as400 high availability

localhost localhost.localdomain localhost4 localhost4.localdomain4::1 localhost localhost.localdomain localhost6 localhost6.localdomain6slave01 172.168.1.103master01 172.168.1.101router01 172.168.1.102router02 172.168.1.104slave02 172.168.1.105Important NOTES:For the rapid implementation of the environment to achieve a demonstration effect, it is recommended that 6 virtual machines to turn off SELinux and iptables, to ensure that the server's system time is consistent, you must ensu

I will briefly describe this architecture:Generally, for the convenience of maintenance, the servers of the enterprise website are all in their internal data centers, and only two ports 80 and 443 of the Keepalived VIP address are opened, which are mapped out through the Juniper SSG550 firewall, the Internet DNS corresponds to the mapped public IP address. The firewall and network security of this architecture are described as follows: This system architecture only maps ports 80 and 443 of the I

Recently, HAproxy + keepalived + mysql was used to test the high-availability Linux system cluster.HAProxy is a free proxy software that provides high availability, load balancing, and TCP (Layer 4) and HTTP (Layer 7) applications, with HAProxy, you can quickly and reliably provide Proxy solutions based on TCP and HTTP

??? In actual production and development, if multiple nodes coexist, You need to select the master node and implement HA automatic fault tolerance. I have thought about the writing method and shared it with you. The Lease protocol and MysqlACID High Availability primary selection solution are designed. Applicable scenarios: Java language implementation description further optimized ??? The system has many a

: This article mainly introduces nginx + keepalived high-availability server load balancer. if you are interested in the PHP Tutorial, refer to it. Let's just talk about nginx installation and configuration, as well as server load balancer. you can refer to another article I wrote, "nginx server load balancer practice", and what about server load balancer, let's take a look at the two other articles I have

MySQL primary master replication +lvs+keepalived for MySQL high availabilityMySQL replication can ensure the redundancy of the data and read and write separation to share the system pressure, if the primary master replication can also be good to avoid the primary node single point of failure. But there are some problems with MySQL master replication that do not meet our real needs: A unified access Portal is not provided for load balancing, and if Mas

. The CPU load calculation method is:CPU minimum configuration =CPU Master Frequency * Number * utilization650) this.width=650; "src=" http://s3.51cto.com/wyfs02/M00/71/52/wKioL1XLRtPCXtX5AAQlpWklZtg434.jpg "title=" 10.jpg "alt=" Wkiol1xlrtpcxtx5aaqlpwklztg434.jpg "/>For example, the current CPU frequency is 2.5G, so the minimum requirement for the CPU after migration is: 2.5*8*8%=1.6g.Third, design ideasConsidering the server fault tolerance and the single point of failure of the network, the f

Tags: Linux high availability cluster scheme configuration Heartbeat v2 based on Crm+hb_gui interface MySQL configuration high availability httpd LVSThis chapter mainly configures the heartbeat v2 based on the Crm+hb_gui interface and configures the highly available Httpd,mysql,lvs.650) this.width=650; "src=" Http://ww

OpenStack Highly Available configuration documentationDescribes the highly available OpenStack cloud platform with two physical hosts, which mainly describes the highly available configuration of MySQL and RABBITMQ.• installing the openstack Cloud Platform (OpenStack I version deployed on two hosts ) Installation of the CentOS operating system, due to the high availability of services such as MySQ

Tags: ha high availability keepalived read/write separation MHAExplore MySQL's high-availability architecture MHA (6)-----build MySQL High-availability series (total 9 articles)The previous article describes the architecture of th

(i) Database mirroring1, support compression transmission2. Support automatic page repair (msdb: suspect_pages)(ii) Database cluster1, support multi-subnetA SQL Server multi-subnet failover cluster is a configuration in which each failover cluster node is connected to another subnet or other subnet group. These subnets can be in the same location, or they can be in geographically dispersed sites. Clustering across geographically dispersed sites is sometimes called a stretch cluster set. Because

Frequently Asked Questions about High Availability of SQLServer every time we talk about high availability of SQLServer. Many DBAs, especially SQLServerDBA, feel a pain in their hearts: Because we all think that SQL Server cannot or is difficult to implement SQL Server. Yes Frequently Asked Questions about

Article Title: DRBD notes: high availability solution for Linux. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source. DRBD is actually a block device implementation and is mainly used in high a