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Disk Journaling
Authored by: sgi_oh_too on Apr 07, '03 11:47:30PM

A while back, I wrote a research paper on journaling filesystems. Really, there can be a noticable amount of lag introduced depending on the implementation. SGI's XFS, Be's BeFS, IBM's JFS and softupdates in the BSD BFFS (not really the same as journaling) are by far the best implementations, and thus all result in 'almost' transparent operation in regard to speed. Hacked journaling add-ins like that of HFS et al ... are not usually good performers. If the rumor mill is correct, HFS may not be around much longer anyways. But, journaling is not just for servers, if you have a laptop, it can be invaluable in the situation of an empty battery. So, those of you that are with it, hop on the Darwin project and code us a new filesystem with metadata support and a good implementation of journaling! :)



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