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When we use a database, always want the content of the database is reliable, correct, but because of computer system failures (including machine failure, media failure, misoperation, etc.), the database may also be damaged, then how to recover data as soon as possible is a top priority. If you make a backup of your database at the usual time, it's easy to recover the data at this point. This shows that a good database backup is how important, the following author to ORACLE7 as an example, to tel

database Sql>startup Cold Backup Advantages: Just copy the file and it's a very fast backup method. Simply copy the file back and you can restore it to a point in time. The combination of a database archiving pattern allows the database to recover well. Less maintenance, but relatively high security. 2. Hot Backup Although cold backup is simple and fast, in many cases, such as when the database is running in the 24*7 state (24 hours a day, 7 days a

The so-called hot spots, are all concerned about the incident. Or there is a connection with their own, such as account security, the Ministry of Railways online ticketing, etc. or is related to their interests, you are engaged in SEO, then Yahoo's search outsourcing news, will certainly trigger you and other SEO clicks. In the same way, on your website, put some hot news reports and comments, the premise i

Hot vs Cold observables Understanding the nature of hot and cold observables are a crucial part to master observables. Before we try to explore the topic through some practical examples, let's read through the definition from the RxJS projec T itself Cold observables start running upon subscription, i.e., the observable sequence only starts pushing values to the Observer s when the Subscribe is called. (..

Oracle Hot Backup refers to copying data files when they are in use. DBWR is also in progress during the replication process. Therefore, the backup may result in "inconsistent" backup: Articles: Oracle recovery Internal principles http://www.bkjia.com/search.aspx? Where = nkey keyword = 19824 A. Some data blocks may be earlier than other data blocks. B. the SCN of some data blocks may be earlier than the SCN of the data file header. C. Some blocks ma

Use hot spots to improve the flow of the site we should be no stranger, we will often see some "use of hot events to create how many million traffic", "How to use hot events to do traffic" and so on such articles. Whether the webmaster, or the site operation of friends, want to improve the site's traffic and ranking, traffic up to get everyone and boss recognitio

# PrefaceIn the previous article of the ClassLoader JVM, we said that the hot deployment can be implemented by modifying the default ClassLoader, but in the Java development realm, hot deployment has always been a difficult problem, the current Java virtual machine can only implement the method body modification hot deployment, for the entire class structure modi

be used, but the performance is reduced a lot2. Boot and auto mount of the diskIn the above already said how to make disk RAID0, the way to make disk probably also that several steps, need to boot hangs in the words, then go to/etc/rc.d/rc.sysinit inside to configure, specifically add the following code snippet is okUpdate_boot_stage Rcraid[-x/sbin/nash] echo "raidautorun/dev/md0" | Nash--quietIf [-f/etc/mdadm. conf]; Then/sbin/mdadm -a-sFiFor automatic mounts, add this code below the/etc/fsta

In the actual development of Spring Boot hot deployment, modifying a page data or logical function requires a restart of the app. This virtually reduces the development efficiency, so it is necessary to use thermal deployment. What is a hot deployment? After the application starts, it will load the compiled class file into the virtual machine, under normal circumstances when the project modifies the source

Technical Introduction Devtools: is a boot of a hot deployment tool, when we modify the files under the Classpath (including class files, properties files, pages, etc.), the application will be restarted (due to its use of the two-class loader mechanism, this start will be very fast, If this boot is found to be slow, you can choose to use Jrebel) two-class loader mechanism : Boot uses two ClassLoader to implement the restart (resta

MySQL database dual-Machine hot backup 1, MySQL database does not have incremental backup mechanismBackup is a big problem when the amount of data is too large. Fortunately, MySQL database provides a mechanism of master-slave backup, in fact, all the data of the primary database is written to the backup database at the same time. Implement a hot backup of the MySQL database.2, to realize the dual-machine

Currently, the dual-host and cluster operating systems mainly include UNIX, Linux, BSD, and Microsoft's Windows NT/2000. WithWith the rapid development of Linux, the stability, security, and functions of Linux are constantly enhanced.As an important operating system in the server market, there are more and more dual-host and Cluster Systems Based on Linux. Linux clusters have the following advantages: high reliability, high performance, and low cost. 1.1 Overview1.1.1 ImplementationHot Standby i

For Oracle databases, only physical and logical backups Physical Backup: A backup process that copies the operating system files that actually make up the database from one place to another, usually from disk to tape. Logical backup: Is the process of extracting data from a database in a SQL language and coexisting it in a binary file. The first class is a physical backup, which implements a complete recovery of the database, but the database must run in the back-block mode (the business datab

Cordova Hot Code Push Plugin This plugin provides the ability to enable the Cordova app to automatically update Web content. Basically, all the files in your app that are in the WWW directory can be automatically updated. When you re-publish the new app-repackage the Web content: HTML files, JavaScript code, pictures, and so on. There are generally two ways to upgrade: The new app is on the shelves in AppStore. But it takes a long time. At the expens

For an Oracle database tutorial, only physical and logical backups Physical Backup: A backup process that copies the operating system files that actually make up the database from one place to another, usually from disk to tape. Logical backup: Is the process of extracting data from a database in a SQL language and coexisting it in a binary file. The first class is a physical backup, which implements a complete recovery of the database, but the database must run in the back-block mode (the bu

Although the topic of this article is a little freehand, but it is purely technical analysis paste, borrowed a hot pot store story, discuss the report query scenario delay problem and a bit of database characteristics. Long ago, there is an old-time hotpot shop, Customer Ying Men, business is booming. Hot pot, we all know, the first is poured into the bottom of the soup, such as soup boil, to put vegetable

Many users who use WPS are reflected: WPS Hot news will automatically pop up, very disturbed, what method can prohibit the WPS Hot News window automatically pop-up it? On this issue, small series to provide you with two solutions, we can see which way is more suitable for you. Let's take a look at today's ban on WPS hot News Automatic Pop-up settings method.

First of all, the address of the two projects, these two projects are a more complete LUA solution, from the efficiency and use of the same way, I finally chose Ulua, but not to say that it has an overwhelming advantage.Ulua:http://ulua.org/index.htmlSlua:https://github.com/pangweiwei/sluaThe introduction of LUA is basically for hot updates, but Apple seems to have a tight limit on the hot updates to LUA sc

A Detailed procedures for hot updates First we need to open the computer as a server, this is the first step 1.1.1 How to make sure that our computer is open as a server.we open a browser and enter 127.0.0.1 in the Address bar . or localhost if the reality is not the link can not be linked toas shown in the following:Figure 11.1.2 If the link fails, download the IIS installation and open the relevant service. But here's another way to do

Pci_hotplug.ko in the 2.6 kernel is a kernel module, and the HotPlug package is used to handle the HotPlug events generated by the kernel. The package also detects existing hardware at boot time and loads the associated modules in the running kernel. Not only hot plug, but also cold pluging. Hot-swappable occurs after the kernel starts, and cold pluging occurs during kernel startup. /etc/hotplug/*.rc These