Version: 9.4.2.v20170220 |

Non-Clustered Session Management: Memory
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## Non-Clustered Session Management: Memory

Non-clustered, in-memory-only is the default style of Session Management. In previous versions of Jetty this was referred to as "hash" sessions, as they were stored in a `HashMap` in memory. When using the Jetty distribution, if you do not configure any session module, this will be enabled by default.

Specifically, Jetty will hook up:

A `DefaultSessionIdManager`
  - Produces unique session ids and supports cross-context dispatch re-use of session ids
A `HouseKeeper`
  - Scavenges for expired sessions every 10 mins
A `DefaultSessionCache` per context
  - Keeps session objects in memory
A `NullSessionDataStore` per context
  - No persistence of sessions

If you wish to change any of the default configuration, enable the `session-cache-hash` module.

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