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VA Technical Reference Model v 24.4

Apache ZooKeeper
Apache ZooKeeper Technology

General InformationGeneral Information help

Technologies must be operated and maintained in accordance with Federal and Department security and privacy policies and guidelines. More information on the proper use of the TRM can be found on the TRM Proper Use Tab/Section.

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Description: Apache ZooKeeper is a distributed, open source coordination service for distributed applications. This technology is a centralized service for implementing higher level services for synchronization, configuration maintenance, and groups and naming. Apache ZooKeeper is built on a hierarchal namespace, organized similarly to a standard file system, which allows distributed processes to coordinate. This technology is intended to be replicated over a series of hosts in order to maintain an in-memory image in a persistent store. Additionally, this technology provides a simple Application Programming Interface (API) that supports basic programming functions.

This technology has two deployment methods; as a standalone operation, and as a clustered, multi-server, setup. The standalone operation is installed to a single client or server instance via a Java Archive (JAR) file. The clustered setup is deployed as a distributed server of at least three machines.

This technology uses an in-memory database, configured by the user on a cluster of server instances, to store and share data via a local network connection.
Technology/Standard Usage Requirements: Users must ensure their use of this technology/standard is consistent with VA policies and standards, including, but not limited to, VA Handbooks 6102 and 6500; VA Directives 6004, 6513, and 6517; and National Institute of Standards and Technology (NIST) standards, including Federal Information Processing Standards (FIPS). Users must ensure sensitive data is properly protected in compliance with all VA regulations. Prior to use of this technology, users should check with their supervisor, Information Security Officer (ISO), Facility Chief Information Officer (CIO), or local Office of Information and Technology (OI&T) representative to ensure that all actions are consistent with current VA policies and procedures prior to implementation.
Section 508 Information: This technology has not been assessed by the Section 508 Office. The Implementer of this technology has the responsibility to ensure the version deployed is 508-compliant. Section 508 compliance may be reviewed by the Section 508 Office and appropriate remedial action required if necessary. For additional information or assistance regarding Section 508, please contact the Section 508 Office at
Decision: View Decisions

Decision Source: TRM Mgmt Group
Decision Process: One-VA TRM v23.10
Decision Date: 10/26/2023 at 19:18:33 UTC
Introduced By: TRM Request
Vendor Name: Apache Software Foundation (ASF)
- The information contained on this page is accurate as of the Decision Date (10/26/2023 at 19:18:33 UTC).