srp outage

English Original:Top 6 Refactoring Patterns to help your Score 80% in Code Quality In the past to do a lot of code in the daytime, found some code quality more common problems, the following is the top five : bloated class :Classes are bloated because developers lack the understanding of the most basic coding principles, the "single Responsibility Principle" (SRP). These classes tend to become bloated because different and functionally missing methods

This section explores the elasticjob failover mechanism. We know that Elasticjob is a distributed task scheduling framework based on quartz, where distributed data is distributed, and the core design concept of elasticjob is that a task executes on multiple nodes, and each node processes part of the data (task pending data shards). If a task node is down, and a task is scheduled, a portion of the data will not be processed, in order to solve the task node downtime caused by the task of a schedul

tracking 823.2.2 Monitoring configuration file format--The power of a space 84Configuration of the TAF in the 3.2.3 RAC 88Configuration of scan in 3.2.4 RAC 903.2.5 simulating a RAC connection with a single-case mode 933.3 Reasons why the listener cannot start 94Diagnostic case: Use Strace to analyze TNS-12543 case 964th. Database start/stop and outage issues4.1 Database Start-Stop problem analysis 994.2 Database failed to start case 100Diagnostic ca

write itself page break will there be a problem?Before it can manipulate the page, the state before the database is recorded is consistent. At this time the page problem, itself will not go to write, there will be no problem. Has the recent data been overwritten?Because we know only 2 m of space, so will always overwrite to write. Performance issues?We know that the double write has been written two times. Does this have to do with our operation two times? We know that it has a cache sp

0. Overview:In general, in order to improve the game speed, the online player's data will be cached in memory. If there are data updates, only the cached data in memory is updated, rather than updating the database directly. The cached data is periodically written back to the database (for example, 5-minute writes). When the server goes down, all the data from the last database update to the outage will be lost, the so-called back file. This part of t

Computer enthusiasts friends in the process of using the computer, will inevitably encounter a lot of sudden failure, the cause of these failures may be the cause of the software, may also be caused by hardware failure, or other factors ... So how do our junior computer users respond to these events, and don't panic, see below: Suffer a power outage Phenomenon Analysis: This is a sudden "power failure" caused. The voltage fluctuations generated by t

This morning, there was a massive outage in Windows Azure China Data Center (Shanghai), which is still not fully functional. Post one of the most serious downtime events since Windows Azure landed in China.Domestic and foreign major public cloud vendors have been down, and each outage event in the industry caused a public cloud security controversy. Public cloud vendors will not hesitate to seize every

2015-01-12 Zhang Xiaodong Oriental Cloud Insight650) this.width=650; "class=" Rich_media_thumb "id=" Js_cover "src=" http://mmbiz.qpic.cn/mmbiz/ EAZBLLCAHYAUCSH1JG41MOAAUOOWDIBTZDBBZLBANNCBMNJVIAPPIB0HLC1HO5HFZCYCICIA35YXWAICM4L4ALSMLU9G/0?TP=WEBP "Style=" margin:18px 0px-6px;padding:0px;border:0px;width:698.181823730469px;height:auto; "alt=" 0?tp=webp "/>Brief comment on The reliability and sustainability of cloud services are the two most important indicators, and Verizon's 2-day downtime has

algorithm is that fault tolerance and extensibility are not good. Fault tolerance refers to whether the whole system can run correctly and efficiently when one or several servers in the system become unavailable, and extensibility refers to whether the whole system can run correctly and efficiently when a new server is added.Now assume that a server is down, in order to fill the vacancy, to remove the outage server from the numbered list, the followi

, immediately the network VIP and the intranet VIP bound to Server2, and the server2 of MySQL switch to the main library. At this time because the outside VIP has been transferred to the Server2,web request will be sent to Server2 Nginx. Nginx detects a server1 outage and no longer forwards the request to the Server1 php-fpm. After the SQL request as usual sent to the local Atlas,atlas write operation sent to the intranet VIP, read operation sent to S

OpenSSL updates nine Security Questions 06-Aug-2014: Security Advisory: nine security fixes Https://www.openssl.org/news/secadv_20140806.txt OpenSSL 0.9.8 DTLS users should upgrade to 0.9.8zbOpenSSL 1.0.0 DTLS users should upgrade to 1.0.0n.OpenSSL 1.0.1 DTLS users should upgrade to 1.0.1i. OpenSSL TLS Protocol Downgrade Attack (CVE-2014-3511)========================================================== ==================Defects in OpenSSL SSL/TLS server code may cause server negotiation.The Clien

understand: Single Responsibility Principle (SRP): 1. Definition of SRP (Single Responsibilities Principle): For a class, there should be only one reason for its change. In short, there is a single function. 2. If a class has too many responsibilities, it is equivalent to coupling these responsibilities together, A change in responsibility may weaken or restrain this class from fulfilling other responsibil

Without violating the single-Responsibility principle (SRP) , to be as thin as possible on the interface, violating the SRP would result in a single module exposing too many methods ( the methods in the interface are Publi), and many of the internal interfaces of a single function are exposed. Interface High cohesion High cohesion : improve the processing power of

. The communication between the model layer and other parts of the MVC triad should happen only through Services. The clear separation has a few additional benefits: It helps to enforce the single responsibility principle (SRP) Provides additional ' wiggle ' in case the logic changes Keeps the controller as simple as possible Gives a clear blueprint, if you ever need an external API The easiest-sure, both View and Contro

+ECDSA+SHA256 EECDH+aRSA+SHA384 EECDH+aRSA+SHA256 EECDH+aRSA+RC4 EECDH EDH+aRSA RC4 !aNULL !eNULL !LOW !3DES !MD5 !EXP !PSK !SRP !DSS"SSLHonorCipherOrder on;Nginxssl_protocols SSLv3 TLSv1 TLSv1.1 TLSv1.2;ssl_ciphers "EECDH+ECDSA+AESGCM EECDH+aRSA+AESGCM EECDH+ECDSA+SHA384 EECDH+ECDSA+SHA256 EECDH+aRSA+SHA384 EECDH+aRSA+SHA256 EECDH+aRSA+RC4 EECDH EDH+aRSA RC4 !aNULL !eNULL !LOW !3DES !MD5 !EXP !PSK !SRP !DS

Always think that the class in the program is used to encapsulate the inheritance polymorphism is object-oriented design, is notencapsulation, inheritance, polymorphism is only the three main object-oriented features, but in the design of the program is not to say that the structure of the class used (or reflected) these three properties are object-oriented,In fact, the real object-oriented design is to meet the following five principles,five basic principles of object-orientedSingle responsibil

. By the way, the letter "O" in solid refers to the principle of open/close design.Single-duty principle Responsibility Principle (SRP)The single principle of responsibility is another solid design principle, and the letter "S" in solid refers to it. According to the SRP, the reason for a class modification should be one or the other, or a class should always implement a single function. If you implement mu

Atitit. Several rules, laws, and principles of software development principle V31.1. Revision History 22. Design pattern Six Principles 22.1. Design pattern Six principles (1): Single Duty Principle 22.2. Design pattern Six Principles (2): Richter Replacement Principle 22.3. Design pattern Six Principles (3): Dependency Inversion Principle 22.4. Design pattern Six principles (4): interface Isolation principle 22.5. Design pattern Six principles (5): Dimitri Law 22.6. Design pattern Six principle

five basic principles of object-orientedSingle responsibility principle (SRP)Open closure principle (OCP)Richter replacement principle (LSP)Dependency inversion principle (DIP)Interface isolation principle (ISP) Single Responsibility principle (SRP) • A class should have only one reason for it to change (simplest, easiest to understand and least likely to be a design principle)Employee Class Examples:For ex

in the use of object-oriented thinking system design, the predecessors summed up a total of 7 principles, respectively, are: Single duty principle, open and close principle, Richter replacement principle, Dependency injection principle, interface separation principle, Dimitri principle and priority use combination rather than inheritance principle. 1. Single responsibility principle (SRP) The core idea of a single responsibility