Coyote Point Systems Equalizer Especificaciones descargar pdf (Pagina 315)

The cluster parameters Direct Server Return, Spoof, and Idle Timeout are directly related to direct server return

connections:

l Direct Server Return - this option enables Direct Server Return. All requests to this cluster IP will be

forwarded to the server with the client IP as the source IP, and the cluster IP as the destination IP. The

loopback interface of the server must be configured with the cluster IP to receive the requests. See

“Configuring Servers for Direct Server Return” on page 183.

l Spoof - this option causes Equalizer to spoof the client IP address when Equalizer routes a request to a

server in a virtual cluster; that is, the IP address of the

client

is sent to the server, not the IP address of the

Equalizer. This flag must be enabled for DSR.

l Idle Timeout - The is the time in seconds before reclaiming idle Layer 4 connection records. Applies to

Layer 4 TCP clusters only. For DSR the Idle timeout slider must be set to a non-zero value, or Equalizer

will never reclaim connection records for connections terminated by the server. The cluster's Idle Timeout

should be set to the longest period within your application that you would like Equalizer to wait for

consecutive messages from the client (since the Equalizer does not see server packets on DSR

connections). For example, if the longest expected server response time and the longest expected delay

between client responses on active connections are both 60 seconds, then set the Idle Timeout slider to

120 seconds.

To create a new cluster or modify an existing one for DSR, do the following:

1. Log into the GUI using a login that has add/del access for the cluster (See "Logging In" on page 192.)

2. Do

one

of the following:

a. Create a new Layer 4 TCP or UDP cluster: right-click Equalizer in the left navigational pane

and select Add Cluster. After you enter and commit the basic information, you’ll be taken to

the server Configuration tab.

b. Modify an existing Layer 4 TCP or UDP cluster: click on the cluster name in the left frame to

display the cluster’s Configuration tab in the right frame.

3. Enable the Direct Server Return and Spoof check boxes.

4. If the cluster is a Layer 4 TCP cluster and the idle timeout parameter is set to 0, increase it as described in

the table above. Skip this step for Layer 4 UDP clusters.

5. Click on Commit to save your changes to the cluster configuration.

6. If you need to add server instances to a server pool, add them by doing the following:

a. Right-click the server pool name in the left navigational pane frame and select Add Server

Pool.

b. Fill in the remainder of the required information.

c. Click on the Commit button to save your entries.

7. Perform the procedure in the following section on each server that you add to the cluster.

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Coyote Point Systems Equalizer Especificaciones Pagina 315