HP Transcend Traffix Manager manual Aggregating Devices, Default, Aggregation

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AGGREGATING DEVICES

	This appendix describes:
	■	Overview
	■	Default Aggregation
Overview	Aggregation reduces the amount of memory and disk resources required
	by Traffix™ Manager by collating the data collected for many devices into
	a single device. For example, in sites where there is a lot of Internet
	traffic, some or all external devices can be aggregated together. This may
	be the only way to limit the resource usage to an acceptable level. Use
	the Aggregation dialog box to set up aggregation.
	Once a definition has been specified and the Traffix Manager processes
	and Map restarted, this only affects data collected from this point on, and
	not data already collected.
	This makes any data analysis for data which crosses an “aggregation
	change” boundary hard to interpret. In this case, 3Com® recommends
	that you start a new database. See Appendix B, “Database Management
	Using Traffix Control Panel” for more information.
Default	Aggregation provides a solution to the problem of large numbers of
Aggregation	devices on your network, without forcing you to discard any devices. Any
	loss of data prevents you from seeing a true picture of how your network
	is being used. Aggregation works by grouping together related devices
	and replacing them with a single aggregate device.

By default, all devices in the local DNS domain will be kept in detail, and it is only those outside the local domain that can be aggregated. See “Launching the Traffix Manager Client” on page 26 for more information about local domains. You can specify an alternative aggregation policy.