From: nyaghma
Date: March 1 2012 11:03pm
Subject: Question about developing mysql cluster
List-Archive: http://lists.mysql.com/mysqldoc/196
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Hi,

I am Navid Yaghmazaeh, a Ph.D. student at the University of Texas at =20
Austin. I'm member of a team working on a research project about =20
adding some features to mysql cluster. A brief description of our =20
project is that we are working on making mysql more durable by storing =20
logs on disk at the end of each transaction. We want
to add this property to mysql in parallel to current property of =20
making state of the system durable by epochs, so mysql cluster could =20
support both level of durability at the same time.

In order to do so, we have to modify the Ndb code. I have some =20
question about changing the mysql cluster code and if you could help =20
me I would be greatly thankful.

Could you please link me to documents about protocols used in Ndb, =20
specially in Ndb kernel, such as global checkpointing protocol or two =20
phase commit protocol and protocols for committing transactions.? I =20
have read the "Mysql Cluster API Developer Guide", but it is mostly =20
about the Ndb API, and does not describe the Ndb kernel and the =20
protocols used there.

Could please guide me where could be a good point to start modifying =20
Ndb kernel code? As Ndb is a huge code and has many different modules =20
which work together though they are separate in semantics, it would =20
help a lot if you could help me about choosing a good starting point =20
for applying changes.

Is there any available unit and integrity tests available in order to =20
be able to test our changes and make sure everything is going well? =20
How Could I test modules I modify and the functionality of the whole =20
mysql cluster?

I would greatly appreciate your help in advance. Please do not =20
hesitate to ask me to describe more if any thing about our work is not =20
clear to you. I would be more than happy to discuss our work with you =20
and hear your comments.

Thank you so much.
Regards,

Navid Yaghmazadeh
Ph.D. Student
Computer Science department
University of Texas at Austin