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---
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stage: Systems
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group: Gitaly
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info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/product/ux/technical-writing/#assignments
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---
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# Praefect Rake tasks **(FREE SELF)**
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> [Introduced](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/28369) in GitLab 12.10.
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Rake tasks are available for projects that have been created on Praefect storage. See the
[Praefect documentation ](../gitaly/praefect.md ) for information on configuring Praefect.
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## Replica checksums
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`gitlab:praefect:replicas` prints out checksums of the repository of a given `project_id` on:
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- The primary Gitaly node.
- Secondary internal Gitaly nodes.
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**Omnibus Installation**
```shell
sudo gitlab-rake "gitlab:praefect:replicas[project_id]"
```
**Source Installation**
```shell
sudo -u git -H bundle exec rake "gitlab:praefect:replicas[project_id]" RAILS_ENV=production
```
