Failed tests (time-out):
Tests may time-out and get marked as failed. If any of the tests take more than 15 minutes
it may get purged from an internal current test list. For example, a test may be
successfully sent to a router and the system does not receive any results for 15 minutes.
The system marks the test as failed and purges its’ expectation of receiving a result.
However, later, the system could still receive the results from the router and update its
result for the test to success.
Disk space requirements for STM test results
STM test results are stored in the tablespace DB partition. The STM database partitions
start with a total size of 300MB of disk space. When the maximum number of test results
is configured at 40,000,000 (maximum), the disk space requirement for the STM tests
may increase by up to 80GB. A larger tablespace partition should be considered.
The maximum number of test results stored in the database reflects the sum of the
aggregate results, test results, and probe results.
Running 10 tests with 1 probe each versus 1 test with 10 probes consumes the same
amount of disk space.
When using logToFile for accounting file STM test results, the maximum time-to-live on
the disk is 24 hours. At the maximum collection rate of 500,000 test results per 10
minutes, the storage requirements on the 5620 SAM Server in the xml_output directory is
300GB per JMS client. The storage requirements are doubled if using the maximum
number of JMS clients for file accounting STM results. The disk storage requirements can
be decreased by using the compress option for logToFile but will result in increased CPU
utilization on the SAM Server.
Scaling
Scaling guidelines for scheduled tests (STM)
Scaling guidelines for scheduled tests (STM)
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5620 SAM
3HE-09809-AAAG-TQZZA 13.0 R7
Issue 1
December 2015
6-21
