technical analysis for dummies

and there is a high risk. In addition to vertical scaling, we choose horizontal scaling, that is, adding servers, unlimited performance expansion, of course, there are a lot of content in it. How to back up and synchronize databases is a problem that needs to be considered and solved, in addition, we also need to consider the problem of data duplication between so many machines. In addition, it is possible to cache the database to memcached or use mysql proxy to implement connection pool and ot

of the current virtual processor/Vmx_preemption_timer_value = 0x0000482e,Guest_pending_dbg_exceptions = 0x00006822 ,/Pending debug exceptions/ Host-state region FieldHost_rsp = 0x00006c14 ,/Stack pointer/Host_rip = 0x00006c16 ,/Command pointer//Control Register/Host_cr0 = 0x00006c00,Host_32a = 0x00006c02,Host_cr4 = 0x00006c04,/Segment Selection Register/Host_es_selector = 0x00000c00,Host_cs_selector = 0x00000c02,Host_ss_selector = 0x00000c04,Host_ds_selector = 0x00000c06,Host_fs_selector = 0x00

"WCF Technical Analysis (Volume 1)" Since the publication of nearly 20 days, has been the garden of friends and the vast number of WCF enthusiasts alike, and the Network of Excellence Computer Bookstore as the home recommended, here for the support of everyone to express our gratitude. At the same time I will always adhere to this blog series, and share my knowledge of WCF and learning experience. In the "m

Label:Oracle's hints feature is a relatively strong feature and is a complex application, and hints are only a recommendation to Oracle, and sometimes Oracle may not follow the prompts for cost considerations. According to the practical application, the developer is generally not recommended to apply the Oracle hint, because each database and server performance is not the same, it is likely that one local performance improved, but the other place is down, Oracle in the SQL to perform the

Implementation and technical analysis of the verification code generated by js I will share with you a piece of code for generating and verifying the verification code in js. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 As we all know, JavaS

) elements are properly nested8, valid XML in addition to satisfy the XML specification, but also to meet the corresponding DTD and schema definition of the element rules; Valid XML must be well-formed, but well-formed XML is not necessarily valid.9. DOM parsing: API based on tree structure; the entire XML document must be parsed and stored in memory; The client application can access the objects randomly; large documents can cause memory tension.10. Sax provides an event-driven model for parsin

Brother Lian Blockchain technical training Fabric 1.0 Source Code Analysis (chaincode) Peer #peer Command and Sub-command implementation # Fabric 1.0 Source Notes Peer #peer chaincode Command and Sub-command implementation # 1, Peer Chaincode Install sub-command implementation (installation chain code) # # 1.0, Peer Chaincode Install sub-command overview Peer Chaincode installs the source code and enviro

Brother Lian Blockchain technical training Fabric 1.0 Source Code Analysis (48) Fabric 1.0.4 Go Code volume statistics # Fabric 1.0 Source Code Note Fabric 1.0.4 go Code volume statistics # 1, overview In addition to test, vendor, mocks, example, Protos, go core code file 341, the core line of code 63433 lines. "' Bash Find./|grep-ve ' Test|vendor|mocks|example|protos ' | grep ' \.go$ ' | Wc-l 341 Wc-l ' F

In-depth analysis of php template technical principles [1 ]. 1. before the template technology is available, use PHP to develop programs. generally, php code and html code are mixed together. For example, the news list may be a newslist. php page 1. The origin of the template Before using the template technology, PHP development programs are usually compiled together with php code and html. For example, the

shutting down a network connection that is the same as a user's network connection, locate the user if(KV. Value = =connection.ConnectionInfo.NetworkIdentifier) {Tempuserid=KV. Key; Break; } } if(Tempuserid! ="") { //if the found user ID is not empty, the item is removed from the user dictionary if(Usermanager.containskey (Tempuserid)) {//When

"White and black" is a popular term for DLL hijacking technology. Nowadays, many malicious programs use this hijacking technology to bypass the active defense of security software to load themselves, it is currently a fire-free method. This article will provide a brief technical introduction and case study on such viruses. The so-called "white and black" generally refers to "White exe" and "Black dll". "White exe" refers to a normal exe file with a di

. Resource occupation: CPU resources are greatly occupied, and the system becomes slower and slower.7. Cause the browser to crash: the rogue software often causes the browser to crash inexplicably due to the trust of the browser.8. Interfering with software: rogue software always interferes with the normal operation of anti-virus software, which causes inexplicable errors to these software to survive for a long time. Related Articles] Rogue software product: a good tool to clear rogue software

In the previous article, we have briefly introduced the basic concepts of wireless UWB technology. Now, based on the wireless UWB technology, I will give you a detailed analysis of its principles. Hope that you can find the information you need. Technical Principles of wireless UWB The most basic principle of wireless UWB technology is to send and receive pulses with strictly controlled intervals between

[Note: to prevent the spread of malicious samples, replace {BLOCKED} with some information in the article.] Overview Recently we captured a number of attacks using Adobe Flash Vulnerability (CVE-2014-0502), the attacker on a technical blog in China "www. java {BLOCKED }. com "implanted malicious code. The page implanted with malicious code is as follows:The SWF file specified on this page is used in a loophole. After successful use, a segment of sh

See this article: http://mt.sohu.com/20160806/n462923089.shtml"More than 10-year technology Daniel tells you, these new Java technology must not be missed"Although speaking more general, but the inside mentioned Callback Hell, Promise, Future, Actor, Akka, Kafka, usually have heard, how to combine these together, is a science.After the combination, the refinement, rise to the level of sharing can be a learning.can go deeper."Todo" Java New technology Learning note-from a

vulnerability, you only need to filter the "." In the return value when calling Zipentry.getname (). /"Jump character .For the reference of the third-party zip library also need to be aware that the above test case can be used to test whether the third-party library has a zip decompression vulnerability;When calling Dexclassloader dynamically loading Dex, the second parameter is not specified on the sdcard;Specify allowbackup= "false" in manifest to prevent the app data backup from overwriting.

the user to the user's browser, we will use the cookie, but it can save 4K data.Ways to write cookies1 Public Static voidWritecookie (stringStrName,stringstrvalue)2 {3HttpCookie cookie =Httpcontext.current.request.cookies[strname];4 if(Cookie = =NULL)5 {6Cookie =NewHttpCookie (strName);7 }8Cookies. Value =strvalue;9 HttpContext.Current.Response.AppendCookie (cookie);Ten}View CodeWays to read cookies1 Public Static stringGetCookie (stringstrName)2

=NewRegExp ("^ (?:( [+-]) =|) ("+ Core_pnum +") ([a-z%]*) $ "," I " ); varWidth= ' 100px '; Alert (Width.match (Rnumsplit));//[' 100px ', ' + ', ' px ']Alert (Width.match (RNUMNONPX));//NULL varAa= "+=100.12"alert (rrelnum.exec (AA));//[' +=100.12 ', ' + ', ' 100.12 '] var core_pnum =/^[+-]? (?:\ d*\.|) \d+ (?: [ee][+-]?\d+|) $/; // var num1=1.0034e-18; Alert (Core_pnum.exec (NUM1))// var num2=43.12 alert (core_ Pnum.exec (num2))//43.12 var num3=

placed in the following fixed places, all of which are directories of sogou input method, saving you the need to download the package next time. You can search for files like sgim_sehelper.bin in the red-winning path, which are the installation packages of sogou Browser: Amp; lt; IMG src = "http://image.3001.net/images/20141030/14146515736871.jpg! Small "Title =" 04.jpg"/ amp; gt; amp; lt;/P amp; gt; Step 3Simulate user clicks to install sogou Browser. Sogou in explorer. IME will downlo

the need not worry about releasing the lock problem. The sample code is as follows:My_scope_lock is a template class that implements a local lock.LockType abstract represents a specific lock class. Implements the Mutex_lock class based on a mutex.TemplateWhen used:Mutex_lock M_mutex_lock; My_scope_lock L_lock (M_mutex_lock);We can introduce a lot of such examples according to the above example class. It's easy to forget to close files when reading and writing files, and if you borrow RAII tech