## Understand migrating from jdbc-metadata-extractor to SDR

URL: https://docs.atlan.com/product/connections/concepts/understand-migrating-jdbc-to-sdr

> What changes and what stays the same when migrating on-premises JDBC database extraction from jdbc-metadata-extractor to Self-Deployed Runtime.

The `jdbc-metadata-extractor` is a standalone tar file that runs on your infrastructure and extracts metadata from on-premises databases without a direct connection from Atlan Cloud. Self-Deployed Runtime (SDR) is its successor—it provides the same capability with improved security, automated credential handling, and near-instant job pickup.

## What changes

| Area | jdbc-metadata-extractor | SDR |
|---|---|---|
| Deployment | Docker Compose services started manually from the tar file | Dedicated connector app container, installed from the Atlan Marketplace |
| Credentials | Set as environment variables in the Docker Compose file | Fetched at runtime from your secret store (AWS Secrets Manager, GCP Secret Manager, Azure Key Vault, HashiCorp Vault, or env vars) |
| Auth to Atlan | Long-lived API key (`VAR_ATLAN_TOKEN`) | Per-deployment OAuth credentials with autorefreshing short-lived tokens |
| Source filtering | `INCLUDE_FILTER_TEMPLATE` and `EXCLUDE_FILTER_TEMPLATE` env vars: regex patterns for databases and schemas (for example, `{"^DB1$": ["^SCHEMA1$"]}`) | Configured as include and exclude filter fields in the Atlan UI workflow form |
| System object exclusions | `SYSTEM_SCHEMA_REGEX`, `SYSTEM_DATABASE_REGEX`, and `TEMP_TABLE_REGEX` env vars | Configured as exclusion pattern fields in the Atlan UI workflow form |
| Firewall | Outbound HTTPS to `<tenant>.atlan.com:443` | Outbound HTTPS to `<tenant>.atlan.com:443` + outbound gRPC/TLS to `<tenant>-temporal.atlan.com:443` |

**What stays the same:** Firewall rules to your source databases, object storage bucket, secret store paths, and source system credentials.

## See also

- [Migrate from jdbc-metadata-extractor to Self-Deployed Runtime](https://docs.atlan.com/llms/catalog/connector-capabilities/migrate-jdbc-to-sdr/llms.txt)

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