(Fwd) Re: Oracle 8i and clustering

From: Eric D. Pierce <PierceED_at_csus.edu>
Date: Wed, 25 Jul 2001 18:19:12 -0700
Message-ID: <F001.003555AD.20010725183024@fatcity.com>

Forwarded message follows ------- To: Ali Mesdaq <AMesdaq_at_STBERNARD.COM> Date sent: Wed, 25 Jul 2001 14:12:34 -0700

I can't imagine that installing the oracle executables on shared storage would be a good idea.

see below for an Oracle tech note.

note that the shared storage has to be "raw".

I think I recall seeing a discussion about how OPS is going to be obsoleted and replaced by a better cluster technology.

I hope you can talk to Oracle Tech Support if you are the one doing this. I've heard that OPS is *the* nastiest Oracle configuration to setup.

regards,
ep

---forwarded message---

http://metalink.oracle.com

Doc ID:

        Note:119312.1
        Oracle Parallel Server on Windows NT
Type: 
        BULLETIN
Status: 
        PUBLISHED

                                                          Content Type: 
                                                                            TEXT/PLAIN
                                                          Creation Date: 
                                                                            07-SEP-2000
                                                          Last Revision Date: 
                                                                            05-FEB-2001

PURPOSE

This article documents how Oracle Parallel Server is implemented on Windows NT.

SCOPE & APPLICATION

This document is intended for people who administer Oracle Parallel Server on Windows NT.

Oracle Parallel Server on NT

1.OVERVIEW OF SYSTEM ARCHITECTURE
...

2.IMPLEMENTATION OF SHARED DISK Oracle Parallel Server requires a shared disk subsystem to contain shared partitions that are raw.

As Windows NT does not support a proper distributed file system, Oracle bypasses it by using raw devices. This

allows nodes running different instances to access shared disks. Data files, redo log files, and control files

are stored on the raw devices. The shared disks are then a collection of unformatted raw devices.

Raw devices are created on a disk that does not have a primary partition and has only one extended partition.

A raw partition is created when an extended partition is created and logical drives are assigned to it without

applying any formatting. The Windows NT Disk Administrator application allows you to create an extended partition

on a physical drive.

An Extended Partition points to raw space on the disk that can be assigned multiple logical drives for the

database files. It avoids the four-partition limit by allowing you to define large numbers of logical drives to

accommodate applications using Oracle on Windows NT. Logical partitions can then be given symbolic link names to free

up drive letters. This makes Oracle Parallel Server on Windows NT more scalable.

You need to create raw devices if you are creating a database manually,or using the Oracle Database Configuration

Assistant to create the files for the database. However, if you are using the Oracle Database Configuration Assistant,

a precise number of raw devices must be set up.

Raw devices are created prior to installation and creating a database.

3.DLM CONFIGURATION The Distributed Lock Manager (DLM) maintains a list of system resources and provides locking mechanisms to

control allocation and modification of Oracle resources. Resources are structures of data. The IDLM does not control

access to tables or anything in the database itself. Every process interested in the database resource protected by the

IDLM must open a lock on the resource.

...

RELATED DOCUMENTS

Oracle7 Server Release 7.3.3 for Windows NT Getting Started Oracle Parallel Server Release 7.3.3 for Windows NT Getting Started Oracle8 Release 8.0.3 for Digital Alpha Windows NT Getting Started Oracle8i Parallel Server Administrator's Guide .

On 24 Jul 2001, at 13:51, <AMesdaq_at_STBERNARD.COM>) wrote:

Date sent: Tue, 24 Jul 2001 13:51:48 -0700

> Does anyone know the proper way of installing oracle 8i on a cluster setup.
> i have 2 compaq computers in a cluster sharing 4 raid arrays. they are
> running win nt 4 enterprise edition. the cluster is already setup. but when
> i install oracle should i install to the shared volumes or install oracle
> locally on each server and just keep the data on a shared volume? any help
> would be nice. thank you
>

End of forwarded message ------- -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Eric D. Pierce INET: PierceED_at_csus.edu

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