Jul 27, 2018 · When the full load for a given table is complete, AWS DMS immediately begins to apply the cached changes for that table. When all tables have been loaded, AWS DMS begins to collect changes as transactions for the ongoing replication phase. After AWS DMS applies all cached changes, tables are transactionally consistent.

AWS DMS (source MongoDB, target PostgreSQL) need to extract info from _doc column using transformation rule, in document mode 0 AWS DMS Migration Task Fails with "No Tables Found" Using Wildcard in Schema Mapping for MySQL.

May 20, 2019 · Following additional insights have been provided by AWS to estimate the actual memory requirements: Full LOB mode (using single row insert+update, commit rate) Memory: (# of lob columns in a table) x (Number of table in parallel, default is 8) x (lob chunk size) x (Commit rate during full load) = 2 * 8 *64(k) * 10000k

Jan 25, 2023 · AWS DMS needs special permissions for users used by the AWS DMS endpoint connectors. For the source you will need REPLICATION CLIENT, REPLICATION SLAVE, SUPER permissions. You could review all details on the link below. Using any MySQL-compatible database as a source for AWS DMS

Mar 2, 2023 · I have an AWS DMS database migration task running Full Load and Replication. The source is RDS (Aurora PostgreSQL) and I have pglogical configured. The task ran the initial load just fine, and replication was working until we changed the name of one table in the source database, and dropped another table. At this point the task started failing.

Aug 26, 2021 · You can start the diagnosis with AWS CLI command aws dms describe-table-statistics --replication-task-arn arn:<<your replication task arn>> Also, for more details, please refer Troubleshoot an AWS DMS task validation failure here

Mar 21, 2021 · The replication instance is an dms.r5.xlarge on DMS version 3.4.3. Everytime it fails we just upgrade the instance size (according to solutions seen online), but I'm afraid that this problem will just persist.

Dec 23, 2021 · I'm using AWS DMS to CDC from MySQL on-premise database to AWS S3. Is it feasible to transfer only a few columns from the source table to target? I have a table with more than 50 columns and only need 10. If I want to transfer 5 tables from the source, is it best practice to create 1 replication task for each table, or put all 5 in one?

Jul 31, 2023 · According to this SO post aws-dms-endpoint-connection-to-redshift-not-working (and some AWS docs as well), I need 2 more roles: dms-cloudwatch-logs-role dms-access-for-endpoint. Not sure where to find the policy settings for these, or if they are covered by the policies I created above. I believe they are covered, but correct me if not.

May 4, 2021 · I also attempted to delete the dms tasks using the aws cli and get the same result. The event log for DMS shows the following: dms-copy-task replication-task May 3, 2021, 22:48:37 (UTC-04:00) Failed to clean task resources for task dms-copy-task during task deletion dms-copy-task replication-task May 3, 2021, 22:47:06 (UTC-04:00) Replication ...