Am 13.07.2012 20:45, schrieb Wojciech Puchar:
Typical SMB setup it seems.
True. More - i always try to mix services. No separate "file servers", "mail servers", "whatever" servers but all on same. On large install divide by groups of people, not services.
This way i really cannot get to high IOPS
"cannot" is plain wrong, you are satisfied only by luck
Seems like you do same ill service like 1000 (or more) mail accounts per hard disks
there is nothing ill
http://h18000.www1.hp.com/products/quickspecs/13551_na/13551_na.pdf 1 Gb Ethernet / iSCSI -> 17200 Random IOPS with RAID10 1 Gb Ethernet / iSCSI -> 9400 Random IOPS with RAID5 1 Gb Ethernet / iSCSI -> 5600 Random IOPS with RAID6
and here ware are at a point where your local disks are outperformed because they give you typically 100-300 IOPS per disk which you refused over a complete thread believing you localSATA is the best thing whichs exists
and yes, the dedicated storage-controllers and caches of a SAN storage are what is outperforming you at real load