mongodump 3.2.1 positional arguments not allowed - mongodb

trying mongodump with following options and get "positional arguments not allowed"
mongodump --host=hostname --port=27017 --db=db --out=/path --oplog --gzip
tried mongodump -h hostname -d dbname and that works
What does the message
positional arguments not allowed
mean?


You got the syntax wrong in the first one. You need to remove the = sign. See documentation.
mongodump --host hostname --port 27017 --db db --out /path --oplog --gzip


mongodump -d<dbname> -o <backUpPath>
like this:
mongodump -d projectdb -o /Users/zhangzhanqi/Desktop/backup_mongo/aaa


The syntax has been changed to replacement of = with space character in front of the argument names. To clear the point with a descriptive answer, I put two general forms with long argument and short argument names.
Long parameter form:
mongodump --host hostname --port 27017 --db db --out /path --oplog --gzip
Short parameter form:
mongodump -h hostname -p 27017 -d db -o /path --oplog --gzip
You can find more explanation and examples in the following link:
https://docs.mongodb.com/manual/reference/program/mongodump/

Related

Mongorestore in docker failed: Failed: gzip: invalid header

I created a mongo dump with commands (as suggested in this answer)
docker exec -it mongodb bash
mongodump --host $cluster --ssl --username $username --authenticationDatabase admin --db $dbname --gzip --archive > dumpname.gz
Now when I'm trying to restore the dump with
docker exec mongodb bash -c 'mongorestore --gzip --archive=dumpname.gz'
I get
Failed: gzip: invalid header

It seems like there is some bug with using redirection (>). So when I changed the first command to not use it, mongorestore started to work:
mongodump --host $cluster --ssl --username $username --authenticationDatabase admin --db $dbname --gzip --archive=dumpname.gz
Some similar problems could be found here

Restore mongodb dump to different db [duplicate]

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

You need to actually point at the "database name" container directory "within" the output directory from the previous dump:
mongorestore -d db2 dumpdir/db1
And usually just <path> is fine as a positional argument rather than with -dir which would only be needed when "out of position" i.e "in the middle of the arguments list".
p.s. For archive backup file (tested with mongorestore v3.4.10)
mongorestore --gzip --archive=${BACKUP_FILE_GZ} --nsFrom "${DB_NAME}.*" --nsTo "${DB_NAME_RESTORE}.*"

mongodump --db=DB_NAME --out=/path-to-dump
mongorestore --nsFrom "DB_NAME.*" --nsTo "NEW_DB_NAME.*" /path-to-dump

In addition to the answer of Blakes Seven, if your databases use authentication I got this to work using the --uri option, which requires a recent mongo version (>3.4.6):
mongodump --uri="mongodb://$sourceUser:$sourcePwd#$sourceHost/$sourceDb" --gzip --archive | mongorestore --uri="mongodb://$targetUser:$targetPwd#$targetHost/$targetDb" --nsFrom="$sourceDb.*" --nsTo="$targetDb.*" --gzip --archive

Thank you! #Blakes Seven
Adding Docker notes:
container names are interchangeable with container ID's
(assumes authenticated, assumes named container=my_db and new_db)
dump:
docker exec -it my_db bash -c "mongodump --uri mongodb://db:password#localhost:27017/my_db --archive --gzip | cat > /tmp/backup.gz"
copy to workstation:
docker cp my_db:/tmp/backup.gz c:\backups\backup.gz
copy into new container(form backups folder):
docker cp .\backup.gz new_db:/tmp
restore from container tmp folder:
docker exec -it new_db bash -c "mongorestore --uri mongodb://db:password#localhost:27017/new_db --nsFrom 'my_db.*' --nsTo 'new_db.*' --gzip --archive=/tmp/backup.gz"

You can restore DB with another name. The syntax is:
mongorestore --port 27017 -u="username" -p="password"
--nsFrom "dbname.*"
--nsTo "new_dbname.*"
--authenticationDatabase admin /backup_path

Mongodump Error : positional arguments not allowed: [abc]

The below comment throwing this error for mongodump
mongodump --host xx.xxx.xx.xxx -db abc --out home/dataBaseBackup/

You have missed an -. The correct one is given below:
mongodump --host xx.xxx.xx.xxx --db abc --out home/dataBaseBackup/

Mongorestore to a different database

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

You need to actually point at the "database name" container directory "within" the output directory from the previous dump:
mongorestore -d db2 dumpdir/db1
And usually just <path> is fine as a positional argument rather than with -dir which would only be needed when "out of position" i.e "in the middle of the arguments list".
p.s. For archive backup file (tested with mongorestore v3.4.10)
mongorestore --gzip --archive=${BACKUP_FILE_GZ} --nsFrom "${DB_NAME}.*" --nsTo "${DB_NAME_RESTORE}.*"

mongodump --db=DB_NAME --out=/path-to-dump
mongorestore --nsFrom "DB_NAME.*" --nsTo "NEW_DB_NAME.*" /path-to-dump

In addition to the answer of Blakes Seven, if your databases use authentication I got this to work using the --uri option, which requires a recent mongo version (>3.4.6):
mongodump --uri="mongodb://$sourceUser:$sourcePwd#$sourceHost/$sourceDb" --gzip --archive | mongorestore --uri="mongodb://$targetUser:$targetPwd#$targetHost/$targetDb" --nsFrom="$sourceDb.*" --nsTo="$targetDb.*" --gzip --archive

Thank you! #Blakes Seven
Adding Docker notes:
container names are interchangeable with container ID's
(assumes authenticated, assumes named container=my_db and new_db)
dump:
docker exec -it my_db bash -c "mongodump --uri mongodb://db:password#localhost:27017/my_db --archive --gzip | cat > /tmp/backup.gz"
copy to workstation:
docker cp my_db:/tmp/backup.gz c:\backups\backup.gz
copy into new container(form backups folder):
docker cp .\backup.gz new_db:/tmp
restore from container tmp folder:
docker exec -it new_db bash -c "mongorestore --uri mongodb://db:password#localhost:27017/new_db --nsFrom 'my_db.*' --nsTo 'new_db.*' --gzip --archive=/tmp/backup.gz"

You can restore DB with another name. The syntax is:
mongorestore --port 27017 -u="username" -p="password"
--nsFrom "dbname.*"
--nsTo "new_dbname.*"
--authenticationDatabase admin /backup_path

What does "too many positional options" mean when doing a mongoexport?

mongoexport -h db.mysite.com -u myUser -p myPass -c myCollection
But the response I get is:
ERROR: too many positional options
What's that about?

I had this same problem. In my case, I was using mongoexport with the --query option, which expects a JSON document, such as:
mongoexport ... --query {field: 'value'} ...
I needed to surround the document with quotes:
mongoexport ... --query "{field: 'value'}" ...

I had the same problem. Found a group post somewhere which said to remove the space between the '-p' and the password, which worked for me.
Your sample command should be:
mongoexport -h db.mysite.com -u myUser -pmyPass -c myCollection

The same error I have encountered while importing a csv file.
But its just, the fact that the field list which you pass for that csv file import may have blank spaces.
Just clear the blank spaces in field list.
Its the parsing error.

I had the same issue with mongodump. After searching a bit, I found out that using the --out parameter to specify the output directory would solve this issue. The syntax for using the out parameter is
mongoexport --collection collection --out collection.json
Also in case your Mongodb instance isn't running, then you could use the --dbpath to specify the exact path to the files of your instance.
Source: http://docs.mongodb.org/manual/core/import-export/

I had the same issue with the mongoexport utility (using 2.0.2). My fix was to use the FULL parameter name (i.e. not -d, instead use --db).

Sometimes editor will screw it up (such as evernote). I fixed the issue by retyping the command in terminal.

I was also stuck in same situation and found what was causing it.
Make sure you are exporting in CSV format by adding parameter --type csv
Make sure there are no spaces in fields name,
Example: --fields _id, desc is wrong but --fields id,desc,price is good

This also works if you place the -c option first. For me, this order does work:
mongoexport -c collection -h ds111111.mlab.com:11111 -u user -p pass -d mydb
You can also leave the pass out and the server will ask you to enter the pass. This only works if the server supports SASL authentication (mlab does not for example).

for the (Error: Too many arguments)
Dont Use Space Between the Fields
try:
mongoexport --host localhost --db local --collection epfo_input --type=csv --out epfo_input.csv --fields cin,name,search_string,EstablishmentID,EstablishmentName,Address,officeName
Dont_Try:
mongoexport --host localhost --db local --collection epfo_input --type=csv --out epfo_input.csv --fields cin,name,search_string,Establishment ID,Establishment Name,Address,office Name

Had a similar issue
$too many positional arguments
$try 'mongorestore --help' for more information
Simply fix for me was to wrap the path location in quotes " "
This Failed:
mongorestore -h MY.mlab.com:MYPORT -d MYDBNAME -u ADMIN -p PASSWORD C:\Here\There\And\Back\Again
This Worked:
mongorestore -h MY.mlab.com:MYPORT -d MYDBNAME -u ADMIN -p PASSWORD "C:\Here\There\And\Back\Again"

I had the same issue with starting mongod. I used the following command:
./mongod --port 27001 --replSet abc -- dbpath /Users/seanfoley/Downloads/mongodb-osx-x86_64-3.4.3/bin/1 --logpath /Users/seanfoley/Downloads/mongodb-osx-x86_64-3.4.3/log.1 --logappend --oplogSize 5 --smallfiles --fork
The following error message appeared:
Error parsing command line: too many positional options have been specified on the command line
What fixed this issue was removing the single space between the '--' and 'dbpath'

I had the same issue while using the "mongod --dbpath" command. What I was doing looked somewhat like this:
mongod --dbpath c:/Users/HP/Desktop/Mongo_Data
where as the command syntax was supposed to be:
mongod --dbpath=c:/Users/HP/Desktop/Mongo_Data
This worked for me. Apart from this one may take a note of the command function and syntaxes using the mongod --help command.

In my case, I had to write the port separately from the server connection. This worked for me:
mongoexport --host=HOST --port=PORT --db=DB --collection=COLLECTION
--out=OUTPUT.json -u USER -p PASS

Create a json file in the same folder where you have your mongod.exe.
eg: coll.json
and open a command prompt in this folder.
type this below in CMD.
mongoexport --db databasename --collection collectionname --out
coll.json
and you will see like a progress bar very cool exporting all data.