Messages in this thread | | | From | "Sean Hunter" <> | Date | Sat, 3 Jul 1999 09:29:24 +0100 | Subject | High Availability (Was Re: fsck is dead) |
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In my experience with a number of very large banks etc, when people need mission-critical fault-tolerant systems, they use a complete hardware/OS/software solution such as tandem. For normal high avaliability, something like a unix H/A pair (such as two suns) is very common.
If you think fsck time is a factor in the equation then your H/A solution is almost certainly inadequate to your needs. Only a slahdotter would think that an ftp server had a mission-critical H/A requirement. Think about swift message servers (where every message is a direct transfer of funds), think about settlement systems (which settle transactions worth sometimes hundreds of millions), and think about trading systems. For example, I worked in a bank where someone forgot to send a fax confirmation and it cost the bank £1000000.
fsck time isn't a consideration in these sorts of settings. Its much more important in the more common case where you just want your web/ftp/quakeserver up asap.
Sean Hunter
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