Chapter 1: Replication Agent for UDB
Format of origin queue ID
Each record in the transaction log is identified by an origin
queue ID that consists of 64 hexadecimal characters (32 bytes).
The format of the origin queue ID is determined by the Replication Agent instance,
and it varies according to the primary database type.
Table 1-1 illustrates
the format of the origin queue ID for the Replication Agent for UDB.
Table 1-1: Replication Agent for UDB origin queue
ID
Character
|
Bytes
|
Description
|
|---|
0-3
|
2
|
Database generation ID
|
4-19
|
8
|
Operation sequence number
|
20-35
|
8
|
Transaction ID
|
36-51
|
8
|
First operation sequence number of oldest
active transaction
|
52-55
|
2
|
Operation type
(begin = 0, data/LOB = 1, commit/rollback = 7FFF)
|
56-59
|
2
|
LOB sequence ID
|
60-63
|
2
|
Unused
|
|
Copyright © 2005. Sybase Inc. All rights reserved.
|
|
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