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Partitions and Data Tiers

Creating a partition allows you to improve search performance by searching over a smaller number of messages. Use the Partitions page to set up and manage partitions. To access the Partitions page, go to Manage Data > Logs > Partitions.


A partition stores your data in an index separate from the rest of your account's data so you can optimize searchesmanage variable retention, and specify certain data to forward to S3.


Data stored in a partition is not stored anywhere else. 

Partitions route your data to an index becoming a separate subset of data in your account. Creating smaller and separate subsets of data is central to search optimization. When you run a search against an index, results are returned more quickly and efficiently because the search runs against a smaller data set.

After routing messages to a partition, you can reference it in your search by using the field _index with the partition's name. See Optimizing Search with Partitions for details.

Partitions ingest your messages in real time. They differ from scheduled views in that partitions don’t backfill with aggregate data. They begin building a non-aggregate index from the time the partition is created and index only the data moving forward. Scheduled views backfill with aggregate data, meaning that all data that extends back to the start date of the view query is added to the view.

You define the data that will reside in a partition by defining a routing expression, which is similar to a log query, but with certain restrictions in terms of the operators you can include. Each partition's routing expression is applied to all messages as they are ingested to Sumo Logic. If a message matches the partition’s routing expression, it is added to the partition.


  • To create and manage partitions, you must be an Admin or you must have the Manage Partitions role capability
  • There is a limit of 50 partitions per account.
  • You can make the following edits to an existing partition:
    • You can change the routing expression, unless the partition is decommissioned.
  • You cannot make the following changes to a partition: 
    • You can’t change or reuse a partition name.
    • You can’t change the data tier the partition resides in.
  • Partitions cannot be deleted, although you can decommission them. This is because a partition may include log messages that aren’t stored anywhere else, so if it’s deleted, messages will be lost. If you no longer need a partition, you can decommission it.
  • Partition names cannot start with sumologic_ or an underscore _

Micro Lesson: Partitions Basics


In this section, we'll introduce the following concepts:

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