# 同步任务约束与限制
为保障数据同步任务的正常运行，针对不同的链路，DRS在使用上存在一定的约束与限制。
#### MySQL为源使用须知
**入云**：
- [MySQL同步到MySQL](https://support.huaweicloud.com/realtimesyn-drs/drs_04_0102.html#section3)
- [MySQL同步到TaurusDB](https://support.huaweicloud.com/realtimesyn-drs/drs_03_1124.html)
- [MySQL同步到PostgreSQL](https://support.huaweicloud.com/realtimesyn-drs/drs_04_0103.html#section3)
- [MySQL同步到GaussDB集中式版](https://support.huaweicloud.com/realtimesyn-drs/drs_11_0458.html)
- [MySQL同步到GaussDB分布式版](https://support.huaweicloud.com/realtimesyn-drs/drs_04_0104.html)
**出云：**
- [MySQL同步到MySQL](https://support.huaweicloud.com/realtimesyn-drs/drs_04_0117.html)
- [MySQL同步到Kafka](https://support.huaweicloud.com/realtimesyn-drs/drs_04_0118.html)
- [MySQL同步到Oracle](https://support.huaweicloud.com/realtimesyn-drs/drs_04_0466.html)
**自建-自建：**
- [MySQL同步到Kafka](https://support.huaweicloud.com/realtimesyn-drs/drs_04_0128.html)
- [MySQL同步到GaussDB集中式版](https://support.huaweicloud.com/realtimesyn-drs/drs_04_0510.html)
 
#### PostgreSQL为源使用须知
**入云：**
- [PostgreSQL同步到PostgreSQL](https://support.huaweicloud.com/realtimesyn-drs/drs_04_0107.html)
- [PostgreSQL同步到GaussDB集中式版](https://support.huaweicloud.com/realtimesyn-drs/drs_04_0454.html)
- [PostgreSQL同步到GaussDB分布式版](https://support.huaweicloud.com/realtimesyn-drs/drs_04_0455.html)
**出云：**
- [PostgreSQL同步到PostgreSQL](https://support.huaweicloud.com/realtimesyn-drs/drs_04_0508.html)
- [PostgreSQL同步到Kafka](https://support.huaweicloud.com/realtimesyn-drs/drs_11_0462.html)
**自建-自建：**
- [PostgreSQL同步到Kafka](https://support.huaweicloud.com/realtimesyn-drs/drs_11_0461.html)
 
#### Oracle为源使用须知
**入云：**
- [Oracle同步到MySQL](https://support.huaweicloud.com/realtimesyn-drs/drs_04_0108.html)
- [Oracle同步到TaurusDB](https://support.huaweicloud.com/realtimesyn-drs/drs_04_0110.html)
- [Oracle同步到PostgreSQL](https://support.huaweicloud.com/realtimesyn-drs/drs_04_0446.html)
- [Oracle同步到GaussDB集中式版](https://support.huaweicloud.com/realtimesyn-drs/drs_04_0111.html)
- [Oracle同步到GaussDB分布式版](https://support.huaweicloud.com/realtimesyn-drs/drs_03_1126.html)
- [Oracle同步到DDM](https://support.huaweicloud.com/realtimesyn-drs/drs_04_0112.html)
**自建-自建：**
- [Oracle同步到Kafka](https://support.huaweicloud.com/realtimesyn-drs/drs_04_0109.html)
- [Oracle同步到GaussDB集中式版](https://support.huaweicloud.com/realtimesyn-drs/drs_04_0481.html)
- [Oracle同步到GaussDB分布式版](https://support.huaweicloud.com/realtimesyn-drs/drs_04_0482.html)
 
#### DDM为源使用须知
**入云：**
- [DDM同步到MySQL](https://support.huaweicloud.com/realtimesyn-drs/drs_04_0115.html)
- [DDM同步到GaussDB分布式版](https://support.huaweicloud.com/realtimesyn-drs/drs_04_0583.html)
- [DDM同步到GaussDB集中式版](https://support.huaweicloud.com/realtimesyn-drs/drs_04_0584.html)
- [DDM同步到DDM](https://support.huaweicloud.com/realtimesyn-drs/drs_04_0465.html)
**出云：**
- [DDM同步到MySQL](https://support.huaweicloud.com/realtimesyn-drs/drs_04_0453.html)
- [DDM同步到Oracle](https://support.huaweicloud.com/realtimesyn-drs/drs_04_0119.html)
- [DDM同步到Kafka](https://support.huaweicloud.com/realtimesyn-drs/drs_04_0448.html)
 
#### DB2 for LUW为源使用须知
**入云：**
- [DB2 for LUW同步到GaussDB集中式版](https://support.huaweicloud.com/realtimesyn-drs/drs_04_0471.html)
- [DB2 for LUW同步到GaussDB分布式版](https://support.huaweicloud.com/realtimesyn-drs/drs_04_0472.html)
**自建-自建：**
- [DB2 for LUW同步到GaussDB集中式版](https://support.huaweicloud.com/realtimesyn-drs/drs_04_0485.html)
- [DB2 for LUW同步到GaussDB分布式版](https://support.huaweicloud.com/realtimesyn-drs/drs_04_0486.html)
 
#### TiDB为源使用须知
**入云：**
- [TiDB同步到TaurusDB](https://support.huaweicloud.com/realtimesyn-drs/drs_04_0476.html)
 
#### Microsoft SQL Server为源使用须知
**入云：**
- [Microsoft SQL Server同步到GaussDB集中式版](https://support.huaweicloud.com/realtimesyn-drs/drs_04_0487.html)
- [Microsoft SQL Server同步到GaussDB分布式版](https://support.huaweicloud.com/realtimesyn-drs/drs_04_0488.html)
- [Microsoft SQL Server同步到Microsoft SQL Server](https://support.huaweicloud.com/realtimesyn-drs/drs_04_0489.html)
 
#### MongoDB为源使用须知
**入云：**
- [MongoDB同步到DDS](https://support.huaweicloud.com/realtimesyn-drs/drs_04_0478.html)
 
#### DDS为源使用须知
**出云：**
- [DDS同步到MongoDB](https://support.huaweicloud.com/realtimesyn-drs/drs_04_0464.html)
- [DDS同步到Kafka](https://support.huaweicloud.com/realtimesyn-drs/drs_04_0512.html)
 
#### MariaDB为源使用须知
**入云：**
- [MariaDB同步到MariaDB](https://support.huaweicloud.com/realtimesyn-drs/drs_04_0493.html)
**出云：**
- [MariaDB同步到MariaDB](https://support.huaweicloud.com/realtimesyn-drs/drs_04_0494.html)
 
#### TaurusDB为源使用须知
**入云：**
- [TaurusDB同步到TaurusDB](https://support.huaweicloud.com/realtimesyn-drs/drs_04_0507.html)
**出云：**
- [TaurusDB同步到MySQL](https://support.huaweicloud.com/realtimesyn-drs/drs_04_0468.html)
- [TaurusDB同步到TaurusDB](https://support.huaweicloud.com/realtimesyn-drs/drs_04_0507.html)
- [TaurusDB同步到Oracle](https://support.huaweicloud.com/realtimesyn-drs/drs_04_0467.html)
 
#### GaussDB集中式版为源使用须知
**出云：**
- [GaussDB集中式版同步到MySQL](https://support.huaweicloud.com/realtimesyn-drs/drs_11_0459.html)
- [GaussDB集中式版同步到Oracle](https://support.huaweicloud.com/realtimesyn-drs/drs_11_0435.html)
- [GaussDB集中式版同步到Kafka](https://support.huaweicloud.com/realtimesyn-drs/drs_04_0447.html)
- [GaussDB集中式版同步到GaussDB分布式版](https://support.huaweicloud.com/realtimesyn-drs/drs_04_0449.html)
- [GaussDB集中式版同步到GaussDB集中式版](https://support.huaweicloud.com/realtimesyn-drs/drs_04_0461.html)
**自建-自建：**
- [GaussDB集中式版同步到Oracle](https://support.huaweicloud.com/realtimesyn-drs/drs_04_0473.html)
- [GaussDB集中式版同步到Kafka](https://support.huaweicloud.com/realtimesyn-drs/drs_04_0474.html)
- [GaussDB集中式版同步到GaussDB集中式版](https://support.huaweicloud.com/realtimesyn-drs/drs_04_0500.html)
 
#### GaussDB分布式版为源使用须知
**出云：**
- [GaussDB分布式版同步到MySQL](https://support.huaweicloud.com/realtimesyn-drs/drs_04_0121.html)
- [GaussDB分布式版同步到Oracle](https://support.huaweicloud.com/realtimesyn-drs/drs_11_0436.html)
- [GaussDB分布式版同步到Kafka](https://support.huaweicloud.com/realtimesyn-drs/drs_11_0454.html)
- [GaussDB分布式版同步到GaussDB分布式版](https://support.huaweicloud.com/realtimesyn-drs/drs_11_0442.html)
- [GaussDB分布式版同步到GaussDB集中式版](https://support.huaweicloud.com/realtimesyn-drs/drs_05_0017.html)
**自建-自建：**
- [GaussDB分布式版同步到Oracle](https://support.huaweicloud.com/realtimesyn-drs/drs_04_0496.html)
- [GaussDB分布式版同步到Kafka](https://support.huaweicloud.com/realtimesyn-drs/drs_04_0497.html)
- [GaussDB分布式版同步到GaussDB分布式版](https://support.huaweicloud.com/realtimesyn-drs/drs_04_0502.html)
 
#### Redis单机/主备为源使用须知
**入云：**
[将Redis单机/主备同步到GeminiDB Redis](https://support.huaweicloud.com/realtimesyn-drs/drs_04_0540.html)
[将Redis单机/主备同步到DCS](https://support.huaweicloud.com/realtimesyn-drs/drs_04_0356.html)
#### Redis集群为源使用须知
**入云：**
[将Redis集群同步到GeminiDB Redis](https://support.huaweicloud.com/realtimesyn-drs/drs_04_0541.html)
[将Redis集群同步到DCS](https://support.huaweicloud.com/realtimesyn-drs/drs_04_0357.html)