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BlackBerry Enterprise Server for Microsoft Exchange

Technical Note: Impact of using the BlackBerry Calendar Synchronization Tool

The test environment consisted of 2000 users on a single BlackBerry Enterprise Server. Two identical

Microsoft Exchange servers each supported 1000 users. The calendars of all 2000 users were

populated with approximately 12 appointments each day over a period of several days. Separate

tests measured the performance impact on the environment when the BlackBerry Calendar

Synchronization Tool was configured to synchronize calendar differences over 1 day, 2 days, 3 days,

and 4 days.

The synchronization task ran at a steady state for approximately 30 minutes, and then decreased

gradually until it was complete. The total time that the task took to complete was 60 minutes.

Results

The following results represent the steady state portion of the synchronization task. The results for

the two Microsoft Exchange servers were combined.

Resource impact during a 30-minute steady state period

Days

Appointments

27,000

48,000

70,000

94,000

The following graphs demonstrate that the use of system resources was relatively linear for the

increasing number of calendar appointments that the BlackBerry Enterprise Server processed.

BlackBerry Enterprise Server % Processor Time

Last saved: 14/08/2008

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BlackBerry

Microsoft Exchange

Enterprise Server

Server % Processor

% Processor Time

Time

3 of 7

Microsoft Exchange

Server Disk

Transfers/sec (IOPS)

577

701

793

1088