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Chapter 7
Hierarchical Caching
3. Scroll to the Parent Caching section of the Routing page (shown below).
4. Select Parent Caching: On.
5. Click the Make These Changes button.
To enable HTTP parent caching manually:
1. Telnet into the HP web cache appliance and select Shell Access as described in
Overview of Access
Methods‚ on page 7
.
2. Open the
records.config
file located in Traffic Server’s
config
directory with Vi.
3. Edit the following variable:
4. Save and close the
records.config
file.
5. Run the following command to apply the configuration changes.
traffic_line -x
Identifying HTTP parent caches
You must identify the parent to which requests are sent when the Traffic Server cannot find the requested
object in its cache. To use parent failover, you must identify more than one parent cache so that when a parent
cache is unavailable, requests are sent to another parent cache.
You can identify parent caches by using Traffic Manager or by setting proxy rules in the parent configuration
file (
parent.config
). To set parent proxy rules, refer to
parent.config‚ on page 179
.
To identify an HTTP parent cache from Traffic Manager:
1. Access Traffic Manager from your browser (refer to
Accessing Traffic Manager‚ on page 8
).
2. On the Configure tab, click the Routing button.
3. Scroll to the Parent Caching section of the Routing page.
4. Make sure that Parent Caching: On is selected.
5. In the Parent Cache field, enter the host name and host port of the parent cache to which you want missed
requests to be forwarded. Use the following format:
parent_name:port_number
To specify more than one parent cache for parent failover, end each entry in the Parent Cache field with
a semi-colon (;). For example:
Variable
Description
proxy.config.http.parent_proxy_routing_enable
Set this variable to 1 to enable the HTTP parent
caching option.
