How we take dump with batch of records option?
Here is something you may find intriguing
SUGGESTION #1 : Let mysqldump create the batches
mysqldump already uses an option called --extended-insert. This will group a series of records that can be loaded in a single INSERT command. While you cannot use mysqldump to control the number of rows to be batched together, you can parse a mysqldump. Of course, these means you will have to script it in the language of your choice (Python, Perl, C++, etc).
For any given table in a mysqldump of a single database, you will see the following paradigm:
CREATE TABLE
LOCK TABLE
INSERT INTO ...
INSERT INTO ...
INSERT INTO ...
...
...
INSERT INTO ...
INSERT INTO ...
UNLOCK TABLES;

You could parse the mysqldump as follows:

Step01 : Get the next table name in the mysqldump
Step02 : Locate next INSERT INTO or UNLOCK TABLES;
Step03 : If you encounter UNLOCK TABLES;, goto Step01
Step04 : If you have no more tables, you are done
Step05 : Goto Step02

Each INSERT command you read has a certain number of rows. This number you cannot control unless you script to put them together in the number of rows you choose. I would advise against that be mysqld decided the best number of rows for that particular batch given the current configuration settings (perhaps the max_allowed_packet)
SUGGESTION #2 : Use --skip-extended-insert and batch them your way
When you deactivate --extended-insert, each INSERT command will have one row. You can collect the rows using a script and collect as many rows as you like.
CAVEATS

Please be a little conservative on the number of rows you choose to batches together.
You will take much longer to parse the mysqldump because of the mysqldump will be much longer.