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DISTRIBUTED_PARTITIONS

Warning

SingleStore 9.0 gives you the opportunity to preview, evaluate, and provide feedback on new and upcoming features prior to their general availability. In the interim, SingleStore 8.9 is recommended for production workloads, which can later be upgraded to SingleStore 9.0.

This view contains information about partitions.

Column Name

Description

DATABASE_ID

The unique ID of the related database for a given partition.

DATABASE_NAME

The name of the database for the partition.

ORDINAL

The ordinal number for a given partition, which decides the order in which data is distributed among partitions.

HOST

The hostname or IP address for the related node.

PORT

The port number of the related node.

ROLE

The role of the related node.

LOCKED

Whether a given partition is locked, as part of a partition level lock or higher.

NODE_ID

The ID of the related node.

IS_OFFLINE

Whether a given partition is offline.

SYNC_DESIRED

This is TRUE if a given partition instance uses synchronous replication. This matches the column IS_SYNC from information_schema.DISTRIBUTED_DATABASES of the corresponding database.

STATE

The current state of a given partition. This can be EMPTY (for online masters) or

ASYNC - data is asynchronously replicated from the master partition.

SYNC - data is synchronously replicated from the master partition.

READY - a transition state from async to sync replication used to guarantee that replicas are connected and blocking commits if metadata indicates them as sync.

UNRECOVERABLE - due to a bug in writing out log records, or a resource issue that replay fails to handle appropriately, for example, disk IO issue, or out of memory (OOM). No user action can be done to bring it back to any other state.

TERM

The term of the database, used to uniquely identify which node was the master of a specific database.

INSTANCE_ID

Unique ID of the partition instance.

IS_READ_REPLICA

Whether a given partition is part of a read replica or not.

SITE_ID

The ID for the cluster.

SAFE_TS

The lower bound of the pre-prepare timestamps of any unresolved 2PC their participants (reference and partition databases) participate or will participate in.

READ_REPLICA_STATE

This can be used to determine which instance of a partition on a workspace (where a database is mounted read-only), is actually being used for query execution. Relevant for SingleStore Helios.

Last modified: November 1, 2024

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Verification instructions

Note: You must install cosign to verify the authenticity of the SingleStore file.

Use the following steps to verify the authenticity of singlestoredb-server, singlestoredb-toolbox, singlestoredb-studio, and singlestore-client SingleStore files that have been downloaded.

You may perform the following steps on any computer that can run cosign, such as the main deployment host of the cluster.

  1. (Optional) Run the following command to view the associated signature files.

    curl undefined

  2. Download the signature file from the SingleStore release server.

    • Option 1: Click the Download Signature button next to the SingleStore file.

    • Option 2: Copy and paste the following URL into the address bar of your browser and save the signature file.

    • Option 3: Run the following command to download the signature file.

      curl -O undefined

  3. After the signature file has been downloaded, run the following command to verify the authenticity of the SingleStore file.

    echo -n undefined |
        cosign verify-blob --certificate-oidc-issuer https://oidc.eks.us-east-1.amazonaws.com/id/CCDCDBA1379A5596AB5B2E46DCA385BC \
          --certificate-identity https://kubernetes.io/namespaces/freya-production/serviceaccounts/job-worker \
          --bundle undefined \
          --new-bundle-format -
    Verified OK