Is msm serializes the whole session object or only changed attributes

[GoogleCodeExporter]

What steps will reproduce the problem?
1. How msm stores session values
2.
3.

What is the expected output? What do you see instead?
1. How msm stores session values in the memcached, is it serializes the whole 
session object or only changed attributes

2. Memcached stores as key/Value, but there are 3 fields(value), how these 3 
fields( flag, expiry time and actual value ) get stored in memcached server

What version of the product are you using? On what operating system?

Please provide any additional information below.

Original issue reported on code.google.com by yoga.und...@gmail.com on 24 Mar 2014 at 11:15

[GoogleCodeExporter]

The whole session if it has changed. Please use the mailing list to ask 
questions.

Original comment by martin.grotzke on 25 Mar 2014 at 12:15

• Changed state: Invalid