2 September 2009

Exchange Server 2010Microsoft

By: Marius Oiaga, Technology News Editor

Exchange Server Jetstress 2010 Beta for Exchange 2010Available for download

Microsoft has updated the tool designed to simulate disk I/O load on Exchange servers inorder to accommodate the next iteration of Exchange Server. Customers looking to migrateto the successor of Exchange Server 2007 will be able to take advantage of the MicrosoftExchange Server Jetstress 2010 Beta (64 bit) in order to test both the performance andstability of the disk subsystem in their environment prior to putting Exchange Server 2010into a production environment. Microsoft has explained that the latest release of Jetstresscomes with support tailored to the new Input Output characteristics of Exchange 2010.

"Jetstress team has prioritized validating Jetstress 2010 with Exchange 2010 versions ofESE vs. testing older ESE versions (Exchange 2003 and 2007). The goal of Jetstress 2010is to completely replace Jetstress 2007 so it does support E2003/E2007 ESE binaries, butthose scenarios are much less tested at this time," revealed a member of the JetstressDevelopment Team. "Jetstress 2010 requires the most recent version of E2010 ESEbinaries."

Microsoft is advising all customers looking to perform Exchange Server 2003 and ExchangeServer 2007 testing to leverage Jetstress 2007. In this context, the software giant wantsJetstress 2010 to be used only with Exchange Server 2010. As of mid-August 2009, Exchange Server 2010 Release Candidate (RC) is available for download directly from theRedmond-based company.

"Jetstress 2010 supports Windows 2003 and higher but Exchange 2010 supports W2K8SP2 or W2K8 R2. Please use Windows Server 2008 SP2 or Windows Server 2008 R2 withJetstress 2010 when using E2010 ESE binaries. Only the 64bit version of Jetstress 2010has been provided at this time. 32bit Jetstress 2010 will be available in the final release,"the Jetstress Development Team representative added.

Microsoft enumerated some of the new functionality changes introduced to Jetstress 2010:

"- Updated with Exchange 2010 Mailbox IO profile (32KB page size, avg DB read size, avgDB write size, avg Log write size etc...); - Database duplication is now multi-cast; - Moved away from using Logical Disk performance counters to using MSExchangeDatabase IO counters for IO measurement; - Log check summing is now multi-threaded; - Maximum number of Databases per test increased to 100 for E2010 ESE binaries; - Log replication IO is now simulated based on E2010 HA architecture- Background Database Maintenance (Checksum) is now simulated for E2010 testconfigurations; - Traces now contain date and time information for every entry; - More informative messages and warnings are provided prevent admins from usingmismatched ese/eseperf and have further problems with performance counters errors whengenerating test reports. - Only the minimum necessary number of databases is created/replicated (as opposed to 5databases per ESE instances); - ESE performance counters are now unregistered/registered back if it is detected that the

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current registered version is inconsistent with the version Jetstress will use. RestartingJetstress is still required; - JetstressCmd and JetstressWin are now consistent in overriding the test type fromPerformance to Stress if the duration is longer than 6 hours;- System and Application events are now saved off per Jetstress run for time of run (alongwith html reports and perfmon log)."

Microsoft Exchange Server Jetstress 2010 Beta (64 bit) is available for download here.

Exchange Server 2010 Release Candidate (RC) is available for download here.

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