synchronous replication

Research and Implementation of Synchronous Replication Technology in Mobile Database System

移动数据库系统同步复制技术的研究与实现

The globalization of economic development makes the requirement of data real-time synchronous replication of distribution application system higher and higher .

经济的全球化发展促使分布式应用系统对数据同步复制的要求越来越高。

The Implementation of Data Real-time Synchronous Replication Based on the Oracle Trigger & In the Customer Medical Insurance System

基于Oracle触发器的数据实时同步的实现&在员工医疗保险系统中

HADR provides for synchronous replication of all logged DB2 operations .

HADR提供所有被日志记录的DB2操作的同步复制。

Metro Mirror is the synchronous replication option .

MetroMirror是同步复制选项。

In many environments , synchronous replication is not a valid option because of the performance impacts of a synchronous implementation .

在很多情况下，同步复制都不是有效的选项，因为同步实现对性能影响非常大。

Meanwhile , deal with mobile transaction is the key technique in mobile database field , it use synchronous replication technique to keep the consistency .

移动事务处理是其中的关键技术。

Synchronous replication is available in two implementation methods , disk storage replication and DB2 High Availability Disaster Recover ( HADR ) .

同步复制有两种可用的实现方法：磁盘存储复制和DB2HighAvailabilityDisasterRecover（HADR）。

Synchronous replication copies data operations using distributed transaction management that applies operations to all copies ( almost ) simultaneously as a single unit of work .

同步复制使用分布式事务处理管理复制数据操作，（几乎）同时的作为工作单点，将操作应用到所有复件。

The results show that this method can effectively reduce the data transmission capacity in the process of synchronization and save time , improve the efficiency of wireless transmission in synchronous replication .

结果表明这种方法可以有效减少同步过程中的数据传输量并节省传输时间，有效的提高同步复制中无线传输的效率。

Synchronous replication means no data loss when a JVM exits but it is slower as the primary must wait for the replicas to acknowledge they have received the change .

同步复制意味着JVM退出时，没有数据丢失，但由于主进程必须等待获得变更信息的复制品，因此速度会慢一些。

Google manages to attain such high levels of disaster recovery through synchronous replication on at least two other datacenters beside the one holding the data the user is accessing at any moment .

Google能够在发生问题的时候，和至少两个数据中心的数据进行同步，从而能够从高级别灾难中恢复。

With synchronous replication , the write on the production node does not complete until it has been received on the target node , so you are guaranteed identical copies on each side .

对于同步复制，目标节点不接收到此写入操作，生产节点上的写入操作就无法完成，这样可以保证两边的复制一致。

Data Mirroring System is volume-based and works in LVM , Synchronous Replication Protocol is used to control the writing process , and a log field is designed to store and manage the data which is being operated in the system .

数据镜像系统工作在LVM之上，是基于卷的复制，它使用同步复制协议实现实时镜像，具体实现时通过设立一个日志区对正在处理的写数据进行保存与管理。

At present , the most commonly used is three-tier replication architecture . It is also the most complex synchronous replication architecture , but it costs too much system resources when running and its execution efficiency is affected deeply by the specific environment and transaction .

目前最常用的是三级复制模式，同时它也是目前最为复杂的同步复制模式，它运行时耗费的系统资源较多，执行效率受具体环境和执行事务的影响较大，在性能上仍需要改进。

The advantage of this solution is that it provides everything from asynchronous replication that is not best effort to guaranteed synchronous transactional replication .

此解决方案的优势在于，它提供从非尽力服务的异步服务到有保证的同步事务复制的所有选择。

Replication can be configured using synchronous or asynchronous replication .

复制可以配置为同步或异步复制。

It consists of a pair of servers the primary and the HDR secondary and supports both synchronous and asynchronous replication modes .

它由一对服务器组成主服务器和HDR备用服务器并且同时支持异步和同步复制模式。

Synchronous failover availability comes in two types : specialized HA software and synchronous replication .

同步故障转移可用性有两种类型：专门化的HA软件和同步复制。