From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dirk Schenkewitz Subject: Re: Corrupted/unreadable journal: reiser vs. ext3 Date: Thu, 20 Feb 2003 10:55:58 +0100 Message-ID: <3E54A62E.39F38136@interface-ag.com> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Return-path: list-help: list-unsubscribe: list-post: Errors-To: flx@namesys.com List-Id: Content-Type: text/plain; charset="us-ascii" To: Juan Quintela Cc: Reiserfs List Hi Juan, Juan Quintela wrote (in response to me): > > dirk> Not at my system - I have (for example) a 16 Gig partition with > dirk> ext3 on it which is 100% full and has now 6100 kilobytes free space. > dirk> No Problem (with getting ENOSPC, I mean :-)). > dirk> Oh - wait a sec: do you usually reserve 5%-10% for the superuser? > dirk> That might explain why you get ENOSPC at 95%-90%, because that > dirk> reserved space is not taken into account... I normally tune the > dirk> fs to reserve 0% for the superuser. I never needed the reserved > dirk> space anyway. > > that 5-10% is there not for the superuser (with today disks, that is > a lot of space). I was also going to reduce the percentage, but then > somebody explained me that this porcentange needs to be free at all > times to maintain the fragmentation low. And that makes a lot of > sense, the bigger the disk, the more free space you need to have low > fragmentation. Thanks - I didn't know that... although it's logical. Hmm... high frag- mentation should result in a slower access to (or better: higher response time from) the fs, right? I haven't noticed some (I mean, it can be there, but it cannot be very much). Then again, I did not do timing measurements, and filesystems which get that full are not "working" filesystems, but "storage" filesystems, so there is not much movement on them. Hmm... perhaps I should do a defragmentation on one of these filesystems and compare before/after. Have fun dirk -- Dirk Schenkewitz InterFace AG fon: +49 (0)89 / 610 49 - 126 Leipziger Str. 16 fax: +49 (0)89 / 610 49 - 83 D-82008 Unterhaching http://www.interface-ag.de mailto:dirk.schenkewitz@interface-ag.de