From mboxrd@z Thu Jan 1 00:00:00 1970 From: Hans Reiser Subject: Re: Results of "bk clone" tests with 2.6.2, reiser4, reiserfs, ext3, xfs and jfs Date: Wed, 11 Feb 2004 15:09:38 -0800 Message-ID: <402AB632.9080006@namesys.com> References: <1076456354.1585.36.camel@spc.esa.lanl.gov> <402A5468.3000609@namesys.com> <200402110232.54727.elenstev@mesatop.com> <1076525319.1683.44.camel@spc.esa.lanl.gov> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Return-path: list-help: list-unsubscribe: list-post: Errors-To: flx@namesys.com In-Reply-To: <1076525319.1683.44.camel@spc.esa.lanl.gov> List-Id: Content-Type: text/plain; charset="us-ascii"; format="flowed" To: Steven Cole Cc: reiserfs-list@namesys.com, nikita@namesys.com Steven Cole wrote: >On Wed, 2004-02-11 at 02:32, Steven Cole wrote: > > >>On Wednesday 11 February 2004 09:12 am, Hans Reiser wrote: >> >> >>>Steven Cole wrote: >>> >>> >>>>I used the "-o key=key_short" option when creating the >>>>reiser4 file system due to getting this message: >>>>"kernel: WARNING: Key format mismatch. Only small keys are supported." >>>> >>>> >>>This might have hurt our performance substantially. Did you >>>intentionally choose small keys? If not, Nikita, why did this happen? >>> >>> >>Well, intentionally _only_ because it seemed the reasonable thing to do >>in the face of the above warning message. Tomorrow, I can recompile >>the reiser4-enabled kernel with the large keys option and mkfs.reiser4 >>again without that key_short option. I'll let you know if there are any interesting >>results. >> >>Steven >> >> > >OK, tomorrow came a day early this week. > >I recompiled the 2.6.2 reiser4 kernel with CONFIG_REISER4_LARGE_KEY=y, >rebooted, and created a reiser4 fs without the key_small option as before. > >I repeated the tests using the same bk tree and got very similar results >to using short keys. > > Hmmm, we need to look into that. Thanks Steven. Zam, please analyze just what fs operations this benchmark performs, report it, and then analyze why we are slow. >After that, I umounted and did a fsck.reiser4 and got many errors, >"12463 fixable corrections". > Well it seems you found a reason for us to delay our release. Nikita will go fix it and then get back to you.