How to COPY or CLONE MongoDB Databases

How to COPY or CLONE MongoDB Databases

db.copyDatabase  :- > The "db.copyDatabase" method is used to copy a database either from one mongod instance to the current mongod instance or within the same mongod instance. 

Syntax:

db.copyDatabase(fromdb, todb, fromhost, username, password, mechanism)

Options:

fromdb : - > Name of the source database.
todb : -> Name of the target database.
fromhost : -> The hostname of the source mongod instance. Omit to copy databases within the same mongod instance.
username : -> The name of the user on the fromhost MongoDB instance. The user authenticates to the fromdb.



1. Here are databases . 

> show dbs;
admin      0.000GB
config     0.000GB
dev_XXX   0.000GB
local      0.000GB
prod_XXX  0.000GB
testing    0.000GB
>
>

2. Coping Database testing to testing-copy.

> db.copyDatabase("testing","testing-copy");
WARNING: db.copyDatabase is deprecated. See http://dochub.mongodb.org/core/copydb-clone-deprecation
{
        "note" : "Support for the copydb command has been deprecated. See http://dochub.mongodb.org/core/copydb-clone-deprecation",
        "ok" : 1
}
>

3. Check copied Database.

>  show dbs;
admin         0.000GB
config        0.000GB
dev_XXX      0.000GB
local         0.000GB
prod_XXX     0.000GB
testing       0.000GB
testing-copy  0.000GB
>

4. Check the collections within the newly copied database :

> use testing-copy;
switched to db testing-copy
> show collections;
users
>