High Availability

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An implementation method of HA and load-balanced cluster lb for high availability cluster

Cluster is a hot topic, in the enterprise more and more application of Linux operating system to provide mail, Web, file storage, database and other services, with the growing application of Linux, high availability and http://www.aliyun.com/zixun/aggregation/ 13996.html "> Load balanced Linux cluster is also developing gradually in the enterprise. The low cost, high performance and high scalability of the Linux platform enable the Linux cluster to meet at a low price ...

LDAP Server Environment centralizes management of IBM PowerHA systemmirror High Availability cluster

IBM System Director provides a dedicated management platform that consolidates operations and simplifies configuration steps to achieve centralized management. Due to the limitation of space, this article can not elaborate on each of the concepts and terminology involved. You can find out the relevant information about the concepts appearing in the text for the specific environment. The focus of this paper is to emphasize the actual operation steps and methods. The article will pay attention to the expression of the operation of the steps and operational results of the analysis. Introduction to some important concepts of IBM bae Directo ...

What is high availability (HA)? What is ha?

Highly available ha (high availability) refers to improving system and application availability by minimizing downtime due to day-to-day maintenance operations (schedules) and burst system crashes (unplanned). It is different from the fault tolerant technique which is considered to be uninterrupted operation. The HA system is the most effective way for enterprises to prevent the core computer systems from being shut down. Features of high Availability (HA) 1, software fault monitoring and exclusion 2, backup and Data protection 3, management station can monitor the operation of each site, can be at any time or timing report system operation ...

High Availability Virtualization Network is a fallacy

Whether it is a virtual machine crash or a host error, the High Availability Virtualization (HA) utility guarantees that the virtual machines that are wrong can be restarted automatically.   These HA applications have created unrealistic expectations for http://www.aliyun.com/zixun/aggregation/7155.html > Developers and server Administrators. The server management team is beginning to believe that they can apply HA tools to a wide variety of enterprise casing programs, but recently brought by the mobility of virtual machines between data centers ...

IPV6 High Availability Web server cluster on IBM i HTTP server

Today, more and more enterprises recognize the importance of high availability (HA) for their WEB servers, after all, customers need reliable services. At the same time, more and more organizations are beginning to transition from IPV4 standard to http://www.aliyun.com/zixun/aggregation/9485.html ">ipv6 standard. The new requirements for supporting high-availability WEB services in IPV6 environments arise. Web in IPV6 environment ...

The high availability of cloud computing is increasingly valued by the market

Recently, http://www.aliyun.com/zixun/aggregation/32714.html "> news media is more focused on cloud computing, so you will rarely hear about high availability." 5 years ago, the IT community was very focused on high availability and cluster development. But in the near term, things are different. In any case, high availability remains one of the key topics in the IT world, says Kai Dupke, senior product manager at SuSE. The IT industry is more focused on the flexibility of cloud computing and the advantages of low cost ...

NEC Cluster high availability solution to meet the reliable operation of medical core system

Can you imagine the consequences of a patient's medical information system interruption in the course of medical treatment? Stable system, efficient service in the medical profession is particularly important in addition to the timely release of patient pain, and even return to life. Whether in the registration, medical treatment, hospitalization, fees and other processes, any point of the system failure will trigger a ripple effect. In a critical business system that requires continuous operation, the business stop caused by failures such as server downtime will result in immeasurable loss. In the form of the new medical reform, the information process of healthcare industry is advancing rapidly, more and more hospitals are speeding up ...

Oceanbase High-availability scenarios

Oceanbase high-availability scenarios Yang Shunhui Traditional relational databases are highly available based on shared storage or primary standby synchronization. These scenarios either rely on the high availability of hardware, but are costly, or cannot meet strong consistency and high availability at the same time. Oceanbase combines cloud computing and database technology to achieve a highly available solution based on Paxos protocol. This scheme is built on a common server with low cost Inexpensive, while satisfying strong consistency and high availability. Oceanbase High-availability scenarios

Research and optimization of mapreduce high availability

Research and optimization of mapreduce high availability Huang Weijian Zhou Yi Love in order to improve the usability of MapReduce, a distributed jobtracker Node model optimization scheme is proposed. One of the core technologies of Hadoop mapreduce the job scheduling process in the programming model, points out the performance bottleneck caused by single jobtracker, and puts forward the corresponding optimization scheme. The original mapreduce of the single Jobtracke ...

memcached high availability cluster theory and introduction

memcached high availability cluster theory and introduction. memcached In the realization of distributed cluster deployment, the memcached service is not between the communication, the distributed algorithm is through the client bar Data stored in different memcached, so when we finish the cluster client to write data inside, Will appear the following situation. After the client writes data to a memcached node, the other two nodes can not be queried. So how the outcome of this issue, is the next to be done. memcached ...

High-availability security in the cloud, and look at the Auth0 across the provider cloudy architecture

Auth0 is a "status as a service" start-up company, but also a heavy cloud service users. For them, service outages mean that a lot of user-managed applications cannot log in, so availability is critical to them. Recently, Auth0 Engineering director Jose Romaniello shared a cloudy architecture that they could exempt across providers from a wide range of Microsoft Azure downtime. Auth0 is a "status as a service" start-up company that allows users to ignore the underlying infrastructure for mobile ...

Document] High Availability Based Migration analysis to Cloud Computing for high substituting businesses

High Availability Based Migration analysis to Cloud Computing for high substituting businesses Dilip K. Prasad This study provides a P Aradigm and a useful framework for analyzing cloud comp ...

Memcached+magent+keepalived High Availability cluster II

Memcached+magent+keepalived high Availability cluster two. We have already configured the memcached+magent below if the magent is down, it is not possible to continue to provide services, so we used keepalived to add a standby magent proxy server. When a magent is down, it is replaced by another. Configuration steps: Two magent proxy Server, a set of one to do from, when the main downtime from the successor to continue to work. Two Magen ...

HTTP session memory replication characteristics are key to the high availability of the was cluster

However, this feature requires the support of the application code, so when the was cluster architecture is selected, the Http://www.aliyun.com/zixun/aggregation/14134.html "> Cluster deployment approach is determined according to the current application. and give professional advice. Architects and software engineers must be aware of the specifics of this feature in order to be more handy when designing a cluster architecture. HTTP session memory replication refers to replicating a session to another application server ...

Implement SLA-based high availability in the cloud for System X and System P

High Availability (HA) is a term often associated with cloud http://www.aliyun.com/zixun/aggregation/13748.html "> Infrastructure solutions, which refers to business continuity and minimal downtime." In particular, HA in any cloud infrastructure should have the following objectives: Reduce planned downtime to prevent unplanned outages and quickly restore continuous availability from downtime support cloud infrastructure is a modern virtual machine management program, which provides a solid ...

HDFs Federation and High Availability

The main limitation of current HDFS implementations is a single namenode. Because all file metadata is stored in memory, the amount of namenode memory determines the number of files available on the Hadoop cluster. To overcome the limitations of a single namenode memory and to extend the name service horizontally, Hadoop 0.23 introduces the HDFS Federation (HDFS Federation), which is based on multiple independent namenode/namespaces. The following are the main advantages of the HDFs Alliance: namespace Scalability H ...

Memcached+magent+keepalived High-availability cluster

Last article we said memcached to achieve high availability and prevent a single point of failure can be implemented through magent, next we configure a highly available cluster magent proxy server: 192.168.200.101 memcached node: ( Can be on the same server to open three memcached node to see the previous introduction, can also be one server one memcached:192.168.200.100 11000 port memcached:192.168.2 ...

FortiOS 6.0 Getting Started: High availability with two FortiGates

This recipe describes how to add a backup FortiGate to a previously installed FortiGate, to form a high availability (HA) cluster to improve network reliability.

FortiOS 6.0 Expert Recipe: High Availability with FGCP

This recipe describes how to enhance the reliability of a network protected by a FortiGate by adding a second FortiGate and setting up a FortiGate Clustering Protocol (FGCP) High Availability cluster.

Implementation of centralized management of high availability clusters by IBM System Director

The application environment is a SAN architecture with IBM Power7 's minicomputer and IBM DS5020 storage as its core. The article is based on the graphical interface as a datum point, the interception of a large number of operation results screenshots and a text for each picture, I hope that through the text of the picture plus writing mode to the reader to bring a more intuitive understanding, and to bring you help and inspiration. This section provides a description of some of the terms and abbreviations that appear in this article. To avoid lengthy articles, there will be no repetitive explanations. IBM Director Server I ...

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