FAQ - TiDB Forum

Topic	Views	Activity
What is the minimum TiDB/TiKV/PD cluster version supported by TiDB Lightning? lightning	577	January 30, 2023
How should I check whether the upstream and downstream data is consistent? ticdc	728	January 30, 2023
When TiCDC replicates data to Kafka, can I control the maximum size of a single message in TiDB? ticdc	730	January 30, 2023
Why does the latency from TiCDC to Kafka become higher and higher? ticdc	627	January 30, 2023
What is the default behavior of TiCDC if I create a replication task without specifying the configuration file in `--config`? ticdc	623	January 30, 2023
What is `gc-ttl` in TiCDC? ticdc	686	January 30, 2023
Why can't some tables be replicated when I create a task in TiCDC? ticdc	618	January 30, 2023
Does TiCDC replication get stuck if the upstream has long-running uncommitted transactions? ticdc	594	January 30, 2023
Replication of a single table can only be run on a single TiCDC node. Will it be possible to use multiple TiCDC nodes to replicate data of multiple tables? ticdc	616	January 30, 2023
What is the order of executing DML and DDL statements? ticdc	748	January 30, 2023
How should I deploy TiCDC to replicate data between two TiDB cluster located in different regions? ticdc	654	January 30, 2023
After a changefeed resumes from pause, its replication latency gets higher and higher and returns to normal only after a few minutes. Why? ticdc	560	January 30, 2023
Why does replication using TiCDC stall or even stop after data restore using TiDB Lightning and BR from upstream? ticdc	422	January 30, 2023
Why does TiCDC use disks? When does TiCDC write to disks? Does TiCDC use memory buffer to improve replication performance? ticdc	465	January 30, 2023
When the sink of the replication downstream is TiDB or MySQL, what permissions do users of the downstream database need? ticdc	432	January 30, 2023
Why do `INSERT`/`UPDATE` statements from the upstream become `REPLACE INTO` after being replicated to the downstream if I set `enable-old-value` to `true` when I create a TiCDC replication task? ticdc	469	January 30, 2023
The default value of the time type field is inconsistent when replicating a DDL statement to the downstream MySQL 5.7. What can I do? ticdc	461	January 30, 2023
How much PD storage does TiCDC use? ticdc	477	January 30, 2023
When TiCDC replicates data to Kafka, how do I know the timestamp of the data changes in a message? ticdc	456	January 30, 2023
When TiCDC replicates data to Kafka, does a message contain multiple types of data changes? ticdc	437	January 30, 2023
If I modify a row multiple times in a transaction, will TiCDC output multiple row change events? ticdc	424	January 30, 2023
How to understand the relationship between the TiCDC time zone and the time zones of the upstream/downstream databases? ticdc	447	January 30, 2023
What is the complete behavior of TiCDC garbage collection (GC) safepoint? ticdc	633	January 30, 2023
How do I choose `start-ts` when creating a task in TiCDC? ticdc	519	January 30, 2023
Why does the load unit report the `Unknown character set` error? dm	443	January 30, 2023
How to handle the returned error when executing start-relay command for DM versions from 2.0.2 to 2.0.6? dm	563	January 30, 2023
Why does the Grafana dashboard of a DM cluster display `failed to fetch dashboard` if the cluster is deployed using TiUP v1.3.0 or v1.3.1? dm	494	January 30, 2023
Why does DM report the error `ERROR 1236 (HY000): The slave is connecting using CHANGE MASTER TO MASTER_AUTO_POSITION = 1, but the master has purged binary logs containing GTIDs that the slave requires.` if it restarts during an incremental task? dm	488	January 30, 2023
In DM v2.0, why does the full import task fail if DM restarts during the task? dm	474	January 30, 2023
Why do `REPLACE` statements keep appearing in the downstream when DM is replicating? dm	422	January 30, 2023