XLinux high availability server cluster solution LATCH HA

Latch ha is an XLinux Latch series high-reliability server cluster system solution. Today, the smooth operation of various industries depends on computer systems. The ordering, distribution, customer service, financial settlement, insurance, and reservation of commodities all require highly reliable information service systems. This naturally requires the shorter the computer downtime, the better. Latch ha can automatically detect system faults. At the same time, if a computer is found to be faulty, latch ha will transfer all processes on the computer to the backup computer to provide uninterrupted services to the customer. Once the computer goes down, latch ha can reduce the downtime to minutes or even seconds. In addition, the system can be restored to the previous state, thus ensuring the stable operation of the computer. Under the Protection of latch ha, computer systems no longer need to be interrupted due to hardware faults or routine maintenance. Latch ha uses these methods to provide optimal service reliability and minimize computer downtime. You know, a one-minute downtime may cause immeasurable losses to the operation of banks, railways, aviation and other industries. It also has an intelligent detection and processing system for system crashes. She uses various techniques to detect faults in hardware, storage devices, networks, and system software. At the same time, if a computer is found to be faulty, latch ha will transfer all processes on the computer to the backup computer to provide uninterrupted services to the customer. Another key to achieving high availability is the redundancy policy. Simply put, multiple backups of hosts, network devices, and backup devices are not just simple backup machines ): latch ha has multiple redundancy modes, including dual-host online standby mode, dual-host ready mode, and three-host mode. All modes support various backup resources, such as file systems, databases, network IP addresses, system processes, SCSI devices, and NFS. In addition, the implementation of high availability also requires a wide range of application support: latch ha can be applied in a variety of centralized, client-server mode or OLTP systems. At the same time, it is compatible with various mainstream database systems on the market and OLTP Software, such as Oracle, SYBASE, Informix and Tuxedo. Latch ha also provides various application interfaces. Therefore, the customer can integrate various functions in their private software to ensure the high reliability of the system, which also protects the customer's investment.
Typical latch ha solution system structure: two hosts A and B share A disk array, A is the worker, and B is the backup machine. They are connected by a heartbeat line, known as "Heartbeat detection", mainly through a RS232 detection link. Latch ha also uses network ping detection to verify the accuracy of system downtime detection. The HA software installed on the host monitors the running status of the other Party in real time through the heartbeat line, once the active host A suffers A system fault due to various hardware faults, such as power failure, failure of the main component, or failure of the boot disk, host B is immediately put into work. Latch ha implements the "high-reliability shared storage" architecture. The architecture consists of two or three Redundant servers, one shared redundant disk array, one optional DBMS, and latch ha system software. Under the Protection of latch ha, enterprise computer systems can provide uninterrupted information services to avoid downtime caused by hardware faults or routine maintenance, therefore, we can first achieve optimal reliability and minimize downtime.
Detection of shared storage device faults latch ha can identify shared storage device faults caused by the following reasons: failure of SCSI adapter, failure of SCSI connection, or failure of RAID Controller. Shared storage device faults can also lead to misoperations or even system downtime of software accessing these devices. Network failure detection latch ha can identify network connection faults caused by the following reasons: network adapter failure or network connection failure. These faults will make all network-dependent operations impossible. Process Termination check latch ha can detect whether the software process Exits normally. This means that different actions can be taken as a process ends. Adjustable detection timeout settings the system downtime detection and network detection timeout settings can be adjusted. Shorter timeout settings mean faster Fault Detection and server switching. However, this may lead to a reduction in the reliability of detection. 2. The server switching mode is automatic or manual. Generally, latch ha automatically detects system faults and transfers the service from an Invalid server to a backup server. Of course, the administrator can also manually switch to the backup server for some routine maintenance work. Once the failed server is restored, you can switch the service to the original computer. This feature can also be automatically completed. 3. Reliability network reliability latch ha enables high-reliability TCP/IP networks. When the network connection on a server fails, the backup server will provide services to users with the same IP address. For example, the NFS service is completely transparent to users. Shared RAID reliability shared RAID can have two or three connection ports and redundant disks. These features ensure that latch ha will not fail due to a SCSI hard disk failure. Reliability of the shared file system when a server goes down, the file system on the shared storage device may be incomplete. After the server is switched, the backup server can automatically repair the shared file system. Process reliability latch ha places the required processes in the shared file system and records them on both servers. In this way, when two servers are switched, the same group of processes can be started. Database reliability latch ha can work with a series of DBMS. Of course, the database must be created on a shared storage device. When the database server goes down, latch ha switches the DBMS to the backup database server. Rollback recovery) ensures the integrity of data in a shared database. 4. Applications of latch ha can be applied in various centralized, client-server mode or OLTP systems. At the same time, it is compatible with various mainstream database systems on the market and OLTP Software, such as Oracle, SYBASE, Informix and Tuxedo. Latch ha also provides various application interfaces. Therefore, customers can integrate various functions in their private software to ensure high system reliability. A) latch ha/HS2000 online standby mode
In this mode, a server acts as the master server. Under normal circumstances, it undertakes all the services. The other server acts as the standby server. Normally, it does not perform any operations except monitoring the status of the master server. Once the master server goes down, the slave server takes over the work and becomes a new master server. Customers can still have the same server IP address, NFS, Data, database, and other ...... This application mode is similar to the typical application mode described above-A and B are actually completing the same functional application, the HA software installed on the host monitors the running status of the other Party in real time through the heartbeat line, once the active host A suffers A system fault due to various hardware faults, such as power failure, failure of the main component, or failure of the boot disk, host B is immediately put into work. B) LATCH HA/DA2000 dual-host ready mode
In this mode, both hosts share their own disk arrays as the master server, and each server is responsible for some services. For example, server A is executing application A and server B is executing application B. Under normal circumstances, both hosts run their own application logic independently. Both hosts act as the standby server of the other, monitor the status of the peer through the heartbeat line. Once a server goes down, the other server undertakes all the services and serves all the customers. And once server A fails, server B immediately takes over the original application of server A; or server B fails, server A immediately takes over the original application of server B, this is a redundant mode. Obviously, once one server goes down, the work clothes of the other server are heavy, so the following three host modes are available. C) latch ha/HC2000 three host mode this application mode is the highest-end HA application mode, which not only ensures system equipment redundancy, but also avoids system downtime, in addition, it can ensure that there are enough system resources for use in case of downtime.
In this mode, the Standby server C also monitors the status of the master server A and B. Once server A or server B goes down, server C will assume its services and serve customers. This system structure not only ensures the safe operation of the system, but also ensures the system resources. Currently, Marketing forecast is monopolized by well-known vendors such as IBM and HP for high-availability system-level solutions, while Linux applications are limited to desktop and small and medium-sized enterprise applications. However, I believe that with the development of e-commerce and Linux and the increasing requirements on the application environment, the high availability applications of Linux will be widely used. The high availability solution based on latch ha has application instances HS2000, DA2000, and HC2000 in various application modes, which can meet the requirements of various industries for computer systems. I believe that in the Linux era, building the above high-availability cluster system Xlinux Latch/LATCH HA series will surely become one of the driving powers behind Linux applications in the industry, and we will work together to push Linux into a new field!
Appendix: XLinux introduces the rapid growth of e-commerce and its applications, promoting the development of Linux, and the functions of Linux are constantly improved by various Linux manufacturers and enthusiasts. However, Linux is still different from other systems such as Windows and Unix in terms of ease of use and reliability. XLinux is narrowing this gap. XLinux is the latest Linux operating system launched by meishang nethu. There are two main differences between her and other Linux systems that we are familiar with: 1. core-based multi-language support: XLinux uses the brand new structure of the "Earth text font"-GCS hichina Code), which can process multiple languages and has strong language compatibility, supports UNICODE, traditional Chinese, simplified Chinese, Japanese, Korean, Thai, Tibetan, Vietnamese, and various Western languages, we believe you are not the only supported language !!!). To promote the cultural and smart assets of various countries, the system supports a variety of internal codes, and supports up to 75,000 + characters of CCCII Chinese, so that the total number of texts supported by the world is more than 100,000 words. 2. simple and Easy-to-use operation and installation interface: XLinux also provides the smart Configuration Wizard Genie for cumbersome Linux programming programs and commands, you can easily set hardware, time zone, system service, various services in the LAN, and Xwindow in the menu mode to manage Linux servers. She turned complex Linux commands into simple ordering operations, so that users do not have to have very professional Linux knowledge, but also can successfully implement system and network management. I think this feature is the most attractive to our end users, because it allows us to completely discard the various work such as disk partitioning, setting boot partitions, and configuring hardware when installing Linux, it is like installing Windows, which we are familiar with, and the setup work after the installation is also implemented in the menu command. You do not have to modify the Config files one by one, this is not a good news for our users. XLinux product category: XLinux has three complete series: Optima, Motiff, and Latch. She is a series of advantages based on a complete XLinux operating system, comprehensive industrial applications as the core, and high availability solutions. The Optima series consists of OptiLAN, OptiWAN, and OptiDESK. Provides the LAN-based, Wan-based and Personal desktop operating environments. The Motiff series consists of Motiff Community, Motiff Portal, and other products. Provides virtual community and e-commerce solutions based on XLinux (compatible with other manufacturers' Linux versions. Latch series is a product designed to meet the strong demand of high availability and high reliability solutions in the Linux market. He provides Linux-based system redundancy backup and system cluster solutions to meet the "demanding" requirements of computer systems in special industries such as finance and insurance.