RE: [cobalt-users] High availability/redundancy on Cobalt

["David Thornton" <dave@xxxxxxxxxxxxxxx>]

No you just have to have 2 Raqs and the software.
dave



----- Original Message -----
From: "Chip" <chip@xxxxxxxxxx>
To: <cobalt-users@xxxxxxxxxxxxxxx>
Sent: Friday, June 30, 2000 5:02 PM
Subject: [cobalt-users] High availability/redundancy on Cobalt


>
> Chip wrote:
>  > I looked into the redundant solution offered by Cobalt, but it
> apparently
>  > involves having the two Raqs close enough to each other that a serial
> cable
>  > can be run between them... which defeats my intended purpose of having
> the
>  > redundant Raqs in different NOCs.
>
> To which  H.P. responded:
> aren`t they connected using the second network interface (which could be
> routed) ?
>
> Um, don't know... I was told by a Cobalt corporate sales rep that the
> interconnection was via a serial cable that had to run between each
> unit.  I asked if this meant that they had to be physically close to one
> another and he said "yes".
>
> really redundant servers in different nocs are a *really expensive*
> project, as you would have to use at least mirroring and monitoring,
> using a seperated dedicated line (as you might want redundancy for the
> network connection and a safe way to transmit data between the units).
>
> Well, I'm looking at "high availability" rather than "zero down time",
with
> the idea being that the slave would ping the master unit, and "wake up" on
> a ping failure after so many seconds.  Obviously it wouldn't be *quite* up
> to date if there were constant database updates, but for our customers, it
> would be a satisfactory solution at much lower cost that 100% redundancy.
>
>
>
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