Web agent relay configuration

Starting with V7.0.4.0, relays can be configured to support web agents exclusively.

In this mode, no JMS connection between relay and server is required and JMS agents will not be able to connect. You must upgrade relays for agents with web communication enabled and associate with the relay from the UI. However, a successful agent communication does not require any configuration. The following web communication parameters are defined in the relayInstallDir/conf/agentrelay.properties file:

agentcomm.enabled=true
agentcomm.server.uri=random:(wss://ucd1.example.org:7919,wss://ucd2.example.org:7919)

Agent relay limits

The maximum number of agents that can be assigned to a relay is limited in each of the releases. See to the following table to check the number of agents that are allowed for a relay for your installedIBM® UrbanCode® Deploy version.


Version	Relay mode	Agent type	Limit with default proxy	Limit with legacy proxy
7.0.4.0 or before	JMS mode	Web Agents	1K	N/A
		JMS Agents	1K	N/A
		Total	1K	N/A
7.0.4.0 to 7.0.5.0	Web mode	Web Agents	1K	N/A
		JMS Agents	0	N/A
		Total	1K	N/A
	JMS mode	Web Agents	1K	N/A
		JMS Agents	1K	N/A
		Total	1K	N/A
7.0.5.0 or later	Web Mode	Web Agents	10K	1K
		JMS Agents	0	0
		Total	10K	1K
	JMS Mode	Web Agents	10K	1K
		JMS Agents	1K	1K
		Total	10K	1K

In Linux, use the following utilities to reach the design limit of 10K concurrent agents:

sysctl:
```
fs.file-max >= 40000
```
ulimit:
```
nofile >= 40000
```

sysctl:

net.ipv4.ip_local_port_range >= "10000 65000"