From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marcin Subject: Re: [bcachefs] problem with `bcache fsck` Date: Thu, 16 Mar 2017 23:07:20 +0100 Message-ID: References: <6aaaad468dd77840265bcd9f31f1878a@mejor.pl> <20170316203455.jgl6ovsrve55fnxi@moria.home.lan> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Return-path: Received: from jowisz.mejor.pl ([81.4.120.72]:12870 "EHLO jowisz.mejor.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752017AbdCPWIU (ORCPT ); Thu, 16 Mar 2017 18:08:20 -0400 In-Reply-To: <20170316203455.jgl6ovsrve55fnxi@moria.home.lan> Sender: linux-bcache-owner@vger.kernel.org List-Id: linux-bcache@vger.kernel.org To: Kent Overstreet Cc: linux-bcache@vger.kernel.org W dniu 2017-03-16 21:34, Kent Overstreet napisał(a): > On Thu, Mar 16, 2017 at 04:16:29PM +0100, Marcin wrote: >> Hi! >> It's good to hear that silence on mailinglist doesn't mean that there >> is no >> changes in developing bcachefs! > > Join the irc channel! It's pretty active. Done. >> Is bcache fsck able to do fsck on tiered devices? > > Yes - just pass it all the devices, e.g. > bcache fsck /dev/sdb /dev/sdc > > Also, keep in mind fsck is still run by default at mount time, there's > normally > no need to use userspace fsck (and running fsck in userspace and then > mounting > will be slower than just mounting and running fsck then, due to mount > still > having to scan all the metadata which will be cache cold). If I add bcachefs to fstab openrc expects userland fsck to works this is why I tried it to use. >> I know that there is some stability problem with tiered devices >> because when >> I mounted tiered fs and started to copy files on it the host rebooted >> after >> some time. I have to run netconsole to catch what kernel says, then I >> post >> it on ML. > > You might have been hitting a bug in a recent patch to improve > readpages > performance - I backed it out last night after I discovered it. There is no new commit, I'm at commit 7274700edcf99ab67d4f72eca4f07d0220b9abae Author: Kent Overstreet Date: Tue Mar 14 21:07:39 2017 -0800 bcache: fix device hot add I suspect that problem is due to using --metadata_replicas=2. If you have a some spare time please try fileystsem formated with this parameters: # bcache format --compression_type=gzip --metadata_replicas=2 --data_checksum_type=crc64 --metadata_checksum_type=crc64 --tier=2 /dev/sde1 --tier=3 /dev/sdd1 >> And I'm still missing compression saves free space on disk:) > > Yeah, that's something I've been wanting to get to, but people have > been > badgering me for replication more :) You have implemented too many features, everyone find something usefull for self and want to have it. You should implement only writing and reading to/from files;) Btw: # curl https://evilpiepirate.org/git/bcache-tools.git/ curl: (51) SSL: no alternative certificate subject name matches target host name 'evilpiepirate.org' Marcin