From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mike Fedyk Subject: Re: [Fwd: Re: [OT] block allocation algorithm [Was] Re: heavily fragmented file system.. How to defrag it on-line??] Date: Thu, 25 Mar 2004 16:06:33 -0800 Message-ID: <40637409.5040007@matchmail.com> References: <40636893.3050605@matchmail.com> <1080258953.2828.3.camel@watt.suse.com> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Return-path: list-help: list-unsubscribe: list-post: Errors-To: flx@namesys.com In-Reply-To: <1080258953.2828.3.camel@watt.suse.com> List-Id: Content-Type: text/plain; charset="us-ascii"; format="flowed" To: Chris Mason Cc: reiserfs-list@namesys.com Chris Mason wrote: > On Thu, 2004-03-25 at 18:17, Mike Fedyk wrote: > >>Hi guys, >> >>Reiser3 has worse fragmentation than ext3 in this test case. Reiser4 >>was better, but it had a bad worst case and still wasn't as good as xfs. >> >>I'm especially interested in getting reiser3 to produce fewer fragments >>in this test. >> >>Comments? > > > There's a great deal of room for improvement in the reiser3 block > allocator. I've got patches against 2.4.x that make it much smarter by > trying to spread large files apart from each other but keep small files > (and small directories) close together. > > Those are on hold until the logging and acls are done and in, but if > people want to play around with porting them I can send you a copy. If I knew more than Shell and Perl, I'd take you up on that offer. Maybe in ~6 months. Lurking on the kernel lists really teaches you a lot. :-D Mike