Hi, On Mon, Feb 25, 2002 at 10:35:49AM +0100, Sven Rudolph wrote: > "Stephen C. Tweedie" <sct@redhat.com> writes: > > > > A fair bunch of people did a fair bunch of testing of this last year. > > > Bottom line: RAM-based journals don't speed ext3 up. > > > > Well, they did, but in general it was no better than adding an > > external disk-based journal. > > So I want to use a small RAID-1 to hold the journal for the 600GB > RAID-5-based FS. Should be OK? Yes. That's a common config on some other OSes. > I haven't found hints on sizing the external journal. How big should > it be, and how do configuration factors (journalling mode e.g.) > influence this? It Depends. What sort of things will you be using it for? The best journal size is more a function of the activity on the filesystem than the filesystem size. --Stephen
