Index compression does not appear to function, however it is correctly configured under nvconfigurator > Media Manager >
"Days of inactivity before an index is compressed (0 = never)“ = 7
“Hours between scans for indexes to be compressed (0 = never)” = 6
Daily MediaDatabase growth is observed with no space being reclaimed.
"grep -i compress messages | wc -l" doesn't return any number of compressed indexes for the period covered in the messages file, showing compression is not running.
Examining the index files under netvault/db/MediaDatabase/Files/Backup/0000/00, shows that some have consequent sizes thus do not appear to be compressed.
When an index is compressed, running the ‘head’ command on the file should show the following string: "NetVault - Compressed Index" at the beginning of the file. However a large number of files older than the set number of days of inactivity before compression are not showing the string.
Finally, another symptom that could point to an index compression issue is a sudden and noticeable MediaDatabase decrease in size, implying index compression had stopped working for some time and suddenly restarted compressing all the indexes it had missed before.
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