BACKTEST Syntax and Parameters

Platform SDK: Exchange Server

BACKTEST Syntax and Parameters

BACKTEST 
  -T<MDB|DSA> 
  [-S <Server to back up>] -
  [B <File to hold backup>] 
  [-R <size of buffer > 8000 bytes>| r | R] 
  [-I ]
  [/HELP or /?]

BACKTEST Parameters

Flag	Settings
-T	Specifies backup type. This parameter should be set to MDB for information store backups and to DSA for directory backups. For example: -T MDB
-S	Specifies name of the server to be backed up. For example: -S edkdocs20
-B	Specifies name of the backup file.
-R	Specifies the size of the buffer. Users can select a size (always greater than 8000 bytes) or they can select r or R, which randomly selects a size between 0 and cbReadHintSize (defaults to 65536). For example: BACKTEST -T:MDB -B:Output.bak -R:50000 – Or – BACKTEST -T:MDB -B:Output.bak -R:r
-I	Specifies an incremental backup. Circular file logging must be disabled during incremental backups because they are not compatible.
/HELP or /?	Displays Help information.

For both BACKTEST and RESTTEST, flags may be preceded with a slash(/) or a dash(-). There must be a space or a colon after each flag and before its parameters.

Backups can be either incremental or full. Restores can be full or incremental as well, but incremental restores cannot be done on a database until after a full restore has been done. A number of incremental restores may be applied consecutively without a full restore, but they must be done in order. Also, the computer must not be restarted until all the incremental restores have been applied.

Note Selecting a buffer size less than 8000 bytes causes unpredictable results.

To run RESTTEST

Type the following on the command line:

RESTTEST -B <backup file> [-S <server to restore>]

RESTTEST Parameters

Flag	Settings
-B	Specifies backup file. This file should be created with the BACKTEST command. For example: -B backt3
-S	Specifies name of the server to be restored. If this flag is not entered, the GetComputerName function is called to provide the name of the server. For example: -S edkdocs20