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Once a folder is set for indexing, Tonido server will scan the folders and will build an "index" of files based on their meta data. The folders will be rescanned periodically as well to detect changes to the files.
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The status of share is shown in the "Indexed Folder" section.
How often is automatic Indexing performed and can it be changed?
Indexing is done every 12 hours . However, If no change was detected in the filesystem, then no action is done.
You can change this behavior to do indexing only when user chooses to do by selecting the "When to Index" menu and choosing "Manually" option.