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117210
March 3rd, 2014 11:00
Equallogic Auto Tiering
I have two Equallogic ps4000E (7.2 rpm, RAID-50)and PS6000 (15rpm, RAID-10). both are in same group and different pools (pool1 and pool2 accordingly). Here how can I test auto Tiering is working or not ?
Are there any option (using application) to check that the Auto Tiering working properly as Dell Advertise as Equallogic support Auto Tiering ...???
Thanks in advance..
Jamshed
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jamsheduddin
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March 3rd, 2014 12:00
Hi Don,
Ok,
After keeping both member in the same pool will I be able to see how auto tiering works or perform by seeing any graph or volume size observation.
Thanks
jamsheduddin
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March 4th, 2014 02:00
Hi Don..
To Demonstration of CLB and a document from Equallogic pdf statement says " Mission-critical applications (particularly those that involve lots of small, random writes) might be best stored on PS Series arrays with 15,000 RPM drives configured as RAID 10. This results in storage optimized for high-speed random-access."
and
" For many applications, this performance is not required for volumes that are providing bulk storage of less frequently-needed data. These volumes might best be stored on PS Series arrays with 7,200 RPM drives configured as RAID 50. This results in storage optimized for greater storage capacity " .
By the above description if I create a volume in the R10 configured member (ps6000 - SAS Drive, 15k rpm) which is not frequently accessed or used, will the volume automatically move to R50 configured member (ps4000E - SATA Drive, 7.2K rpm) ?? . If happen so it should be monitor by GUI.
pdf link: http://en.community.dell.com/cfs-file.ashx/__key/telligent-evolution-components-attachments/13-3862-00-00-19-86-14-79/TR1027_2D00_Tiered_2D00_Storage_2D00_v2.1_2D00_Final.pdf (page: 9 )
regards..
Jamshed
rannetts
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March 6th, 2014 21:00
Whatever you do don't mix the members types in a pool (ie create a pool with ps4000E + ps6000). The marketing will say you can do this and sure you can, but if you have any serious IO workload then do not do this. Equallogic support will tell you that this is not recommended. Learned this the hard way with 2 x PS6110XS and 2 x PS6110E. The solution was to buy 2 more PS6110XS and use the 2 x PS6110E for replication.
- RA