way after optimization" Local keys = Redis.call (' Keys ', argv[1]) for I=1, #keys, and do Redis.call (' del ', Unpack (keys, I, Math.min (i+4999, #key s)) End return #keys"'volume:*'Comments:In fact, the second way of improvement, one-time unpack too much will be wrong, then simply once 5000, so there will be no problem!The meaning of this script is to first define an array of keys, which stores all of the pattern matching keys with ' Volume: ', and
of changeKey milestones publish progress reports and demos of packagesRisk Control (★★★☆☆)Outsourcing personnel Change RiskTechnical risk of receiving outsourcingMeet the outsourcing demand to grasp the riskCommunication and Communication (★★★★☆)Establish a unified code management systemSet up recurring meetings, such as milestones, conference, monthly meeting, etc.Weekly report on progress, available via emailSet up QQ group to communicate at any time, you can report the completion of daily an
For the xml2ddl project, Freshmeat.org provides a complete set of Python programs based on the GNU or GPL general public permit. In a running Python environment, this tool can work on many control systems, including Windows, Linux, and UNIX platforms,
For the xml2ddl project, Freshmeat.org provides a complete set of Python programs based on the GNU or GPL general public permit. In a running Python environment, this tool can work on many control systems, including Windows, Linux, and UNIX platfor
Key points for developing large-scale and high-load website applicationsAuthor: maid
Source: http://www.phpchina.com/bbs/thread-15484-1-1.html
After reading some people's so-called large projects, I feel a little uncomfortable without talking about ideas.I also talk about my own views. I personally think it is difficult to determine whether a project is large or not,Even a simple application is a challenge
Key Points of flight game program design
1. Map 1.1 levelsIf the game is completely played on the first layer, it will be boring. Therefore, it is necessary to level the game. There are tanks and some turret on the ground, and there are enemy planes rushed out from time to time in the clouds, and the top layer is the main body of the game screen, a large number of enemy planes!Therefore, the game should be
stored with raw data, secondary index is stored separately and a pointer to primary key. So just count (*) uses secondary index scans faster, while primary key is primarily useful for scanning indexes while returning raw data. InnoDB implements the following two types of row locks. Shared Lock (S): Allows a transaction to read one line, preventing other transactions from acquiring an exclusive lock on the
Pymalloc, while large objects use the system malloc.The different types of objects, such as integers, floating-point numbers, and lists, have their own private pools of memory that are not shared between objects.Second, try...except...except ... [Else ...] [Finally ...]Python first attempts to execute a try-under statement:If the exception, and a number of except to match the exception, and execute the matching except statement, if all do not match the exception will be passed to the top-level
device zookeeper will synchronize the transaction to the storage device. If the storage device is not dedicated, but shares the same disk with other I/O-intensive applications, Zookeeper efficiency will be caused. Because the client requests a change to the znode data, Zookeeper writes the transaction logs to the storage device before the response. If the storage device is dedicated, the performance of the entire service and external applications will be greatly improved.
Znode stores a large a
12 key points of Google SEO optimization technology, googleseo
1. Select the region where the server is located
ForGoogleFor different regions, the search results are different. some English keywords, you search by Google in China, and found that your website is not top in the rankings, but if you use Google abroad, you may not be able to find your website on dozens of pages.
The ranking result of our Googl
This article mainly introduces the secondary development points and examples of Drupal7form, and solves the problem of jump after submitting a frequently used Form. if you need it, you can refer to Drupal
Remember to add this article to favorites. when you perform the Drupal 7 M module, you will often use the form jump or overload.Three key points are summarize
This article introduces 12 key points for C/C to compile a portable program:1. Hierarchical Design to isolate the Code related to the platform. Just like testability, portability also needs to begin with design. In general, the top and bottom layers do not have good portability. The top layer is GUI, and most guis are not cross-platform, such as Win32 SDK and MFC. The lowest layer is the operating system AP
=requestmethod.get) Publicstring show3 (@PathVariable string id) {SYSTEM.OUT.PRINTLN ("SHOW3" +ID); return"Test/index"; }5. (1) can be done by Bean-validator.jar to SPRINGMVC server Check, check @validated menu menu, bindingresult br parameters must be written together @NotEmpty (message= "menu list cannot be empty") public String getmenuname () { return menuname; }(2) Springmvc upload a file requires Commons-io-2.2.jar, Commons-fileupload-1.3.1.jar two jar packageThe bean code
Register PA 001111 and PB 111000, two pages, if the use of LRU, then eliminated is PA, If use LFU then be eliminated is Pb).
Page buffer algorithm PBA: When the replacement page, whether or not modified, is not replaced by the disk, but first persisted in the memory of the page linked list (modified page linked list and unmodified page list, can not be differentiated) inside, when it is accessed again when it can be directly from these linked list out without disk IO, Write disk operations
Some time ago, group buying websites were very popular, but at present, group buying has entered a card-washing period. Many group buying websites will collapse or merge in the near future.
Although there are already many group-buying navigation websites on the market, it took a week to build a group-buying navigation website. The key is the content and page logic. CSS does not pay too much attention. I am not very familiar with this CSS.
E-commerce from the public more and more near, online business is more and more optimistic about how to do a good job in E-commerce, the author based on practical experience, think that there are a number of points:
First, to obtain customer trust.
This is the primary solution to E-commerce, because online business is the same as offline business. How to get customer trust is the key.
To obtain customer tr
this way, such as jquery slideup animation, it is set elements of the Overflow:hidden, and then through the timer, constantly set the element height,margin-top, The Margin-bottom,border-top,border-bottom,padding-top,padding-bottom is 0, which achieves the slideup effect.
Other Brain hole methods
Set elements position and left,top,bottom,right, etc. to move elements out of the screen
Set the position and Z-index of the element and set the Z-index to a small negative number as l
article
In this article, I'll refer to the word "service" many times, not as a remote service (rest or other), but rather as a service object--where you often place business logic implementations--that are responsible for executing business rules and defining business transaction boundaries.
Of course, your code base may use different names, depending on the design pattern you use to create the application architecture. Therefore, what I call "service" may also be called "Workflow (Workflow)",
)
clock offset = [(T4+T1)-(T2+T3)]/2 (add a coefficient k yourself, representing the difference between the client and the server, the formula is easy to launch)
other key technical points
volatile
Prevents the compiler from optimizing the code, and for variables declared with this keyword, the system always reads data from its memory and does not use backups in registers. Used in Atomic.h.
__thread
__t
Whether it is the traditional business era or the Internet electric Business era, improve the user's ultimate experience is to achieve the marketing profit goal of an important action. For the electrical business, the core and goal of web design is to take the user as the center, the pursuit of the ultimate user experience, and the completion of its own carrying the business or user aspirations and other goals.
In the internet age, there are nine key
from.MySQL optimized "three minus one plus"User centralized access is the Internet in the field of "high incidence", in the face of high concurrency environment, Wu Bingxi teacher proposed: three minus one plus policy. Reduce data access, reduce network traffic, reduce CPU overhead, and increase resources."Military" for efficient index designDesign efficient Indexing
Query, update, delete the Where condition must have an index, the number of rows can not exceed 1w
The index cannot
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