Renee Sun <renee_...@mcafee.com> wrote: > [core]/index is a folder holding index files.
Agree so far. > But index files in that folder is not just being deleted or added, they are > also being updated. So you say. That contradicts my understanding, as well as the first 10 hits in Google for "lucene segment files immutable". The one file that is updated is "segments.gen", which is tiny and keeps track of which segments makes up the overall index. > on Linux file system, the folder's timestamp will only be updated if the > files in it is being added or deleted, NOT updated. So if I check the index > folder, it will not be accurately reflexing the last time the index files > are updated. Just watch index/segments.gen. That is precise as it tracks when the logical index was last updated, whereas segment files currently being written are with later timestamps but not part of the index yet. - Toke Eskildsen
