Use ADD EXTTRAIL to create a trail for online processing on the local system and:
Associate it with an Extract group.
Assign a maximum file size.
Syntax
ADD EXTTRAIL trail_name, EXTRACT group_name [, MEGABYTES n] [SEQNO n]
trail_nameThe relative or fully qualified path name of the trail. The trail name can contain only two characters. Oracle GoldenGate appends this name with a nine-digit sequence number whenever a new file is created. For example, a trail named dirdat/tr would have files named dirdat/tr000000001, dirdat/tr000000002, and so forth.
group_nameThe name of the Extract group to which the trail is bound. Only one Extract process can write data to a trail.
MEGABYTES nThe maximum size, in megabytes, of a file in the trail. The default is 500.
SEQNO nSpecifies that the first file in the trail will start with the specified trail sequence number. Do not include any zero padding. For example, to start at sequence 3 of a trail named tr, specify SEQNO 3. The actual file would be named /ggs/dirdat/tr000003. This option can be used during troubleshooting when Replicat needs to be repositioned to a certain trail sequence number. It eliminates the need to alter Replicat to read the required sequence number.