ESG Lab Review: HP P4000: Affordable, Scalable, Reliable Storage


 200 MB mailbox quota  0.40 IO’s per second(IOPS) per “heavy” user profile  24 storage groups per server  1 database per storage group


The aggregate performance shown below in Figure 5 is excerpted from the 80 page submission document. The full report is available for download from the Microsoft ESRP website.3


Figure 5. HP P4500 ESRP Results


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What the Numbers Mean:


 The P4000 SAN demonstrated an aggregate of 89,001 I/O per second overall with 67,012 Database I/O per second and 21,989 Transaction Log I/O per second.


 The average Database I/O per second result for each of the 19 JetStress clients (3,527) exceeded the targeted rate of 0.40 IOPS per mailbox (3,200 per Exchange server).


 The HP P4000 SAN completed the certification test with an average database read response time of 19 milliseconds. A response time goal of 20 milliseconds or less for database reads is required to pass the test. These values are defined byMicrosoft as a limit beyond which end-users will feel that that their e-mail system is acting slowly.


Why This Matters


A storage system with poor scalability and slow response times can result in loss of sales, loss of customer goodwill, loss of productivity, loss of competitiveness, and increased costs. With more and more organizations relying on e- mail as one of the most significant business applications, IT managers need a storage system architecture that can deliver predictably fast e-mail response times—regardless of how many users rely on the system.


Microsoft-approved ESRP testing with 152,000 Exchange mailboxes has confirmed that the clustered, pay as you grow HP P4000 architecture can sufficiently handle a very large number of Exchange users with predictably fast response times.


3 http://technet.microsoft.com/en-us/exchange/bb412164.aspx © 2010 Enterprise Strategy Group, Inc. All Rights Reserved.


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