Sql server 2016 split url backup into multiple files

Question

I have a database backing up into an Azure page blob via URL backups set up from SSMS. I am trying to find out how to split the backup into smaller chunks. I have a 2 TB database that is now backing up in to one large file, I want to separate it into 4 smaller files. Any hints would be helpful.

Environment Summary: Azure VM with SQL 2016 Enterprise Backup Method: URL Backup to Azure Page Blob Security Involved: Key Vault and Credentials Current Status: Backups working Desired Status: Large Backups split into multiple files

I am ok with a powershell example. Thank you

Answer 1

you should split it into multiple url in this way:

BACKUP DATABASE mydb
TO URL = 'https://mystorage.blob.core.windows.net/mycontainer/mydbBackupSetNumber2_0.bak',
URL = 'https://mystorage.blob.core.windows.net/mycontainer/mydbBackupSetNumber2_1.bak',
URL = 'https://mystorage.blob.core.windows.net/mycontainer/mydbBackupSetNumber2_2.bak'
WITH COMPRESSION, MAXTRANSFERSIZE = 4194304, BLOCKSIZE = 65536; 

ref: https://learn.microsoft.com/en-us/archive/blogs/sqlcat/backing-up-a-vldb-to-azure-blob-storage