python - Open edX and split mongo consumes disk space -


i using open edx uses mongodb store courses. running three-node replica set. using split mongo - feature makes copy of current document (backup) before editing. time passes by, piles up, resulting in consumption of large disk space. there around 30 courses , when export it, consumes around 2-3 gb. however, disk space using

i tried clean unwanted courses using this script

upon executing in primary member, takes time , deletes unwanted documents. not release disk space. 

rs0:secondary> db.stats() {         "db" : "edxapp",         "collections" : 5,         "objects" : 277557,         "avgobjsize" : 112645.21484235671,         "datasize" : 31265467896,         "storagesize" : 57843929088,         "numextents" : 0,         "indexes" : 6,         "indexsize" : 6938624,         "ok" : 1 }   root@mongo:~# df filesystem     1k-blocks     used available use% mounted on udev             4082828       12   4082816   1% /dev tmpfs             817564      396    817168   1% /run /dev/xvda1       8115168  1805528   5874364  24% / none                   4        0         4   0% /sys/fs/cgroup none                5120        0      5120   0% /run/lock none             4087804        0   4087804   0% /run/shm none              102400        0    102400   0% /run/user /dev/xvdf       62904320 57542660   5361660  92% /edx /dev/xvdh       72117576    53012  68378164   1% /tmp/repairdb

i tried compact db using 

rs0:secondary> db.runcommand( { compact : 'modulestore.structures', force: 'true' } ) { "ok" : 1 }

it didn't either.

could please let me know how reclaim disk space in such situation? want in prod server fast can.

you need initial sync. 1 secondary @ time , step down primary , initial sync on too.

so, stop secondary , remove files nodes dbpath. start node , let initial sync. repeat nodes.


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