Questions tagged [amazon-dms]

AWS Database Migration Service (AWS DMS)

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How to modify the block size of my S3 parquet files that are being queried in Athena?

I read that adjusting the block size of the parquet files being queried with Athena can affect and possibly improve the performance of the queries. My parquet files for my database are currently ...
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1answer
26 views

Migrate Oracle 12c to 18c in AWS RDS

Currently we have an Amazon RDS Oracle 12c instance and we need to upgrade it to Oracle 18c in a new RDS instance. What is the correct approach to do this? Can we set up an 18c instance staright ...
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49 views

AWS DMS Log growth problem - SQL Server as Source

I have a problem using the AWS Database Migration Service for implementing a transactional replication from SQL Server as a source database engine, a help is highly appreciated. The 'safeguardPolicy' ...
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How to migrate tables with defaults, constraints and sequences with AWS DMS for postgres to postgres migration?

I recently did a migration from a RDS postgresql to Aurora postgresql. The tables were migrated successfully but the tables are missing their defaults, constraints and references. It also did not ...
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43 views

Database mirroring with change history and least performance impact

I have a production DB which I need to effectively mirror and in addition stream changes to applications for their own purposes. (using something like AWS DMS) The catch is that the source database ...
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273 views

Postgresql v10.1 - How to fix ERROR: duplicate key value violates unique constraint

I'm not sure how this happened to this table but have an issue with ERROR: duplicate key value violates unique constraint trying to use AWS's DMS service to move a postgres v10.1 DB to RDS v10 The ...
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1answer
121 views

AWS DMS: 2 million CDCIncomingChanges resolved without target throughput

We're attempting to use AWS DMS to replicate MS-SQL to a customer's on-prem DB, and running into a confusing situation. At 13:00 UTC there are over 2 million CDCIncomingChanges, with CDCTargetLatency ...
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1answer
413 views

Do not replicate Delete operations AWS DMS

I am using AWS DMS to replicate ongoing changes with SQL Server as a source and target endpoint. The tasks are running and replicating data with low latency. However, I need the tasks configured not ...
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1answer
26 views

Redshift is missing in target database list of AWS SCT Schema Convertion Tool

I want to convert schema of SQL Server database to Amazon Redshift using AWS SCT tool But as target database, Redshift is not listed When I use PostgreSQL compatible with IP address of the cluster, ...
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2k views

AWS DMS Fails with “Command failed to load data with exit error code 1”

I am trying to Migrate my Postgresql RDS to Aurora Postgresql using DMS. All my tasks are failing, and I am unable to understand what can be done to help the tasks progress. The error from cloud ...
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1answer
61 views

AWS DMS - How to select different databases for source and target points for a task

Does aws DMS(Data Migration service) allow to select different databases for source and target points for a task in a replication instance? My source engine is MySQL. example: I want to move table A ...
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1answer
280 views

Replication from Amazon's RDS to Postgres via DMS errors out

I have a transactional replication from SQL Server 2008 to RDS SQL Server 2016 in 2014 compatibility mode. This works okay. I now want to replicate this RDS database via DMS to Postgresql. This errors ...
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2answers
2k views

Failure with ongoing replication from SQL Server RDS using AWS DMS

I'm trying to replicate from an SQL Server RDS database using DMS, and running into problems. I am able to load all data from one table into the destination (~1M rows) as a single 'Migrate existing ...
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1answer
4k views

AWS DMS endpoint test connection error

I am trying to migrate Microsoft SQL Server databases from on-premise to an RDS instance. I have created a SQL Server 2014 Express Edition instance in RDS and I have SQL Server 2014 Express Edition on ...
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1answer
973 views

Spike in AWS RDS Oldest Replication Slot lag

Does anyone know about this "Oldest Replication Slot Lag" in AWS RDS? What does it represent? I have a PostgreSQL instance on RDS (with Logical Replication switched on) for transferring data from ...
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1answer
535 views

Create event trigger as non-superuser in Postgres

Is it possible to give a role or a set of attributes to a non-superuser in postgres that would allow the user to create an EVENT TRIGGER? Simple example of what (obviously) doesn't work in psql: =&...
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1answer
245 views

Why did the data type of my DB change?

I had PostgreSQL installation in an EC2 instance. I wanted to migrate to RDS and thus used the DMS service. However, I later came to realize that the data type of the columns have been changed. The ...
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3k views

AWS DMS creates tables with no auto_increment

I am migrating my databases to Amazon's RDS using their DMS tool. Pretty much everything looks great except that columns that were marked as auto_increment on the source database did not get marked ...