Hi, I'm watching my index directory while indexing million documents. While my indexer runs, I see a number of files with extensions like tip, doc, tim, fdx, fdt, etc being created. The total number of these files goes up and down during the run -- from as high as 1500 in the middle of the run to 290 when the indexer completes. Finally, I see that an additional file segments_1 being created.
My questions: 1. What exactly is a segment? 2. In my case, does it mean that I just have 1 segment since I have just one segments_1 file? Or, 3. Is it the case that files of the same type (extension) get merged together into bigger files? For example, many fdt files being merged into one or bigger fdt files? 4. maxMergeAtOnce specifies the # of many segments at once to merge. In my case, what does this mean? If I set it to 10, for example, does it mean that once the # of files for a specific file type (e.g. fdt) reaches 10, it is combined into a single fdt file? Thanks in advance!
