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Server Health Check Probes

GUI Probe Parameter (CLI Probe Parameter) Description

Probe Interval (probe_interval)

A timer specifying the length of time (in seconds) during which a

successful TCP or UDP server probe must occur, or the server is

marked "down".

If one or more successful probes have occurred before thistimer

expires, the server is marked "up" and the timer is reset. If no

successful probes have occurred, the server is marked ‘down" and

the timer is reset.

The Probe Interval actsas a hard limit on the Probe Global

Timeout -- if a probe is in progress when the Probe Interval

expires, then the probe is timed out.

Max Tries Per Interval (probe_maxties)

The maximum number of times per Probe Interval that Equalizer

will attempt to probe a TCP or UDP server. For example, if Max

Tries Per Interval is set to 3 (the default), Equalizer will send at

most 3 probes to the server during any Probe Interval period.

Probe Global Timeout (probe_gto)

The maximum length of time (in seconds) to wait for a TCP or UDP

probe to be sent and a connection established or a response is

received. If the number of seconds specified exceeds the Probe

Interval setting, then the Probe Interval isused as the Probe

Global Timeout.

Probe Connect Timeout (probe_cto)

The maximum length of time (in seconds) to wait for a TCP server

probe connection to be established.

Probe Data Timeout (probe_dto)

The maximum length of time (in seconds) to wait for the first byte of

data to be transmitted over a TCP server probe connection.

ACV Query (acvq)

An optional string that is sent to the server to elicit the ACV

Response. Some applications (notablyJava) need to be queried

before they return a response.

ACV Response (acvr)

A string that must match the ACV probe data received from a

server in order for the server to be marked "up". POSIX style

regular expressionsare supported.

UDP, TCP, and ACV Probe Parameters

Setting UDP, TCP and ACV Probe Parameters in the GUI

1. Click on Server Pools on the left navigational pane and select a configured server pool. The Server Pool >

Configuration > LB Policy screen will be displayed on the left configuration pane.

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