Let’s first discuss how RAC traffic works before continuing. Environment for the discussion is: 2 node cluster with 8K database block size, UDP protocol is used for cache fusion. (BTW, UDP and RDS protocols are supported in UNIX platform; whereas Windows uses TCP protocol).
UDP protocol, fragmentation, and assembly
UDP Protocol is an higher level protocol stack, and it is implemented over IP Protocol ( UDP/IP). Cache Fusion uses UDP protocol to send packets over the wire (Exadata uses RDS protocol though).
Just a quick note, I will be conducting next 2-week advanced RAC Training, online class in March 26-30 and April 9-13.
You can find agenda and other details here .
I received few emails about the training outline. You can find the outline below:
Yes, I do accept Purchase Orders and can invoice you
This video was created circa July 2011. Click the Read More link to review the video. Version Oracle Database 220.127.116.11
Synopsis: Essentially, we probe the importance of LMS processes using DTrace. Explain why LMS should run in elevated priority. How to review deep statistics about LMS processes and much more.
I will be delivering an intense, advanced 2-week RAC training seminar in Aug 22-26 and Sep 19-23 with numerous demos, dumps and scripts. We will meet 4 hours per day, in a virtual world, 8AM-12 Noon Pacific time for those two weeks. Tanel has written has a great blog post about this seminar series Advanced RAC training.
If you like my presentations about RAC and performance tuning, you will love my seminar series. You will gain better understanding about RAC internals, and you will be able to advance your debugging and performance tuning skills attending my seminar series.
Join me and Let’s explore RAC further.