Changing performance data expiration times
About this task
Performance data stored in OpsCenter expires after configurable time periods. The default values are designed to provide efficient compaction and eventual deletion of the data, with faster expiration times for the more granular, larger-volume data roll-ups.
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One-minute roll-ups (1min_ttl) expire after one week, or 604800 seconds.
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Five-minute roll-ups (5min_ttl) expire after four weeks, or 2419200 seconds.
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Two-hour roll-ups (2hr_ttl) expire after one year, or 31536000 seconds.
To change expiration time period:
In this example, the one-minute and five-minute roll-ups are set to expire twice as fast as the defaults, two-hour roll-ups are set to be kept indefinitely (expiration is disabled), and the 24 hour roll-ups are not going to be stored.
Procedure
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Locate the cluster_name.conf file. The location of this file depends on the type of installation:
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Package installations: /etc/opscenter/clusters/cluster_name.conf
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Tarball installations: install_location/conf/clusters/cluster_name.conf
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Edit the cluster_name.conf file.
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Add the following time-to-live (ttl) values in seconds under a
[cassandra_metrics]section:[cassandra_metrics] 1min_ttl = 302400 5min_ttl = 1209600 2hr_ttl = 0 24hr_ttl = 0
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Data collected after restarting OpsCenter expires according to the new settings. The data collected before restarting OpsCenter expires according to the setting in effect when it was collected.
