mongorestore

问题 On my first server I get: root@prod ~ # du -hs /var/lib/mongodb/ 909G /var/lib/mongodb/ After migration this database with mongodump/mongorestore On my second server I get: root@prod ~ # du -hs /var/lib/mongodb/ 30G /var/lib/mongodb/ After I waited a few hours, mongo finished indexing I got: root@prod ~ # du -hs /var/lib/mongodb/ 54G /var/lib/mongodb/ I tested database and there's no corrupted or missed data. Why there's so big difference in size before and after migration? 回答1: MongoDB does

问题 I have a script which dumps a mongodb mongodump --archive=$MONGODB_PATH --host $MONGODB_HOST --port $MONGODB_PORT --username $MONGODB_USER --password $MONGODB_PASS --db $MONGODB_NAME but when I try to restore it with mongorestore -d db_name backup/dump it fails with: Failed: dump_name: error restoring from backup/dump/dump_name: reading bson input: invalid BSONSize: -2120621459 bytes I tried --batchSize=100 but it didn't solve the issue for me. What's going wrong here? Solution was:

问题 I just did this myself (as a RockMongo export and import was corrupted) so just posting here. Note this was for MongoDB verison 2.4.9 with corresponding versions of mongodump and mongorestore . 回答1: Read the documentation relevant to your versions first, backup, make sure the solution below is relevant to your scenario etc. http://docs.mongodb.org/v2.4/reference/program/mongodump/ http://docs.mongodb.org/v2.4/reference/program/mongorestore/ BEGIN 20/11/18 update I just had to revisit these

问题 In MongoDB, is it possible to dump a database and restore the content to a different database? For example like this: mongodump --db db1 --out dumpdir mongorestore --db db2 --dir dumpdir But it doesn't work. Here's the error message: building a list of collections to restore from dumpdir dir don't know what to do with subdirectory "dumpdir/db1", skipping... done 回答1: You need to actually point at the "database name" container directory "within" the output directory from the previous dump:

问题 I'm trying to restore a mongodump to a differently named database (which should be possible via --db <dbname> switch). My working directory contains a single dump folder, which contains a single db dump. However, when I try this command: mongorestore --port xxxxx --db some_destination_db I get the following error: ERROR: ERROR: root directory must be a dump of a single database ERROR: when specifying a db name with --db I have no idea why I'm getting this, and can't find any help on google.

问题 I'm trying to restore a mongodump to a differently named database (which should be possible via --db <dbname> switch). My working directory contains a single dump folder, which contains a single db dump. However, when I try this command: mongorestore --port xxxxx --db some_destination_db I get the following error: ERROR: ERROR: root directory must be a dump of a single database ERROR: when specifying a db name with --db I have no idea why I'm getting this, and can't find any help on google.

问题 I have used mongodump to dump my database of mongodb, it created some bson files under dump/mydb But I don't know how to use them. I tried mongoimport , but seems it can't import bson data. Then how to use these bson files? How to import them to another mongodb? 回答1: You need to use mongorestore , not mongoimport ... which is used for things like importing json, or csv, etc. From the back-up-with-mongodump docs: mongodump reads data from a MongoDB database and creates high fidelity BSON files

问题 Since i dropped my MongoDB database i get this error ]1 Failed: no intent for collection in archive: 回答1: Apparently it's a limitation of mongodump and mongorestore that they won't work if there is a forward-slash in the collection name, because it is a path separator character at the OS level: https://jira.mongodb.org/browse/TOOLS-1163 来源： https://stackoverflow.com/questions/34796469/failed-no-intent-for-collection-in-archive

问题 I have a mongodb production database running on mongo 2.4.8 and I would like to upgrade to 2.6.x. The way we want to do that is first load the data to another server running 2.6.3 using mongorestore . However when running the mongorestore command we get the following error: Cannot restore users with schema version 1 to a system with server version 2.5.4 or greater I cannot find anything related to this issue and do't know what to do. In case it matters, the database itself was not created

问题 Mongodb version 3.2.12. I have two local databases, "base1" and "base2" I want to copy all data (all collections) from base1 over to base2, replacing everything there (like when dumping production to a dev environment). Any pipe command (or other simple way) to do this? I tried mongodump --archive --db base1 | mongorestore --db base2 --archive lists a lot of "writing base1.collectionname to archive on stdout", but nothing gets written to base2. I also tried mongodump --db base1 --gzip -