 is best for ssd)
Model: ATA INTEL SSDSC2CW24 (scsi)
Disk /dev/sdb: 468862128s
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Number Start End Size File system Name Flags
1 2048s 2342911s 2340864s xfs pri
2 2342912s 468860927s 466518016s xfs pri
Stefan
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