Global Cluster, can you verify my config - setup - architecture ?
I need to build a Disaster Recovery using Veritas Cluster and VVR. I need to have HA on Oracle 10g and Tomcat. This should be cheap as possible. This is not so data-intensive application.
This would be only 2 servers setup. I will have 2 clusters. Each with 1 server. I will use local disks. Then there will be replication between and having a Global cluster.
This are the only 2 servers on network with no domain or DNS. So one of these servers should be DNS and Domain. I think the backup server should be domain and DNS server. Is this OKay ? Or the domain server should be on third server or both servers ? Isn't this (domain and DNS) a single point of failure ? I am not sure how to setup this.
I will use 5.1 VCS HA with VVR on Windows 2003 R2 SE. Any help or idea appreciated.
Hi Hraju, Ideally, the domain
Hi Hraju,
Ideally, the domain features should be on nodes not in the cluster. I'm not sure if Oracle has a problem running on domain controller but I have seen issues with MSDTC when used on domain controllers in a cluster. I'm also not sure if you are going to use MSDTC in your configuration or not.
You need to be aware that you may run into problems with using local storage. If you have internal RAID controllers they may not allow the correct SCSI commands to the disks to allow the cluster to control them correctly. I would suggest running the following test to see if you will have problems.
1. Create a clustered disk group with the internal disk(s) (they have to different physical disks than what is used by the OS - system and boot disks.)
2. Deport the clustered disk group.
3. Import the clustered disk group.
If you can create it, deport and import it again without errors then you will be fine. If not you will need to contact Technical Support to see if there is something that they can do for you.
If you just have a problem creating the disk group, you may simply need to run the following command:
vxclus usesystembus on
This will allow you to create clustered disk groups on the same bus that the system and boot disks are on.
You might also be able to get around the use of a Domain all together. The cluster can be configured manually without the wizards or domain. However, you should contact your sale rep to talk to them about a support exception to maintain a supported configuration without a domain and to get the steps needed to configure it.
Thanks,
Wally
Thank you Wally for answer.
Thank you Wally for answer.
I will test internall raid controller as you suggested. I will not use MSDTC. But I am still not sure, if I should use domain controller on both Global cluster sites or only on one.
If you are concerned with
If you are concerned with loosing 1 site enirely then you should have domain controllers avaialable at each site. Having doman controllers at each site is good if you loose communications completely between the sites. The DC at both sites will ensure that site is usable even without access to anything from the other site.
-Wally
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