Study Reports Exchange Server 5.5 Dramatically Outperforms Domino R5

REDMOND, Wash., Jan. 10, 2000 — Microsoft Corp. today announced that a new study, conducted by ZD Labs, demonstrates that Microsoft® Exchange Server 5.5 dramatically outperformed Lotus Notes/Domino R5 in critical e-mail tasks. This study is the first head-to-head performance comparison of the two leading messaging and collaboration systems available today. Calling Exchange Server 5.5
“far more responsive and productive”
in its tests than Domino, the study shows that Exchange Server 5.5 significantly outperformed Domino:

  • Exchange Server 5.5 provides faster e-mail message delivery: Its maximum message throughput was up to 277 percent higher than that of Domino R5.

  • Exchange 5.5 reduces system delays and increases user productivity: Its response time was up to 23 times faster than Domino R5 during periods of peak system loading.

  • Exchange 5.5 decreases total cost of ownership: Its scalability was three times that of Domino R5 (based on the number of users the system was able to adequately serve during peak loads).

  • Exchange 5.5 reduces administration costs: It took six minutes to create 15,000 new user accounts, compared with 25 hours for Domino R5.

  • Exchange 5.5 further reduces hardware costs: It used approximately 97 percent less disk space than Domino R5 when creating user accounts.

All tests were done using the standard SMTP and POP Internet protocols. Exchange Server 5.5 provides native support for these protocols, which are the basis for Internet and business-to-business messaging as well as the emerging application service provider market. These standards also provide a consistent basis for directly comparing the performance of messaging systems because all modern messaging systems support these standards.

These findings validate the high-performance architecture used by Exchange Server 5.5, which has licensed over 40 million copies in three and a half years. Using a transacted database for full recovery, with specialized message routing and delivery, Exchange Server 5.5 provides an excellent foundation for both enterprise messaging and hosted solutions. The complete text of the report is available on the ZD Labs Web site at,8829,2352352,00.html .

Study Details Better Performance, Scalability of Exchange Server 5.5

The study tested numerous real-world e-mail scenarios using configurations that modeled both departmental and enterprise usage. Both systems were run on the same hardware configuration, and the tests simulated usage by up to 15,000 users checking their mail every 15 minutes and sending a message to three recipients every 15 minutes. The results were as follows:

  • Exchange Server 5.5’s maximum message throughput of 45.05 messages per second was up to 277 percent better than Domino R5’s maximum of 16.22 messages per second.

  • Exchange Server 5.5 maintained an average response time below .3 seconds, but Domino R5’s average client response time increased to over 7 seconds during peak loads.

  • Exchange Server 5.5 was able to service more than 15,000 simulated users at peak load, compared with Domino R5’s 5,000 users.

  • User account and mailbox creation was much faster on Exchange Server 5.5, which created 15,000 test accounts and mailboxes in six minutes. It took approximately 25 hours for Domino R5 to create the same number of accounts and mailboxes.

  • Exchange Server 5.5 required significantly less disk space than Domino R5 for user mailboxes. The study found that after creating and initializing 15,000 user accounts and mailboxes, Domino R5 consumed approximately 90 GB of disk space compared with only 3 GB for Exchange Server 5.5.

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