I have migrated my database schema to SQL Azure, but I have huge(millions) data records to be migrated please suggest me an approach to move data
Approaches I have tried.
SQLAzureMW tool (but it takes 14 hours time, its not feasible for me)
Import export on SQL server(even this is taking time)
Any other approaches ..need help..!!
For large datasets you usually have to take a more imaginative approach to migration!
One possible approach is to take a full data backup. Ensuring that transaction logs are committed and cleared at the same time.
upload, or use Azure Import / Export to get the backup into Azure blob storage
syncronise your transaction logs with Azure blob storage
Create an Azure SQL database, import backup
replay transaction logs
Keep in sync with transaction logs until you are ready to switch over.
If 14 hours using SQLAzure Migration Wizard and your database is Azure compatible, you have 4 other choices:
export locally to BACPAC, upload BACPAC to Azure, and import BACPAC to Azure
export BACPAC directly to Azure and then import BACPAC to Azure
Use SSMS migration wizard with the most recent version of SSMS (includes a number of functional and performance enhancements)
Use SQL Server transaction replication - see additional requirements for this option. This last option enables you to incrementally migrate to SQL DB and then when SQL DB is current with your on-premise database, just cut your application(s) over to SQL DB with minimal downtime
For more information, see https://azure.microsoft.com/en-us/documentation/articles/sql-database-cloud-migrate/#options-to-migrate-a-compatible-database-to-azure-sql-database
Related
I have a requirement to basically beable to 'tag' PIT restores as to hold for longer (and then later use the restore on demand), the only way i can think to do this is basically figure out a way to export the requested Point-in-Time restore to a bacpac and save it in Azure storage.
PIT restores as to hold for longer.
The Azure SQL Database service protects all databases with an automated backup system. These backups are retained for 7 days for Basic, 35 days for Standard and 35 days for Premium.
I can think to do this is basically figure out a way to export the requested Point-in-Time restore to a bacpac and save it in Azure storage.
These are two different approach. Either you restore a database from PIT or from bacpac file which is either stored in Azure Storage account or local machine.
You can't perform a Point-of-Time restore from bacpac file.
Refer Azure SQL Database Point in Time Restore and Export to a BACPAC file - Azure SQL Database to know more.
I want to move a large 1TB Azure database (PAAS) to a new Azure account. I am trying to use Export but that is going to result in a lot of downtime for the database.
Will upping the price tier currently P1 (DTU) improve export performance?
Yes, upgrading the service tier may improve the import/export performance.
Refer the official document to get better understanding.
Alternatively, You can easily Import and Export the database from one SQL Server to another in the same or different Azure Account using SQL Server Management Studio(SSMS).
Connect to source Azure accounts in SSMS.
Right click on the source database and do Tasks -> Export data tier application
Save as a .bacpac file to your local disk
Now connect to destination Azure accounts in SSMS.
Right click on Databases and select Import Data-tier Application
Select Import from local disk and browse for the .bacpac file saved in step 3
Configure the database settings (give database name and other required settings)
Import the database
I have a number of sql databases in azure sql which I believe are no longer in use.
I'm planning on deleting them however, as a precaution, I would like to take some kind of backup or archive copies that I can quickly use to restore each database if necessary.
I've googled around but haven't found anything concrete. I found one mention of making a copy in a storage account so that it can be recovered but haven't been able to find how to do it - the copy command makes a copy of the database to another database. The "restore" option disappears after you remove a database.
The Database's in question are all less than 10mb in size.
Please consider using an export of the database as a bacpac to a cheap Blob Storage account.
On the Storage field on below image you can provide an existent Storage Account or create a new one.
If you need to recover one of those databases you just need to import them and specify the location of the bacpac you want to import.
You can export your Azure SQL database to the BACPAC backup files, store these backup file to Azure Blob Storage or your on-premise computer.
You can restore the your Azure SQL database from the bacpac files when you need.
Alberto Morllo provides the way about export the database to Blob Storage On Portal.
Beside this, there are many ways can help you do that, please reference:
Export to a BACPAC file using the SQLPackage utility;
Export to a BACPAC file using SQL Server Management Studio (SSMS)
Export to a BACPAC file using PowerShell
Get more details, please reference:
Quickstart: Import a BACPAC file to a database in Azure SQL Database
Export an Azure SQL database to a BACPAC file:
You can choose the way you like best.
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.
I have a backup file of an mssql database using which I would like to create a database in Azure SQL.I see option for restoring a database in azure. But I dont find an option to create a database in Azure SQL from an external backup file.kindly advise.
The data import steps might not be same as how we restore an on premise sql database.
The Data can easily be restored from a azure backup in azure portal ( just import it into a new sql db).
For migrating an on-premise sql database to azure sql database Microsoft provides a tool DMA (Data Migration Assistant). This tool provides a wizard based step by step approach to connect to your on-premise sql database source , select the objects to migrate , generate a script , follow the migration progress and errors if any during the process.
A few changes might be required post migration in the Azure sql database to update the pricing tier , performance and compatibility level.
Here is a document demonstrating a step by step process to migrate an on-premise sql database to azure sql database - https://learn.microsoft.com/en-us/azure/sql-database/sql-database-migrate-your-sql-server-database