From mboxrd@z Thu Jan 1 00:00:00 1970 From: Hans Reiser Subject: Re: ReiserFS v3 choking when free space falls below 10%? Date: Fri, 30 Jun 2006 09:33:53 -0700 Message-ID: <44A55271.7050501@namesys.com> References: <1151602916.32453.40.camel@ipso.snappymail.ca> <1151608355.6335.79.camel@tribesman.namesys.com> <1151612146.11510.4.camel@ipso.snappymail.ca> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Return-path: list-help: list-unsubscribe: list-post: Errors-To: flx@namesys.com In-Reply-To: <1151612146.11510.4.camel@ipso.snappymail.ca> List-Id: Content-Type: text/plain; charset="us-ascii" To: Mike Benoit , Jeff Mahoney Cc: "Vladimir V. Saveliev" , reiserfs-list@namesys.com Mike Benoit wrote: > >This seems strange, because to me this type of workload would lend >itself to being less fragmented then most workloads. All the box does is >records TV programs, so over the course of 30-60min periods I would >guess 95+% of the writes are sequential. > >Why would the fragmentation be so bad? Is there a way to tell what the >fragmentation rate is? > >Thanks. > > > I wonder how the bitmap optimizations that Jeff added handle this usage pattern. Jeff?