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17 Posts
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1199
March 21st, 2016 07:00
help configing VNX5600
Hi people, I'm starting configuring a VNX5600.
Some information:
1 bus , 2 enclosure
Disk are:
2 SAS Flash 92 GB
10 SAS Flash VP 366 GB
33 SAS 1,1TB ( 10k )
4 SAS 268 GB ( Vault disk )
We have FAST CACHE and FAST VP enabler.
I want also use mirrorview, clone and snapshot ( so, I need some space for RLP ).
My idea is:
- Use the 2 SAS flash 92 GB for FAST CACHE ( raid 1 ) so, I'm using just one disk, maybe I'll order a new one for Hot spare
- Create a pool using enabling fast VP :
9 SAS FLASH VP 366GB in a RAID 5 ( 8+1 ) configuration
27 SAS 1,1TB in 3 RAID 5 ( 8+1 ) configuration
- Create a raid group for a RLP :
5 SAS 1,1TB in a RAID 5 ( 4+1 )
HOT SPARE:
1 FLASH VP 366GB
1 SAS 1,1TB
What do you think about?
Many tanks!!
ZaphodB
195 Posts
0
March 22nd, 2016 07:00
You only have 49 disks listed, so I am going to echo Glen's comment that you will need a third 92GB EFD to properly create FastCache.
There are two back-end buses on all the VNX2 controllers, and with the number of SSDs you have I will suggest that you engage both by putting the 2nd enclosure on bus #1. Honestly I wouldn't ever suggest not engaging all the available buses, even without the SSDs.
Other than that I wonder what premium you are paying for the 5600 over what a 5200 or 5400 would cost. There is more cache and faster CPUs in the 5600 controllers, but with MCX and only 50 disks I would be hard pressed to quantify the additional performance that you will see. You don't mention the front-facing ports; while I assume they aren't 1Gb Ethernet they could still be more of a bottleneck than the difference between the 5200 and 5600 controller will provide.
kelleg
4.5K Posts
1
March 21st, 2016 10:00
That looks like a good configuration - you do you one spare for the SSD used in FAST Cache.
If you're going to use Mirrorview/Async you'll need some Reserve LUNs for each mirror also. A raid group is best for the Reserve LUNs (RLP) - it is faster then using a Pool, plus you don't have to worry about the RLP LUNs trespassing and causing issues in the CMI bus if the RLP were in a Pool (the CMI Bus if the backend communication channel between the two SP's).
Depending on you applications, this should be OK - if you're planning on using a database (SQL, Oracle), then you would need a different configuration - you would want to have different Pools for the different types of LUNs used for database - Logs and Temp would want to be in either a raid group (best) or a Pool with no EFD and no FAST Cache enabled and using Raid 10 (R10). The DB LUNs would be a normal Raid 5 Pool with FAST cache enabled.
glen
kelleg
4.5K Posts
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March 29th, 2016 08:00
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glen