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Tools: Aggregator Failures

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.

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Master Aggregator Fails

If the Master Aggregator node fails and is recoverable, restart the Master Aggregator.

If it is not recoverable, a Child Aggregator must be promoted to the role of Master Aggregator by running either AGGREGATOR SET AS MASTER in SQL or sdb-admin bootstrap-aggregator on the command line.

One Child Aggregator Fails

If a Child Aggregator is recoverable, restart the Child Aggregator.

If it is not recoverable, deploy a new aggregator by creating a new node and adding it to the cluster as a Child Aggregator.

Many Aggregators Fail

If more than one aggregator fails, each aggregator can either be reintroduced or removed, created, and then replaced one by one.

Last modified: June 22, 2022

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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