Coyote Point Systems Equalizer Especificaciones descargar pdf (Pagina 26)

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101

Introduction

1. Create servers -- use the IP addresses and ports of the real servers behind Equalizer.

2. Create server pools -- set load balancing parameters that will apply to a group of real servers.

3. Associate servers with server pools -- associate real server names with the server pool, creating a

server

instance

, and set options on the server instance.

4. Associate server pools with clusters.

This allows administrators to define real servers once and use them in multiple server pools (and, hence, clusters)

with distinct operating characteristics specific to each server pool. The following table summarizes the attributes

assigned to servers, server pools, and server instances.

Server Settings Server Pool Settings Server Instance Settings

IP address

Port

Protocol

Probes (health checks)

Max Connections

Reuse Connection Timeout

Load Balancing Algorithm

Load Balancing Responsiveness

Active Content Verification (ACV)

TCP Multiplexing

Hot Spare

Persist

Quiesce

Max Connections

Initial Weight

"SSL Unclean Shutdown" behavior is now the default for HTTPS clusters

In EQ/OS 8 and earlier releases, the default behavior for HTTPS clusters when closing a client connection was to

wait for the client to respond before closing the connection. This works for most non-browser environments. Some

browsers, however, would close their connection to the cluster in an "unclean" fashion, such that processes on

Equalizer were left waiting for a client response, potentially impacting cluster performance.

Previously the "SSL Unclean Shutdown" HTTPS cluster option could be enabled to work around this issue. When

enabled, this option caused client connections to be closed without waiting for the client to respond. Enabling this

option meant that no processes on Equalizer would be left waiting for a client response when closing a connection,

generally improving cluster performance.

In Version 10, the "SSL Unclean Shutdown" behavior described above is the default behavior for HTTPS clusters,

and cannot be disabled.

Typographical Conventions

The following typographical conventions appear throughout this guide:

l Text in “double quotes” indicates the introduction of a new term.

Italic

text is used primarily to indicate variables in command lines, and is also used to emphasize concepts

while discussing Equalizer operation.

l Boldface text highlights GUI interface screen elements: labels, buttons, tabs, icons, etc., as well as data

the user must type into a GUI element.

Courier text denotes computer output: messages, commands, file names, directory names, keywords,

and syntax exactly as displayed by the system.

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