From mboxrd@z Thu Jan 1 00:00:00 1970 From: Hans Reiser Subject: Re: Silly question, defrag Date: Wed, 03 Apr 2002 22:28:25 +0400 Message-ID: <3CAB49C9.9000504@namesys.com> References: <200204030017.12595@X-Message-Flag:> <3CAABBA6.3030101@swelltech.com> <3CAABC73.3030004@namesys.com> <200204030808.26186@X-Message-Flag:> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit list-help: list-unsubscribe: list-post: List-Id: Content-Type: text/plain; charset="us-ascii"; format="flowed" To: matthew@psychohorse.com Cc: reiserfs-list Matthew Johnson wrote: >>Defragging is a missing feature. It will be the most important feature >>of V4.1 >> > >4.1 seems pretty exciting, but why the need to defrag on these filesystems vs >others. Or do we not yet have the data? Guess I am intrigued on how these >work. Will defrag be included for peace of mind, or for real gain? How much >fragmentation can one expect? Will you need to unmount drives to defrag? > >Sorry for all the questions... > >Matt > > > The reiser4.1 repacker will not just defrag, it will repack, and maybe even someday compress unaccessed data. There are a whole host of optimizations that are too expensive to do with every write, but very reasonable to do once a day. Repack will be great! As for why is it not in V3, the reason is simple. Code freeze hit, and it was not yet started.... Hans