ACK_WINDOW - UDM Manager configuration option
Description
The ACK_WINDOW option specifies the amount of data transferred in Network Fault Tolerant (NFT) mode before waiting for a data acknowledgement message from the receiver.
ACK_WINDOW provides the ability to tune NFT data transfers. The NFT protocol can reduce data transfer rates when it waits for an acknowledgement message. The impact is greater on high latency transmission links. Increasing the ACK_WINDOW size will result in more data transferred before UDM waits for an acknowledgement message.
Usage
Method | Syntax | IBM i | UNIX | Windows | z/OS |
Command Line, Short Form | n/a | ||||
Command Line, Long Form | -ack_window size [ unit ] |
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Environment Variable | UDMACKWINDOW=size [ unit ] |
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Configuration File Keyword | ack_window size [ unit ] |
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STRUDM Parameter | n/a |
Values
The size value specifies the size of the acknowledgement window.
The size value is specified in units of unit. Possible unit values are
Unit | Description |
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B | Bytes (the default) |
K | Kilobytes (1024 bytes) |
M | Megabytes (1048576 bytes) |
The unit value is case insensitive.
The maximum supported size is 500M. The default is 0B indicating each data message is acknowledged.