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---
stage: Systems
group: Gitaly
info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://handbook.gitlab.com/handbook/product/ux/technical-writing/#assignments
---
# Praefect Rake tasks
DETAILS:
**Tier:** Free, Premium, Ultimate
**Offering:** Self-managed
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.
## Replica checksums
`gitlab:praefect:replicas` prints out checksums of the repository of a given `project_id` on:
- The primary Gitaly node.
- Secondary internal Gitaly nodes.
Run this Rake task on the node that GitLab is installed and not on the node that Praefect is installed.
- Linux package installations:
```shell
sudo gitlab-rake "gitlab:praefect:replicas[project_id]"
```
- Self-compiled installations:
```shell
sudo -u git -H bundle exec rake "gitlab:praefect:replicas[project_id]" RAILS_ENV=production
```
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