Hi Mark.


> The SL4500 series looks like it should be a good option for large
> deployments, though you may want to consider going with the 2-node
> configuration with 25 drives each.  The drive density is a bit lower but
> you'll have a better CPU/drive ratio and can get away with much cheaper
> processors (dual E5-2620s should be sufficient for 25 drives).
>
> You mean that a 2-node configuration should be faster/have better ROI then
2xSL4500 boxes?


> It's important to keep in mind that unless you are talking about deploying
> multiple racks of OSDs, you are likely better off with smaller nodes with
> fewer drives (say 2U 12 drive boxes).  That helps keep the penalty for
> losing a node from being too dramatic.
>
> Interesting, any vendors/models you can advise? I do like high-density
machines as they are more space efficient (per U) and should be more power
efficient as the result, but you have a point there about the penalty.
Btw, how drastic would be loosing a single node / machine, with 3x
replication?


> Both the SL4500 and the Dell C8000 allow you to have configurations with
> multiple nodes in 1 chassis with fewer drives, so they are kind of an
> interesting compromise between high density and keeping the drives-per-node
> count lower.  Granted, they both tend to be more expensive than supermicro
> gear, so like always it's a giant balancing act. :)
>

Actually the SL4500 should be only ~30% more expensive (according to
postings) then SuperMicro SC847, while having ~2x drive density.

Regards,
Stas.
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