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- Path: sparky!uunet!wupost!spool.mu.edu!umn.edu!gaia.ucs.orst.edu!skyking!stanley
- From: stanley@skyking.OCE.ORST.EDU (John Stanley)
- Newsgroups: comp.mail.misc
- Subject: Re: Return-Receipt-To & forwarding...
- Date: 2 Jan 1993 21:06:43 GMT
- Organization: Oregon State University, College of Oceanography
- Lines: 40
- Message-ID: <1i5053INN5hp@gaia.ucs.orst.edu>
- NNTP-Posting-Host: skyking.oce.orst.edu
-
- In article <davecb.726001056@yorku.ca> davecb@nexus.yorku.ca (David Collier-Brown) writes:
- > I tend to assume a normal operations secedule of backups when I
- >discuss mailhubs.
-
- So what? Another red herring. Talk about mail, not backup schedules.
-
- > However, I'm discussing mail, not acts of god.
-
- Turning a system off is not an act of God. The same result would have
- occurred had my mailhost been turned off as was the original recipient
- system.
-
- > My operator restores the backup that cron took, and the mailer
- >delivers the bounce message. Several days late.
-
- Pay attention, Dave. Why should an operator restore a backup for a
- system when the disk itself isn't damaged? Restoring from tape would
- lose information -- everything that came in since the backup was done.
- Or did you ignore the fact that it was a disk CONTROLLER and not a disk
- that died?
-
- Just what information do you think would make it onto a backup tape
- between the time the system died and it being fixed? Mail that hadn't
- yet been received certainly wouldn't make it to the backup tape. Or did
- you ignore the fact that both of the recipient systems were already down
- when the mail and bounce were sent?
-
- But, since you seem to be fixated on backups, here is a trivial example
- of mail being lost, involving backups:
-
- Your cron program does a backup.
- Mail for one of your subsidiary systems comes in.
- That system is being backed up, sorry, can't deliver right now.
- Your system puts the mail into the store-and-forward queue.
- A "Dash-10" falls on your system.
-
- Did the mail get to the recipient? No.
- Did an error message get sent back? No.
- Is that "reliable"? Hardly.
-
-