11g R2 RAC Installation

During this time, I received a lot of consultation on the database of 11 GB. Maybe the database of 11G has gradually penetrated into the market. In the past few days, I started to try to install and test the RAC on the 11g.

In general, the RAC of 11g R2 is not too troublesome. On the contrary, the architecture of 11g R2 is more simplified in some aspects.

The preparation work is similar to that of 10g RAC,

The main difference is,

1. In 11g R2, clusterware is integrated into grid infrastructure. Therefore, you must first install grid infrastructure without the installation package of clusterware.

2. scan is introduced in 11g R2. If you want to select the GNS method, you need to configure DNS and DHCP. If you do not use GNS, you can also manually specify the hosts in the same way as 10 Gb.

3. the equivement configuration has also been improved in 11 GB. If it is installed through oui, ssh connnective can be directly implemented in this step, if it is manually installed, in SSH mode, you must first configure the equivalence.

4. Differences between ASM, 11g R2, ASM is also integrated in Grid infrastucture, and ASM disk can be used as the storage of OCR and vote disk.

5. OCR and vote disk are stored together in 11g R2. In 11g R2, raw devices is not supported. OCR/vote disk can only be used with ASM disk or clusterware file system.

6. The new fixup function allows you to use the fixup function for some pre-installation settings.

7. You can run deinstall for uninstallation and redo CRS by using rootcrs. pl-deconfig instead of rootdelete.

8. The running process is different.
The install type includes for cluster, for standalone server, and SW-only. Among them, for cluster and for standalone server are even more suspicious about the issue of some clusters in the ASM of a single instance. Of course, there are some new features of HA and restart.

The rest is the next step.

Finally, grid infrastructure has higher hardware requirements and you have to wait for more time.

For more information, refer to the official Oracle documents. For more information, refer to Hunter'sArticle.