Difference between revisions of "MongoDB"
From Wasya Wiki
Line 12: | Line 12: | ||
sudo apt-get install -y mongodb-org | sudo apt-get install -y mongodb-org | ||
+ | === mongo 5 on rhel === | ||
+ | From: https://docs.mongodb.com/manual/tutorial/install-mongodb-on-red-hat/ | ||
= Develop = | = Develop = |
Revision as of 18:46, 11 March 2022
Contents
Install
From: https://docs.mongodb.com/manual/tutorial/install-mongodb-on-os-x/ From: https://docs.mongodb.org/manual/tutorial/install-mongodb-on-ubuntu/ From: https://docs.mongodb.com/manual/tutorial/install-mongodb-on-red-hat/
This is probably obsolete.
sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv EA312927 echo "deb http://repo.mongodb.org/apt/ubuntu trusty/mongodb-org/3.2 multiverse" | sudo tee /etc/apt/sources.list.d/mongodb-org-3.2.list sudo apt-get update -y sudo apt-get install -y mongodb-org
mongo 5 on rhel
From: https://docs.mongodb.com/manual/tutorial/install-mongodb-on-red-hat/
Develop
rename a field, or paste one field to another collection-wide
Methods are: updateOne, updateMany or update
db.collection.<update method>( {}, [ {"$set": {"name": { "$concat": ["$firstName", " ", "$lastName"]}}} ] )
Count Documents
db.collection.aggregate( [ { $group: { _id: null, count: { $sum: 1 } } } ] )
list users
use admin; db.getUsers();
create user
user admin;
db.createUser( { user: "myTester", pwd: passwordPrompt(), // or cleartext password roles: [ { role: "readWrite", db: "test" }, { role: "read", db: "reporting" } ] } )
Performance Tuning
db.getProfilingStatus() db.getProfilingLevel() db.setProfilingLevel(1, 10) db.getCollection('system.profile').find({})
add member to cluster
operaeventrsX:PRIMARY> rs.add("10.138.96.89") operaeventrsX:PRIMARY> rs.conf()
profiling
Profiling. From: https://docs.mongodb.com/manual/reference/method/db.setProfilingLevel/
The profiler writes all the data it collects to the system.profile collection, a capped collection in the admin database.
db.getProfilingStatus() # db.setProfilingLevel(level, options) db.setProfilingLevel(1, { "slowms": 500 })
db.enableFreeMonitoring()
use creek_development db.setProfilingLevel(1, { "slowms": 500 }) db.getCollection('system.profile').find({}).sort({"ts": -1}).limit( 5 )
db.lineitems.getIndexes()