Date: Wed, 20 Jun 2007 21:35:03 +0200 From: Espen Skoglund <esk@ira.uka.de> To: Kostik Belousov <kostikbel@gmail.com> Cc: freebsd-fs@freebsd.org, Espen Skoglund <esk@ira.uka.de> Subject: Re: Snapshot usage guidelines (to avoid stability issues) Message-ID: <18041.33127.677804.653910@gargle.gargle.HOWL> In-Reply-To: <20070620165746.GX2268@deviant.kiev.zoral.com.ua> References: <18041.21810.297355.202403@gargle.gargle.HOWL> <20070620165746.GX2268@deviant.kiev.zoral.com.ua>
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[Kostik Belousov] >> Looking at PRs and mailing lists there seems to be mainly two >> outstanding stability issues with snapshots: a) snapshotted fs >> running full, and b) deleting large amount of files on an fs with >> multiple snapshots. The former issue, while certainly annoying, >> one could be able to work around. The latter issue, on the other >> hand, seems more like a definite show stopper. >> >> Am I right in inferring that the two above cases are main issues >> with snaphots at this time, or are there other known gotchas that I >> have to look out for. > About the issue b). Are you system sources before or after > 2007-06-11 10:53:48 UTC ? Or simply show me the version of > sys/ufs/ffs/ffs_snapshot.c. > If it is less then 1.103.2.24, see developers handbook for > instruction on reporting deadlocks. Ok. Thanks. Looking at the CVS logs after the hangup I wasn't sure whether the last commits addressed any of my problems. My kernel was from June 9, so I just missed the update you refer to. Unfortunately I didn't have any debug options turned on in my kernel. Also, I wasn't able to log into the system in any way so there was not much information I could gather. Will try the update once I find a suitable time that doesn't mess up my/our work schedule. If the update does indeed solve problem (b) then I can actually make use of snapshots. Huzzah! eSk
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