Coyote Point Systems Equalizer Spezifikationen PDF herunterladen (Seite 524)

Using Envoy

GeoCluster (for example, www.coyotepoint.com). The FQDN must

include all name components up to the top level (com, net, org, etc). Do not

include the trailing period.

Policy

Three basic metrics are used by the policy to load balance requests among sites:

the current load on the site, the initial weight setting of the site, and ICMP

triangulation responses. The policy setting tells Envoy the realtive weight to

assign to each metric when choosing a site:

round robin causes Envoy to send requests to each available site, in turn, in

the order they are listed in the configuration. This is equivalent to traditional

‘round-robin DNS’ load balancing.

round trip weights the ICMP triangulation information received from each site

more heavily than other criteria.

adaptive give roughly equal weights to the site load and ICMP triangulation

responses, and gives less weight to the initial weight for the site. This is the

default setting.

site load weights the current load at each site more heavily than other criteria.

site weight weights the user-defined initial weight for each site more heavily

than other criteria.

Note - For all policies, the current site load metric is ignored for the first 10

minutes that the site is up, so that the metric value is a meaningful measure of

the site load before it is used.

Mail Exchanger FQDN

The fully qualified domain name (e.g., "mail.example.com") to be returned if

Equalizer receives a “mail exchanger” request for this GeoCluster. The mail

exchanger is the host responsible for handling email sent to users in the

domain. This field is not required.

Responsiveness

This value controls how aggressively Equalizer adjusts the site’s dynamic

weights. Equalizer provides five response settings: slowest, slow, medium,

fast, and fastest. Faster settings enable Equalizer to adjust its load balancing

criteria more frequently and permit a greater variance in the relative weights

assigned to sites. Slower settings cause site measurements to be averaged over

a longer period of time before Equalizer applies them to the cluster-wide load

balancing; slower settings also tend to ignore spikes in cluster measurements

caused by intermittent network glitches. Use the slider to make your selection.

We recommend that you select the medium setting as a starting point.

Time To Live

The cache time-to-live, which is the length of time (in seconds) that the client’s

DNS server should cache the resolved IP address. Longer times will result in

increased failover times in the event of a site failure, but are more efficient in

terms of network Resources. Use the slider to make your selection. The default is

120 (that is, 2 minutes).

Multi Response Number

- this is the maximum number of Resource records returned in a DNS response

that will be allowed in this GeoCluster. The first address will be the actual

524

1 2 ... 519 520 521 522 523 524 525 526 527 528 529 ... 593 594

Kommentare zu diesen Handbüchern

Keine Kommentare

Coyote Point Systems Equalizer Spezifikationen Seite 524

Kommentare zu diesen Handbüchern

Verwandte Produkte und Handbücher für Audio-Equalizer Coyote Point Systems Equalizer