postgresql scalability

Scalability (extensibility) is a design indicator of the computational processing power of software systems, high scalability represents a kind of elasticity, in the expansion of the system growth process, the software can guarantee exuberant vitality, through very few changes or even just the acquisition of hardware equipment, can achieve the entire system processing capacity of linear growth, Achieve high

Original address: http://www.jdon.com/scalable.htmlScalability (scalability) is a software system computing processing capacity of the design indicators, high scalability represents a kind of elasticity, in the system expansion and growth process, the software can guarantee exuberant vitality, through the few changes or even just the acquisition of hardware equipment, can achieve the overall system processi

. Availability (availability) Usability is the probability or time share expectation that the system can run normally during a certain time of inspection. The study time is a specified moment, then it is called instantaneous usability; the time of the visit is the specified period, and the period availability is called. It is a measure of the equipment in use after the actual use of efficiency, is the equipment or system reliability, maintainability and maintenance of the integrated characteris

Modify tablespaces (modify the automatic scalability of data files) and Data scalabilityModify tablespaces (modify the automatic scalability of data files)When creating a tablespace, you can set the automatic scalability of the data file. When a new data file is added to the tablespaceYou can set Automatic scalability

Recently need to use Redis in C #, found on the Redis official website Servicestack.redis, finally in the test found that this is a pit, 4.0 has been charged, the latter had to find the final version of the 3 series, the final test found that there is still a bug or I will not use. There is no way, it is best to find the Stackexchange.redis, support asynchronous client, it is said that performance is better than Servicestack.redis, and it is said that the stack overflow is also used by this clie

1. scalable design of distributed cacheaccess model of 1.1Memcached distributed cache clustera consistent Hash algorithm for 1.2 distributed cache　2. Scalability design of database storage server clusterThe scalability design of the database storage server cluster puts forward higher requirements for the persistence and availability of the data. The data storage server must ensure the reliable storage of d

Detailed description of javascript Object scalability, and javascript scalability Scalability in javascript objects refers to whether new attributes can be added to objects. All built-in and custom objects can be displayed as extensible objects. For host objects, it is determined by the javascript engine. The following functions are used to set object

the overall architecture is also easy to deploy because you only need to copy the deployment unit-a file or directory-to the machine running the corresponding kind of server. This is a good way for a relatively small application to work. However, for complex applications, the overall architecture becomes unwieldy. For developers, large, monolithic architecture applications can be difficult to understand and maintain. This is also an impediment to frequent deployments. To deploy a change to an

1. Download the source code $ mkdir /usr/downloads$ wget -c http://cn2.php.net/distributions/php-5.6.20.tar.gz$ tar -xvf php-5.6.20.tar.gz$ mv php-5.6.20 /usr/local/src$ cd !$ cd php-5.6.20 2. Read the installation Instructions $ ls -also$ less README$ less INSTALL 3. Installing dependent Packages $ yum install apr apr-util apr-devel apr-util-devel prce lynx 4. Installing httpd $ wget -c http://apache.fayea.com//httpd/httpd-2.4.20.tar.gz$ tar -xvf httpd-2.4.20.tar.gz$ cd httpd-2.4.20$ ./config

Implemented by PostGresql open source database, and both systems are implemented by MapReduce theory.Although these two systems are not as scalable as the previous two distributed computing frameworks at present, they are targeted at real DB scenarios, and data access interfaces fully implement SQL specifications. It is no doubt tempting to use the analysis methods used to play the database through SQL statements. What's more, these two systems basic

Preface The scalable architecture solutions analyzed in the previous sections are basically centered on the database itself. Will this block our thinking on the path to scalability ", it cannot be more extensive. In this chapter, we will jump out of the problem of improving the scalability by relying entirely on the database itself, and extend the scalability o

appropriately Choose the right tool for each job Experience Sharing: relational databases are complex relational database for high scalability, management is often difficult to operate Poorly managed relational databases can cause: data mismatches and why IT systems are down offline Small for start-up teams, less part-time, especially AWS provides a managed relational database MySQL,

MySQL performance tuning and Architecture Design-Chapter 1 Data splitting of scalability design and mysql Optimization Chapter 1 Data splitting for scalable design Preface The expansion implemented through the MySQL Replication function is always limited by the size of the database. Once the database is too large, especially when writing too frequently, it is difficult to support it by a host, we are still faced with expansion bottlenecks. At this tim

. Data Model refers to the data storage method, which has several schools, such as relations, key values, columns, documents and images. In their respective implementations, relational databases include MySQL, PostgreSQL, and Oracle, and key-value databases include memcached, membase, Riak, and Redis, columnar databases include HBase, Cassandra, and Hypertable, document databases include MongoDB and CouchDB, and image databases include Neo4J. When sel

Many programmers spend a lot of time tuning application-level performance bottlenecks as they address JVM performance issues, and when you finish reading this series you will find that I might look at this kind of problem more systematically. I've said that the JVM's own technology limits the scalability of Java enterprise-class applications. First, let's start by listing some of the leading factors. The mainstream hardware server provides a

On ebay, scalability is one of the major architectural pressures we struggle to fight every day. Every structure and design decision we make can be seen in front of the body. When we are faced with hundreds of millions of users around the world, the number of page views per day is over 1 billion, and the amount of data in the system is computed using a skin byte (1015 or 250)-scalability is a matter of life

basic functionality from thread security, Collections.synchronizedmap allows users who need synchronization to have synchronization, while users who do not need synchronization pay a price for synchronization.The simple approach taken by Hashtable and Synchronizedmap to get synchronization (each method in a synchronous Hashtable or in a synchronized Map wrapper object) has two major deficiencies. First, this approach is a barrier to scalability becau

-for-performance-and-scalability/ Why shoshould you care about the latest "early adopter" release of the InnoDB Plugin, version 1.0.3? ? One word :?Performance!The release introduces these features:Why should you pay attention to the latest InnoDB Plugin 1.0.3? One word: performance! This version includes these features Enhanced concurrency scalability: the "Google SMP patch" using atomic instructions fo

This white paper provides relevant content about scalability in different reporting service implementation architectures. Also provides guidelines, recommendations, and hints based on using Microsoft SQL Server Reporting services to complete your own performance tests. Brief introduction Microsoft®sql server™reporting Services is a reporting platform that includes scalable and manageable central management report servers and extensible web-based, desk

Scalability is a system ' s ability to process more workload, with a proportional increase in system resource usage. In other words, under a scalable system, if you double the workload, then the system uses twice as many system resources. This sounds obvious, but due to conflicts within the system, the resource usage might exceed twice the original workload.Examples of poor scalability due to resource confl