Difference between revisions of "MongoDB"
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| − | + | [[Category:Database management systems]] | |
| − | + | MongoDB (from hu'''mongo'''us) is an open source document-oriented database system developed and supported by [http://www.10gen.com/ 10gen]. It is part of the NoSQL family of database systems. Instead of storing data in tables as is done in a "classical" relational database, MongoDB stores structured data as JSON-like documents with dynamic schemas (MongoDB calls the format BSON), making the integration of data in certain types of applications easier and faster. | |
| − | MongoDB (from | ||
==Installing MongoDB== | ==Installing MongoDB== | ||
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(Optional) Add MongoDB to the list of daemons that start on system startup | (Optional) Add MongoDB to the list of daemons that start on system startup | ||
# systemctl enable mongodb | # systemctl enable mongodb | ||
| − | |||
==Access the database shell== | ==Access the database shell== | ||
To access the Database shell you have type in your terminal | To access the Database shell you have type in your terminal | ||
# mongo | # mongo | ||
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==Troubleshooting== | ==Troubleshooting== | ||
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If still problems are there please check with the repair parameter (/var/lib/mongodb/ is the default --dbpath from Arch Linux) | If still problems are there please check with the repair parameter (/var/lib/mongodb/ is the default --dbpath from Arch Linux) | ||
# mongod --dbpath /var/lib/mongodb/ --repair | # mongod --dbpath /var/lib/mongodb/ --repair | ||
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| + | Sometimes it can happen that you can't start mongodb if the user and group policy wrong. You can check it with ls -al | ||
| + | |||
| + | # cd /var/log/mongod | ||
| + | # sudo chown -R mongodb:mongodb . | ||
| + | # cd /var/lib/mongodb | ||
| + | # sudo chown -R mongodb:mongodb . | ||
Revision as of 02:29, 1 April 2013
MongoDB (from humongous) is an open source document-oriented database system developed and supported by 10gen. It is part of the NoSQL family of database systems. Instead of storing data in tables as is done in a "classical" relational database, MongoDB stores structured data as JSON-like documents with dynamic schemas (MongoDB calls the format BSON), making the integration of data in certain types of applications easier and faster.
Contents
Installing MongoDB
Install mongodb
# pacman -S mongodb
Start MongoDB
# systemctl start mongodb
(Optional) Add MongoDB to the list of daemons that start on system startup
# systemctl enable mongodb
Access the database shell
To access the Database shell you have type in your terminal
# mongo
Troubleshooting
MongoDB won't more to start
Check for the lock file
# ls -lisa /var/lib/mongodb
If the are there stop the mongodb daemon delete the file after it star the daemon again
# rm /var/lib/mongodb/mongod.lock
If still problems are there please check with the repair parameter (/var/lib/mongodb/ is the default --dbpath from Arch Linux)
# mongod --dbpath /var/lib/mongodb/ --repair
Sometimes it can happen that you can't start mongodb if the user and group policy wrong. You can check it with ls -al
# cd /var/log/mongod # sudo chown -R mongodb:mongodb . # cd /var/lib/mongodb # sudo chown -R mongodb:mongodb .