My database size is approx 1.5 TB and I have approx 2TB free on backup mount point. But after 10 hours my backup fail due to lack of storage and its just 60% complete. Is their any why through which i can resume my backup from the failure point??
mongodump -u admin -p admin -d tex –host xx.xx.xx.xx –authenticationDatabase admin
Do you have any other option then please also share with me.
Best Answer
If you're using the WiredTiger storage engine, data in the database is compressed (using snappy by default). In contrast,
mongodump
output is not compressed. This is why 2TB may not be enough to backup a 1.5TB database.To determine the uncompressed size of your database, you can run
db.stats().dataSize
in themongo
shell (see manual).To determine the uncompressed collection size, use
db.collection.stats().size
.Having said that, there is no built-in way to "resume" a dump. However, you can pass a query into
mongodump
using--query
parameter. If you have some kind of timestamp/ordering field in your collection, you may be able to use this parameter. This could also help you to split up your backup so you don't have to do all 1.5TB at once.Alternatively, you also can pass
--gzip
intomongodump
as suggested by JJussi to ensure the output is compressed.