These parameters are used by the SharePlex Import process.

SP_IMP_ENABLE_AES

This parameter enforces the use of data encryption between the source system and the target on which it is set. It prevents Import from accepting incoming data unless data encryption is enabled in the Export process. It must be enabled if SP_XPT_ENABLE_AES is enabled.

Note: SharePlex uses AES Cipher Block Chaining (CBC mode) for data encryption.

To configure SharePlex for AES encryption, see the SharePlex Administration Guide.

 

Default: 0 (disabled)

Range of valid values: 0 or 1 (enabled)

Takes effect: when Import is restarted

SP_IMP_QUEUE_PAUSE

  • This parameter pauses the writing of data to the post queue when that queue contains the specified number of messages. Post stores queue messages in shared memory until it issues a checkpoint, after which it releases the data from memory.
  • If the post queue runs out of shared memory, the read and write functions will start incurring file IO to free up the memory buffers. By pausing the queue writing, this parameter helps Post maintain its performance by avoiding the need for disk storage and the resultant slowdown in IO.

    When Import is requested to write to a post queue, and the backlog for that queue is equal to or greater than SP_IMP_QUEUE_PAUSE, Import checkpoints with it associated Export and stops writing to any post queue. Import does, however, remain running. A warning is written to the event log and the status of the process in the show statusdb command output is shown as "paused." The status command shows "Paused" instead of "Running."

    Import resumes writing to the post queue(s) if Import is stopped and restarted or Import detects that the backlog is less than or equal to the SP_IMP_QUEUE_RESUME parameter.

    Use the SP_IMP_QUEUE_RESUME parameter to set the number of messages at which Import resumes writing to the post queue.

    To use this feature, both SP_IMP_QUEUE_PAUSE and SP_IMP_QUEUE_RESUME must be greater than zero, and SP_IMP_QUEUE_PAUSE must be greater than SP_IMP_QUEUE_RESUME.

     

    Default: 0 messages (disabled)

    Range of valid values: n thousand messages, where n is any positive integer

    Takes effect: immediately

    SP_IMP_QUEUE_RESUME

    This parameter works in conjunction with SP_IMP_QUEUE_PAUSE. If the number of messages in the post queue is lower or equal to the value set with this parameter, Import resumes writing to the post queue.

    To use this feature, both SP_IMP_QUEUE_PAUSE and SP_IMP_QUEUE_RESUME must be greater than zero, and SP_IMP_QUEUE_PAUSE must be greater than SP_IMP_QUEUE_RESUME.

     

    Default: 0 messages (disabled)

    Range of valid values: n thousand messages, where n is any positive integer

    Takes effect: immediately

    SP_IMP_WCMT_MSGCNT

    This parameter works in conjunction with the SP_IMP_WCMT_TIMEOUT parameter. It defines the number of messages that are processed before the Import process checkpoints. Checkpointing saves the state of the process in case it is needed for failure recovery.

    When Import checkpoints, it triggers the Export process to perform its own checkpoint. If the value for this parameter is reached before the value set for SP_IMP_WCMT_TIMEOUT, it triggers the checkpoint.

    In a WAN environment, you can increase this parameter to as many as 10,000 messages, with the understanding that increasing the message interval between checkpoints can negatively affect SharePlex's fault tolerance. If you are using SharePlex in an environment where the network continually fails, you can decrease this parameter.

     

    Default: 10,000 messages

    Range of valid values: any positive integer

    Takes effect: immediately

     

    SP_IMP_WCMT_TIMEOUT

    This parameter works in conjunction with the SP_IMP_WCMT_MSGCNT parameter. It defines the number of seconds that pass before the Import process checkpoints. Checkpointing saves the state of the process in case it is needed for failure recovery.

    When Import checkpoints, it triggers the Export process to perform its own checkpoint. If the value for this parameter is reached before the value set for SP_IMP_WCMT_MSGCNT, it triggers the checkpoint.

     

    Default: 30 seconds

    Range of valid values: any positive integer

    Takes effect: immediately