How to build mongodb Architecture Replica Set&Sharding-ttlsa
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Build mongodb architecture Replica Set&Sharding-ttlsa in one minute
In the test phase, we need to have a simulated test environment to test whether the functions of all aspects of the application and system architecture meet the requirements. In my company, I often use the following methods to build mongodb replication sets and sharding architectures for developers to test. I also often use this method to simulate online architecture and test related content.
Open a MongoDB shell without connecting any mongod
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> replicaSet = ReplSetTest ({:})
Start three mongod instances
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Et.startSet ()
ReplSetTest n: ReplSetTest n: ports: [,] number
"useHostName" true "oplogSize" 40 "keyFile" undefined "port" 31000 "noprealloc" smallfiles "rest" replSet "" testReplSet "" dbpath "," $set-$node "" restart "undefined" pathOpts "" node "0" set "" testReplSet "
}
Resetting db path ReplSetTest n: ReplSetTest n: ports: [,] number
"useHostName" true "oplogSize" 40 "keyFile" undefined "port" 31001 "noprealloc" smallfiles "rest" replSet "" testReplSet "" dbpath "," $set-$node "" restart "undefined" pathOpts "" node "1" set "" testReplSet "
}
Resetting db path ReplSetTest n: ReplSetTest n: ports: [,] number
"useHostName" true "oplogSize" 40 "keyFile" undefined "port" 31002 "noprealloc" smallfiles "rest" replSet "" testReplSet "" dbpath "," $set-$node "" restart "undefined" pathOpts "" node "2" set "" testReplSet "
}
Resetting db path > replicaSet.initiate ()
"replSetInitiate"_ id"testReplSet"members" {
:
:}
"_ id" 1 "host"nd0302012029:31001"
{
:
:}
}
#. / mongo-nodb
New "localhost:31000" > primaryDB = conn1.getDB () test
{
:
:
:
: [
]
:
:
:
:
: ISODate ()
:}
Insert 1000 documents
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For01000 > primaryDB.coll.count ()
> conn2 = Mongo ()
31001
"test" test
/ / secondary is not readable or writable by default
"$err"not master and slaveOk=false"code" 13435 > secondaryDB.coll.insert ({:})
"getLastError" 1 {
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:
:
Timestamp (,)
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:}
You can see that secondary does not receive client write operations
Test the automatic failover functionality of the replication set:
Shutdown 31000 instance
Check which instance becomes primary
It can be seen that 31002 instances become the new master
Close replica set
For simple building methods of sharding, see: http://www.ttlsa.com/html/1787.html
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