cheap replica

Tags: MongoDBMongoDB Replica Set Earlier versions used Master-slave, a master one from and MySQL similar, but slave in this architecture is read-only, when the main library down, from the library can not automatically switch to primary The Master-slave mode has now been phased out, changed to a replica set, this mode has a master (primary), and multiple Slave (secondary), read-only. Support to set

Label:1. Assume that 1 database server is Active server (master server), 2 and 3 is the backup server, when 1 fails, then will be in 2 and 3 to elect one (according to the weight of the rules) as an active server, and when 1 is back to normal, it will be the identity of the backup server to appear;2. Set the value of the database server (in the configuration file to be set to a closed loop):For example, set up a replica cluster of three databases:Data

Tags: test mon nec Switch ONS host BSP GES dataMongoDB version: Environment: one virtual machine Three copies of Configsvr: Port is 27020,27021,27022 Two shards: Shard1:-> three replicas with Port 27010,27011,27012 Shard2:-> three replicas with Port 27013,27014,27015 One route: MONGOs-Port 27023 Pre-conditions: Create a directory of data store files mkdir /usr/local/mongodb/data mkdir /usr/local/mongodb/log /usr/ local/mongodb/data mkdirmkdirmkdirmkdirmkdir S101 mkdirmkdirmkdirmkdir s202 Gener

Copyright notice: This article by the Comte rain original article, reproduced please indicate the source:Article original link: https://www.qcloud.com/community/article/136Source: Tengyun https://www.qcloud.com/communityMongoDB single-instance mode, one Mongod process is an instance, one instance contains several db, and each DB contains several tables.MongoDB uses a special table to local.oplog.rs store Oplog, which is characterized by a fixed size, full of deleted oldest records inserted into

%/*}/arbiterDaemon--user mongod "Mongod--config arbiter.conf"[Email protected] ~]#Note: The owner of the arbiter.conf file, the genus Group is MongodSecond, start the service, configure the replica setService Mongod Start/data/mongodb/startaribiter.shStart a second nodethen: in Primary on,Rs.initiate ()Rs.add ("Mongodb2.example.net")Rs.add ("Mongodb3.example.net")Rs.addarb ("mongodb1.example.net: 27029")If you want to reduce Primary The priority level

In our previous blog, we focused on how to build a MongoDB replica set under the Windows platform. Detailed Blog Address:As space is limited in the previous article did not verify the results, in this blog we mainly test:Through the Rs.status () command we can query to each node to run normally.First, the data synchronization testInsert on port 28011, 28012:View reason: Find the answer onlineFirst of all this is normal, because secondary is not allowe

I will talk about the replica set in the previous phase. The primary features of the replica set are embodied in two aspects: 1. the replica set does not have a specific primary database. 2. If there is a fault such as a crash, the cluster selects a database as the primary database, which provides the automatic fault recovery function. Next we will perform the fo

Tags: auth date introduction states like theory knowledge role bash downloadBrief introduction MongoDB Replication (replication) is the process of synchronizing data across multiple servers. The master node records all operations on it, oplog the primary node periodically from the node, and then performs these operations on its own copy of the data, ensuring that the data from the node is consistent with the primary node. Replication provides redundant backups of data and stores copies of data o

About Windows platform Building MONGO database replication Set this topic, I have written two blog posts in frontFirst article: How to build a MONGO database replica set on the Windows platformSecond: Data synchronization and fault adaptive testingIn this article, let's focus on the replication set, and analyze how it worksFirst, common scenariosLoss of network connectivity between application and databaseScheduled outages, power outages, database ser

A complete example of building a MongoDB cluster (replica set + Shard) ...Prepare four machines, each bluejoe1,bluejoe2,bluejoe3, and BLUEJOE0The replica set and the Shard policy determine such as the following: 3 replica sets will be created, named Shard1,shard2,shard3; The above 3 replica sets as 3 shard

# Where and how to St Ore data. Storage:dbpath:/home/dd/mongodb/db #数据文件存放目录 journal:enabled:true # Engine: # Mmapv1: # Wiredtiger: # How The process runs ProcessManagement:fork:true #以守护程序的方式启用, that is, running in the background pidfilepath:/home/dd/mongodb/mongod.pid # Locatio N of Pidfile # network Interfaces net:port:27017 #端口 bindip:0.0.0.0 # Listen to local interface only, comment to Listen on all interfaces. #security: #authorization: Enabled #operationProfiling: replication: strong>

View MongoDB replica set again Because MongoDB uses memory ing files, the 64-bit version is required. Official: http://www.mongodb.org/downloads Mongodb version used in the lab environment is mongodb-linux-x86_64-2.6.0 Built on three virtual machines, the configuration is single-core and 1 GB memory. The experiment environment is as follows: MongoDB replica sets are different from the previous master-slave

Hyper-V replica is one of the new features of hyper-V 3.0. It uses the hyper-v volume Copy Service (VSS) editor) to the secondary host. This provides disaster recovery for hyper-V 3.0. Hyper-V replica creates a copy based on the VM-to-VM principle. Although you can use hyper-V replica to copy each VM to a backup host, in my experience, this tool is more suitabl

MongoDB Auto-sharding solves the problem of mass storage and dynamic capacity expansion, but there are some distances from the high reliability and high availability required for the actual production environment, so there is a "Replica sets + sharding" solution.ShardUse replica sets to ensure that each data node has backup, automatic fault-tolerant transfer, and automatic resilience.ConfigUse 3 configurati

Tags: Oar 3.3 Next restore Application Data set recovery EnvironmentIn this article, let's focus on the replication set, and analyze how it worksFirst, common scenariosLoss of network connectivity between application and database Scheduled outages, power outages, database service hard drive failures, and more Replication can fail over and replication allows you to balance read loads between replicas, keeping replication nodes in sync with the primary nodeSecond, the principle of workThe

Solution This is relatively simple. You can directly use semi sync to synchronize data to the TokuMX environment in real time without stopping the application. Migration solution without changing servers The application of this solution needs to be stopped for several seconds or several seconds affected.The connection string must be written into the ip address and port of the two nodes. 1. Remove the slave database and delete the data directory files (release space) of the machine where the

The secondary node in the replica set is not readable by default. In applications where there is less write-read, the replica sets is used to achieve read-write separation. By specifying Slaveok at the time of connection, or by specifying the secondary in the main library, the pressure of reading is shared by the primary and only the write operation is assumed.If you access MONGO through the shell, you want

For children's shoes developed by beginner Android mobile games, directly viewing the source code is the fastest way. Although there are many open-source games on the Internet, they are all games with little reference. Replica Island is a good game on the Android Market. It is excited that it is open-source and that children's shoes that want to improve game development are blessed. It should be noted that the source code is large and it may be easie

value "Shard1" is the configuration name, multiple use, need to unify. Members are the MONGO instances, and the arbiteronly:true in the third member indicates that the member is the quorum server. Rs.initiate (config) enables this configuration.5.2. View replica Set configuration: Rs.status ()5.3, change the replica set configuration:var config = rs.config ();Config.members[0].host = ' 120.27.194.222:27311

Tags: etc from step TPS file Digital Dash Ofo shouldHow to monitor MongoDB replica set using PrometheusThere are many ways to monitor MongoDB replica set: Using Zabbix template to view MongoDB data (Zabbix+grafana) MongoDB official own but now charge for Prometheus collects data through Mongodb-exporter and then uses Grafana to display data (Prometheus+grafana) etc... Install Prome