rdbms concepts

group ASM and RDBMS is set11.2. The figure shows the extent. BeforeThe size of extent is 1 m and 1 * Au. For the next 20,000 extent set, the size of extent is 4 MB, which is equal to 4 * Au. In Figure 1-5, the file uses 128 K small blocks (with ...... X is a tag), and each 128 K small block is stored in an extent, starting from the first extent in Disk 1, followed by the first extent in Disk 2, then it is distributed cyclically on all disks until the

Directory: [C # tips] C # some confusing concepts -------- data type storage location, method call, out and ref Parameters [C # tips] C # some confusing concepts (ii) -------- constructor, this keyword, partial classification, enumeration [C # tips] C # some confusing concepts (iii) -------- structure, GC collection, static members, static class [C # tips] C # s

Last week took an amateur time to see the redux, just beginning a little uncomfortable, a bit in the action, Reducer, store and middleware so many new concepts.After some understanding, found that Redux's one-way data in the pattern is relatively easy to understand, combined with the redux one-way data flow model, many concepts are relatively clear.The following redux in accordance with their own understanding of the relevant content, if you have just

Guide to cainiao installation-concepts that can be remembered after you have heard of the linux Kernel I plan to share it with our department. We found that some bottom-layer knowledge is stuck in one sentence. For example, we heard that JVM uses-XX:-UseBiasedLocking to cancel biased locking to improve performance, because it is only applicable to non-multi-thread high concurrency applications. Use the Digital Object cache-XX: AutoBoxCacheMax = 20000-

2014-07-26 BaoxinjianI. Basic concepts of Oracle Architecture 1. Oracle's overall architecture is divided into three parts The first part: System Global Area (SGA) Part Two: program Global zone and background process Part III: Oracle's Files 2. From functional angle to those division Storage structure Includes: Control files, data files, and log files Role: These files form the physical storage str

1. One of the concepts of WebSphere Learning notesRecently, because of the need to use WebSphere work, after work to properly learn the middleware bar. Today, look at some concepts and the architecture of WebSphere itself.L WebsphereConcept from Baidu Encyclopedia: WebSphere is IBM platform . It application platform such as servers, services, and tools. websphere software The WebSphere

list elements, can generate child rows for placing child elements.There are three situations that will cause elements to flow out of the document, floating, absolute positioning, fixed positioning. But floating elements in IE also exist in the flow of documents (which makes me feel reasonable >Floating elements do not account for any normal flow of documents, and the positioning of floating elements is based on a normal flow of documents, then extracted from the document stream and moved as far

After the Declaration and operation of pointers in the previous article, this article describes several common and important pointer concepts.I. pointer constants and constant pointers These two concepts also exist as follows. Like two connected words, the first word is a modifier, and the latter is a central word. Constant pointer, which is a pointer to a constant. A constant Pointer Points to a constant to prevent the update of a constant from inc

list elements, can generate child rows for placing child elements.There are three situations that will cause elements to flow out of the document, floating, absolute positioning, fixed positioning. But floating elements in IE also exist in the flow of documents (which makes me feel reasonable >Floating elements do not account for any normal flow of documents, and the positioning of floating elements is based on a normal flow of documents, then extracted from the document stream and moved as far

I write binder and WLAN related topics, which is easier for me. After all, this is what I do. The binder is probably the most complicated thing in Android. In this section, I will talk about some basic concepts first. To lay a foundation for the future. Start with the question. WLAN includes the following basic concepts: Wireless Network ProtocolWPA/wpa2WLAN and WiFi I personally think that before learning

1. C # differences between classes and interfacesThe interface is responsible for defining functions. The project uses interfaces to define the concepts of classes, Operation classes, and abstract classes!The class is responsible for the specific implementation of the function!There are also abstract class definitions in the class. The difference between the abstract class and the interface is:An abstract class is an incomplete class. The class contai

I have been engaged in project management for some time. I always want to organize related concepts, processes, methods, work and related experiences in project management! I can't write it down for a long time. Then I will read the fifth version of PMBOK and summarize the related concepts in project management. First, I will be able to deepen my impression, and second, I will be able to facilitate subseque

Tags: basic concepts of openstack neutron Openstack-install-guide-yum-icehouse.pdf/7. Add a networking service/networking concepts Openstack's Neutron can manage Virtual Network Infrastructure (vni) and physical network infrastructure (PNI) in the openstack environment ). Openstack's Neutron allows tenants to create virtual network topologies, including services such as firewalls, Server Load balancer, and

Understand some hardware-related concepts in Embedded Development for embedded system development. Embedded development requires a certain understanding of digital circuits and analog circuits. In this way, in-depth research can be conducted. Next we will briefly introduce some hardware-related concepts in embedded development. ---- Level) In digital circuits, high voltage and low level are divided into 1

Developing High-Performance concurrent applications is not an easy task. Examples of such applications include high-performance Web servers, game servers, and search engine crawlers. Such an application may need to process thousands of requests at the same time. For such applications, the multi-thread or event-driven architecture is generally used. For Java, thread support is provided within the language. However, Java multi-threaded application development may encounter many problems. First, it

and new intertwined, Mutual Assistance (occasional fights are also normal ). What we need to do is to coordinate the relationship between the new and old systems. This coordination process is the process of solving problems using SOA.Core concepts support heterogeneous (heterogeneous) Do not expect every system in the enterprise to be a Java platform, do not expect every system in the enterprise to run on the window platform, do not expect the databa

Content Guide Overview What happens behind a variable when you declare it? Heap and Stack Value types and reference types What are value types and which are reference types? Packing and unpacking Performance issues for boxing and unpacking I. OverviewThis article explains six important concepts: heap, stack, value type, reference type, boxing, and unpacking. This article begins by explaining the changes that occur

There are several concepts in the ServiceContainer and ServiceProviders sections of Laravel document: laravel. comdocs5.2providerslaravel. comdocs5.2container1. What is bootstrapping? It seems that the reflection mechanism is used for the... Laravel documentation. Service Container, Service ProvidersThe two sections have several concepts that are hard to understand: Https://laravel.com/docs/5.2/providers Ht

There is no systematic study of mathematical optimization, but these tools and techniques are commonly used in machine learning, and the most common optimization in machine learning is convex optimization, which can refer to Ng's teaching materials: http://cs229.stanford.edu/section/ Cs229-cvxopt.pdf, from which we can understand some of the convex optimization concepts, such as convex set, convex function, convex optimization problem, linear programm

Some descriptor-based concepts in python (I) 1. Preface 2. New and classic categories 2.1 built-in object Methods of the 2.2 class 2.2.1 static method 2.2.2 Class Methods 2.3 new style class) 2.3.1 _ init _ Method 2.3.2 _ new _ static method 2.4. New Class instances 2.4.1 Property 2.4.2 _ slots _ attributes 2.4.3 _ getattribute _ Method 2.4.4 instance method