Redundant Servers
Mike McGrath
mmcgrath at iesabroad.org
Mon May 16 04:14:40 UTC 2005
> -----Original Message-----
> From: fedora-list-bounces at redhat.com
> [mailto:fedora-list-bounces at redhat.com] On Behalf Of rado
> Sent: Sunday, May 15, 2005 9:45 AM
> To: fedora
> Subject: Re: Redundant Servers
>
> Hi!
>
> Whew, looks like you really went thru lots of trouble
> preparing for the redundancy thang!
>
> kk...the tech we talking about here is HA(High Availibility)
> google around for this.
>
> I recently put together 2 HA servers. It seems that you went
> thru lots of pain and expense to put together 2 "twin"
> hardware systems together which is really good but not
> necessary IMHO.
>
> Bob Chiodini really got me started...He put together an HA
> system at the space center bout 3 yrs ago and it's still
> doing it's thing and He is actually my mentor w/this stuff.
>
> 1st off what are you really looking to do? are you looking to
> help out your busy server and putting the same data on line
> or are you just wanting to cover your servers hardware
> failure possiblilities?
>
> I am set up to cover server failure NOT traffic problems.
> Bob knows the traffic end w/his heartbeat software.
>
> To add this extra point of failure tho, there are also a
> couple of different routes to take.
>
> Bob's route, is to have one box deemed as the master...the
> master goes down ...the slave covers for it...the master
> comes back...the slave relinquishes his serving duties and
> the master takes over.
>
> my route, the first box up is the master...the next box up is
> the slave...master goes down ...master duties now are the
> (has been) slave.
> the orig. slave is now the master... the other box comes
> back...it's the slave.
>
> all the time...syncing duties are carried on both ways
> depending on who has the freshest data
>
> hope this helps
>
> john rose
>
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>
If you know of any good literature (online or not) concerning this
subject I'd love to read it. Know of anything?
-Mike
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