Checkpoints

ActiveSpaces provides the ability to create checkpoints to save the state and data in a data grid at a specific point in time. Checkpoint files can then be used to restore the data grid.

For details about the types of checkpoints, see "Checkpoints Types" in the TIBCO ActiveSpaces^® Concepts guide.

Checkpoints on disk use the hard link feature of the file system to save space when multiple checkpoints refer to the same file on disk. Copying a checkpoint to a different file system causes the files in that checkpoint to occupy their full amount of space on the new file system.

• Creating a Checkpoint
  A checkpoint can be created manually using the ActiveSpaces administration tool tibdg. You can also create periodic checkpoints using ActiveSpaces.
• Listing Checkpoints
  The tibdg administration tool can be used to see a list of the checkpoints that are taken for a data grid.
• Listing Tables in a Checkpoint
  The tibdg administration tool can be used to see a list of the user tables that a checkpoint contains.
• Deleting Checkpoints
  The ActiveSpaces administration tool tibdg provides the checkpoint delete command to delete a checkpoint by its name or to delete any checkpoint by its ID.
• Validating Checkpoints
  There are some scenarios with Disaster Recovery where specifying the grid to use as the primary data grid in a gridset might fail due to checkpoints already taken for the data grid.
• Checkpoint Properties
  You cannot write data into a checkpoint after it has been created, but ActiveSpaces does provide the ability to query or retrieve data contained in a checkpoint.
• Checkpoint Best Practices