On 23/06/12 19:21, Wojciech Puchar wrote:
ALT storage, so for instance you could keep your indexes in a RAID10 of SSDs, recent email on a RAID10 of 10kRPM/15kRPM SAS drives, and older email can go on a load of 5k/7.2k SATA drives in RAID6, or on a NAS via NFS.
far better solution but still about 2-3 times more $/performance than needed, and more complex than needed.
But at least an improvement
I'd respectfully disagree. If you only keep the most recent few weeks of email you could use reasonably priced SSDs for the indexes and perhaps downgrade to SATA for your "hot" store, both of which should be max 10% of your total space with more than a few months of email. My driving factor was to have different spindle sets for each purpose. Who knows, I might have overspent and could have done it with 3 separate SATA arrays.
OTOH what about an SSD caching kit on your server? Supermicro at least do them (well, my UK vendor offers them). Just have a load of big SATA drives and use the kit for caching. The last time I looked a 256GB kit was about UKP 500.
Cheers
Alex
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