HP StorageWorks Enterprise File Services WAN Accelerator - Manual (Page 30)

30 C ONFIGURING THE HP EFS WAN A CCELERATOR
4. Click Save to save your settings permanently or click Reset to return the settings
to their previous values.
Modifying In-
Path
Descriptions You can modify the description of your in-path rules in the Optimization Service - In-
Path Rules Edit page.
Advanced Options cont. Neural Framing. Optionally, if you have selected Auto-Discovery or Fixed Target, you
can select a neural framing mode for the in-path rule. Neural framing enables the
appliance to select the optimal packet framing boundaries for SDR. Neural framing
creates a set of heuristics to intelligently determine the optimal moment to flush TCP
buffers. The appliance continuously evaluates these heuristics and uses the optimal
heuristic to maximize the amount of buffered data transmitted in each flush, while
minimizing the amount of idle time that the data sits in the buffer. You can specify the
following neural framing settings:
• Never. Never use the Nagle algorithm. All the data is immediately encoded without
waiting for timers to fire or application buffers to fill past a specified threshold. Neural
heuristics are computed in this mode but are not used.
• Always. Always use the Nagle algorithm. All data is passed to the codec which
attempts to coalesce consume calls (if needed) to achieve better fingerprinting. A timer
(6 ms) backs up the codec and causes leftover data to be consumed. Neural heuristics
are computed in this mode but are not used.
• Transmission Control Protocol (TCP) Hints. This is the default setting which is
based on the TCP hints. If data is received from a partial frame packet or a packet with
the TCP PUSH flag set, the encoder encodes the data instead of immediately
coalescing it. Neural heuristics are computed in this mode but are not used.
• Dynamic. Dynamically adjust the Nagle parameters. In this option, the HP EFS WAN
Accelerator software discerns the optimum algorithm for a particular type of traffic and
switches to the best algorithm based on traffic characteristic changes.
For different types of traffic, one algorithm may be better than others. The considerations
include: latency added to the connection, compression, and SDR performance.
To configure neural framing for an FTP data channel, define an in-path rule with the
destination port 20 and set its optimization policy. To configure neural framing for a
MAPI data channel, define an in-path rule with the destination port 7830 and set its
optimization policy.
Additional Options Enable Computation of Neural Heuristics. Optionally, check this box to enable
optimal packet framing boundaries for SDR.
Update. Click Update to apply your settings to the running configuration.
Remove Selected Rules. To remove an entry, click the check box next to the entry and
click Remove Selected Rules.
Control Description