seagate replica

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,

. secondary perform write operations based on the obtained logs. F. After the execution is complete, secondary obtains the new log. The condition for pulling oplog to primary is {ts :{$ gt: t }} G. primary now receives the secondary request and learns that secondary has successfully executed the write operation logs whose request time is greater than t. H. At this time, the getLastError command detects that both primary and secondary have completed the write operation, so w: 2 meets the conditio

Summary and solution of Mongodb replica set erection problem The replica set of the MongoDB database is composed of multiple servers, one of which is the primary node, the other is from the node, and if the primary node is down, it automatically switches to any one from the node. If the previous master node repair completed and normal operation will automatically become from the node, from the node can not

1. What is the millet router official replica? Official reprint is the name of the officially refurbished version. Millet will return the validity of the recovery of the millet router, update parts, strict assembly inspection and equipped with new accessories, repackaging the factory for sale. 2. Is there any guarantee for the quality of the millet router official piracy? We assure you that each of the millet router official pirated copies have bee

Tags: docker1. Host and container planning Docker host Container name Port Replica set 192.168.0.40 M40 27017 Rs0 192.168.0.41 M41 27017 Rs0 192.168.0.42 M42 27017 Rs0 2. Create container 2.1 to create a container on host 40 M40docker run --name m40 -d

:/sys/kernel/mm/transparent_hugepage/enabledis ' always '. 2015-06-30t17:37:53.905+0800icontrol[initandlisten]** Wesuggestsettingitto ' Never ' 2015-06-30t17:37:53.905+0800 ICONTROL[initandlisten] 2015-06-30t17:37:53.905+0800icontrol [initandlisten]**WARNING:/sys/kernel/mm/transparent_hugepage/defragis ' Always '. 2015-06-30t17:37:53.906+0800icontrol[initandlisten]** Wesuggestsettingitto ' Never ' 2015-06-30t17:37:53.906+0800 ICONTROL[initandlisten] >showdbs; Local0.078gbThe following will appea

/mongod:master EXPOSE 27017 entrypoint ["Usr/bin/mongos"] To build the image: sudo docker build-t robin/mongos:master. The second step starts the Docker container required for the MongoDB cluster: Create a replica set 1 Docker run--name rs1_srv1-p 21117:27017-d robin/mongod:master--noprealloc--smallfiles--replset rs1 Docker Run-- Name Rs1_srv2-p 21217:27017-d robin/mongod:master--noprealloc--smallfiles--replset rs1 Docker run--name rs1_srv3 -P 2131

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

How does one modify the Oracle replica set in Linux ?, Linuxoracle code The Oracle replica set installed on the virtual machine is different from the replica set installed on Windows. Refer to the online documents to modify the replica set on the server, and make a summary and record here. 1. log on to the Oracle us

The following figure shows the mongdb cluster architecture to be built. Create the first replset folder ------------------ create directory mkdir-P/data/replset_sharding/replset1/r0mkdir-P/data/replset_sharding/replset1/r1mkdir-P /data/replset_sharding/replset1/r2mkdir-P/data/replset_sharding/replset1/log can be changed to the following one (this is for the convenience of viewing logs, view it directly in the command line output)/apps/Mongo/Bi N/mongod -- dbpath/data/replset_sharding/replset1/R0