Turning on dynamic log file allocation

Help prevent Enterprise Replication (ER) from entering a transaction blocking state, known as DDRBLOCK mode, by configuring ER to add logical log files dynamically.

When a logical log wraps, it overwrites transactions that ER has not yet processed. The transactions are lost before they are stored in the send queue. If a database server is approaching log wrap, ER enters DDRBLOCK mode. ER can be configured to add a logical log file dynamically instead of entering DDRBLOCK mode.

To turn on dynamic log file allocation:

  1. On the menu of the HCL OpenAdmin Tool (OAT) for Informix®, click Replication > Node Details > Configure.
  2. Click Edit Configuration.
  3. For DYNAMIC_LOGS, enter 2 to turn on dynamic log file allocation.
  4. For CDR_MAX_DYNAMIC_LOGS, enter the number of dynamic log file requests that ER can make in a session. Or enter -1 to add logs indefinitely.

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