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+mbuffer (a tool for buffering data streams)
+
+mbuffer has a large set of unique features:
+ - direct support for TCP based network targets (IPv4 and IPv6)
+ - ability to send to multiple targets in parallel
+ - support for multiple volumes
+ - I/O rate limitation
+ - high/low watermark based restart criteria
+ - configurable buffer size
+ - on the fly MD5 hash calculation
+
+It is especially useful, if you are writing backups to fast tape drives
+or libraries. Those drives tend to stop and rewind if they have a buffer
+underrun. This so called tape screwing reduces the lifetime of the
+motors.
+
+mbuffer can prevent buffer underruns, if used correctly and speed up
+the whole backup process. Please read the man page for details, how to
+use it.