database slaves, and the read operations occur on the slaves, and the frame composition is as follows:
If the above figure in Slavec is not available, read and write will not be interrupted, such as Slavec recovery will automatically synchronize the lost data, and can be back into operation, maintainability is very good. But if Master has a problem, it solves only the high availability of re
Oracle released MySQLFabric to simplify the high availability and scalability of MySQL. Beijing, May 28, 2014-Oracle announced the launch of MySQL Fabric to meet current requirements for Web and cloud applications. MySQL Fabric is an integrated system that simplifies the management of MySQL database groups. This product provides high
MHA high availability deployment and Testing
MHA high availability deployment and testing, MySQL high availability solution
Directory
I. MHA featuresIi. MHA MechanismIii. Master-slave architecture applicable to MHAIv. Construction
1. What is drbd?Drbd (Distributed replicated block device), known as "Network raid", is an open-source software developed by linbit.2. Main Functions of drbdDrbd is actually a block device implementation and is mainly used in high availability (HA) solutions on the Linux platform. It is composed of kernel modules and related programs. It synchronizes the entire device through network communication, which is
What do you mean high availabilityHigh availability generally refers to the redundancy of services, a service is hung, can automatically switch to another service, does not affect the customer experience.High-Availability Registration centerIn a distributed environment such as the microservices architecture, we need to take full account of the failure situation,
Operating mode
Transaction security
Transmission mechanism
Whether arbitration is required
Witness server
Fail over type
Highly Available
Full
Synchronous
Y
Y
Automatic or Manual
High-level protection
Full
Synchronous
Y
N
Manual only
Performance
OFF
Asynchronous
N
N/A
Force only
Tags: technology share GIC binary run new feature keepalive enable ADF receiveOriginal address Author Introduction Wang Songlei, currently serving in Ucloud, is engaged in the MySQL database core research and development work. Mainly responsible for Ucloud cloud database UDB kernel Troubleshooting and new features of the database research and development work. I. Overview When we consider the high-availability
First, elaborated the Linux HA cluster use background;1.1 High-availability cluster definitions:Highly available cluster full name: High Availability Cluster, simply put, the cluster is a set of highly scalable, high-availability,
Comparison of MySQL High Availability Technologies (1)
The pictures and materials are from the MYSQL technical insider of Master Jiang chengyao of MYSQL ).
Database Reliability refers to data reliability; Database Availability refers to database service availability. Reliable data is like the Industrial and Commercial
First, the concept of pacemaker(1) Pacemaker (pacemaker), is a highly available cluster resource manager. It achieves maximum availability of resource management for node and resource level fault detection and recovery by using the message and member capabilities provided by the preferred cluster infrastructure (Corosync or heartbeat). It monitors and recovers node and service-level failures, enabling process-level
Redis cluster is an official redis cluster function provided by redis.1. Why is redis Cluster implemented?
1. master-slave replication cannot achieve high availability 2. as the company develops, the number of users increases, concurrency increases, and business needs higher QPS. However, the QPS of a single machine in master-slave replication may not meet business needs. considering the data volume, when t
0. ConnectingBefore that article written out I think there will be a lot of different views, haha, that only represents my personal opinion ah, welcome to discuss.First of all, I give an example, OA系统 not to say that OA must be so designed, but an exaggerated approach, in order to explain the back 完全脱离了业务场景来进行技术架构的设计就是过度设计 , not that the OA system is too simple so can not be designed, in addition, PHP low write efficiency is only a metaphor, not to belittle the world's best language , it's not n
Environment Introduction
Operating System: CentOS6.5 _ x64 miniLoad Balancing mode: DR (direct routing)Brief description of LVS and Keepalived:LVS is short for Linux Virtual Server, which is a Virtual Server cluster system. The cluster technology and Linux operating system are used to implement a high-performance and high-availability server with good scalabilit
Tags: common ima cache Bubuko over heartbeat Extensible Storage engine based onObjectiveHigh-availability architectures are basically standard for Internet services, and are highly available both for application services and for database services. For a system, it may contain many modules, such as front-end application, cache, database, search, message queue, etc., each module needs to be highly available to ensure the
Lightweight Keepalived for Nginx and LVS High Availability
The keepalived routing software is written in C language and provides simple and robust high availability for the loadbalance Linux system. keepalive dynamically checks, automatically maintains, and manages the health of the loadbalance server pool. On the othe
Tags: china-pub book oracle Computer Interactive Publishing NetworkThis is the high-quality pre-sale recommendation of Oracle class in computer >>>> "Oracle Data High Availability Road" Editorial recommendations This book is especially suitable for Oracle Senior system managers, application developers reading, but also for the care of server technology, data
Build a high-availability cluster in CentOS 7
This article uses two machines to implement dual-collector for high-availability clusters. the IP address of the Host Name node1 is 192.168.123168, And the IP address of the Host Name node2 is 192.168.123169.1. Install cluster Software
Software pcs, pacemaker, corosync, fen
The main implementation is a high-availability server Load balancer web server cluster, suitable for lamp architecture. The front end uses two servers as The lvs + keepalived load scheduler. N servers can be used as the apache + php application server in the middle, and the next two servers are used as the mysql high-availabi
Tag: IP Address server server virtual machine equalizerFunction:Lvs+keepalived in a high-availability load-balancing cluster:· Keepalived is responsible for back-end real server Health CheckIf a real server service fails, it is removed from the Cluster service, and then automatically joined to the cluster after recovery.· Keepalived is responsible for high
Tags: mysql high availabilityThe MMM high-availability MySQL program is a well-developed MySQL high-availability cluster solution written in Perl, based on MySQL master-slave replication, with a Management side (monitor) and multiple agent-side (agent) components. Through MM
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