Splunk CIM model

[ips_mandar]

Hi 
I have currently 5-6 index setup where consider abc as fieldname , which is extracted at index time and same fieldname is called with different name in different indexes like cde, efg . Now I  want to create common field name for all these different fieldnames extracted at indextime.
-What would be best way to achieve it and I want to take advantage of index time extracted fields?  
I checked CIM model but does not fit as per my data. so even if I created data model including all my index and then if I calculate fields to use one common name but it will not take any advantage of index time extracted fields.

[richgalloway · Accepted solution]

One method is to add INGEST_EVAL settings in the transforms.conf files for the various sourcetypes that write to those indexes.  For example:

[setcommonnameabc]
INGEST_EVAL commonfield=abc

[setcommonnamecde]
INGEST_EVAL commonfield=cde

[setcommonnamedef]
INGEST_EVAL commonfield=def

[ips_mandar]

Thanks @richgalloway  
some of my index data is coming from database using db connect app. so can I apply ingest-eval on that index as well?
One more issue I am facing is that- 
I have summary index (test_summary_index)  and I have abc fieldname in summary index as well. but problem is when I set fields.conf -
[abc]
indexed=true

then splunk will try to search fieldname abc in metadata but it won't find any results for summary index .
for ex. index="test_summary_index" abc="123"
This query won't return any results.
What could be solution for this issue?
Can CIM be useful?

[richgalloway]

I'm not sure if INGEST_EVAL can be applied to DBX data.  I think it can, but am not positive.

Please post a new question about your summary index problem.

The concept behind CIM is to use common field names among your various sourcetypes so correlation of events is easier.  CIM uses datamodels to do that, but you can do it yourself with careful onboarding (using aliases, for example).