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October 7th, 2013 19:00
Migrating into FAST VP pool
IHAC that is migration 100+ TBs from various platforms into a VPLEX/VNX w/ FASTVP. His experience so far has been that a significant portion of the initial allocations are on the NLSAS tier (they are a 4/16/80 mix) This then causes an initial performance issue until things “balance” which is one to 2 days. ( a few were longer) Their policy is “start high then auto”
So…we are wondering if anyone has ideas or best practices that can help alleviate this issue…any thoughts will be appreciated.
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NickyRuggs
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October 7th, 2013 19:00
Most people so far that I've discussed this with suggest pinning to the low tier during migration. Then only Hot data will be promoted during normal operations.
clayman88
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November 21st, 2013 06:00
I would agree. Pin the low IO LUNs to NL-SAS and once things even out, maybe start switching things back to auto so the VNX can optimize the chunks of data appropriately.