postgresql high availability

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

Directory:Definition of a highly available cluster Ii. Metrics for high-availability clustersIII. hierarchical structure of highly available clustersIv. classification of high-availability clustersFive, high-availability cluster c

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,

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

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

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: replicat ase process YSTEMD SCP program Col technology share load BalancingMariadb-mmm High-availability clusters1.MYSQL-MMM Overview MMM (Master-master Replication Manager for MySQL) is a set of scripting programs that support dual-master failover and dual-master daily management. MMM is developed using the Perl language, which is mainly used to monitor and manage MySQL Master-master (dual master) re

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