Oracle GoldenGate Overview of Trails

Trails are used in Oracle GoldenGate to support the continuous extraction and replication of database changes.
A trail can exist on the source or target system, or on an intermediary system.
Only one primary Extract process writes to a trail.

Processes that read the trail include:

  • Path (MA only)
  • Data Pump Extract (CA only)
  • Replicat

Add a local or remote trail with GGSCI (CA) command:
GGSCI > Add Exttrail | Rmttrail <trail_name>, Extract <group_name>, Megabytes <n>

If you are using a data pump Extract:
* The primary Extract needs a local tail (ExtTrail)
* The data pump Extract needs a remote trail (RmtTrail)

GGSCI > Add Exttrail /u01/ogg/dirdat/aa, Extract Finance, Megabytes 10
GGSCI > Add Rmttrail /u01/ogg/dirdat/bb, Extract parts, Megabytes 10

Start an Extract process with the adminclient (MA) command:
OGG > Start Extract <group_name>
OGG > Info Extract <group_name>

If the output trail is remote, this normally triggers the target Manager process to start a Server Collector process with the default parameters.

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Muhammad Rawish Siddiqui

Master in Computer Science (Database Engineering) and PGD in Management Information System.
45+ Online Certifications, which includes EDRP (EC-Council Disaster Recovery Professional), Data Management, Security+, DBaaS - Cloud Certified Expert, Oracle Cloud Autonomous Database Specialist, Oracle Database Cloud Certified Professional, Oracle Cloud Infrastructure, OCP 7.3, 10g, 11g, 11i, R12, OCE/OCS 11i System Administration, Solaris, Linux and Real Application Cluster 10g, 11g, Oracle Autonomous Database, Real Application Cluster, Oracle Data Guard and Performance Tuning etc. .

Foremost interested areas include, Data Management, Oracle Databases and EBS Health Checks, Real Application Cluster, Disaster Recovery, GoldenGate and Oracle Cloud.
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