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IP Office ContactStore 7.8 Page 56
15-601038 Issue 4b (06 July 2009)IP Office
7.6 Backing Up The Voice Recordings
ContactStore stores voice recordings in the path you specify on the System Setting | Server page. This path quickly
fills up with thousands of directories and millions of files. When the partition is nearly full, the server maintains only a tiny
amount of free space on the partition by deleting batches of 100 recordings (and the directory that catalogued them) at a
time, as it requires space for new recordings. This causes a huge churn of files every day on a large system.
Limitations of Full and Incremental Backup Procedures
On a ContactStore server, two issues make it difficult to back up voice files:
· the file size
· the rate of change of the voice recording files
Together these issues make most traditional backup strategies for the voice recordings ineffective. Traditional full
backups are required more frequently than normal, which wastes backup media, and incremental backups are larger than
expected because of the large churn of creations and deletions. For a backup strategy to be successful, it must be easy
to restore the data if necessary.
Traditional “full plus incremental” backup solutions are ineffective because these backup solutions cannot complete fully.
In the event of a complete disk failure, the process restores the full backup, then the increments in chronological order.
This procedure immediately overflows the disk when the restore program tries to create the increments because the
partition holding the call is almost at capacity to begin with. The full plus incremental backup will fail because it runs out
of disk space before it has processed the “removals” part of the procedure. Traditional restore procedures are also
ineffective. If you use this solution to review a recording that has been deleted because of age, the ContactStore service
immediately deletes any restored file as part of its disk maintenance. Finally, traditional backup solutions often require
locks on the disk while they work. This can seriously disrupt the working of the recorder.
This simplest and cheapest strategy for backing up the recordings is to use the built in DVD+RW archive mechanism. This
is not only fully integrated with the workings of the recorder and its search and replay mechanism, but also is well suited
to the incremental recording required for a recorder. As recordings are added to the calls path they are copied to DVD in
an efficient manner. Even when they have been deleted from the hard disk, the recorder is still able to play them
because it knows which DVD they are on and can replay directly from DVD, without an intervening ‘restoration’ step.
Each DVD holds about 4GB, which means it can hold about 150 channel-days worth of recordings from a busy system.
For less than dollar a day, even a busy system can have limitless backup.
7.7 Moving to a New PC
If it becomes necessary to move the ContactStore server to a new PC, use the following process.
1.Take backup of call details database .
2.Install ContactStore on the new server PC.
3.Restore the call details database to new machine.
4.Copy the calls folder used by the previous server to the location (Server | Call Storage Path) set for the new
server.
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