Xref: utzoo news.sysadmin:1010 comp.mail.uucp:2012 Path: utzoo!utgpu!attcan!uunet!seismo!sundc!pitstop!sun!amdcad!ames!mailrus!uflorida!gatech!mcdchg!chinet!les From: les@chinet.UUCP (Leslie Mikesell) Newsgroups: news.sysadmin,comp.mail.uucp Subject: Re: att(-mt) mail/news losses Message-ID: <6678@chinet.UUCP> Date: 28 Sep 88 20:29:19 GMT References: <2302@att.ATT.COM> Reply-To: les@chinet.chi.il.us (Leslie Mikesell) Organization: Chinet - Public Access Unix Lines: 20 >The 'att' site in Middletown NJ lost its /usr/spool >file system over Friday night. Not to pick on this particular incident, but this seems like a general problem. Has anyone implemented a scheme to automatically notice when mail is lost? I work with a proprietary message system (actually I ported it to unix keeping parts of an old design) that expects tty-like devices (i.e. unreliable) as the end points. Each message is assigned an input sequence number and when it is sent out, it gets a time-stamp and an output sequence number added to the bottom. Each morning, a message is sent to each station with the number of messages it sent and (should have) received the previous day. Thus if the operator logs the sequence numbers she will notice any missed messages and can recall them. Obviously, this is made possible by running everything through a single hub, but I would like to know if any similar multi-host systems exist. I am starting to gateway into other delivery methods and would like to keep the reliability that we have now. Les Mikesell