There are definitely performance issues with random vs. sequential IO on any drive including SSDs, but you have to consider that half-as-fast-as-a-formula-one is still much faster than a Buick. :)
-Adam On Sat, Aug 10, 2013 at 8:10 PM, Charles Polisher <[email protected]>wrote: > On Fri, Aug 09, 2013 at 10:29:02AM -0700, Ski Kacoroski wrote: > > Ok, I have done a lot of research in the last few days on the Tintri > > and am wondering if anyone else here has experience with it for > > server virutalization (not VDI). From my research it really seems > > to be a breakthrough technology as it is based on vm and vmdk, not > > on luns so they can do all kinds of neat things that you cannot do > > with a traditional SAN (map io/latency to a vmdk, replicate at vm > > level, etc.). So if you have one, I would appreciate your comments > > on what you think about it. > > It might depend on your workload. Min's presentation at FAST > 2012 suggested SSDs have performance and reliability issues with > random write workloads. I'd guess there are pathological > workloads that chronically cycle between disk and SSD. Auto > placement has to set the hysteresis just right to avoid such. > Nothing trrumps testing actual equipment with actual workloads. > > HTH, > -- > Charles Polisher > > _______________________________________________ > Discuss mailing list > [email protected] > https://lists.lopsa.org/cgi-bin/mailman/listinfo/discuss > This list provided by the League of Professional System Administrators > http://lopsa.org/ >
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