EpochInterval

For TimesTen TimesTen Scaleout, use this attribute to set the number of seconds between epochs.

If Durability = 1, the default for this attribute is 0. (System does not generate periodic epochs)

If Durability = 0, the default for this attribute is 1. You must set this attribute to a value less than the value of the CkptFrequency when Durability=0 to guarantee at least 1 epoch per interval.

If this attribute is set to 0, the system does not generate periodic epochs. An application can generate epochs at custom intervals by calling the ttEpochCreate built-in procedure each time the application wants to create an epoch.If an element is down, an epoch interval can be skipped.

As long as one element in each replica set is up, the system never skips more than K*EpochInterval seconds between epochs.

Required Privilege

No privilege is required to change the value of this attribute.

Usage in TimesTen Scaleout and TimesTen Classic

This attribute is not supported in TimesTen Classic.

This attribute is supported in TimesTen Scaleout.

Setting

Set EpochInterval as follows:

Where to set the attribute	How the attribute is represented	Setting
C or Java programs or UNIX and Linux systems database definition (.dbdef) file in TimesTen Scaleout	EpochInterval	0 - TimesTen does not generate periodic epochs. n > 0 - An integer that indicates the number of seconds between epoch writes.
Windows ODBC Data Source Administrator	N/A

Also see CreateEpochAtCommit.