HP StorageWorks Enterprise File Services WAN Accelerator - Manual (Page 29)

HP S TORAGE W ORKS EFS WAN A CCELERATOR M ANAGEMENT C ONSOLE U SER G UIDE 29
2 C
ONF
IGUR
ING
TH
E
HP
EF
S
W
AN A
CC
EL
E
R
A
T
O
R
4. Click Save to write your settings to memory or click Reset to return the settings to
their previous values.
Configuring
CIFS Protocol
Support
You configure CIFS protocol support in the Optimization Service - Protocol: CIFS
page.
You configure CIFS support only if you plan to optimize CIFS traffic.
Advanced Options cont. Neural Framing. Optionally, if you have selected an Auto-Discovery or Fixed Target
rule, 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 it up 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. If you modify settings in this group, click Update to apply your modification.
Remove Selected Rules. To remove a rule, click the check box next to the entry and
click Remove Selected Rules.
Control Description