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+This determines the level of compression used when doing a backup. The 
+following options are available:
+
+low
+
+Uses either no compression (for partimage and dd) or the lzo 
+compression algorithm (for fsarchiver). The advantage is that it's 
+very fast on the client side. The disadvantage is that the size of 
+the backup will be large; in most cases as large as the original 
+data. Using this setting really only makes sense if you have vast 
+amounts of storage space for your backups and a very fast network, 
+or if you know that your data is pretty much uncompressible, such as 
+a compressed database. Note that even though low compression is fast 
+on the client side, you may still run into speed limitations of the 
+storage subsystem on the server side, or of the network.
+
+normal
+
+Uses the gzip compression algorithm to give the best compromise 
+between speed and backup size. This is the default compression level.
+
+high
+
+Uses the bzip2 compression algorithm (for partimage and dd) or the 
+lzma compression algorithm (for fsarchiver). This results in a very 
+good compression ratio requiring less space to store the backup. 
+However, this comes at the price of high CPU and memory usage on the 
+client side. A backup done with high compression will probably take 
+a long, long time to accomplish. Additionally, if there is 
+insufficient memory available on the client, the compression may 
+fail altogether, resulting in the backup being stored uncompressed. 
+If you want to use high compression, testing is advised before 
+deciding to use it for real.