Enhanced Features › Documentation › COMPNEG

COMPNEG

COMPNEG specifies whether the compression negotiation is allowed, and if so, which compression algorithm the negotiation process substitutes.

compression-method

Specifies the data compression method which the negotiation process substitutes. The possible values for this parameter are:

COMPACT

COMPACTL

YES

RLE

HUFFMAN

LZLARGE

LZMEDIUM

LZSMALL

LZRW3

ZLIB

ZLIB1 – ZLIB9

NO

Specifies that the data compression method is not negotiated. This causes transfers requesting an unsupported or disallowed compression method to be failed.

Default: YES

Notes:

• If a transfer’s compression method that the initiator or partner requests by both participants is known and allowed, that method is used to compress the transfer data.
• If the suggested compression method is not known or is not permitted by a participant involved in the transfer, the compression method that is specified for the COMPNEG parameter can be used to attempt to negotiate to an alternate compression method which is acceptable to both partners of the transfer.
• The compression method that is specified for COMPNEG must be on the list of allowed algorithms for the local server, as an example, the COMPRESS_ALLOWED parameter.

Allow for Control of which Transfer Types are Processed

CA XCOM Data Transport now supports a new parameter and command that can be used to control which types of transfers a server processes. This feature enables an operator to help balance the load on CA XCOM Data Transport servers.

The parameter which controls which transfer types the server can process is TRANSFERS_ALLOWED. This parameter is used to enable or disable processing of locally or remotely initiated transfers. The value of the parameter can also be modified at any time by issuing the DFLT,TRANSFERS_ALLOWED command on the CA XCOM Data Transport server.

TRANSFERS_ALLOWED

TRANSFERS_ALLOWED specifies which types of transfers the CA XCOM Data Transport server is allowed to process.

ALL

All transfer types are allowed to be processed.

LOCAL

The server only processes locally initiated transfer requests.

REMOTE

The server only processes remotely initiated transfer requests.

NONE

The server cannot process any transfer requests.

Default: ALL

Notes:

• The server processes all meta transfers, commands, inquiries, and history requests, regardless of the value selected.
• Transfers that are not processed remain on the queue in an inactive or remote suspended state. The transfers are subject to retries based on the server configuration.
• If the server participates in a PLEXQ or XCOMPLEX environment, a high ranking is applied to the server when locally initiated transfers are disabled. This prevents transfers that are submitted to the PLEXQ or XCOMPLEX from being rejected in the event the server is selected to process the request.