Avaya Configuring Data Compression Services Manual de usuario descargar pdf (Pagina 39)

114061 Rev. A 3-1

Chapter 3

Customizing Data Compression

When you enable data compression, default values are in effect for all parameters

(see parameter descriptions in Appendix A). You may want to change these values,

depending on the requirements of your network. The following sections provide

information about Bay Networks compression and decisions you make to use

compression effectively on your network.

Allocating Compression Memory

Using compression on your network involves allocating memory to maximize

compression without unduly taxing the resources of your system. You can select

• A compression mode, to maximize compression ratio

• A history size, to maximize throughput

• A buffer size, to prevent data loss

Maximizing Compression Ratio

You can compress data in one of two modes:

• Continuous Packet Compression (CPC) maintains compression history across

packets. CPC yields a higher compression ratio than does Packet-by-Packet.

In most circumstances, you should select CPC, the default value, to maximize

compression.

• Packet-by-Packet Compression (PPC) creates a new history for each packet.

PPC yields a lower compression ratio than does CPC. Select PPC only for

links that drop a very large number of packets. Be aware that under these

circumstances, implementing data compression may offer marginal or no

advantages.

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Avaya Configuring Data Compression Services Manual de usuario Pagina 39