# Migrating to Opik 2.0

Opik 2.0 organizes everything around **projects**. Data created after upgrading is automatically project-scoped. Data created on Opik 1.x — datasets, prompts, experiments, optimizations, automation rules, and alerts — requires six background jobs to assign each item to the right project. This page walks you through running those jobs.

:::callout{intent="warning"}
**Upgrading from Opik 1.x with existing data?** Recent Opik images ship the Opik 2.0 UI as the only experience, regardless of your existing entities. 1.x entities that have not yet been assigned to a project (no `project_id`) will not be visible in the 2.0 UI until you run the migration jobs below.
:::

## Before you start

1. **Update to the latest Opik image.** All six migration jobs ship with the 2.0 release. Make sure your `opik-backend` is running the 2.0 image before enabling any flag.
2. **Take a database snapshot.** Each job writes to MySQL or ClickHouse. Back up both before starting — see [Advanced ClickHouse backup](/guides/overview-self-host-backup) for ClickHouse, and use `mysqldump` or your RDS snapshot tooling for MySQL.
3. **Confirm your deployment is healthy.** The `opik-backend` container should be running with no restart loops, and MySQL and ClickHouse should be at baseline load.

## How the jobs work

Each job runs inside `opik-backend` on a 30-second cycle. They are:

- **Safe to run alongside live traffic** — no user-visible locks; users can keep working throughout.
- **Resumable** — stopping a job mid-run and re-enabling it picks up where it left off.
- **Stoppable, not undoable** — already-committed writes stay; there is no rollback mode.

When an item's associated data spans multiple projects, it is assigned to the **dominant project** — the one most referenced by its runs. When no project can be determined at all (no associated runs, or the original project was deleted), it falls back to the workspace's **Default Project**, which is created on demand if missing.

## Order of execution

:::callout{intent="warning"}
Run the jobs in the order below. Datasets, prompts, and optimizations infer their project from
`experiments.project_id`. Starting them before the experiment job finishes silently routes those
items to Default Project with **no retry** — they are not re-evaluated once experiments land
their correct project later.
:::

| Step | Jobs                     | Dependency                     |
| ---- | ------------------------ | ------------------------------ |
| 1    | Experiments              | None — run first               |
| 2    | Datasets, Prompts        | After Step 1 completes         |
| 3    | Optimizations            | After Steps 1 and 2 complete   |
| 4    | Automation Rules, Alerts | Independent — run at any point |

## Step 1 — Experiments

### Enable

::::tabs
:::tab{title="Docker Compose"}
Add to a `docker-compose.override.yml` in your `deployment/docker-compose` directory:

```yaml
services:
  backend:
    environment:
      - EXPERIMENT_PROJECT_MIGRATION_ENABLED=true
```

Apply:

```bash
docker compose -f deployment/docker-compose/docker-compose.yml up -d backend
```
:::

:::tab{title="Kubernetes / Helm"}
Add to your Helm values file:

```yaml
component:
  backend:
    env:
      EXPERIMENT_PROJECT_MIGRATION_ENABLED: "true"
```

Apply:

```bash
helm upgrade opik opik/opik -n opik -f values.yaml
```
:::
::::

### Watch for completion

::::tabs
:::tab{title="Docker Compose"}
```bash
docker compose -f deployment/docker-compose/docker-compose.yml logs -f backend \
  | grep -i "experiment.*migration"
```
:::

:::tab{title="Kubernetes / Helm"}
```bash
kubectl logs -n opik deployment/opik-backend -f | grep -i "experiment.*migration"
```
:::
::::

The job is done when this line appears consistently for several cycles:

```
No workspaces with eligible experiments found, consider disabling the job
```

### Disable

Set `EXPERIMENT_PROJECT_MIGRATION_ENABLED=false` using the same method above and apply. Wait for the completion signal to be stable before moving to Step 2.

## Step 2 — Datasets and prompts

Enable both once Step 1 is complete. They are independent of each other and can run in parallel.

::::tabs
:::tab{title="Docker Compose"}
```yaml
services:
  backend:
    environment:
      - DATASET_PROJECT_MIGRATION_ENABLED=true
      - PROMPT_PROJECT_MIGRATION_ENABLED=true
```

```bash
docker compose -f deployment/docker-compose/docker-compose.yml up -d backend
```
:::

:::tab{title="Kubernetes / Helm"}
```yaml
component:
  backend:
    env:
      DATASET_PROJECT_MIGRATION_ENABLED: "true"
      PROMPT_PROJECT_MIGRATION_ENABLED: "true"
```

```bash
helm upgrade opik opik/opik -n opik -f values.yaml
```
:::
::::

**Completion signals:**

```
No workspaces with eligible datasets found, consider disabling the job
No workspaces with orphan prompts found, consider disabling the job
```

Disable each flag individually once its completion signal is stable before moving to Step 3.

## Step 3 — Optimizations

Enable only after both Step 1 and Step 2 are complete. Optimizations infer their project from both experiments and datasets.

::::tabs
:::tab{title="Docker Compose"}
```yaml
services:
  backend:
    environment:
      - OPTIMIZATION_PROJECT_MIGRATION_ENABLED=true
```

```bash
docker compose -f deployment/docker-compose/docker-compose.yml up -d backend
```
:::

:::tab{title="Kubernetes / Helm"}
```yaml
component:
  backend:
    env:
      OPTIMIZATION_PROJECT_MIGRATION_ENABLED: "true"
```

```bash
helm upgrade opik opik/opik -n opik -f values.yaml
```
:::
::::

**Completion signal:**

```
No workspaces with eligible optimizations found, consider disabling the job
```

Disable the flag once the signal is stable.

## Step 4 — Automation rules and alerts

These jobs inspect project references already stored in their own rows and have no dependency on the other jobs. Run them at any point — before, during, or after Steps 1–3.

::::tabs
:::tab{title="Docker Compose"}
```yaml
services:
  backend:
    environment:
      - AUTOMATION_RULE_PROJECT_MIGRATION_ENABLED=true
      - ALERT_PROJECT_MIGRATION_ENABLED=true
```

```bash
docker compose -f deployment/docker-compose/docker-compose.yml up -d backend
```
:::

:::tab{title="Kubernetes / Helm"}
```yaml
component:
  backend:
    env:
      AUTOMATION_RULE_PROJECT_MIGRATION_ENABLED: "true"
      ALERT_PROJECT_MIGRATION_ENABLED: "true"
```

```bash
helm upgrade opik opik/opik -n opik -f values.yaml
```
:::
::::

**Completion signals:**

```
No workspaces with multi-project automation rules found, consider disabling the job
No workspaces with orphan alerts found, consider disabling the job
```

Disable each flag once done.

## Verifying the migration

Once all six jobs have reported their completion signals and been disabled, run these queries to confirm the result.

**ClickHouse — orphan experiments** (should be 0):

```sql
SELECT countIf(project_id = '') AS orphan_experiments
FROM experiments FINAL;
```

**MySQL — orphan datasets** (should be 0):

```sql
SELECT COUNT(*) FROM datasets WHERE project_id IS NULL OR project_id = '';
```

**MySQL — orphan prompts** (should be 0):

```sql
SELECT COUNT(*) FROM prompts WHERE project_id IS NULL;
```

**ClickHouse — orphan optimizations** (should be 0):

```sql
SELECT countIf(project_id = '') AS orphan_optimizations
FROM optimizations FINAL;
```

**MySQL — multi-project automation rules** (should be 0):

```sql
SELECT COUNT(*) FROM (
  SELECT rule_id FROM automation_rule_projects
  GROUP BY workspace_id, rule_id HAVING COUNT(project_id) > 1
) t;
```

**MySQL — orphan alerts** (should be 0):

```sql
SELECT COUNT(*) FROM alerts WHERE project_id IS NULL;
```

## Troubleshooting

| Symptom                                      | Likely cause                                                          | Action                                                                                                                                                |
| -------------------------------------------- | --------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------- |
| `Could not acquire lock` in logs             | Normal on multi-replica deployments — only one replica runs per cycle | Harmless as long as `success` also appears each cycle                                                                                                 |
| No progress after several cycles             | Flag didn't propagate                                                 | Verify: Docker: `docker compose exec backend env \| grep MIGRATION` · Kubernetes: `kubectl exec deploy/opik-backend -n opik -- env \| grep MIGRATION` |
| Items landed in Default Project unexpectedly | A dependent job ran before its prerequisite finished                  | Use [`opik migrate`](https://www.comet.com/tracing/advanced/migrate-data) to relocate them                                                            |
| High MySQL or ClickHouse load during the run | Too many workspaces per cycle                                         | Contact the Opik team — the batch size defaults are tunable                                                                                           |
| Sustained `error` results in job logs        | Infrastructure or connectivity issue                                  | Disable the job immediately, find the stack trace in the backend logs, resolve the underlying issue, then re-enable                                   |

## Next steps

Once migration is complete, update your SDK and pass `project_name` on your API calls. See [Upgrading to Opik 2.0](/guides/getting-started-opik-v2-upgrade) for the full code reference and examples.

## Related pages

- [.NET](./net-index.md)
- [Administration](./administration-index.md)
- [AI Coding Assistants](./ai-coding-assistants-index.md)
- [Changelog](../changelog.md)
- [Configuration](./configuration-index.md)
- [Contributing](./contributing-index.md)
- [Development](./development-index.md)
- [Evaluation](./evaluation-index.md)
- [Getting Started](./getting-started-index.md)
- [Guardrails](./guardrails-index.md)

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