Re: [PATCH] 2.6.0 - Watchdog patches (BK consistency checks)
From: Eric D. Mudama (edmudama_at_mail.bounceswoosh.org)
Date: 12/31/03
- Previous message: Ged Haywood: "Re: All filesystems hang under long periods of heavy load (read and write) on a filesystem"
- In reply to: Ed Tomlinson: "Re: [PATCH] 2.6.0 - Watchdog patches (BK consistency checks)"
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Date: Wed, 31 Dec 2003 10:42:06 -0700 To: linux-kernel@vger.kernel.org
On Wed, Dec 31 at 10:01, Ed Tomlinson wrote:
>I am not saying I do not want do have consistency checks done. I do want
>to control _when_ and how often they run
I don't see how it would be valid to not do a consistency check after
every network operation, which is what it does now...
Every time you are modifying your archive from a remote source, the
consistency check makes sure you don't have corruption in the transfer
that was previously undetected, or corruption in the underlying
archive which is about to accept the changes. Since you can only do
network updates at a time when your own archive is in a "checked-in"
state, if the network update fails or detects corruption, you can
clone what you'd already checked in to a new location and recover
trivially. The most work you can lose is the delta between your last
changeset and the current one, assuming you keep some sort of backups
around.
What exactly would you do if you'd been working "offline" for 3 weeks,
went to sync, and it said that your archive was corrupted? Or should
it try to merge into a corrupt archive anyway? Should that archive
that was corrupt, and then had possibly good changes layered on top of
it, be valid for attempting a clone?
I think that limiting the consistency checking could be like opening a
*very big* can of worms.
-- Eric D. Mudama edmudama@mail.bounceswoosh.org - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
- Previous message: Ged Haywood: "Re: All filesystems hang under long periods of heavy load (read and write) on a filesystem"
- In reply to: Ed Tomlinson: "Re: [PATCH] 2.6.0 - Watchdog patches (BK consistency checks)"
- Next in thread: Andy Isaacson: "Re: [PATCH] 2.6.0 - Watchdog patches (BK consistency checks)"
- Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]
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