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Lock-free Backups

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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Lock-free backups do not block INSERT, UPDATE, and DELETE operations at any point during a backup. They do not need to lock and wait for write queries. Lock-free backups are enabled by default

However, ALTER DATABASE and SNAPSHOT commands will not run while there is a backup job active on the relevant database. The backup takes the cluster operations lock for the entirety of the backup.

Commands Blocked by the BACKUP Process

  • ALTER DATABASE

  • DROP DATABASE

  • SNAPSHOT DATABASE

Commands Not Blocked by the BACKUP Process

  • CREATE TABLE (columnstore and rowstore)

  • ALTER TABLE (columnstore and rowstore)

  • DROP TABLE (columnstore and rowstore)

  • DELETE TABLE

  • INSERT TABLE

  • TRUNCATE TABLE (columnstore and rowstore)

  • CREATE INDEX

  • DROP INDEX (columnstore and rowstore)

  • CREATE VIEW

  • DROP VIEW

  • ANALYZE TABLE (columnstore and rowstore)

  • OPTIMIZE COLUMNSTORE TABLE

  • SHOW TABLE STATUS

  • SHOW DATABASE STATUS

  • OPTIMIZE ROWSTORE TABLE

Last modified: February 29, 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