Coyote Point Systems Equalizer Specifikace stáhnout pdf (Strana 588)

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Glossary

port

The abstraction used by Internet transport protocols to distinguish among multiple simultaneous connections to

a single destination host.

port grouping

Refers to the configuration of a load balancers with a list of application ports that must be treated as one group.

port number

The number used to identify a service contact port, such as HTTP port 80.

Port-Address Translation (PAT)

PAT is inherent in load balancers and refers to tranlsating the port number in TCP/UDP packets.

primary Equalizer

The primary unit that handles requests. If the primary Equalizer fails, the backup unit replaces it. See also

backup Equalizer and hot backup.

probe

An action that obtains status information about a computer, network, or device. See geographic probe and ping.

probing interval

The target interval between TCP probes of a cluster that has been marked failing in the load balancing daemon’s

internal tables. If the server does not respond to strikeout threshold (see below) additional TCP probes after it is

marked failing, then the server is marked down. These additional probes are at least probe interval seconds

apart. This value is solely a target; the monitoring process adjusts itself based on a number of factors, including

system load. The default value is 20 seconds.

protocol

A set of rules that govern adherence to a set of standards. See protocol stack.

protocol stack

A layer of protocols that process network actions cooperatively and in tandem. See protocol.

proxy server

A utility, which is part of a firewall, that helps the regular tasks of managing data transmittal from a network to

the Internet and from the Internet to the network. See also firewall.

quiesce

Quiesce is a server option that, when enabled, tells Equalizer not to send the server any new traffic, while

existing connections are allowed to complete. Eventually, the server should not be serving any traffic.

Sometimes called ‘server draining’.

RADIUS

Remote Authentication Dial-In User Service; a protocol that authorizes and authenticates a user trying to link to a

network or the Internet.

receive timeout

This is the failover timeout (in ms) for receiving peer data.

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