Product Documentation

FairCom Database Backup Guide

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The FairCom Server dynamic dump script file keyword, !IMMEDIATE_RESTORE instructs the dynamic dump to be immediately followed by a dump restore. This allows transaction-consistent files to be available immediately in a native file system form as opposed to embedded files in the dynamic dump stream file.

A key issue is where the dynamic dump restore utility, ctrdmp, can run as it cannot run in the current server directory. If this occurs, error TCOL_ERR (537) results indicating that ctrdmp conflicted with an existing server operation.

The natural solution is to run ctrdmp in the directory that receives the dump stream file, which is called the dump stream base directory. In essence, this requires that !DUMP <streamFileSpec> use a file name including a path where the dump restore should run. For example, a dynamic dump script entry of the form

!DUMP I:\dump\mydumpstream

will cause the dump stream file mydumpstream to be created in the dump stream base directory I:\dump. If !IMMEDIATE_RESTORE is part of the dump script, then the automatically launched ctrdmp is also executed in the I:\dump directory.

It is recommended to launch ctrdmp.exe from a batch file called ctrdmp, which can reside in the server directory. The executable can reside elsewhere (i.e., in the dump stream base directory) and the batch file can call it using a path. The batch file can also do cleanup before (and after) a restore takes place, such as archiving from a prior restore.

Upon restoration of files, the enhanced dump restore will also automatically create any required directory hierarchies for previously backed up files. If an immediate restore operation fails, the server sets the error code for the dynamic dump operation to DRST_ERR (797, immediate dump restore failed).