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Disk Monitoring

The disk-monitoring feature enables periodic deletion of events based on utilized disk storage.

To limit the disk space used by the VAST database, configure a disk quota:

vast start --disk-quota-high=1TiB

Whenever VAST detects that its database directory has grown to exceed the configured quota, it will erase the oldest data in the database. It is possible to specify an additional --disk-quota-low option to define a corridor for the disk space usage. This can be used to avoid having VAST running permanently at the upper limit and to instad batch the deletion operations together.

The full set of available options looks like this:

vast:
start:
# Triggers removal of old data when the DB dir exceeds the disk budget.
disk-budget-high: 0K
# When the DB dir exceeds the budget, VAST erases data until the directory size
# falls below this value.
disk-budget-low: 0K
# Seconds between successive disk space checks.
disk-budget-check-interval: 90
note

When using this method, we recommend placing the log file outside of the database directory. It counts towards the size calculations, but cannot be automatically deleted during a deletion cycle.