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Expanding Storage Pool for File on VNX 2
Hi All,
We have a VNX2 7600 which we use for both file & Block. Currently we have dedicated file pool with both SAS (4+1) & NL-SAS (6+2) disks. There are 20 LUNS in file pool each of 2340 GB. Now we need to expand the pool by around 5 TB. We only have 8 NL-SAS disks for pool expansion, which will give us around 2751 x 6= 16506 GB of usable space.
Now we can not create another 10 LUNS of 2340 GB as per the EMC best practices. Either we can create 7 LUNS of 2340 GB (Current LUNS in file pool) or 10 LUNS of 1650 GB.
Kindly suggest which option to take.
Regards-Vishal
Rainer_EMC
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February 16th, 2015 03:00
Depends on how fully your existing LUNs are used.
The idea of creating LUNs of the same size is so that AVM can stripe across them.
If your existing LUNs are already fully used than this is a moot point and I would create 10x LUNs since that allows for better striping of the new LUNs (AVM default of 5).
Just be aware that new file systems created will be allocated on NL-SAS with NL-SAS performance characteristics (unless you use FAST VP)
Vishalattrey
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February 16th, 2015 05:00
Thanks Rainer for your response. We do have FAST VP & currently the existing LUNs are not fully used. Just want to pick either 10x LUN's or same size LUN rule.
Rainer_EMC
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February 16th, 2015 06:00
I would go for 10x LUNs in that case