Priority: Major - P3
Affects Version/s: 3.2.10, 3.6.8
Fix Version/s: Backlog
Environment:Using a replicated MongoD environment with one Primary, one Secondary, and one Hidden Secondary.
doing the hotbackup on the hidden node, and its dataPath is increasing, far lager than the primary and Sencondary node
We do the hotbackup on the hidden node, and its dataPath is increasing, far lager than the primary and Sencondary node during hotbackup.
s->open_cursor(s, "backup:", NULL, NULL, &c);
while( (ret = c->next(c)) == 0 && (ret = c->get_key(c, &filename))
copy files to slow disks
these files becomes larger during hotbackup:
index files .
we restart the hidden node when hotbackup ended, journal and files collection files can decrease to the size the primary, but the index files still so large
the process of hotbackup time is very long (sometimes about sevral hours to more than 20 hours) , because size of the data is large and we backup to very slow disks
some instances abort the disk of the datapath: