PERFORMANCE

R5IMAP workload
The R5IMAP workload models an active IMAP mail user logging in once, then receiving and sending mail. The script contains an average of 15 minutes of waiting, so an average user will execute this test no more than four times an hour. For each iteration of the script, IMAP mail messages are retrieved, one SMTP message is sent, and a number of LDAP lookup requests are executed based on the value of the NumMessageRecipients script variable. The SMTP messages sent by each test user are delivered to the mail databases of other test users on the SUT.

The measurements obtained by this test are:


The resulting capacity metric for an IMAP server is the maximum number of users that can be supported before the average user response time becomes unacceptable.

Hardware considerations

The following hard disk requirements apply to the SUT and, during some tests, to the destination systems that receive mail from the SUT:
Initial Disk RequirementIn IBM® Lotus® Domino® 6 or more recent, approximately 13MB on the SUT for each user (mail database). In Domino 5, approximately 5.5MB.
Subsequent Disk RequirementIncrease of 1MB an hour for the duration of the test. (This figure is not dependent on the number of users.)

Increase of 100KB an hour as impacted by the value of the nthIteration setting in the NOTES.INI file.

The growth rate of each database is a function of the ratio of the number of users and recipients sending and receiving mail.



Tips for running the R5IMAP Workload test

1. Use these server commands.
CommandDescription
Show TaskShow either the Database Server task (Notes clients) or IMAP task (IMAP users).
Show Stat IMAPMonitor message counters
Show Stat MailMonitor message counters
Show Stat SMTPMonitor SMTP statistics
Show Stat LDAPMonitor LDAP statistics
2. Use an IMAP client, such as Outlook, to verify that the IMAP and SMTP server tasks are set up correctly.

3. To minimize environment troubleshooting, put IP information -- for example, host information -- in the \etc\hosts file or its equivalent on the SUT and driver directories.

4. From the SUT console, enter this command to display additional routing information:


Running the R5 IMAP workload

1. Make sure that you already completed the procedure to run the R5IMAP Initialization workload.

For more information about the R5IMAP Initialization workload, see the topic R5IMAP Initialization workload.

2. In the NOTES.INI file on the SUT, verify that the Server Tasks setting includes both IMAP and LDAP.

3. On the Basics tab of the Server document for the SUT, make sure that the SMTP Listener Task is enabled.

4. For optimal performance, create a Configuration Settings document in the IBM® Lotus® Domino® Directory and do the following:

5. On the Domino Administrator client, start Server.Load.

6. In the Test Type field, choose Built-In, and then choose R5 IMAP workload from the list.

7. In the "Build Recipient List using Name and Address Book" field, enter the name of the SUT and its Domino Directory in the format servername/org!!dominodirectory.NSF -- for example, Server1/Acme!!NAMES.NSF.

8. Click the Test Parameters tab, and do the following:

9. Click the Script Variables tab, and enter these values:
VariableAction
R5IMAPBreakEnter one of these:
  • 1 -- To prevent the script from quitting if errors occur
  • 0 -- To force the script to quit if errors occur
IMAPHostEnter the fully-qualified domain name of the SUT -- for example, server1.acme.com
NormalMessageSizeEnter the size of the body of the message. Recommended value is 10000.
MessageLineSizeEnter the number of characters per line. Recommended value is 80.
NumMessageRecipientsEnter the number of recipients for each message. Recommended value is 3.
RecipientDomainEnter the name of the domain containing the intended recipients -- for example, acme.com.
SMTPHostEnter the fully-qualified domain name of the Domino server that is running the SMTP Listener task -- for example, server1.acme.com
ClientHostEnter the fully-qualified domain name of the client -- for example, client1.acme.com
NthIterationEnter the frequency for how often a message is sent. Instead of the message being sent on every script iteration, the message is sent once per n iterations of the script. Recommended value is 6.
R5IMAP_Loop_NEnter the number of times the inner loop of the script runs. Recommended value is 35, resulting in approximately an 8-hour duration.
ScriptIterationLimitEnter the number of times the outer loop of the script runs. Recommended value is 1.
10. (Optional) Click the Stop Conditions tab to set a stop condition.

11. Click Execute.

12. (Optional) Select metrics to monitor.

13. (Optional) In the "Server to receive console commands" field, enter the name of the SUT.

14. Click Start Test.

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