Find most economic disk setup with BVQ   Michael Pirker   Michael.Pirker@SVA.de   +49 151 180 25 26 00Bsys2.pptx
Target for this presentation   • Target         • a mail environment has to be moved from an oversized 10k 300GB storage t...
Select Volumes for performance analysis                      Make use of the BVQ Accounting Package                       ...
Facts measured to support calculation   • Requested         • 40 TB Capacity         • 2500 IOPS                       Cac...
Results with Spreadsheet     •   Target IOPS 2500 IOPS     •   RW Distribution: was measured before. Splits IOPS in       ...
What makes this result particularly valuable?         • calculated based on facts              decreased the number of nee...
BVQ in the www   • BVQ Website       http://www.bvq-software.com/                  (still German will change to English un...
Page 8
Upcoming SlideShare
Loading in …5
×

SVC / Storwize: cost effective storage planning (BVQ use case)

370 views

Published on

  • Be the first to comment

  • Be the first to like this

SVC / Storwize: cost effective storage planning (BVQ use case)

  1. 1. Find most economic disk setup with BVQ Michael Pirker Michael.Pirker@SVA.de +49 151 180 25 26 00Bsys2.pptx
  2. 2. Target for this presentation • Target • a mail environment has to be moved from an oversized 10k 300GB storage to a new storage environment. The new environment shall use 7.2k 1TB drives with Raid 6. • BVQ is already installed so we can measure IOPS, RW Distribution and caching to do a most economic sizing • We analyze the performance of all disks that are involved • We can proof that 2500 IOPS are what we need • It is already known that R/W distribution is 55% Read • The diagram shows a constant read cache hit rate of 90% • The diagram shows a constant write cache hit rate (overwite in cache) of 15% SVC will put all write data on the cache but 15% of this data will be overwritten before destaging happens. These IOPS will never affect the disk. • Safety Margins We see a transfer rates which will improve write penalties for raid 6. ánd we use a conservative IO estimation for 7k drives. We do not take in account that the storage system may further improve IO behavior with of own cachingPage 2
  3. 3. Select Volumes for performance analysis Make use of the BVQ Accounting Package Create a Volume Group of all Volumes that belong to the mail system Analyze the Volume Group now Without Accounting Package you can select all volume by search.Page 3
  4. 4. Facts measured to support calculation • Requested • 40 TB Capacity • 2500 IOPS Cache Hit Read • Facts from Chart (4 work days) Transfer • 55% RW Distribution Size RW • 90% Cache Hit Read • 15% Cache Hit Write IOPS RW • Big Transfer size improves Cache “Write Penalty” for Raid 6 Hit Write (Full Striped Writes)Page 4
  5. 5. Results with Spreadsheet • Target IOPS 2500 IOPS • RW Distribution: was measured before. Splits IOPS in R/W • Cache Hit Read: Reduces read IOPS with measured Cache Hit Rate • Cache Hit Write Reduces write IOPS (Overwrite in Cache ) with measured Cache Hit Rate • IOPS eff. is sum of read IOPS and write IOPS • The number of disks are now calculated with this formula Result is 48 Disks with 7.2kRPM Good fit because we need 40TB capacityPage 5
  6. 6. What makes this result particularly valuable? • calculated based on facts decreased the number of needed Disks dramatically • most economic result • minimum of costly safety margin Other scenarios without knowledge about facts We assume Raid 6 and 50% read and 70% cache hit for read IOPSeff = 1625 72 Disks We assume Raid 6 and nothing more IOPSeff = 2500 201 DisksPage 6
  7. 7. BVQ in the www • BVQ Website http://www.bvq-software.com/ (still German will change to English until latest Feb 25. 2013) http://www.bvq-software.de/ (German) http://bvqwiki.sva.de (technical wiki with download – international) • BVQ Videos on YouTube http://www.youtube.com/user/SVAGmbH • SVA Webseite von SVA GmbH http://www.sva.de/ Internationale Webseiten • Developer Works Documents and Presentations https://www.ibm.com/developerworks/mydeveloperworks/... http://tinyurl.com/BVQ-DocumentsPage 7
  8. 8. Page 8

×