Fine-Tuning File-Level And Vss-Aware Block-Level Transfer Performance - Novell PLATESPIN PORTABILITY SUITE 8.1 Configuration Manual

2.4.1 Fine-Tuning File-Level and VSS-Aware Block-Level
Transfer Performance
You can fine-tune your over-the-network data transfer for optimum performance in your specific
environment. For example, you might need to control the number of your TCP connections or
impose a packet-level compression threshold.
This functionality is supported for migration jobs that use the following data transfer methods:
File-level
Block-level with the Microsoft Volume Shadow Copy Service (VSS) option selected
Fine-tuning is done by modifying the product's
located on your Portability Suite Server host in the following directory:
..\PlateSpin Portability Suite Server\Web
Below is a list of the configuration parameters with two sets of values: the defaults and the values
recommended for optimum operation in a high-latency WAN environment.
Parameters for Fine-Tuning File-Level Data Transfer Performance
Table 2-4
Parameter
fileTransferThreadcount
Controls the number of TCP connections opened for file-
based data transfer.
fileTransferMinCompressionLimit
Specifies the packet-level compression threshold in bytes.
fileTransferCompressionThreadsCount
Controls the number of threads used for packet-level data
compression. Ignored if compression is disabled.
Because the compression is CPU-bound, this setting might
have a performance impact during Live Transfer.
fileTransferSendReceiveBufferSize
TCP/IP window size setting for file transfer connections;
controls the number of bytes sent without TCP
acknowledgement, in bytes.
When the value is set to 0, the default TCP window size is
used (8 KB). For custom sizes, specify the size in bytes.
Use the following formula to determine the proper value:
((LINK_SPEED(Mbps)/8)*DELAY(sec))*1024*1024
For example, for a 100 Mbps link with 10 ms latency, the
proper buffer size would be:
(100/8)*0.01 * 1024 * 1024 = 131072 bytes
productinternal.config
Default Value
2
0
(disabled)
2
0 (8192 bytes) max 5242880 (5 MB)
Configuring Portability Suite and Your Network Environment
configuration file,
For High-Latency WANs
4 to 6 (max)
max 65536 (64 KB)
n/a
21