Re: Hot Standby (or Failover) support.

In article <hackCzq7Ln.H65_at_netcom.com>, hack_at_netcom.com (Magick) writes:
|> In article <3atped$1unp_at_steamer.clam.com>,
|> Robert Metcalf <bobmet_at_steamer.clam.com> wrote:
|> >In article <89E152B.0389001DA2.uuout_at_compudata.com>,
|> >BARRY ROOMBERG <barry.roomberg_at_compudata.com> wrote:
|> >>-> Can anyone tell me what Oracle offers for "Hot Standby" (normally
|> >>-> automatic) or "Failover" (normally manual) support? I'm particularly
|> >>-> interested in Sun, HP, DEC(Alpha), IBM RS/6000 and NT machines.
...

|> >HACMP/6000 is an IBM LPP for the RS/6000 that enables a
|> >cluster (2-4 RS/6000s) to provide highly available services to clients,
|> >with minimal interruption in the event of system or component failure.
|> >In non-concurrent mode, one node is active and one is a standby.
|> >When the active node fails, it's applications, disk resources,
|> >and IP Address can be automatically taken over by a "standby" node.
|> >Clients experience a brief interruption in service, and then can continue
|> >processing. If a component (physical volume, communication adapter) fails,
|> >mirror or standby components step in for the failed original.
 ...
|> >
|> >--
|> >Bob Metcalf CLaM Associates 617-621-2542 (v)
|> > 101 Main Street, 5th Floor 617-252-0820 (f)
|> >bobmet_at_clam.com Cambridge, MA 02142
|>
|> Now ask him if anyone in the real world is using this in a
|> production environment -- not yet. The one customer that
|> is scheduled to be using this is still waiting for all the
|> vaporware to flesh out. If they (IBM & CLAM) ever get all
|> the details worked out, this could be pretty slick, but
|> so far all the current guinea pig has gotten is a lot of
|> promises and missed deadlines.

Hack:

We will be using HACAMP very soon in a production environement. Is your statement directed at HACMP in general or the lock mananger supporton on the rs/6000 to do OPS ? It is my understanding that there are many people who rely on HACMP for failover type services. I have no info on the oracle lock manager for rs/6000 but we are going to be setting up a pretty complicated 3-way HACMP cluster within the next several months. Your statement is somewhat unclear. HACMP is considered to be the limo for this type of service. ATT's lifekeeper is also very nice.

We are also going to be running OPS on NCR 3000 boxes. ATT is the original architect of the distributed lock manager for shared oracle databases on unix platform. Their dlm is really nice. I have it installed and up and running. OPS is not applicable to every type of oracle application and should probably only be deployed to solve certain types of problems. We are going to be using it to provide a shared path to our oracle databases for redundancy purposes. In actuality we will probably not run our databases everyday in a shared mode. Its a nice layer to have under your databases - provides some real flexability. Only problem is that right now everything has to be raw. In the next year to so we will start to see concurrent and cluster file systems coming out from IBM and ATT. Now that is probably someways off!

If you have addition experiences with OPS, HACMP, etc. continue to post. I am very interested and will do the same !

-- 

Thanks,
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Joe Minnich                  jminnich_at_bugaboo.ssnet.com