My team is planning to migrate from azure sql dw to azure synapse.I dont see any strong points to do it.
Any who has done this before.
I want to know when we to consider for migration
Related
I am working on both PaaS databases of Azure, i.e., Azure SQL Database and Azure SQL Managed Instance. Basic doubt is that both are 'managed' by Azure. Then why the word 'managed' is attached only to the Azure Managed Instance? Either it should be 'Azure SQL Database and Azure SQL Instance' or 'Azure SQL Managed Database and Azure SQL Managed Instance'.
The doubt may be silly. But when explaining to newbies, they get confused with the phrases 'fully managed' and 'managed instance'.
Marketing people pick the names. Don’t read too much into it. They are both “managed”.
I try to use Serverless Sql Pool Integration dataset in Azure Analitycs DataFlow as a source but I can't. SQL Pool is unavailable as a Source in DataFlow, but I don't know why?
What is a problem? I use SQL Pool datasets in Azure Synapse Pipelines and it works. Is it problem with my licence, version or maybe I do something wrong?
Have you tried selecting Synapse Dataset instead of SQL
You will need a Synapse Linked Service as well
Due to reasons (I've been told it's a networking issue with MIs; regardless, we can't fix it, we're waiting on a solution from MS that may or may not come out this year), we cannot talk from on-prem to managed instances. However, we can reach Azure SQL Databases.
We would like to replicate lookup data from on-prem to Azure Managed Instances (MIs) as well as ASDs. Is there any way to use the ASD as a "jump" box for replication, maybe by putting the Distributor on an MI that can talk to the ASD?
Looked at Azure Data Sync, but the 5-minute-minimum makes it a no-go.
Otherwise, our current fallback is to run an Azure VM/AKS instance, replicate to it, then from there to the ASDs/MIs. But man, I'd rather not have to do that.
Any suggestions appreciated.
One Way Transactional replication using SQL Data Sync for Azure.
If they wish to maintain the replication running after the migration to Managed Instances, transactional replication will be the best option at this time. Replication to Azure SQL Database
Or using ETL via Azure DataFactory
Transfer data from a SQL Server database to an Azure SQL Database using Azure Blob Storage and the Azure Data Factory (ADF): this is a supported legacy technique that benefits from a replicated staging copy.
ADF pipeline consisting of two data migration processes. They work together to transfer data between a SQL Server database and an Azure SQL Database on a regular basis. The two actions are as follows:
Data should be copied from a SQL Server database to an Azure Blob Storage account
Is there a way to directly migrate your database in Azure SQL database to the Azure PostgreSQL database (HyperScale-Citus).
I have looked into the Azure migration services but it does not support this particular migration route.
I have an approach in mind but don't know if it will work?
We can make a backup of the Azure SQL database on the cloud itself
and then load that backup to Azure PostgreSQL database
But I do not where to make a backup. In azure blob storage or something else?
Frist way, you could try the tutorial #ffffff01 provided for you.
There this another way can help you achieve that: Data Factory can help you migrate the database/data from Azure SQL database to Azure PostgreSQL database directly.
Ref bellow tutorial:
Copy data to and from Azure Database for PostgreSQL by using Azure
Data Factory
Copy and transform data in Azure SQL Database by using Azure Data
Factory
Create Azure SQL database as source dataset and Azure PostgreSQL database as sink.
Hope this helps.
We're in the process of a server migration from an on-prem server (Win2008R2) to Azure PaaS.
To move the DBs, we used the Microsoft Data Migration Assistant (DMA) tool, which worked great and we can connect to the migrated Azure DB via SQL Server Management Studio.
Considering:
Made quite a few changes to the migrated Azure DB (tables, stored procedures, indexes) to work with the apps in Azure
Combined multiple on-prem DBs into one DB in Azure via DMA to save costs
On-prem DB is continually being modified by insert/update operations (multiple tables) during the migration process
Question: what is the best and fastest way to migrate data (all vs missing/updated) considering the above?
I would recommend you to migrate first only the schema of your on-premises databases to Azure SQL Databases and then let Azure SQL Data Sync to migrate the data to Azure and keep it updated on Azure SQL Database.
My suggestion to start with an empty schema on the Azure SQL Database side is because when SQL data Sync finds data on-premises and on Azure it start comparing both databases and that consumes a lot of resources.
On the initial sync SQL Data Sync may consume a lot of resources on the on-premises database server even when having an empty schema on the Azure side, for that you can use SQL Server Resource Governor to cap the CPU used by the data sync sessions in your on premises SQL Server, and this way avoid big performance impact possibly affecting database users.
When you are ready, you can switch your users (gradually or not if SQL Data Sync is on bi-directional mode) to Azure. Once your users have been migrated, you can then remove the member database (the on-premises database) from the SQL Data Sync configuration and stop SQL Data Sync operation.
I disagree with all the answers here.
If you are running on Win2008R2 there is a high chance that you are on an old SQL Server (2008? 2012?) which are both deprecated and unsuitable for Azure SQL Database. And probably the application is also old and not suitable for the Cloud in general. I suggest you a good testing phase.
Here my to do list:
Upgrade SQL Server to SQL Server 2016 on-prem and test if all your queries are still running correctly
Test how ready is your SQL Server to go to Azure SQL Database through Microsoft Data Migration Assistant (DMA) tool or the new Azure SQL Migration extension for Azure Data Studio (came out his month).
Don even think for a second that merging databases will reduce your overall costs. Decide if going multi-tenant or single-tanant not because of the price of the database.
Plan for hours of downtime based on the size of the migration. Don't migrate while your database is modified. Expect downtime. The best way is to take a backup of the day before and then resume the logs.
and test like crazy. This is not gonna be easy because the app is old.
Good luck.
Visual Studio also has a great tool for comparing both schema and data between two databases on different servers.
It can then update the target database with any changes after which you can switch over to use the Azure DB.
This method would require downtime of around 5-30 minutes depending on amount of data, but that might be acceptible depending on your requirements.