Re: Hot-Stdby-DB vs. Parallel-Server

The 3 second failover is probably true - but detection may require a lot more time, and starting up processes on the DR site will be incredibly longer. I'd be surprised that 3-10 minutes is doable in a large system.

That said, there are a lot of good points to Veritas and I hear Veritas is working on VCS-OPS certification for later this year, probably for Oracle9i (that's Oracle 8.2).

There is a huge amounbt of information at the Veritas-Oracle-Sun (VOS) and the EMC-Cisco-Oracle (ECO) sites, including phenomenal docco on how to built HA environments. Check out http://www.VOSinitiative.com and http://www.eECOstructure.com

/Hans

Andrei wrote:

> if you're talking about VCS (Veritas Cluster Server)
> then 3 seconds is bullsh!t
> more like 3-10 mins (depending on the number of dbs, applications,
> mount points, etc)
>
> On Tue, 1 May 2001 10:39:25 +0200, "Ian Ledzion"
> <ian.ledzion_at_lgxbow.com> wrote:
>
> >We looked at a solution by Veritas using Oracle on Sun Solaris. As Andrew
> >said, you can do it with fibre, and have upto 9km between sites. If one
> >site goes down they claim 2-3 seconds switchover.
> >
> >"Andrew Mobbs" <andrewm_at_chiark.greenend.org.uk> wrote in message
> >news:EHp*nq2Uo_at_news.chiark.greenend.org.uk...
> >> Sybrand Bakker <postbus_at_sybrandb.demon.nl> wrote:
> >> >One of the main features of Oracle Parallel Server, is that there are two
> >> >servers serving the same disks.
> >> >Hence the servers need to be in the same computer room.
> >> >A client may not want that for obvious reasons (if there is a fire in the
> >> >computer room, both servers will burn down)
> >> >So, there are cases where Hot Standby is the best you can do.
> >>
> >> Fibre attached storage can give you a couple of kilometres between
> >> servers (in theory, never seen it implemented myself).
> >>
> >> --
> >> Andrew Mobbs - http://www.chiark.greenend.org.uk/~andrewm/
> >
> >
>
> ---------------
> In case I forgot to mention:
> We use Oracle 7.3.4 and 8.1.6 on Solaris 2.6, 2.7 boxes
> ---------------
> Andrey Dmitriev eFax: (978) 383-5892 Daytime: (917) 750-3630
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Received on Fri May 04 2001 - 23:42:55 CDT