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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 part of the disk space is unavailable for hosting databases. Consider this when choosing a configuration line.

When the cluster disk is 95% full or more, the cluster will enter the DISK_FULL status and become read-only. This is necessary to prevent complete lockout or cluster corruption due to a lack of free space. To make the cluster available for read and write operations, scale the cluster and select a configuration with a larger disk size than in the previous configuration.