From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ming Zhang Subject: Re: reiser fs slow on mksf and mount Date: Fri, 26 Aug 2005 13:08:57 -0400 Message-ID: <1125076138.5549.65.camel@localhost.localdomain> References: <1125074717.5549.44.camel@localhost.localdomain> <430F4B91.7030909@namesys.com> Reply-To: mingz@ele.uri.edu Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Return-path: list-help: list-unsubscribe: list-post: Errors-To: flx@namesys.com In-Reply-To: <430F4B91.7030909@namesys.com> List-Id: Content-Type: text/plain; charset="us-ascii" To: "Vladimir V. Saveliev" Cc: reiserfs-list@namesys.com i think 3.2TB partition is not that big these days right? i would think some people that hold millions of files will have much larger partition than this. so you think this is a normal speed for such size partition? also iostat 1 -k shows that during mount, there are small size read happen each second. so this is because read meta data and metadata is not continuous on disk? ming On Fri, 2005-08-26 at 21:04 +0400, Vladimir V. Saveliev wrote: > Hello > > Ming Zhang wrote: > > Hi, folks > > > > I am not sure if this is normal or not. > > > > I try to create&use a reiserfs on a 8 disk raid0. Then I found that mkfs > > need ~90 sec and mount need ~70 seconds. > > > > Is there anything wrong on my side? > > > > Your device is too big. > > > Thanks! > > > > > > Ming > > > > > > > > Detailed info followed. > > --------------------------------------------------------------------- > > [root@bakstor2u root]# cat /proc/mdstat > > Personalities : [linear] [raid0] [raid1] [raid5] [multipath] [raid6] > > [raid10] [faulty] > > md0 : active raid0 sda[0] sdh[7] sdg[6] sdf[5] sde[4] sdd[3] sdc[2] sdb > > [1] > > 3125690368 blocks 64k chunks > > > > unused devices: > > > > [root@bakstor2u root]# time mkfs.reiserfs /dev/md0 -ff > > mkfs.reiserfs 3.6.13 (2003 www.namesys.com) > > > > <...> > > > > Guessing about desired format.. Kernel 2.6.11.12 is running. > > Format 3.6 with standard journal > > Count of blocks on the device: 781422592 > > Number of blocks consumed by mkreiserfs formatting process: 32059 > > Blocksize: 4096 > > Hash function used to sort names: "r5" > > Journal Size 8193 blocks (first block 18) > > Journal Max transaction length 1024 > > inode generation number: 0 > > UUID: 98d990f3-d54f-43e3-9fde-8c9c9a6d3481 > > Initializing journal - 0%....20%....40%....60%....80%....100% > > Syncing..ok > > > > Tell your friends to use a kernel based on 2.4.18 or later, and > > especially not a > > kernel based on 2.4.9, when you use reiserFS. Have fun. > > > > ReiserFS is successfully created on /dev/md0. > > > > real 1m28.783s > > user 0m0.151s > > sys 0m0.398s > > > > Hmm, mkfs.reiserfs had to write 32059 blocks. It is about 131mb. 1m28s is too much for that. > Could it be that some of disks used in that raid were not spinning when you started mkreiserfs? > > > [root@bakstor2u root]# time mount /dev/md0 t > > > > real 1m11.448s > > user 0m0.000s > > sys 0m0.225s > > > > There is a patch to cure this problem. > http://www.mail-archive.com/reiserfs-list@namesys.com/msg18442.html > Please note that it is experimental one. > > > > > > > >