Comparison of two storage methods in SVN (BDB vs. FSFS)

The Subversion repository (repository), which is located on the server side, is where data is managed and stored uniformly. In this article, we take Linux as an example to introduce the basic methods of configuring and managing the Subversion repository on the server side.

To create a repository, first determine which data storage method to use. In Subversion, repository data is stored in two ways, one for storing data in a Berkeley DB database, and the other for storing it in a custom format using plain files, called FSFS.

Two storage methods have advantages and disadvantages, readers can refer to http://svnbook.org/above the document to understand the detailed comparison and differences, here, we only refer to the above documents in the simple table, give a concise comparison.

features	Berkeley DB	FSFS
Sensitivity to operational interruptions	System crashes or permissions issues can cause the database to "jam" and require regular recovery.	Not sensitive
Can read-only load	No	Can
Storage Platform agnostic	No	Can
Accessible from the network file system	No	Can
Version Library size	Slightly larger	Slightly smaller
Extensibility: Number of revision trees	Unlimited	Some local file systems have problems processing a single directory that contains thousands of entries.
Extensibility: Directories with large files	More slowly	More slowly
The speed of checking out the latest code	More quickly	OK
The speed of a lot of commits	Slower, but the time is allocated throughout the commit operation	Faster, but the last longer delay may cause client operations to time out
Group access rights processing	is sensitive to the user's umask settings and is best accessed by only one user.	Insensitive to Umask settings
Function Maturity Time	2001	2004

Determines the specific type of data storage, as long as the command to execute the command in order svnadmin to create a Subversion repository, the command is as follows:

/etc/svn//etc/svn/--fs-type fsfs/etc/svn/repos

via:http://www.ibm.com/developerworks/cn/java/j-lo-apache-subversion/

Comparison of two storage methods in SVN (BDB vs. FSFS)