Introduction to the proxy mode and the JavaScript Design Mode
Proxy mode description
Note: As the name implies, a class is used to replace another class to execute the method function. This mode is similar to the decoration mode. What's different is that the proxy mode is used to replace the class of the client initialization object to be proxy, the decoration mode is implemented by using interfaces or parameters referenced by the initial decoration.
In dynamic object-oriented language, the pr
Token-based authenticationany application can authenticate and use any feature in the application as an API. For example, you can create a mobile application that consumes the same API. In this section, we will demonstrate the use of the API (Google Chrome extensions) from Postman. CertificationsWe recommend that you disable two-factor authentication for users who are using Remote authentication. Otherwise, the client should implement two factor authentication processes. We assume that yo
provide additional services to OpenStack. The two most important features are user authentication and what the user is allowed to do, another feature is cataloging the service, what services are available, and what their access points are.Basic conceptsThe core concepts of Keystone include: User, Project (tenant), Domain,token, role, service, endpoint, etc., V3 version renaming V2 version of tenant to proj
.
AVCaptureVideoPreviewLayer: The camera captures the preview layer, can view the photo or video recording effect in real time, create the object needs to specify the corresponding Avcapturesession object, because avcapturesession contains video input data, video data can be displayed.
AVCaptureSession:协调输入与输出之间传输数据
System function: can operate hardware equipment
How it works: Let the app and the system generate a capture session, the equivalent of the app and the hardware
communicate with the mediator through the reference.4, Concretecolleague (Specific colleague Class): It is a subclass of abstract colleague class; Each colleague object communicates with the intermediary when it is necessary to communicate with other colleague objects, and indirectly through the intermediary to complete communication with other colleague classes. The abstract method that is declared in the abstract colleague class is implemented in the specific colleague class.V. Use-case learn
user or group
Authentication Service Components
Service Portal: Like Nova, swift and glance each OpenStack service has a specified port and a unique URL, which we call the portal (endpoints).
Location: In a data center, a location specifically specifies a physical location. In a typical cloud architecture, if not all services have access to distributed data centers or servers, they are also called locations.
User: Keystone Authorized Consumer
Translator Note: On behalf of an individual, op
Razuna is an Open-source digital media asset Management (Digital Asset Management) system written in the Java language. is powerful and can be used to manage digital media resources in a variety of formats.
The installation configuration of Razuna in this machine is still more complicated. Mainly because of the need to deal with a variety of formats of video, audio, graphics and other media formats. Therefore, many video and audio processing programs need to be installed.
Installation process f
In the OpenStack grizzly version, the quantum component introduces a new network service: LoadBalancer (Lbaas), and the architecture of the service complies with the Services insertion framework. LoadBalancer provides the tenant with a load balancing of traffic to a set of virtual machines, the basic implementation of which is to generate Haproxy configuration files in Neutron-lbaas-agent and then start Haproxy. Neutron Lbaas Service Architecture
Lb
=>s.school), tell EF, when querying student, please also query its associated School. If there are multiple entity associations, separate them with a comma ",". For example getallincluding (s=>s.school, S=>s.class)For ABP, if it is multi-tenant, users and other multi-tenant information can not be queried in the case, please add the following sentence before the query
Currentunitofwork.disablefilter
users. It is believed that with the application architecture of the Internet technology being accepted by the traditional industry, object storage and Swift will be more and more widely concerned.From the OpenStack kilo version of the data, the swift community presents a diversity of features and is developing healthily.This article and the next two articles in this series will introduce the architecture of Swift and give examples of scale deployment, starting with a hardware configuration to b
deleted data. You should filter it out.
When a user does this, each statement must be processed and manually added with filtering conditions. When the user stands at the business layer to implement the business, he must take a test on the data layer, how to decouple users' businesses from the data layer
If the user does not perform this operation, the user needs to perform a query at the business layer.
Select * from People command and then the system automatically queries the following corre
the network control software from the limitations of hardware black box devices. At the same time, their data plane functions are quite common, in order to be able to freely verify their research work on such a platform, the openflow-based network structure can meet their aspirations. Of course, due to the uncertainty of the research content, a certain amount of customized development work may be required for devices to verify innovative network technologies on openflow devices.
The cloud data
tempSaveUploadPicture call at/var/www/36tree_v2.0/mars/app/vccontroller/signup. class. php (170)#5 do_ajax_getHtmlSetAvatar call at/var/www/36tree_v2.0/corelib/CAction. class. php (127)#6 do_method call at/var/www/36tree_v2.0/mars/vchost/index. php (68)This violent path does not make any sense. continue to look at the products created.At a glance, I was overjoyed when I saw another place for uploads. ^-^ Www.2cto.comSo I randomly filled in some information to upload the captured packets, change
certain degree of data consistency to achieve high availability (HA) and scalability, supports multi-tenant mode, container and object read/write operations, and is suitable for solving unstructured data storage problems in Internet application scenarios.
2. Technical Features2.1
Key features of swift
The main features of SWIFT are as follows:
Extremely high data persistence (durability ).
A fully symmetrical system architecture: "Symmetry" m
. conf -- config-file/etc/neutron/plugins/ml2/ml2_conf.ini -- config-file/etc/neutron/plugins/linuxbridge/linuxbridge_conf.ini
In this way, the problem can be ruled out.
[[Email protected] ~] # Neutron net-list
[[Email protected] ~] # Neutron port-list
Let's take a look at the tenant ID.
[[Email protected] ~] # Keystone tenant-list
+ ---------------------------------- + ------- + --------- +
| ID | Name |
, traditional data security methods will be challenged by the cloud model architecture. Elastic, multi-tenant, new physical and logical architecture, and abstract control require new data security policies.1.1 data security management and challenges
The key challenges in cloud computing data lifecycle security are as follows.(1) Data Security: confidentiality, integrity, availability, authenticity, authorization, authentication, and non-repudiation.(2
floating IP 10.10.10.3 and the external network communication.vlan101 interface qr-e17162c5-00 tcpdump output:When the data is forwarded to the Tenant network, the address has become CIRROS-VM3 tenant IP 172.16.101.3.Summary:1. Floating IP allows the extranet to directly access the instance in the tenant network. This is achieved by applying the iptalbes NAT rul
this situation, Ciao team defines media concepts at the top level, namely, workload level, to ensure that each stack in the same environment does not affect each other. In this way, the orchestration layer ensures that users focus on their workloads rather than on whether they exist in virtual machines or containers.
Ciao project itself has a very simple architecture, which includes three core components:
Controller-executes tenant workload policie
) on the client side to protect the user.Multi-Tenant (multi-tenant) mechanism: Through the multi-tenant mechanism, not only can the large scale of users be supported more economically, but also can provide certain customization to meet the special needs of users.Second, the PAAs modeRoleWith PAAs, users can easily write applications on a development platform, in
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