[Yandex Cloud documentation](../../index.md) > [Yandex Data Transfer](../index.md) > Concepts > Resource relationships
# Resource relationships in Data Transfer
Yandex Data Transfer helps transfer data between DBMS, object storages, and message brokers. This way you can reduce the migration period and minimize downtime when switching to a new database.
Yandex Data Transfer is configurable via Yandex Cloud standard interfaces.
The service is suitable for creating a permanent replica of the database. The transfer of the database schema from the source to the target is automated.
## Endpoint {#endpoint}
An _endpoint_ is a configuration used to connect to a service: _datasource_ or _target_. In addition to connection settings, the endpoint may contain information about which data will be involved in the transfer and how it should be processed during the transfer.
The following can be the data source or target:
| Service | Source | Target |
|---------------------------------------------------------------------------------------------------------------------------------------|:----------------------------------------------------------------------:|:------------------------------------:|
| Apache Kafka® topic: Your own or as part of [Managed Service for Apache Kafka®](../../managed-kafka/index.md) |  |  |
| AWS CloudTrail message stream |  |  |
| Your own BigQuery database |  |  |
| ClickHouse® database: Your own or as part of [Managed Service for ClickHouse®](../../managed-clickhouse/index.md) |  |  |
| Your own Elasticsearch database |  |  |
| Greenplum® database: Your own or as part of [Yandex MPP Analytics for PostgreSQL](../../managed-greenplum/index.md) |  |  |
| MongoDB database: Your own or as part of [Yandex StoreDoc](../../storedoc/index.md) |  |  |
| MySQL® database: Your own or as part of [Managed Service for MySQL®](../../managed-mysql/index.md) |  |  |
| Your own Oracle database |  |  |
| PostgreSQL database: Your own or as part of [Managed Service for PostgreSQL](../../managed-postgresql/index.md) |  |  |
| OpenSearch database: Your own or as part of [Managed Service for OpenSearch](../../managed-opensearch/index.md) |  |  |
| S3-compatible bucket |  |  |
| [Yandex Data Streams](../../data-streams/index.md) data stream |  |  |
| Managed Service for YDB database: as part of [Managed Service for YDB](../../ydb/index.md). |  |  |
| [Yandex Object Storage](../../storage/index.md) bucket |  |  |
|
### Endpoint statuses {#statuses}
As part of the Data Transfer [transition](../release-notes/2501.md) to [asynchronous operations](../../api-design-guide/concepts/async.md) with endpoints, we introduce endpoint statuses as follows:
* **Ready**: Endpoint is ready to use.
* **Creating**: Endpoint create operation has started. When the operation is complete, the endpoint status changes to **Ready**.
* **Updating**: Endpoint update operation has started. When the operation is complete, the endpoint status changes to **Ready**.
* **Deleting**: Endpoint delete operation has started.
{% note info %}
All new endpoints you create will be asynchronous. Older endpoints will remain synchronous and can only have the **Ready** status.
{% endnote %}
## Transfer {#transfer}
_Transfer_ is the process of transmitting data between the source and target service. It should be in the same folder as the endpoints used.
If subnets are specified for endpoints, these subnets must be hosted in the same [availability zone](../../overview/concepts/geo-scope.md). Otherwise, activating the transfer with such endpoints will result in an error.
## Transfer computing resources {#runtime}
For [billable](../pricing.md) source-target pairs at the [GA](../../overview/concepts/launch-stages.md) stage, you can configure the amount of computing resources in the **Runtime environment** section.
For **Snapshot and increment** transfers, resources for the copy and replication stages are specified independently. The following configurations are available:
* 2 vCPUs and 4 GB RAM. This is the default configuration.
* 4 vCPUs and 8 GB RAM.
* 8 vCPUs and 16 GB RAM.
Resource configurations affect the performance of _workers_, i.e., utility processes responsible for initiating data migration within a transfer. For each worker, a dedicated VM is provisioned.{#worker}
vCPU count and RAM size impact the [cost of Data Transfer resources](../pricing.md). To optimize usage and data transfer costs, we recommend using workers efficiently by reducing their number and increasing the load on each worker.
### Transfer types {#transfer-type}
The following types of transfers are available:
* _**Snapshot**_: Transfers a snapshot of the source to the target. Apart from a one-time snapshot transfer, there are copy types, such as _Regular_ and _Regular incremental_.
* _**Replication**_: Continuously receives changes from the source and applies them to the target. Initial data synchronization is not performed.
* _**Snapshot and increment**_: Transfers the current state of the source to the target and keeps it up-to-date.
For more information about the differences between transfer types, see [Transfer types and lifecycles](transfer-lifecycle.md).
### Compatibility of sources and targets {#connectivity-matrix}
Possible source and target combinations:
| 
Target
Source
 | 
[PostgreSQL](../operations/endpoint/target/postgresql.md) | 
[MySQL®](../operations/endpoint/target/mysql.md) | 
[MongoDB](../operations/endpoint/target/mongodb.md) | 
[ClickHouse®](../operations/endpoint/target/clickhouse.md) | 
[Greenplum®](../operations/endpoint/target/greenplum.md) | 
[YDB](../operations/endpoint/target/yandex-database.md) | 
[Object Storage](../operations/endpoint/target/object-storage.md) | 
[Apache Iceberg™](../operations/endpoint/target/iceberg.md) | 
[Apache Kafka](../operations/endpoint/target/kafka.md) | 
[Data Streams](../operations/endpoint/target/data-streams.md) | 
[Elasticsearch](../operations/endpoint/target/elasticsearch.md) | 
[OpenSearch](../operations/endpoint/target/opensearch.md) | 
[YTsaurus](../operations/endpoint/target/yt.md) | 
Target
Source
 |
|:------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------:|:-----------------------------------------------------------------------------------------------------------------------------------------------------:|:--------------------------------------------------------------------------------------------------------------------------------------:|:--------------------------------------------------------------------------------------------------------------------------------------------:|:------------------------------------------------------------------------------------------------------------------------------------------------------------------:|:--------------------------------------------------------------------------------------------------------------------------------------------------:|:-----------------------------------------------------------------------------------------------------------------------------------------------------------:|:-----------------------------------------------------------------------------------------------------------------------------------------------------------------------:|:-----------------------------------------------------------------------------------------------------------------------------------------------------:|:-------------------------------------------------------------------------------------------------------------------------------------------------------------:|:-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------:|:--------------------------------------------------------------------------------------------------------------------------------------------------------------:|:-----------------------------------------------------------------------------------------------------------------------------------------------------:|:----------------------------------------------------------------------------------------------------------------------------------------:|:------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------:|
| 
[PostgreSQL](../operations/endpoint/source/postgresql.md) | [CR](../tutorials/managed-postgresql.md)
 | [CR](../tutorials/mpg-to-mmy.md) | - | [CR](../tutorials/rdbms-to-clickhouse.md)
 | [C](../tutorials/managed-greenplum.md)R | [CR](../tutorials/mpg-to-ydb.md) | [C](../tutorials/mpg-to-objstorage.md) | C | [CR](../tutorials/cdc-mpg.md)
 | [CR](../tutorials/mpg-to-yds.md) | C | [C](../tutorials/postgresql-to-opensearch.md) | CR | 
[PostgreSQL](../operations/endpoint/source/postgresql.md) |
| 
[MySQL®](../operations/endpoint/source/mysql.md) | [CR](../tutorials/mmy-to-mpg.md) | [C](../tutorials/managed-mysql.md)R
 | - | [CR](../tutorials/mysql-to-clickhouse.md)
 | [CR](../tutorials/mmy-to-mgp.md) | [CR](../tutorials/managed-mysql-to-ydb.md) | [C](../tutorials/mmy-objs-migration.md) | K | [CR](../tutorials/cdc-mmy.md)
 | [CR](../tutorials/mmy-to-yds.md) | - | - | CR | 
[MySQL®](../operations/endpoint/source/mysql.md) |
| 
[Oracle](../operations/endpoint/source/oracle.md) | CR | - | - | CR | CR | - | - | C | - | - | - | - | CR | 
[Oracle](../operations/endpoint/source/oracle.md) |
| 
[MongoDB](../operations/endpoint/source/mongodb.md) | - | - | [CR](../tutorials/storedoc.md)
 | - | - | - | C | K | | - | - | - | CR | 
[MongoDB](../operations/endpoint/source/mongodb.md) |
| 
[ClickHouse®](../operations/endpoint/source/clickhouse.md) | - | - | - | [C](../tutorials/managed-clickhouse.md)
 | - | - | - | C | - | - | - | - | C | 
[ClickHouse®](../operations/endpoint/source/clickhouse.md) |
| 
[Greenplum®](../operations/endpoint/source/greenplum.md) | [C](../tutorials/greenplum-to-postgresql.md) | - | - | [C](../tutorials/greenplum-to-clickhouse.md)
 | [C](../tutorials/managed-greenplum.md) | - | - | K | - | - | - | - | C | 
[Greenplum®](../operations/endpoint/source/greenplum.md) |
| 
[YDB](../operations/endpoint/source/ydb.md) | CR | - | - | [CR](../tutorials/ydb-to-clickhouse.md) | - | - | [C](../tutorials/ydb-to-object-storage.md) | K | [CR](../tutorials/cdc-ydb.md) | [CR](../tutorials/ydb-to-yds.md) | - | - | CR | 
[YDB](../operations/endpoint/source/ydb.md) |
| 
[Object Storage](../operations/endpoint/source/object-storage.md) | [CR](../tutorials/object-storage-to-postgresql.md) | [CR](../tutorials/objs-mmy-migration.md) | - | [CR](../tutorials/object-storage-to-clickhouse.md) | [CR](../tutorials/object-storage-to-greenplum.md) | [CR](../tutorials/object-storage-to-ydb.md) | - | C | - | - | - | - | CR | 
[Object Storage](../operations/endpoint/source/object-storage.md) |
| 
[Metrica](../operations/endpoint/source/metrika.md) | - | - | - | [R](../tutorials/metrika-to-clickhouse.md) | - | - | - | - | - | - | - | - | - | 
[Metrica](../operations/endpoint/source/metrika.md) |
| 
[Data Streams](../operations/endpoint/source/data-streams.md) | R | R | R | [R](../tutorials/yds-to-clickhouse.md)
 | R | [R](../tutorials/yds-to-ydb.md)
 | [R](../tutorials/yds-to-objstorage.md) | - | [R](../tutorials/yds-to-kafka.md)
 | R | R | R | - | 
[Yandex Data Streams](../operations/endpoint/source/data-streams.md) |
| 
[Apache Kafka®](../operations/endpoint/source/kafka.md) | [R](../tutorials/mkf-to-mpg.md) | [R](../tutorials/mkf-to-mmy.md) | [R](../tutorials/mkf-to-mmg.md) | [R](../tutorials/mkf-to-mch.md) | [R](../tutorials/managed-kafka-to-greenplum.md) | [R](../tutorials/mkf-to-ydb.md)
 | R | - | [R](../tutorials/mkf-to-mkf.md)
 | [R](../tutorials/mkf-to-yds.md) | R | [R](../tutorials/mkf-to-mos.md) | R | 
[Apache Kafka®](../operations/endpoint/source/kafka.md) |
| 
[Airbyte®](#airbyte) | C^1^ | C^1^ | C | C^1^ | C^1^ | C^1^ | - | - | C^1^ | - | - | - | - | 
[Airbyte®](#airbyte) |
| 
[Elasticsearch](../operations/endpoint/source/elasticsearch.md) | C | - | - | C | C | C | C | C | C | C | C | C | - | 
[Elasticsearch](../operations/endpoint/source/elasticsearch.md) |
| 
[OpenSearch](../operations/endpoint/source/opensearch.md) | C | - | - | [C](../tutorials/opensearch-to-clickhouse.md) | [C](../tutorials/opensearch-to-greenplum.md) | [C](../tutorials/opensearch-to-ydb.md) | [C](../tutorials/opensearch-to-object-storage.md) | - | C | C | C | [C](../tutorials/os-to-mos.md) | - | 
[OpenSearch](../operations/endpoint/source/opensearch.md) |
| 
[YTsaurus](../operations/endpoint/source/yt.md) | C | - | - | C | C | C | - | K^1^ | - | - | - | - | - | 
[YTsaurus](../operations/endpoint/source/yt.md) |
| 
Source
Target
 | 
[PostgreSQL](../operations/endpoint/target/postgresql.md) | 
[MySQL®](../operations/endpoint/target/mysql.md) | 
[MongoDB](../operations/endpoint/target/mongodb.md) | 
[ClickHouse®](../operations/endpoint/target/clickhouse.md) | 
[Greenplum®](../operations/endpoint/target/greenplum.md) | 
[YDB](../operations/endpoint/target/yandex-database.md) | 
[Object Storage](../operations/endpoint/target/object-storage.md) | 
[Apache Iceberg™](../operations/endpoint/target/iceberg.md) | 
[Apache Kafka](../operations/endpoint/target/kafka.md) | 
[Data Streams](../operations/endpoint/target/data-streams.md) | 
[Elasticsearch](../operations/endpoint/target/elasticsearch.md) | 
[OpenSearch](../operations/endpoint/target/opensearch.md) | 
[YTsaurus](../operations/endpoint/target/yt.md) | 
Source
Target
 |
C: [Copy](transfer-lifecycle.md#copy)
R: [Replicate](transfer-lifecycle.md#replication)
CR: [Copy and replicate](transfer-lifecycle.md#copy-and-replication)
"—": Transfer not implemented
^1^: This feature is at the [Preview](../../overview/concepts/launch-stages.md) stage, available on request. Contact [support](https://center.yandex.cloud/support) or your account manager.
: Transfer is at the [GA](../../overview/concepts/launch-stages.md) stage and charged as per the relevant [pricing policy](../pricing.md).
The remaining transfers are at the [Preview](../../overview/concepts/launch-stages.md) stage; you can activate them through a request to our [technical support](https://center.yandex.cloud/support) or your account manager.
#### Airbyte® endpoints {#airbyte}
You can use [Airbyte®](https://docs.airbyte.com/integrations/sources) to configure the following source endpoints:
* [AWS CloudTrail](../operations/endpoint/source/aws-cloudtrail.md)
* [BigQuery](../operations/endpoint/source/bigquery.md)
* [Microsoft SQL Server](../operations/endpoint/source/mssql.md)
* [S3](../operations/endpoint/source/s3.md)
Airbyte® is already built into Data Transfer, so you do not have to create a separate VM and deploy Airbyte®.
#### YTsaurus endpoints {#ytsaurus}
You can use [YTsaurus](https://ytsaurus.tech/docs/ru/) to configure the following target endpoints:
* [YTSaurus Dynamic](../operations/endpoint/target/yt.md)
* [YTSaurus Static](../operations/endpoint/target/yt.md)
_ClickHouse® is a registered trademark of [ClickHouse, Inc](https://clickhouse.com)._
## Use cases {#examples}
* [Data Transfer tutorials](../tutorials/index.md)
* [Step-by-step guides for Data Transfer](../operations/index.md)