Coyote Point Systems Equalizer Spezifikationen PDF herunterladen (Seite 590)

Glossary

RST

Refers to the TCP protocol’s reset command, which instructs a device to end a connection.

Secure Sockets Layer (SSL)

A protocol that enables secure communication between two hosts, using data encryption and authentication.

server

A computer or application that controls access to a network and its associated devices and applications. A server

communicates with one or more clients as well as other servers. See authoritative name server, back-end server,

name server, physical server, proxy server, and virtual web server.

server address

The IP address of a server on the internal interface. Multiple IP addresses can be aliased to a single physical

server. See server.

server agent

An agent that provides Equalizer with real-time performance statistics for a specified server. See server.

server agent load balancing

Dispatches the highest percentage of requests to the server with the lowest server agent value. In a similar way

to Fastest Response, Equalizer tries to avoid overloading the server by checking the number of connections and

response time. This method only works if server agents are running on all servers in the cluster.

server agent value

The value returned by the server agent daemon (if any) running on the server.

Server Agents

These are somtimes called Smple Health Checks. Simple health checks resemble ICMP, TCP and ACV server

health checks, but they have a slightly different purpose. Rather than determining if a server is either "up" or

"down", they send a request to a server and the server is expected to reply with a number between -1 and 100

to say exactly how alive it is. In order to give Equalizer a proper answer to the health check query, the server

needs to run a Server Agent.

server cluster

A group of servers that are components in a network and joined through hardware or software. See cluster. See

also FTP cluster, geographic cluster, and virtual cluster. See server.

server draining

The process of allowing existing connections to a server to complete while not allowing any new connections, so

that the server is eventually not serveing any traffic. Usually done in preparation for shutting down, rebooting,

or upgrading a server. On Equalizer, server draining is enabled using the quiesce server option.

server endpoint

An IP address-port pair that identifies a physical or virtual server on the internal network to which Equalizer can

route connection requests. See server.

server response time

The length of time for the server to begin sending reply packets after Equalizer sends a request.

server weight

A value that indicates the relative proportion of connection requests that a particular server will receive. See

dynamic weight, server, initial weight, and weight.

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Coyote Point Systems Equalizer Spezifikationen Seite 590