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Exchange Pre-Deployment Testing

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JetstressCmd has an undocumented /report command.
JetstressCmd has an undocumented /report command --- which means this function is unsupported. I couldn't publish a neat command interface due to a tight schedule for this function. The program should be able to find all the arguments such as machine Read More...
Jetstress: When you see unstable latency slope
NOTE: You may see unstable/uneven latency slope failure if Jetstess cannot see stable latency slope within 10 minutes. The tuning process takes many tuning cycles until it succeeds or fails in tuning goals. It starts with the initial parameter values Read More...
Jetstress quits itself while attaching databases.
Jetstress quits a test run prematurely while attaching databases at the same time. Internally, there is unhandled JET_errDatabaseSignInUse due to a race condition. This is a known issue --- I will make available the fix in July web release. Here is an Read More...
Jetstress: Disk sub-system thresholds
Performance counter thresholds are updated. But, there are some differences from Exchange 2003 Performance Troubleshooting Guide for some reasons. Database Disks: · Average Disk sec/Read (or I/O Database Reads Average Latency): The average should be below Read More...
Jetstress: Report has all zeros for European numbers.
There is a known issue: Symptom: If you have Standards and formats to be German (Germany) or Dutch (Belgium), you will have all zeros for European numbers in all test reports as follows: LogicalDisk Avg. Disk sec/Read Avg. Disk sec/Write Disk Reads/sec Read More...
Jetstress: You may receive ESE event ID 215.
This is a known issue in Jetstress. This is so benign that it never affects your testing in terms of correctness, performance, and security. Please, train yourself to ignore this benign error until I can make the fix available in a later web release: Read More...
Jetstress: Unevenly distributing users across storage groups.
Question: I have uneven distribution of users across storage groups. Storage group 1 has 700 GB with 739 users and storage group 2 has 350 GB with 261 users. Can I run multiple instances of JetstressWin.exe or JetstressCmd.exe (one instance per storage Read More...
Q&A: What do capacity percentage and throughput percentage do?
--- Excerpted from Jetstress CHM help documentation --- There are options to size the test databases using the percentage of the maximum storage capacity, and target I/O throughput (IOPS) by the percentage of the maximum throughput capacity of the disk Read More...
Use AdPlus to troubleshoot process hangs
AdPlus hang-mode creates a directory in the current directory (or the output directory if specified) called Hang_Mode__Date_mm-dd-yyyy__Time_HH-MM-SS. This means you can continue to run the same ADPlus command line repeatedly without losing your data. Read More...
How to pester Error Reporting immediately
1. Jetstress or Load Generator would send ‘offline’ Watson reports to the admin queue --- which is located at “ %SystemRoot%\PCHEALTH\ERRORREP\QSignoff ”--- you can send them through a file transfer service on your own. 2. The customer uses eventvwr.msc Read More...
Exchange Server Jetstress (08.01.0075)
Exchange Server Jetstress (08.01.0075) March 7, 2007. Verify the performance and stability of the disk subsystem before putting the Exchange server into a production environment. • 64-bit download • 32-bit download Here is a list of issues that are all Read More...
Jetstress: How to include your counters in performance log.
Months ago, I got a storage vender's feedback that his job will become a lot easier if he can define additional performance counters for his storage hardware to the performance log. I decided to provide him with a convenient way to add new performance Read More...
Jetstress 08.01.0075 has fixed a list of issues.
Here is a list of issues that are all fixed in the March release (08.01.0075 build): Exchange 2003 database engine (ese.dll ) should have 500 MB and 900 MB database cache size min and max. DataGridView: System.InvalidOperationException: This operation Read More...
Exchange Server Jetstress (08.01.0038)
Exchange Server Jetstress (08.01.0038) January 3, 2007. Verify the performance and stability of the disk subsystem before putting the Exchange server into a production environment. • 64-bit download • 32-bit download Read More...
Q: 20 ms latency is hardcoded?
A: There are two sets of latency thresholds defined in the Jetstress xml configuration file: One is strict for a test short than or equal to 6 hours. The other is lenient for a test longer than 6 hours (it is also called a stress test). Excerped from Read More...
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