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Configuration: Storage Engines

RavenDB supports two storage engines and each database can be created with a different one:

  • (Default) ESE (Extensible Storage Engine aka Esent) - Microsoft storage engine available in Windows. More info here.
  • Voron - custom made managed storage engine created by Hibernating Rhinos.



  • key size must be less than 2048 bytes in Unicode



  • key size must be less than 2024 bytes in UTF8
  • no support for DTC transactions


  • disk must handle UNBUFFERED_IO/WRITE_THROUGH properly
  • .NET 4.5 or higher
  • Hotfix for Windows 7 and Windows Server 2008 R2


You can watch Level 400 - Diving into Voron talk by Oren Eini if you are interested in details about Voron.

Using Studio

In order to change a storage engine in the Studio, while you are creating a database, go to Advanced Settings and change Storage Engine according to your needs.

Figure 1: Creating database and changing Storage Engine