cheap replica

Tags: MongoDB replica setFirst, the environmentcentos6.5node1:172.30.31.114node2:172.30.31.115node3:172.30.31.108NODE4:172.30.31.109 arbitration PointSecond, installationFour nodes are required to perform a1. Install the Package#yum install-y MongoDB Mongodb-server#echo "This is key file" >/home/keyfile#chown Mongodb/home/keyfile#chmod 600/home/keyfile#vim/etc/mongodb.confPort = 27017Fork = TruePidfilepath =/var/run/mongodb/mongodb.pidLogPath =/var/lo

you add a shard copy set. Each shard is assigned a different replset and then initialized. It would be nice to think of a replica set as a single node, but you must specify master when adding shards.4: Start a MONGOs instance link to configure the MongoDB database-- configdb "Sharingmxq"/localhost:27017,localhost:27018,localhost:27019--port=30000 Then add the Shard node: UseAdmin MONGOs>Sh.addshard ('localhost:37017'{"shardadded": "shard0000", "OK":

Written in front: MongoDB is a nosql non-relational database, a more popular product. In the data persistence and the association with the relational database is also done better, at present, the major companies in the storage of binary files (pictures, video, etc.) are widely used. It is also relatively simple to follow the Key-value data schema and object-oriented JSON statement usage. After that, I will share with you some of the experiences I have used in the learning and production applicat

1: The principle of data synchronization:When the primary node completes the data operation, secondary will make a series of actions to ensure the synchronization of the data: 1: Check your local library's oplog.rs collection to find the most recent timestamp. 2: Check the primary node local library Oplog.rs collection to find records larger than this timestamp. 3: Insert the found records into your own oplog.rs collection and perform these operations.　　2: View the information for the

when configuring an AlwaysOn availability group, you encounter the following error, where Server 86 is the replica database server. To resolve this problem, simply change the SQL service's running account to the administrator and open the 5022 port in the firewall (the port number can be found on the properties page in the availability group).SQL Server2012 AlwaysOn Connection to the primary replica that ca

Tags: MongoDB replica set intoBefore learning the concept of replication, the first part of the previous chapter is a little unfinished content to do a simple introduction, mainly automatic failover, asynchronous replication, and additional functions, these are only a brief introduction, in the relevant chapters will be specialized in-depth study.1. Automatic fault transferWhen the primary service and other members of the schema interrupt communicatio

MongoDB replica Set Primary-Secondary switchover Experiment 1. Create a directory for the replica Section [Root @ bakdbserver ~] # Mkdir-p/var/lib/mongo/dbs/node1 [Root @ bakdbserver ~] # Mkdir-p/var/lib/mongo/dbs/node2 [Root @ bakdbserver ~] # Mkdir-p/var/lib/mongo/dbs/node3 2. Start the replica set Node 1: [Root @ bakdbserver ~] # Mongod -- dbpath/var/lib/mongo

MongoDB deployment experiment series of articles, MongoDB as a NoSQL Database, has continued to heat up in recent years, more and more enterprises are trying to replace the original Database with MongoDB MongoDB deployment experiment series of articles, MongoDB as a NoSQL Database, has continued to heat up in recent years, more and more enterprises are trying to replace the original Database with MongoDB MongoDB has been widely used as a NoSQL Database in recent years. More and more enterpr

I. Collection1. A logical index consisting of multiple cores is called a collection. A collection is essentially an index that can span multiple cores, with redundant indexes. 2.collection consists of different shard, each shard multiple replica, each shard has a leadereplica, each replica is a physical index, so a replica corresponds to a core two. The differenc

First, the principle of work 1. The MongoDB 2.6 version starts with the recommended replica set, which is no longer recommended for master-slave replication. 2. The replica set requires at least 3, can be 3 copies of all the replica set, you can also let one of them do the quorum. 3. Only 1 hosts in the replica set can

Tags: manual pos Blog Different Understanding MongoDB technology share AST PrimaryObjectivePersonal understanding, a primary function of a replica set is when the master library fails, and one of the salve from the library is elected to become the new master. The frame diagram is as follows:Among them, the electors do not participate in the data storage, its role is only to elect a new master. When the original master is restored, he will only be adde

Complete example of building a MongoDB cluster (replica set + Shard) ...Prepare four machines, namely BLUEJOE1,BLUEJOE2,BLUEJOE3, and BLUEJOE0The replica set and Shard policy are determined as follows: 3 replica sets will be created, named Shard1,shard2,shard3; The above 3 replica sets as 3 shards; Eac

Label: As I said earlier, the MongoDB database supports data replication between servers. Support for replication between master-slave mode and server. The goal of course is to achieve load balancing and failure recovery. There are two techniques built into the MONGO: master-slave copy, replica set. The configuration of these two modes is briefly described below. First, master-slave replication Master-slave replication is a simple database synchrono

Tags: opera copy asynchronous admin Leo Download index case ptimeIntroducedReplication set (Replica sets) is a master/slave replication mechanism for asynchronous synchronization of the same data, so that multiple machines have more than one copy of the same data, due to the automatic failover and recovery features, When the main library is down and no user intervention is required to automatically switch to the master library on other backup servers,

MongoDB replica set (2) Construction Preparations Environment: CentOS6.5 64-bit MongoDB 3.0.1 64-bit 1. Start the mongod Service [Root @ localhost data] #/usr/local/mongodb3.0.1/bin/mongod -- port 40144 -- dbpath =/data/mongodb3.0.1/data/-- logpath =/data/mongodb3.0.1/log/ mongodb. log -- directoryperdb -- maxConns 100 -- logappend -- replSet repl/192.168.66.89: 50144 -- fork [Root @ localhost data] #/usr/local/mongodb3.0.1/bin/mongod -- port 50144

to allow inbound traffic.650) this.width=650; "src=" http://s3.51cto.com/wyfs02/M01/72/72/wKioL1XkC1azrwU3AALwEtY_G5U495.jpg "style=" float: none; "title=" 4.png "alt=" Wkiol1xkc1azrwu3aalwety_g5u495.jpg "/>650) this.width=650; "src=" http://s3.51cto.com/wyfs02/M01/72/75/wKiom1XkCTiBZb_IAADtEzzTnl4721.jpg "style=" float: none; "title=" 5.png "alt=" Wkiom1xkctibzb_iaadtezztnl4721.jpg "/>4. Open Windows Firewall, select "Allow apps to communicate through Windows Firewall", locate "hyper-V

Tags: LAN als center head-name mod down Comm mac1. Basic information as follows server address 192.168.73.129 replica set name RS container node and port mapping M0 37017:27017 M1 47017:27017 m2 57,017:27,017 Note: Machine Environment installation doc Ker2. Deployment Step 2.1 Download MONGO imageDocker pull Mongo2.2 Starting three nodes Docker run--name m0-p 37017:27017-d MONGO--replset "RS" Docker run--name m1-p 47017:27017-d MONGO--

The company has Windows and Linux servers, both of which have a MongoDB replica set and are monitored in the Zabbix platform. Linux systems can be implemented directly using shell scripts, but the Windows system is not very well implemented, and I use Python here. The following script also applies to Linux systems (both Windows Server 2012 and Centos7.3 systems are validated successfully)Ideas:1, installation Python2.72, using Python's Pymongo module

MongoDB replica Set Maintenance main work:1. View replica set status (cluster status, synchronization delay, single library run status Mongostate)2, delete nodes, stop node shutdownMongoDB replica set cluster synchronization mechanism The purpose of data replication is to maximize the availability of data, redundancy, and avoid single points of failure.

Label:Regardless of whether MongoDB exists as a single node or as a replica set, it is transparent to the application. By default, MongoDB read requests are performed on the primary node and remain consistent with the last write operation. The user can configure the replication set read option for each connection to send its read request to the slave node. This situation is generally related to the eventual consistency of the data, although the data s