Messages in this thread |  | | Date | Fri, 05 Jan 2001 01:31:12 +0100 | From | Daniel Phillips <> | Subject | Re: Journaling: Surviving or allowing unclean shutdown? |
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"Stephen C. Tweedie" wrote: > > On Wed, Jan 03, 2001 at 05:27:25PM +0100, Daniel Phillips wrote: > > > > Tux2 is explicitly designed to legitimize pulling the plug as a valid > > way of shutting down. Metadata-only journalling filesystems are not > > designed to be used this way, and even with full-data journalling you > > should bear in mind that your on-disk filesystem image remains in an > > invalid state until the journal recovery program has run successfully. > > ext3 does the recovery automatically during mount(8), so user space > will never see an unrecovered filesystem. (There are filesystem flags > set by the journal code to make sure that an unrecovered filesystem > never gets mounted by a kernel which doesn't know how to do the > appropriate recovery.)
Hi Stephen.
Yes, and so long as your journal is not on another partition/disk things will eventually be set right. The combination of a partially updated filesystem and its journal is in some sense a complete, consistent filesystem.
I'm curious - how does ext3 handle the possibility of a crash during journal recovery?
-- Daniel - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/
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