A Brief Pep talk
Since the last article, I have received several e-mails requesting
a description on the installation of Clusterware on a 2-node windows 2003
server with VMware. We will cover the installation issue on RHEL4 Release 2
(Nahant) as well, in a later article.
You hear all kinds of claims and see written material that says
a lot but actually proves or demonstrates very little. The purpose of showing
errors is to show that not everything works like a charm. My purpose in writing
this article is to show you every detailed version of the scenario that you
will be trying out with the necessary tools in hand.
Prerequisites:
-
VMware software: A VMware workstation or an Evaluation
version of a GSX Server.
-
A Server (if you're lucky) or just a plain PC/Desktop with 2G
memory. (Remember we will do a real 2-node scenario here so give those machines
at least 800 Mb each).
-
Lots of patience (This is sage advice for us all).
You will mess things up now and then, so have patience.
-
If you can set up a simple machine [well you guessed it right,
another VM with a simple LDAP(ADS)/DNS] server then it's good BUT if you
do have an active/working LDAP/DNS server the better. I will not go into detail
on creating an ADS /DNS server; it is simple. Do a search on Google and you
will find tons of information on that.
-
BACKUP!!! The great thing about VMware is that you can do
a progressive backup, meaning you can go on with creating Virtual Machines >
Successful? > Back up > Install OS's successful? > Overwrite the
Backup > and so on. This way you will save a lot of time and frustration.
-
Oracle software: Go to Oracle's
site and download the necessary software (that would be Database and
Clusterware). If you do not have an account at OTN, get it. It's FREE!
OK now let's take a look at the overview/architecture of our
servers.
Architecture Overview of the 2-node Oracle 10g Release
2 RAC on Windows 2003 Virtual Machine with VMware
I always draw a simple sketch of what I will be needing,
what I have in my hand and how the whole architecture will look when I am done with
the setup and of course, keep the scalability factor at the back of your mind, as
we want to build a 64 node RAC cluster, right? Remember Planning is crucial.
All right then, without much ado let's started with the Clusterware setup.
Finally Setting up the Virtual Machines for Oracle 10g Release 2
Clusterware Installation
Your Clusterware is very sensitive to a lot of scenarios and doing
everything on the Virtual Machines makes it all the more challenging. You need
to set up Shared disks.
Setting up Shared SCSI Disks
Step 1: We did see in the last article how you can set up shared
disks with the plaindisk scenario, well now I have a better proposal. Just go
to your vmware root directory and do the following:
D:\Program Files\VMware\VMware Workstation> vmware-vdiskmanager.exe -c
-s 10Gb -a lsilogic -t 2 ASM1.vmdk
Check out the command reference
Exactly one major option should be specified.
VMware Virtual Disk Manager - build 13124.
Usage: vmware-vdiskmanager.exe OPTIONS diskName | drive-letter:
Offline disk manipulation utility
Options:
-c | | : create disk; need to specify other create
options |
-d | | : defragment the specified virtual disk |
-k | | : shrink the specified virtual disk |
-n <source-disk> | | : rename the specified virtual disk; need
to specify destination disk-name |
-p | | : prepare the mounted virtual disk specified by the drive-letter for shrinking |
-q | | : do not log messages |
-r <source-disk> | | : convert the specified disk; need to
specify destination disk-type |
-x <new-capacity> | | : expand the disk to the specified capacity |
Additional options for create and convert:
" -a <adapter> | : adapter type (ide, buslogic or lsilogic) |
-s <size> | : capacity of the virtual disk |
-t <disk-type> | : disk type id |
Disk types:
0 | : single growable virtual disk |
1 | : growable virtual disk split in 2Gb files |
2 | : preallocated virtual disk |
3 | : preallocated virtual disk split in 2Gb files |
The capacity can be specified in sectors, Kb, Mb or Gb.
The acceptable ranges:
ide adapter : [100.0Mb, 950.0Gb]
scsi adapter: [100.0Mb, 950.0Gb]
As you can see, I choose lsilogic, which was default to my environment. In
any case, go ahead and create the *.vmdk disks. I would suggest that you
allocate all space to it, it is faster to create a *growable* disk but
clusterware might complain during installation, as the disk has to grow during
installation.
Step 2: Now try to store all your *.vmdk disks in separate folders,
something like this. And remember what I said about backups, then all you need
is to just backup your root folder W2K3.
Step 3: Edit both the Virtual Machines *.vmx files like this:
Step 4: Having created the disks, you will need to convert these
newly created and discovered disks on both machines into RAW disks before going
for OCFS and/or ASM scenario. See Part II of
this series for more details.
Step 5: Enable automount on all nodes.
Previous
Next
Back to DBAsupport.com
