> He already said he has SSD's for dedicated log. This
> means the best
> solution is to disable WriteBack and just use
> WriteThrough. Not only is it
> more reliable than WriteBack, it's faster.
> And I know I've said this many times before, but I
> don't mind repeating: If
> you have slog devices, then surprisingly, it actually
> hurts performance to
> enable the WriteBack on the HBA.
The HBA who gives us problem is a LSI 9200-16e which has no cache whatsoever.
We do get great performances with a Dell H800 that has cache. We'll use H800s
if we have to, but i really would like to find a way to make the LSI's work.
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