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Important

Helios features are now enabled during weekly update windows and are no longer directly tied to SingleStore engine releases. Refer to the release notes to view the latest features available in your Helios cluster.

EXPLAIN RESTORE REDUNDANCY

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The EXPLAIN RESTORE REDUNDANCY command returns the set of steps RESTORE REDUNDANCY would run.

Syntax

EXPLAIN RESTORE REDUNDANCY ON db_name

Remarks

  • db_name: name of the SingleStore Helios database.

  • This command must be run on the master aggregator node.

Examples

The following query returns a set of steps that RESTORE REDUNDANCY will run if executed at the same time on trades database.

EXPLAIN RESTORE REDUNDANCY ON trades;
+----------------------+---------+-------------+-------------+-------+
| Action               | Ordinal | Target_Host | Target_Port | Phase |
+----------------------+---------+-------------+-------------+-------+
| COPY PARTITION FORCE |       0 | 127.0.0.1   |        3309 |     2 |
| COPY PARTITION FORCE |       1 | 127.0.0.1   |        3309 |     2 |
| COPY PARTITION FORCE |       2 | 127.0.0.1   |        3309 |     2 |
| COPY PARTITION FORCE |       3 | 127.0.0.1   |        3309 |     2 |
| COPY PARTITION FORCE |       4 | 127.0.0.1   |        3309 |     2 |
| COPY PARTITION FORCE |       5 | 127.0.0.1   |        3309 |     2 |
| COPY PARTITION FORCE |       6 | 127.0.0.1   |        3309 |     2 |
| COPY PARTITION FORCE |       7 | 127.0.0.1   |        3309 |     2 |
+----------------------+---------+-------------+-------------+-------+
8 rows in set (0.01 sec)

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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

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