Fully Serialized Processing

In fully serialized mode, receivers can only retrieve messages after all older messages have been received and committed.

Figure 1–7 Fully Serialized Processing

The figure above shows a sample delivery sequence for serialized processing. In step 1, ReceiverA retrieves its message. ReceiverB might at this point be ready to receive its message, but must wait until ReceiverA has committed its message. After ReceiverA commits the message in step 2, ReceiverB can then retrieve and commit its message (steps 3 and 4).

The following table shows the benefits and drawbacks of protected concurrent processing.

Table 1–3 Tradeoffs for Fully Serialized Processing

Benefits	Drawbacks
Guaranteed delivery by time sequence.	Provides the lowest performance of all FIFO modes.

You specify fully serialized processing for JMS IQ Managers with the Fully Serialized Queues property as described in Special FIFO Mode Properties.