In others words, when a snapshot is performed by SnapManager all related LUNs are considered together and all concerned database files in single volume are frozen when snapshot is created. FlexVol is a kind of virtual storage pool to manage physical storage efficiently and can include one or more LUNs). So why do we have to take care about database file placements with Netapp Storage? Well, according to our first explanation above, if we perform snapshot backups the unit of work is in fact the volume (FlexVol is probably the better term here. with snapshot –> VSS (3) – database files IO freeze –> SnapDrive (3) – snapshot creation SnapManager (1) –> VDI (2) – – backup database. Here a simplified scheme of what’s happen during the SnapManager backup process: We may find in such situation that a database is not consistent. It is important to precise that without SnapManager, performing snapshots from a pure storage perspective is still possible but unfortunately in this case the storage layer is not aware of the database files placement.
NET APP SNAP MANAGER WINDOWS
To achieve this task, SnapManager will coordinate several components like SnapDrive for Windows to control the storage LUNS and SQL Server to freeze IO by using the VSS Framework. Streaming backups concern only the system database files and the transaction log files. In fact SnapManager performs SQL Server backups by using either a snapshot of database files or by issuing streaming backups.
After reading the Netapp storage documents I was ready to begin my database files.įirst of all, we should know how SnapManager works. This detail is very important because in this case we have to meet some requirements about storage layout. The particularity here is that my customer wants to manage his backups with NetApp SnapManager for SQL Server. At this point you will probably meet the well-known best practices and guidelines provided by Microsoft but are you really aware of the storage vendor guidelines? Let’s talk about it in this blog post.Ī couple of weeks ago, I had the opportunity to implement a new SQL Server architecture over on a Netapp storage model FAS 3140.
NET APP SNAP MANAGER HOW TO
When you install SQL Server, you have to consider how to place the database files.
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