>> On Sat, 29 Aug 2009 09:24:11 +0200, Stefan Folkerts >> <stefan.folke...@itaa.nl> said:
> Now I am thinking, dedupe only occurs when you move data the volumes > or reclaim them but 10G volumes might not get reclaimed for a LONG > time since they contain so little data the chance of that getting > reclaimed and thus deduplicated is relatively smaller than that > happening on a 100G volume. I think that, to a first approximation, the size of the volume is irrelevant to the issues you're discussing here. Do a gedankenexperiment: Split 100TB into 100G vols, and into 10 10G vols. Then randomly expire data from them. What you'll have is a bunch of volumes ranging from (say) 0% to 49% reclaimable. You will reclaim your _first_ volume a skewtch sooner in the 10G case. But on the average, you'll reclaim 500G of space in about the same number of days. Or said differently: in a week you'll reclaim about the same amount of space in each case. I need to publish a simulator. So pick volume sizes that avoid being silly in any direction. - Allen S. Rout
