Coyote Point Systems Equalizer Especificaciones descargar pdf (Pagina 382)

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Server Health Check Probes

2. Display the configuration of HC1:

eqcli > show srvpool MyPool health_check HC1

Health Check Name : HC1

Type : simple

Port : 1510

Stimulus :

Healthy : 0.000000

Loaded : 100.000000

Probe Interval : 15

Max tries per interval : 3

Global Timeout : 5

First state change timeout : 1

Second state change timeout : 2

Weight : 100

3. Configure the Simple Health Check with the parameters in the health check context where parameter_

name and values described in

Simple Health Check Parameters

above.

eqcli > srvpool MyPool health_check HC1 parameter_name value...

Add an instance of the health check (health check instance) to the server a server instance in the server

pool.Health check instances are applied to server instances (and thus the servers) within a server pool to

determine the health and to determine the "best" server to use.

4. Now add a health check instance for HC1 to each server instance (si) in the server pool.

eqcli > srvpool MyPool si sv1 hci HC1

eqcli > srvpool MyPool si sv2 hci HC1

eqcli > srvpool MyPool si sv3 hci HC1

Simple Health Checks and Load Balancing Policies

Simple health checks work with all load balancing policies, except for round robin.Round robin ignores any agent

response for all server instances in a server pool. All other policies use the integer returned by the agent as one

factor in determining the server to which a new request is sent.

Server Agents

A server agent is a custom written application that runs on a server and listens on a specific port (default: 1510).

When a connection request is received on that port, the server agent returns an integer value between -1 and 100

that indicates the relative load on the server (-1 meaning the server should be considered unavailable, 0 meaning

very lightly loaded, and 100 meaning heavily loaded). Server agents can be used with any cluster type, and have

an effect on all load balancing policies except round robin, which ignores server agent return values.

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