Difference between revisions of "MongoDB"
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− | = | + | = 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/ | ||
+ | |||
+ | |||
+ | |||
+ | = Develop = | ||
+ | |||
== rename a field, or paste one field to another collection-wide == | == rename a field, or paste one field to another collection-wide == | ||
+ | |||
Methods are: updateOne, updateMany or update | Methods are: updateOne, updateMany or update | ||
<pre> | <pre> | ||
Line 21: | Line 32: | ||
</pre> | </pre> | ||
+ | == list users == | ||
+ | use admin; | ||
+ | db.getUsers(); | ||
− | = | + | == create user == |
− | + | use admin; | |
+ | <pre> | ||
+ | db.createUser( | ||
+ | { | ||
+ | user: "myTester", | ||
+ | pwd: passwordPrompt(), // or cleartext password | ||
+ | roles: [ { role: "readWrite", db: "test" }, | ||
+ | { role: "read", db: "reporting" } ] | ||
+ | } | ||
+ | ) | ||
+ | </pre> | ||
− | + | == add role to a user == | |
+ | <pre> | ||
− | + | db.grantRolesToUser('<username>', [ | |
− | + | { role: "readWrite", db: "<dbname>" } | |
− | + | ], { w: "majority" , wtimeout: 4000 }) | |
− | + | ||
+ | </pre> | ||
= Performance Tuning = | = Performance Tuning = | ||
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db.getCollection('system.profile').find({}) | db.getCollection('system.profile').find({}) | ||
− | + | == add member to cluster == | |
operaeventrsX:PRIMARY> rs.add("10.138.96.89") | operaeventrsX:PRIMARY> rs.add("10.138.96.89") | ||
operaeventrsX:PRIMARY> rs.conf() | operaeventrsX:PRIMARY> rs.conf() | ||
− | + | == profiling == | |
Profiling. From: https://docs.mongodb.com/manual/reference/method/db.setProfilingLevel/ | Profiling. From: https://docs.mongodb.com/manual/reference/method/db.setProfilingLevel/ | ||
Latest revision as of 02:15, 10 March 2023
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/
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
use admin;
db.createUser( { user: "myTester", pwd: passwordPrompt(), // or cleartext password roles: [ { role: "readWrite", db: "test" }, { role: "read", db: "reporting" } ] } )
add role to a user
db.grantRolesToUser('<username>', [ { role: "readWrite", db: "<dbname>" } ], { w: "majority" , wtimeout: 4000 })
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()