Hey premranjithj !
The props.conf lives on the indexer,heavy forwarder, and/or search head and this applies "rules" while the data is getting parsed. You can specify how it gets timestamped, the format of the timestamp, how the events should break etc..
So basically, the props.conf will apply your configuration settings to your data while being indexed
http://docs.splunk.com/Documentation/Splunk/latest/Admin/Propsconf
An example of a stanza in props.conf will look like this
[log4j]
SHOULD_LINEMERGE=true
BREAK_ONLY_BEFORE = ^\$\$\s[A-Z]{5}\s\$\$
TRUNCATE = 30000
MAX_EVENTS = 100000
You can refer this answers link as well:
https://answers.splunk.com/answers/119/what-is-role-of-transforms-conf-vs-props-conf-for-field-extra...
Transforms is used for configuring regex.
https://docs.splunk.com/Documentation/Splunk/latest/Admin/Transformsconf
Hope this helps!!
