Splunk Search

case sensitive dedup?

blee_i365
Explorer

I have two hosts, one named lower case 'server01', the other named upper case 'SERVER01'. When I do a search such as "foo | dedup host", I only get either server01 or SERVER01, and never both, because apparently dedup is performing case insensitive comparisons. Is there a way to enable case sensitivity?

Thanks much in Advance.

0 Karma
1 Solution

RyanAdams
Engager

Generally (from a networking perspective) you shouldn't have two hosts with the same hostname. However, since you do, you could use regex to determine if the hostname is upper or lowercase. For example:

... | rex field=host "(?P<upperHost>[A-Z0-9]+)"| eval hostCase=if(isnotnull(upperHost), "Upper", "Lower")

Then you could run the dedup command against both the host name and the value of hostCase:

... | dedup host, hostCase

That should leave both hostnames in the results.

PS: I havn't been able to test this so the isnotnull() may not work. Instead you may want to use upperHost="".

View solution in original post

0 Karma

TobiasBoone
Communicator

dedup really needs to have an in-case sensitivity option

RyanAdams
Engager

Generally (from a networking perspective) you shouldn't have two hosts with the same hostname. However, since you do, you could use regex to determine if the hostname is upper or lowercase. For example:

... | rex field=host "(?P<upperHost>[A-Z0-9]+)"| eval hostCase=if(isnotnull(upperHost), "Upper", "Lower")

Then you could run the dedup command against both the host name and the value of hostCase:

... | dedup host, hostCase

That should leave both hostnames in the results.

PS: I havn't been able to test this so the isnotnull() may not work. Instead you may want to use upperHost="".

0 Karma
Got questions? Get answers!

Join the Splunk Community Slack to learn, troubleshoot, and make connections with fellow Splunk practitioners in real time!

Meet up IRL or virtually!

Join Splunk User Groups to connect and learn in-person by region or remotely by topic or industry.

Get Updates on the Splunk Community!

From Data to Insight: Announcing the Winners of the Splunk Dashboard Contest

Hi Splunkers, First off, thank you to everyone who participated in our very first From Data to Insight: The ...

Splunk Developers: Construct Your Future at the .conf26 Builder Bar

Calling all Splunk architects, platform admins, and app developers: the site is open, and the blueprints are ...

Quick connection discovery mode for forwarders

When a Splunk forwarder loses connectivity to its indexers, it does not always reconnect immediately. In many ...