AVX2 Instruction Set Verification

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SingleStore can take advantage of the AVX2 instruction set on Intel and Intel-compatible processors to improve the performance of columnstore query processing and enable the use of certain vector functions.

Verify AVX2 Support

A host’s support for the AVX2 instruction set can be verified in a number of ways:

Checking the host's processor specifications from the manufacturer.
Running either of the following on the command line and confirming that avx2 is listed.
Shell
```
lscpu | grep avx2
```
Shell
```
cat /proc/cpuinfo | grep avx2
```
Deploying a new SingleStore cluster, where Toolbox automatically checks for avx2 support.
Running check_avx2 from the singlestoredb-server-<version>-<hash>/lib directory on each host in an existing SingleStore cluster.

AVX2 is supported if check_avx2 does not produce any output, does not produce an error, or does not fail.
- Typical package-based deployment location
  - /opt/singlestoredb-server-<version>-<hash>/lib/check_avx2
- Typical tarball-based deployment locations
  - /opt/singlestore/singlestoredb-server-<version>-<hash>/lib/check_avx2
  - /home/memsql/memsql/singlestoredb-server-<version>-<hash>/lib/check_avx2
- You may also find the location of the singlestoredb-server-<version>-<hash> directory by viewing the process status of memsqld.
  Shell
```
ps -ef | grep memsqld
```
```
/opt/singlestore/singlestoredb-server-<version>-<hash>/memsqld
```

Last modified: April 12, 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.

(Optional) Run the following command to view the associated signature files.
Shell
```
curl undefined
```
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.
  Shell
```
curl -O undefined
```

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

Shell

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