2 posts • joined 8 Oct 2008
Compellent block level?
If you mean a 4MB block then yes. If you are running a 4K block size at the application layer, major coalescing occurs when it is written to disk, so unless your application has VERY localized data sets, this model isn't as efficient as you'd expect, however, that said, they do it at a more granular level then most.
This is no different then the NetApp Guarantee! Sepaton requires you to have a minimum of 5 full backups a week (from my experience most applications are only fully backed up once a week these days, with incremental and or differential backups daily).
Now I will concede that there are very good features within Sepaton and there will be savings on capacity used, but it looks like most of these will be coming from so many repeat "disk images" from daily backup policies.
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