Let's tune your filesystem.
This command is used to tune the f/s. It can change two parameters (journal size and maximum transaction size), and it can move the journal's location to a new specified block device.
For more information, come straight to the source, namesys. Many had thought Reiser was going to be the filesystem of the future, until its benefactor Hans Reiser, was accused of murder of his estranged wife. Shortly thereafter, many distributions dropped ReiserFS from what was their standard default f/s.
This was first published in September 2007