home *** CD-ROM | disk | FTP | other *** search
- Path: sparky!uunet!zephyr.ens.tek.com!uw-beaver!news.u.washington.edu!usenet.coe.montana.edu!rpi!scott.skidmore.edu!psinntp!psinntp!bacon!yen!chris
- From: chris@yen.imsi.com (Chris Payne)
- Newsgroups: comp.databases
- Subject: Re: Hot Standby DBMS's
- Message-ID: <CHRIS.92Aug25123032@yen.imsi.com>
- Date: 25 Aug 92 16:30:32 GMT
- References: <Bt6IsC.F00@world.std.com> <1992Aug19.052516.24063@anasaz>
- <1992Aug20.192538.17842@cbnewsl.cb.att.com> <BtB7Lo.26u@world.std.com>
- Sender: news@bacon.IMSI.COM
- Organization: Moore Capital Management
- Lines: 12
- In-reply-to: edwards@world.std.com's message of 21 Aug 92 01:17:47 GMT
- Originator: chris@yen
-
-
- One clean solution to the hot-backup equivalence problem is to
- serialize the request stream. Guarantee that when a credit precedes a
- debit on one db server, it precedes the debit on all active servers.
- If you want to catch-up a server which is down periodically, keep a
- copy of the request stream.
-
- Ken Birman's (?) group at Cornell has a product called ISIS which
- provides just this functionality. I think the firm is called Isis
- Development Corp.
-
- /c
-