Internet Methodologies Journal And News

both myisam and innodb are storange enginein sql.
innodb support transaction, foreign key while myisam not
support transaction.
Other differences are : 

1. innodb requires more RAM than mysiam
2. myisam relies on OS for caching while innodb caches with
in the engine itself.

3. Most preffered is innodb because

- Transaction safe
-It has commit, rollback, and crash recovery capabailities
- Innodb is designed for maximum performance when processing
large volumes of data.
InnoDB: Row level locking, Transaction support, forgin key
constrant and crash recovery.

MyISAM: Much more conservate approach to disk space
management each MyISAM table store in a separate file. in
MyISAM memory and space usage, full text indexing support,
table based locking, bulk insert capabilities and speed are
plus factor but crushes recovery would be the horror story.

As general approach, if you have a more reads use MyISAM and
if you have a more update use InnoDB.