磁盘缓存专题之一:缓存命中和缓存未命中缓存与缓冲间的差异
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Which folder does the browser cache the video in? When we use the Internet browser every day, we often watch various online videos, such as watching music videos on YouTube or watching movies on Netflix. These videos will be cached by the browser during the loading process so that they can be loaded quickly when played again in the future. So the question is, in which folder are these cached videos actually stored? Different browsers store cached video folders in different locations. Below we will introduce several common browsers and their

When creating a virtual machine, you will be asked to select a disk type, you can select fixed disk or dynamic disk. What if you choose fixed disks and later realize you need dynamic disks, or vice versa? Good! You can convert one to the other. In this post, we will see how to convert VirtualBox fixed disk to dynamic disk and vice versa. A dynamic disk is a virtual hard disk that initially has a small size and grows in size as you store data in the virtual machine. Dynamic disks are very efficient at saving storage space because they only take up as much host storage space as needed. However, as disk capacity expands, your computer's performance may be slightly affected. Fixed disks and dynamic disks are commonly used in virtual machines

This article will explain in detail how PHP formats rows into CSV and writes file pointers. I think it is quite practical, so I share it with you as a reference. I hope you can gain something after reading this article. Format rows to CSV and write to file pointer Step 1: Open file pointer $file=fopen("path/to/file.csv","w"); Step 2: Convert rows to CSV string using fputcsv( ) function converts rows to CSV strings. The function accepts the following parameters: $file: file pointer $fields: CSV fields as an array $delimiter: field delimiter (optional) $enclosure: field quotes (
![How to increase disk size in VirtualBox [Guide]](https://img.php.cn/upload/article/000/887/227/171064142025068.jpg?x-oss-process=image/resize,m_fill,h_207,w_330)
We often encounter situations where the predefined disk size has no room for more data? If you need more virtual machine hard disk space at a later stage, you must expand the virtual hard disk and partitions. In this post, we will see how to increase disk size in VirtualBox. Increasing the disk size in VirtualBox It is important to note that you may want to back up your virtual hard disk files before performing these operations, as there is always the possibility of something going wrong. It is always a good practice to have backups. However, the process usually works fine, just make sure to shut down your machine before continuing. There are two ways to increase disk size in VirtualBox. Expand VirtualBox disk size using GUI using CL

Title: How to solve the "Adiskreaderroroccurred" error Word count: 1470 Introduction: In the process of using the computer, we may encounter various errors. Among them, hard disk read errors are one of the more common problems. When your computer displays "adiskreaderroroccurred", it means that your computer cannot read data from the hard drive. While this problem can cause some trouble, luckily there are some ways you can

DNS (DomainNameSystem) is a system used on the Internet to convert domain names into corresponding IP addresses. In Linux systems, DNS caching is a mechanism that stores the mapping relationship between domain names and IP addresses locally, which can increase the speed of domain name resolution and reduce the burden on the DNS server. DNS caching allows the system to quickly retrieve the IP address when subsequently accessing the same domain name without having to issue a query request to the DNS server each time, thereby improving network performance and efficiency. This article will discuss with you how to view and refresh the DNS cache on Linux, as well as related details and sample code. Importance of DNS Caching In Linux systems, DNS caching plays a key role. its existence
![[Linux system] fdisk related partition commands.](https://img.php.cn/upload/article/000/887/227/170833682614236.jpg?x-oss-process=image/resize,m_fill,h_207,w_330)
fdisk is a commonly used Linux command line tool used to create, manage and modify disk partitions. The following are some commonly used fdisk commands: Display disk partition information: fdisk-l This command will display the partition information of all disks in the system. Select the disk you want to operate: fdisk/dev/sdX Replace /dev/sdX with the actual disk device name you want to operate, such as /dev/sda. Create new partition:nThis will guide you to create a new partition. Follow the prompts to enter the partition type, starting sector, size and other information. Delete Partition:d This will guide you to select the partition you want to delete. Follow the prompts to select the partition number to be deleted. Modify Partition Type: This will guide you to select the partition you want to modify the type of. According to mention

Title: Caching mechanism and code examples of HTML files Introduction: When writing web pages, we often encounter browser cache problems. This article will introduce the caching mechanism of HTML files in detail and provide some specific code examples to help readers better understand and apply this mechanism. 1. Browser caching principle In the browser, whenever a web page is accessed, the browser will first check whether there is a copy of the web page in the cache. If there is, the web page content is obtained directly from the cache. This is the basic principle of browser caching. Benefits of browser caching mechanism
