DescriptionRaw: Unprocessed type, can store binary data or byte charactersLong: variable long string data, longest 2g,long has VARCHAR2 column attributes, can store long text in one table up to a long column "not recommended"Long RAW: variable Long
Before creating a virtual machine, first add a virtual machine disk, use image in KVM to represent the virtual disk, and before adding the virtual machine diskFirst you need to know how to make an imageQEMU-IMG is a Disk management tool for QEMUOne,
The basic principle of qcow2The QCOW2 image format is a disk image supported by the QEMU emulator. It is also possible to represent a fixed-size block device disk in the form of a file. Compared to normal raw format mirroring, the following features
1. Raw Socket Base
Provides a way to bypass the entire network stack traversal and deliver Ethernet frames directly to an application.
There are a number of ways to create raw sockets, such as Af_packet,pf_packet. Here you use Pf_packet,
1. The difference between AWR original data and AWR reportawr raw Data:is the Oracle database Mmon process periodically dumps statistics from memory to disk, and in a structured form into several tables that form the raw data for an automated
Copy codeThe Code is as follows:Create or replace procedure procsendemail (P_TXT VARCHAR2,P_SUB VARCHAR2,P_SENDOR VARCHAR2,P_RECEIVER VARCHAR2,P_SERVER VARCHAR2,P_PORT number default 25,P_NEED_SMTP int default 0,P_USER VARCHAR2 default null,P_PASS
Bindings for bare devices under the Linux platform:using raw bindingsMethod one raw configuration (1)[Email protected] mapper]# cat/etc/rc.local#!/bin/sh## This script is executed *after* all theother init scripts.# can put your own initialization
JSON (JavaScript Object notation) is a lightweight data interchange format. JSON uses a completely language-independent text format that makes JSON an ideal data exchange language. Easy for people to read and write, but also easy to machine parsing
The header field of the mime message.Content-TypeThe content in the Content-Type field is in the form of "main type/subtype". The main types include text, image, audio, video, application, multipart, and message, it represents text, images, audio,
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