K14462: Overview of BIG-IP AAM daemons (11.x - 15.x)

Published Date: Dec 12, 2014
Updated Date: Feb 21, 2023

This page applies to BIG-IP^® 11.x. For information about other versions, refer to the following pages:

For information about daemons from other modules, refer to the following pages.

When the BIG-IP system is licensed with BIG-IP WebAccelerator^™, the BIG-IP system runs an additional set of processes on top of the standard set of BIG-IP processes. The following table lists the core BIG-IP WebAccelerator processes, and indicates the impact to the BIG-IP WebAccelerator operation if the process is not running:

Overview of BIG-IP AAM daemons (11.x – 15.x)
Daemon	Description	Impact if not running	Logs to
wamd	The wamd process performs all of the web acceleration according to the policy specified in the application configuration. The wamd processes client requests from TMM, and communicates with the origin web servers. Additionally, it performs the following tasks: Image optimization PDF linearization Content invalidation Statistics reporting	BIG-IP AAM will not accelerate HTTP traffic.	/var/log/wa/wamd.log
datastor	Datastor provides an abstraction layer over large storage systems, giving a unified interface to storage objects for BIG-IP applications on disk. Datastor is the interface to all BIG-IP AAM cached objects.	BIG-IP AAM will not accelerate HTTP traffic.	/var/log/datastor
dedup_admin	Responsible for deduplication operations.	The deduplication feature will not function.	/var/log/dedup_admin
mysqld	The MySQL database stores BIG-IP AAM performance report data. Note: This daemon may be shared by other BIG-IP services.	Performance data will not be logged. BIG-IP AAM will continue to process traffic.	/var/lib/mysql/mysqld.err
wccpd	Web Cache Communication Protocol (WCCP) process in BIG-IP AAM. The wccpd can be stopped if the WCCP feature is not in use. If wccpd is disabled, the WCCP feature will not function.	The WCCP feature will not function.	/var/log/wccpd.log
wocd	Manages remote iSession endpoints.	BIG-IP AAM will not accelerate WAN traffic.	/var/log/wocd
wocplugin	Manages and optimizes CIFS connections.	BIG-IP AAM will continue to accelerate traffic, but will not optimize CIFS connections.	/var/log/wocplugin

Starting and stopping BIG-IP WebAccelerator processes

You can use the command line to manage the BIG-IP WebAccelerator processes on the BIG-IP system. To stop, start, or restart all BIG-IP WebAccelerator processes, use the following syntax with the bigstart command:

bigstart

In this syntax, note the following:

refers to the action for bigstart, such as stop, start, or restart.
is the name of the BIG-IP WebAccelerator process.

Note: For information about using the bigstart utility, refer to the bigstart man page or K4080: Adding and removing services included in the bigstart process.

K14462: Overview of BIG-IP AAM daemons (11.x – 15.x)