mongoexport:将数据导出成JSON格式,与标准的JSON有些不同
参数说明:
- [root@localhost mongodb]# ./bin/mongoexport --help
- Export MongoDB data to CSV, TSV or JSON files.
- options:
- --help produce help message
- -v [ --verbose ] be more verbose (include multiple times for more
- verbosity e.g. -vvvvv)
- --version print the program's version and exit
- -h [ --host ] arg mongo host to connect to ( <set name>/s1,s2 for
- sets)
- --port arg server port. Can also use --host hostname:port
- --ipv6 enable IPv6 support (disabled by default)
- -u [ --username ] arg username
- -p [ --password ] arg password
- --dbpath arg directly access mongod database files in the given
- path, instead of connecting to a mongod server -
- needs to lock the data directory, so cannot be used
- if a mongod is currently accessing the same path
- --directoryperdb if dbpath specified, each db is in a separate
- directory
- --journal enable journaling
- -d [ --db ] arg database to use
- -c [ --collection ] arg collection to use (some commands)
- -f [ --fields ] arg comma separated list of field names e.g. -f
- name,age
- --fieldFile arg file with fields names - 1 per line
- -q [ --query ] arg query filter, as a JSON string
- --csv export to csv instead of json
- -o [ --out ] arg output file; if not specified, stdout is used
- --jsonArray output to a json array rather than one object per
- line
- -k [ --slaveOk ] arg (=1) use secondaries for export if available, default
- true
常用: mongoexport -d testdb -c testcol -o out.dat
mongoimport:从JSON导入,由于与标准的JSON略有些不同,如果出现错误,可以先导出看看mongo的格式要求,再导入
- [root@localhost mongodb]# ./bin/mongoimport --help
- options:
- --help produce help message
- -v [ --verbose ] be more verbose (include multiple times for more
- verbosity e.g. -vvvvv)
- --version print the program's version and exit
- -h [ --host ] arg mongo host to connect to ( <set name>/s1,s2 for sets)
- --port arg server port. Can also use --host hostname:port
- --ipv6 enable IPv6 support (disabled by default)
- -u [ --username ] arg username
- -p [ --password ] arg password
- --dbpath arg directly access mongod database files in the given
- path, instead of connecting to a mongod server -
- needs to lock the data directory, so cannot be used
- if a mongod is currently accessing the same path
- --directoryperdb if dbpath specified, each db is in a separate
- directory
- --journal enable journaling
- -d [ --db ] arg database to use
- -c [ --collection ] arg collection to use (some commands)
- -f [ --fields ] arg comma separated list of field names e.g. -f name,age
- --fieldFile arg file with fields names - 1 per line
- --ignoreBlanks if given, empty fields in csv and tsv will be ignored
- --type arg type of file to import. default: json (json,csv,tsv)
- --file arg file to import from; if not specified stdin is used
- --drop drop collection first
- --headerline CSV,TSV only - use first line as headers
- --upsert insert or update objects that already exist
- --upsertFields arg comma-separated fields for the query part of the
- upsert. You should make sure this is indexed
- --stopOnError stop importing at first error rather than continuing
- --jsonArray load a json array, not one item per line. Currently
- limited to 4MB.