It is possible to pause and resume Vidispine API instances in Vidinet. When an instance has been resumed, the search index will be empty, i.e. the items and collection you saw before the pause are not visible anymore. To restore the contents of the search indexes (items, collections etc), you must perform a reindex:  

PUT /API/reindex/item
PUT /API/reindex/collection
PUT /API/reindex/file
PUT /API/reindex/acl
PUT /API/reindex/thumbnails

Find more information about re-indexing in the API documentation.