mongodb high availability

Binlog, records every operation performed on the master node, and secondary synchronizes data by copying Oplog and applying it. Oplog size is fixed, the default allocation of 5% of free space (64 bits), of course, we can also use the –oplogsize option to specify the size of the appropriate size in production applications is a very important link, we may wonder why? This is because Oplog and MySQL binary are different, it is recycled, it is different from the Oracle log, no more than a group of

I. Environmental preparedness 1. This example uses 3 Linux hosts, with IP addresses as follows: Click (here) to collapse or open the Server a:192.168.1.231Server b:192.168.1.232Server c:192.168.1.2332. According to the need, open the corresponding host firewall related ports. This time need to use 3 hosts, so open the following ports of these 3 hosts: Click (here) to collapse or open-A input-m State--state new-m tcp-p TCP--dport 27017-j ACCEPT-A input-m state--state new-m tcp-p TCP--dport

Building a high-availability MongoDB cluster (iii)--deep inside the replica set internal mechanismIn the previous article, "Building a high-availability MongoDB cluster (ii)-Replica set" describes the configuration of the replica

}}, usedbtest; for (var i=0; I' str_' + i}); If the dbtest already exists, you need to make sure it has been id indexed to build!After a period of time, the db.coll1.stats() explicit shard state is run:{"Sharded":True"NS":"Dbtest.coll1",The Count": 10000, ....."Shards": {"Shard1": {"NS" "Dbtest.coll1" "Count" : 0, "Size" : 0, ...}, Shard2 ": {" Ns "", "Count" : 10000, "Size" : 559200, ...} ...} As you can see, the shards are already in effect, but the distribution is uneven, and

Copy of dataA set of replicas in MongoDB is a bunch of mongod processes that maintain the same set of data. Replica sets provide redundancy and high availability, and are the basis for deployment of production environments.Data redundancy and availabilityBy storing the same data on different servers, the replica mechanism guarantees a degree of fault tolerance, t

In the production environment, the MongoDB shards are built, providing three mongos interfaces. However, there is no failover mechanism in MongoDB, the official recommendation is to deploy MONGOs and application servers together, multiple application servers will deploy multiple MONGOs instances, which is inconvenient. Check it out, there are several ways to make these three mongos interfaces available, red

Label:The cluster architecture diagram is as follows:Cluster approximate file structure: (192.168.137.101 nodes) Build 3 Replica Sets firstRs1/mongod.confrs1/start.shRs2/mongod.confThe back resembles ...MONGO 192.168.137.101:10001/adminconf = {_id: "Rs1", Members:[{_id:0,host: "127.0.0.1:10001", Priority:2},{_id:1,host: "127.0.0.1:20001", priority:1},{ _id:2,host: "127.0.0.1:30001", Arbiteronly:true}]}Rs.initiate (CONF)Rs.status ()To open the configuration nodeBuilding a Routing nodeShard Co

Tags: replica data Multiple implementation of automatic simple configuration setup existsMongoDB High-availability cluster switching MongoDB's simplest cluster mode is the three-node replica set (replica set), which ensures that after a node failure, the remaining nodes can continue to provide services. In the MongoDB cluster, there is also the role of th

balance between. More discussion of system performance and architecture is also being carried out around consistency and availability.2) engineering practices for OpenStack, Swift and CapIn contrast to cap theory, OpenStack's distributed object storage System, swift, satisfies availability and partition tolerance, without guaranteeing consistency (optional), but achieving eventual consistency. Swift if the

Since SQLServer2005, Microsoft has provided a variety of high availability technologies to reduce downtime and increase protection for business data. With the continuous release of SQLServer2008, SQLServer2008R2, and SQLServer2012, SQLServer has multiple high availability technologies that meet different scenarios. Bef

Since SQL Server 2005, Microsoft has provided a variety of high-availability technologies to reduce downtime and increase protection of business data, and as SQL Server 2008,sql Server 2008 R2,SQL Server 2012 continues to publish, SQL There are many high-availability technologies in the server that meet different scena

Tags: lib part Sch connection Sele storage failure Shang GlusterGlusterfs how to cluster, online a search overwhelming This feature can be used to make a single node high availability, because k8s even if the node down the master will be at random a node to put off the resurrection Of course, I am running in my own environment, through the network of Glusterfs, data transmission, etc. have a certain perform

Why to use MySQL high availability cluster In the actual production environment, when the normal MySQL master-slave replication and read/write separation can not meet the actual requirements, it is necessary to consider the MySQL high-availability cluster, for security reasons, when the data access is too larg

There are many types of high-availability clusters in linux, such as common heartbeat, corosync, rhcs, and keepalived. The emergence of these cluster software provides high-availability assurance for our business production environment, this article will briefly introduce how to use heartbeat v2 to build a simple http

There are many types of Linux high-availability clusters, such as common heartbeat,corosync,rhcs,keepalived, which provide a high-availability guarantee for our business production environment. This article will briefly introduce the V2 version of heartbeat to handle a simple HTTP