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Using disk space in an OpenSearch cluster

In Managed Databases, part of the disk space is reserved for service needs:

  • for the file system — 4% of the disk volume;
  • for the operating system, service components, and logs — 8 GB.

The reserved portion of the disk space is not available to host databases. Take this into account when selecting a configuration lineup.

When the cluster disk is 95% full or more, the cluster will enter a DISK_FULL status and will operate in read-only mode. This is necessary to prevent a total lockup or damage to the cluster due to lack of free space. To have the cluster operate in read-write mode, scale the cluster and select a configuration with a larger disk size than the previous one.