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Go to SolutionHow does FAST move the extent?
Hello Experts!
Could you please tell me how it can be according next output if we have the FAST policies like this:
Policy A: 10% EDF - 10 % FC - 80% SATA
Policy B: 15% EDF - 15 % FC - 70% SATA
and output:
the device 09c1 and 061e are bound to SATA pool and as you can see the extents are allocated on SATA and EDF only?
How is it possible? We have strong rules for FAST and as I understand all extent should be allocated according these rules:
(for Policy A) - 10% extents should follow to EDF, 10% to FC and 80% to SATA respectively. On the screen shot I don't see allocation for FC pool at all. Could you please explain?
And one more question regarding pools and FAST.
For instance we have 3 pools - EDF, FC and SATA. and free space on them EDF - 1 gb, FC - 5 gb and SATA - 100gb.
and the same FAST policy - 10% EDF - 10% FC and 80% SATA.
I bind new volume 100gb to FC pool (Max. Subscription limit allows me to do that and don't think about PRC for this example) and host does write to volume and within 10 min all 100 GBs have been written to volume. Of course almost all of extents will be written to SATA pool (am I right?) and then how the FAST will transfer extents if we have so strong policy? it can allocate 10 gb on EDF and 10 gb on FC pools, there are not enough space. which is the behavior of FAST in this situation?
Thank you!
Message was edited by: evgenym
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