Retrieve events from indexes
With the Splunk platform, you have always been able to create new indexes and manage where you want to store your data. Additionally, when you have data split across different indexes, you can search multiple indexes at once, using the index field.
Specify one or multiple indexes to search
The Splunk administrator can set the default indexes that a user searches. Based on the roles and permissions, the user might have access to one or many indexes. For example the user might be able to only search main or all public indexes. The user can then specify a subset of these indexes, either an individual index or multiple indexes, to search. For more information about setting up users and roles, see "About users and roles" in Securing Splunk Enterprise.
For more information about managing your indexes and setting up multiple indexes, see the "About managing indexes" in the Managing Indexers and Clusters manual.
Control index access using Splunk Web
1. Navigate to Settings > Roles.
2. Click the role that the User has been assigned to.
3. Click on "3. Indexes".
4. Control the indexes that particular role has access to, as well as the default search indexes.
Syntax
You can specify different indexes to search in the same way that you specify field names and values. In this case, the field name is index and the field value is the name of a particular index:
index=<indexname>
Specify groups of indexes using wildcards
You can use a wildcard ( * ) to specify groups of indexes. For example, if you want to search both "mail" and "main" indexes, search for:
index=mai*
To match internal indexes using a wildcard, use _* in your search, like this:
index=_*You can use a wildcard to to match all of the non-internal indexes or all of the internal indexes. But, you can't use a wildcard to match both types of indexes at the same time.
Partition different searches using parentheses
You can also use parentheses to partition different searches to certain indexes. See Example 3 for details.
Note: When you type "index=" into the search bar, typeahead indicates all the indexes that you can search, based on your roles and permissions settings.
Examples
Example 1: Search across all public indexes.
index=*Example 2: Search across all indexes, public and internal.
index=* OR index=_*Example 3: Partition different searches to different indexes; in this example, you're searching three different indexes: main, _internal, and mail. You want to see events that match "error" in all three indexes; but also, errors that match "warn" in main or "failed" in mail.
(index=main (error OR warn)) OR (index=_internal error) OR (index=mail (error OR failed))Example 4: Search across multiple indexes on different distributed Splunk servers.
(splunk_server=local index=main 404 ip=10.0.0.0/16) OR (splunk_server=remote index=mail user=admin)Not finding the events you're looking for?
When you add an input, the input gets added relative to the app you're in. Some apps write input data to their own specific index (for example, the Splunk App for Unix and Linux uses the 'os' index).