Challenge Collapsar attack

HTTP Flood is an attack on Web service in the seventh layer of the OSI protocol. The attacker tries to imitate the web page request behavior of normal users. It is easy to launch and difficult to filter. It is extremely easy to cause the target server to run out of resources and fail to provide service.

CLI

Command Line Interface. The user types commands at the command prompt on the command line interface to perform required operations.

Cloud Disk Service

Cloud Disk Service (CDS) is an elastic storage system that supports random access. It provides original block-level storage devices for cloud servers and back-end storage support for cloud disks. From the perspective of cloud disk demand, the indicators that measure CDS are reliability and availability, throughput, IOPS, and abnormal recovery time. CDS has higher reliability and availability than local disks. It has a lifecycle independent of the cloud server and supports rapid expansion, online backup and rollback.

CNAME record

This is the alias record. This record allows you to map multiple names to the same computer. It is usually used for computers that provide both WWW and MAIL services. For example, there is a computer named "host.mydomain.com" (A record). It provides both WWW and MAIL services in order to facilitate user access to the service. Two aliases (CNAME) can be set for this computer: WWW and MAIL. The full names of these two aliases are "www.mydomain.com" and "mail.mydomain.com". Actually they all point to "host.mydomain.com".

CNAME domain name

After Baidu AI Cloud CDN accesses the accelerated domain name, the system assigns a "CNAME domain name" to the corresponding domain name. The accelerated domain name is used to complete the CNAME configuration at the domain name service provider to point to the CNAME domain name. After the configuration takes effect, the work of domain name resolution will be officially transferred to Baidu AI Cloud, and all requests for this domain name will be transferred to the Baidu AI Cloud CDN node.

CockroachDB

HTAP Database CockroachDB (HTAP Database for CockroachDB) is a converged distributed database product built by Baidu AI Cloud based on the world's latest NewSQL open source database CockroachDB, which supports both online transaction processing (OLTP) and online analytical processing (OLAP) services.

Column

That is, an attribute column. Each row can define a number of attribute columns as required, and each attribute records a part of data information of the row.

Content Delivery Network

Distribute the content of the source site to all nodes throughout the country, shorten the delay of users viewing the content, improve the response speed and availability of the website, and solve the problems of small network bandwidth, large user access, and uneven distribution of outlets.

Cookie

Sometimes, plural forms of cookies are used, that is, the data (usually encrypted) stored on the user's local terminal by some websites in order to identify users and track sessions.

CPA

Cost Per Action, generally the cost per registration

CPC

Cost Per Click

CPM

Cost Per Mile

CPT

Cost Per Time

CTR

Click Through Rate

CU

It is the basic unit of computing resources provided by stream computing. 1CU contains 1 core CPU and 4G memory. The charging standard is the duration of the CU unit price usage.

CVCA node

A node is the basic unit in a conversation flow. Nodes consist of root nodes, judgment nodes and action nodes.

CVCA entity

The key information or qualifications contained in the user's speech can be understood as the filtering conditions that the user needs to provide.

CVCA intent

Intent indicates the purpose of the user.

CVCA Control

The dispatch center of the intelligent customer service is responsible for the switch settings and dispatch policies of modules such as multi-round sessions, knowledge bases, and connected third-party services.

CVR

Click Value Rate, ad click conversion rate, CVR=(conversions/clicks)*100%

Policy

A policy is a collection of user privileges that describes the user's privileges to operate resources. Each policy is associated with a policy syntax (ACL). You can associate policies with users and user groups, and then use policies to control users' specific access rights.

Policy Syntax (ACL)

The policy syntax describes which users have privileges on which resources and which operations, so it is a collection of services, resources, and operations.

Trigger

Users use triggers to define and manage how events are generated.

Storage gateway

A storage gateway is a type of cloud storage service that provides storage protocol conversion functions. The storage gateway itself does not provide storage capabilities. Its data is persistently stored in other cloud storage services (object storage BOS). The storage gateway mainly plays the role of transit and protocol conversion.