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Overview I. Items to be learned: 2,System functions after Configuration 6,Pre-configuration items should be sorted and summarized 7,The business processes sorted in the early stage are carefully and read one by one to ensure the quality of the business blueprint work. 2. Completed Projects: 3,Stored Procedure1Class --

the local optimal point on the left, but the saddle point on the right. A saddle point can be understood as a maximum point in one direction and a minimum point on the other, which can be imagined as a saddle on horseback.A point with a gradient of 0 in a high-dimensional space may be a convex or concave function in each direction. For example, in 2w space you want the local optimal, all the 2w directions need to be such, the probability is too small. We are more likely to encounter some direct

Build JEESZ distributed architecture 2 -- install Tomcat 7 (Environment preparation) and jeesztomcat7 in CentOs Declaration: Because the runtime environment is based on the Linux system, some preliminary environment preparations are required before the framework is implemented.Many instances of Tomcat 7 are installed in CentOs. As the post-blog serves as the nati

Talking about high concurrency (6) implementation of several spin locks (1) This article implements two basic spin locks: taslock and ttaslock. Their problems are frequent CAS operations, leading to a large amount of consistent cache traffic, resulting in poor lock performance. One improvement of ttaslock is backofflock, which rolls back the thread in case of high lock contention to reduce competition and cache consistency traffic. However, backofflo

, but its redundancy is 0, when the hard disk damage, The data is also damaged. In the production environment of the server, the most used is RAID5 or RAID6, which provides read and write performance, but also provides redundancy. RAID1 are often used in situations where the accuracy of the data is required and strictly.Let's summarize the pros and cons of each of these 4 commonly used RAID levels: RAID level Speed Redundancy of Disk Utilization RAID

13. C # division type and static class (chapter 7, Chapter 2-7.1 ), If you don't find anything big, you will lose it. If you don't remember anything small, you will forget it. Today, I want to write the branch type and static tool class in C #. These two concepts may have been used in our daily use, maybe you think this is not something you should have. Let's review it. The Division type. In my personal und

recently learning CentOS 7 system Management, using the "CentOS 6.X System Management Practical Treasure" a book------because the online purchase of CentOS 7 book has not been sent to O (' '!) o~(1) First install the Webmin using the Yum method:Webmin cannot be installed by default with Yum because the software is not stored on the official site. Although it was

For work reasons, I tried to connect SQL7 to ORACLE and directly access the ORACLE database in SQL7. below I will briefly describe this method. At that time, the slave server was used to directly connect to the peer database. 1. first install the ORACLE client on the SQL Server, and set it. 2. then open ENTERPRISEMANGER, which is the same as yesterday's SQL Server. I tried to connect SQL 7 to ORACLE and dir

core thread pool size. Otherwise proceed to 3. Create a new Work queue (thread, refer to previous section), successfully returned directly, failed to 4. If the thread pool is running and the task joins the thread pool queue successfully, proceed to 5, otherwise 7. If the thread pool is closed or the thread pool size is 0, make 6, otherwise return directly. If the thread pool is closed, the

, using self and _ in the implementation code of the method. Cmd These two parameters can be called to receiver and selector.So why is it that when we write code for a method, we use "self" to invoke the object directly to the method call, which is passed in through this process;(6), in order to improve the speed of sending messages, each time you look up a method call table, you will find a class of cache (see previous

1 DOCTYPE HTML>2 HTML>3 HeadLang= "en">4 MetaCharSet= "UTF-8">5 title>title>6 Head>7 8 Common directives (ii)9 * Ng-class: Dynamic reference defined style {aclass:true, bclass:false}Ten * Ng-style: Dynamically referencing the style object specified by JS {color: ' red ', background: ' Blue '} One * Ng-click: Tap Listen, value is function call, can pass $event