Date: Thu, 23 Mar 2006 22:16:47 +0100 (CET) From: "Julien Gabel" <julien.gabel@thilelli.net> To: "Eugene" <genie@geniechka.ru> Cc: freebsd-fs@freebsd.org, Kris Kennaway <kris@obsecurity.org> Subject: Re: UFS2 Snapshots in 6.1-Beta4 - Confirmed Problems. Message-ID: <50319.192.168.1.101.1143148607.squirrel@webmail.thilelli.net> In-Reply-To: <007801c64eb9$3db4c050$1b12c055@genie> References: <20060322120033.E5B8916A44B@hub.freebsd.org> <007801c64eb9$3db4c050$1b12c055@genie>
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> While we're on the topic of snapshots, I recently posted this follow-up to > the PR kern/66270 "[hang] dump causes machine freeze" >> I wonder what is the status of this PR? >> I seem to have the same problem with 5.3-RELEASE. >> >> Before this started, system worked nicely for more than a year and then >> it >> started to hang during dump (seemingly just after mksnap_ffs) first >> intermittently and now reproducibly (might increase in data size be a >> factor? though disk is only about 18% full). >> Originally it hanged and console had complains about increasing >> PMAP_SHPGPERPROC and maxproc. >> After some talk in freebsd-fs, I adjusted these parameters and now it >> just hangs without complaining =(( >> >> Any suggestions? > In addition to this PR, I found a couple of similar threads in different > lists but they all just have some initial talk and preliminary analysis, > and then it just stops. Was that snapshot problem fixed or is it the same > as we are talking now? I can't believe I am the only one in almost 2 > years who is (trying to be) doing automated backups... > So, if it was fixed, when (which version)? If not, then when it might be > and -- in the meantime -- is there any workaround for backups? (The system > is the production server on the colocation so doing backups in single-user > mode is not practical). Interesting. I used dump/restore without problem on i386 using a file system of 120Go. I swiched two weeks ago on amd64 using a file system of 260Go and encountered the very same behaviour (hang, freeze). Don't know if it is related to the new processor architecture or the bigger fs size, but i didn't observe this hang on smallest file system before. Because i am a big fan of dump, i currently choose to use it without the '-L' switch, back to the old (classical?) behaviour, i.e. not doing a snapshot before doing the dump. It is always better than not having complete system backup at all (YMMV, though). I am currently running 6.1-PRERELEASE build Wed Mar 22 03:55:42 CET 2006. -- -jpeg.
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