architecture learning books

://s3.51cto.com/wyfs02/M01/70/C9/ Wkiom1w-iyibuzlmaafbw46vpsq757.jpg "/> The user commits a transaction and will generate some redo record in redo buffer. LGWR reads the Redo record from log buffer and writes it to the online Redo Logs, while awaiting confirmation from the LNS process. LNS reads the same redo record from redo buffer and transmits it to the slave library via ONS. RFS receives the log and writes it to standby Redo Logs. When the RFS log succeeds, a confirmation si

JAVAEE learning-struts2_01: introduction, setup, architecture, configuration, action class details and exercises: customer list, javaeestruts2_01 I. What is struts2? 1. Concept 　　 2. Advantages and history of struts2 　　 2. Build the struts2 framework 1. Import package (Unzip) The struts2-blank.war will see 　　 2. Write Action class public class HelloAction { public String hello(){ System.

Solr learning Summary (7) Overall Solr search engine architecture, solr Search Engine After some efforts, I finally summarized all the solr content I know. We have discussed the installation and configuration of solr, the use of web management backend, the Query parameters and Query syntax of solr, and the basic usage and Query, Facet, of solr client solrnet, highlight and other common methods in actual de

:(1)./common Directory: The class library can be used by both the Tomcat server itself and all Web applications.(2)./server Directory: The class library can be used by the Tomcat server itself and is not visible to the application.(3)./shared Directory: The class library can be used by all applications and is not visible to the Tomcat server itself.(4)./webapp/web-inf Directory: Class libraries can only be used by applications and are not visible to other applications and Tomcat servers.The clas

1.LSM Framework (Linux secrity Module) It is a lightweight access control framework for a variety of access control models implemented in the form of kernel loadable modules. The user can choose the appropriate security module to load onto the Linux kernel. Its design idea, in the case of the minimum change of kernel code, provides a structure or interface that can implement mandatory access module selection yo. The LSM framework allows the security module to be loaded into the kernel as a plug-

At this qcon conference, the topic "the development course of Douban.com technical architecture" is almost the most important. After listening to the speech, we will find that Douban is also a bit of a detour in the development process. These are valuable treasures in the development process of the website. They can take out some of their best practices, is a valuable thing. Although Douban has revealed a lot of architectural details, it will not (or

Original: C # Learning Series-. NET Architecture. NET Framework OverviewThe. NET framework is. NET applications run to provide a virtual machine environment that provides compile, run, memory management, garbage collection, security, and other services for. NET applications.?. NET Framework Components1. Common language Runtime (Common Language RUNTIME,CLR)The 2.NET Framework class library (not all class lib

The architecture of learning -5-20170523-mysql in mysql-optimization classMySQL is divided into three-storey structuresThe last two are connections that can be used in WindowsMysql-hlocalhost-uroot =socket WayMysql-h127.0.0.1-uroot =TCP/IP WayMysql-h192.168.1.1-uroot =TCP/IP WayThe connection is blocked:Modify the configuration of the number of connectionsCommand:SQL Layer:Ability to open QC in a purely rea

. These heterosexual friends are actually an aggregation. Therefore, if you stand in the woman's perspective, she and the man is related to the relationship, if standing in the opposite sex friends, the woman is just one of the male heterosexual friends, the woman and the opposite sex friend is the aggregation relationship. This also shows that the relationship is actually relative. Next, the two sides ended up in love, fell in Iove, and finally walked into the halls of marriage, forming th

respect to Mysql-proxy are:1. Rewrite all LUA code in the main process with C and LUA only for the management interface;2. Rewrite the network model, threading model;3. Realize the connection pool in the true sense;4. The lock mechanism is optimized and the performance is increased by dozens of times times.Internet companies mostly use the database is MySQL, want to stand out from the many IT workers, need to have advanced technology, learning to add

I have synchronized it from my independent blog and discussed it together Copyright Disclaimer: non-commercial reprinting, retaining the integrity of the original content, and signing the author Wang Guofeng and the original text link Preface In the previous article, I forcibly broke up the lovers of web servers and image servers. This may be a bit unfriendly, but it will definitely be good for their future development. In the near future, they will thank me. Now, let's go back to today's topic.

Article title: Exploring Linux kernel virtual machines-learning the KVM architecture and its advantages. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source. Linux has both good flexibility and excellent virtualization. However, with the emergence of kernel virtual machines (

suitable for hadoop MapReduce job parallel batching hbase table dataHBase Shell,hbase's command-line tool, the simplest interface for hbase management useThrift Gateway, using Thrift serialization technology to support multiple languages such as C++,php,python, to access hbase table data online for other heterogeneous systemsRest Gateway, which supports the rest-style HTTP API to access HBase, lifting language restrictionsPig, you can use the Pig Latin streaming programming language to manipula

binary dataHLog File　　The Hlog file is an ordinary Hadoop Sequence file,sequence The key is the Hlogkey object, the Hlogkey records the attribution information written to the data, in addition to table and region names, but also includes Sequence number and Timestamp,timestamp are "write Time", the starting value of sequence is 0, or the last time the file system was deposited in sequence.The value of HLog sequece file is the KeyValue object of HBase, which corresponds to KeyValue in hfile　　Con

generations accounted for the memory size of-xmx corresponding to the value minus-xmn corresponding value. 5. Program counteris the smallest piece of memory area, its role is the current thread executes the byte code of the line number indicator, in the virtual machine model, the bytecode interpreter works by changing the value of this counter to select the next need to execute the byte code instruction, branch, loop, exception handling, Basic functions such as thread recovery ne

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I believe that the MVC three-tier architecture has been familiar with the gray, in this is not detailed, the individual feel SSI frame structure or more typical MVC three-tier architecture, or relatively easy to start. About the introduction of this piece I would like to particularly thank the next Frankhui children's shoes, with his help, I can quickly familiar with the structure, the framework of my

-information of Rman backup is recorded show parameter spfile; -- pfile and SPFile convert each other Create pfile='/home/oracle/pfile.ora'from spfile ; -- Storage location dump; (*) Logical storage structure Tablespace: A table space can have multiple data files Segment segment: A table is a segment, a table segment, and an index segment Zone extent: the smallest unit of allocated space Block: Minimum storage unit 8k -- the size of the Block Show parameter db_block_size; (2) Process st

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database parameter file from SPFile or pfile, then assign the SGA and create a background process.The equivalent of the production line and the workers are in place, but no production started, no products on the production line. The Mount State establishes the relationship between the database and the instance.First, according to the Control_file parameter in the initialization parameters file, find the corresponding control file and then open them, in the control file contains the database dat