Re:About parallel server

From: <dgoulet_at_vicr.com>
Date: Wed, 30 May 2001 14:56:11 -0700
Message-ID: <F001.00314A90.20010530144802@fatcity.com>

Fernando,

    Replies included in your original mail, but in addition:

    Parallel server is a separately priced option from Oracle and it is pricey. Second you may need specific software from you OS vendor to coordinate the file sharing between the servers, again an additional expense.

Dick Goulet

____________________Reply Separator____________________
Author: "Fernando Papa" <fpapa_at_elsitio.com.ar>
Date:       5/30/2001 2:07 PM

Hi everybody!

I have some questions about parallel server. Now we have only one instance "stand-alone" (no parallel), but we are thinking to switch to parallel server because we have a couple of sparc 3500 and nobody are using it, and we think it's good for increase our processing power.

The problem is I didn't work with parallel server and I have a lot of questions about it:

1. Is mandatory to use raw devices for control files, redo logs & data files?
   --> Data files yes, redo and control files can be on cooked file system.
   
2. How we transfer our cooked data files to raw devices data files? import/export? or exist another better (fast) method?
   --> To the best of my knowledge your going to have to rebuild the database from
   scratch so imp/exp is your only option.
3. If I start with only one node, performance will be the same of one single instance (no parallel)?
   --> Yes and NO, raw devices run a little faster than cooked files since the OS's
   buffer cache is not in the middle.
4. Somebody know how to work with raw devices under solaris? any link? I try to found someting in metalink but there's no samples...
   --> Working with raw devices is very different from cooked file systems. If you
   don't have an experienced Unix admin you could be in serious trouble.
5. What about backup? I can't put tablespaces in backup mode and copy with cp... maybe it's time to use rman?
   --> Rman can handle the backups, but a file system level backup is different.
   CP does not work anymore, nor does fbackup, or tar. You'll need specialized software for the purpose.

Thanks in advance!

--

Fernando O. Papa
DBA
El Sitio - Infraestructura
(54-11) 4339-3854

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Author: Fernando Papa
  INET: fpapa_at_elsitio.com.ar

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