We are delighted to announce that Resumable Online Index Create (ROIC) is now available for public preview in Azure SQL DB. The feature allows the ability to pause an index create operation and resume it later from where the index create operation was paused or failed, rather than having to restart the operation from the beginning.
Additionally, this feature creates indexes using only a small amount of log space. You can use the new feature in a number of scenarios.
Read about it in the Azure blog.