Expert: represents a single commit into an index as seen by the {@link IndexDeletionPolicy}.
Changes to the content of an index are made visible only after the writer who made that change had written to the directory a new segments file (segments_N). This point in time, when the action of writing of a new segments file to the directory is completed, is therefore an index commit point.
Each index commit point has a unique segments file associated with it. The segments file associated with a later index commit point would have a larger N.
| |