Coyote Point Systems Equalizer Especificaciones descargar pdf (Pagina 254)

Servers

Setting initial Weights for Mixed Clusters

Equalizer enables you to build heterogeneous clusters using servers of widely varying capabilities. Adjust for the

differences by assigning initial weights that correspond to the relative capabilities of the available servers. This

enables you to get the most out of existing hardware, so you can use an older server side-by-side with a new one.

After you assign relative initial weights, monitor cluster performance for two to three hours under load. You will

probably fine-tune the weights and optimize performance of your cluster two or three times.

Continue monitoring the performance of your cluster and servers and watch for any trends. For example, if you

notice that Equalizer

always

adjusts the dynamic weights so that the weight of one server is far below 100 and the

weight of another is far above 100, the server whose dynamic weight is consistently being reduced might have a

problem.

Setting Maximum Connections per Server

By default, the max connections server option is set to 0, which means that Equalizer will route traffic to the server

whenever the server is selected by the current load balancing settings. If max connections is set to a value greater

than 0, then Equalizer limits the total number of simultaneously open connections to the server to that value. This

restriction applies regardless of the persistence options set on the cluster.

The max connections option can be set in Layer 4 TCP, Layer 7 HTTP, and Layer 7 HTTPS clusters. When a

server reaches the specified limit, requests will not be routed to that server until the number of active connections

falls below the limit.Typical reasons to set a maximum number of connections include:

l implementing a connection limit that is required due to software limitations, such as an application that can

service a limited number of concurrent requests

l implementing license restrictions that are not enforced by software; such as limiting the number of active

connections to an application that is licensed for a limited number of concurrent connections

l setting a threshold that will limit resource utilization on the server

To set max connections on a server:

1. Log into the GUI using a login that has add/del access for the cluster that contains the server (See "Logging

In" on page 192)

2. Do

one

of the following:

a. Create a new server: right-click a cluster name in the left frame and select Add Server. After

you enter and commit the basic information, you’ll be taken to the server Configuration tab,

where you can set max connections as shown in Step 2.

b. Modify an existing server: click on the server name in the left frame to display the server’s

Configuration tab in the right frame.

c. Set Max Connections to a positive integer between 0 and 65535. A zero (the default) means

that no connection limit is set for this server. (Set other parameters and flags for the server as

desired; see "Cluster Types and How They're Used with Equalizer" on page 260, for more

details.)

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Coyote Point Systems Equalizer Especificaciones Pagina 254