how to defragment

The myth that Linux systems never need to defragment the disk is believed to have been heard by many people. Because Linux uses a good log file system (ext2, Ext3, Ext4, Btrfs, etc.), in most cases it does not need to defragment the disk.What is a disk fragmentation file?When a file system reads and writes files on a disk's sector, it forms a discontinuous whole, resulting in a disk fragmentation file. This

If you are a Linux user, you may hear that Linux file systems do not require defragmentation. You may also notice that the Linux distribution does not have the ability to defragment the disk. What is this for?To understand why Linux file systems do not fragment like Windows ' file systems, you first need to understand how fragments are generated, and how the file systems of these two operating systems work differently.　　What is disk fragmentation?Many

previous step. This will not cause disk fragmentation due to the expansion of the paging file in the hard drive, and its side effect is that the "maximum" is set to a lesser size, in case of accidental virtual memory overruns, which can cause the system to crash. 　　Setting the paging file Now go back to the Virtual Memory Settings dialog box to select a custom size and set the initial size and maximum values according to the results of the above calculations. Here we set the "Initial size" to

No matter what type of equipment, if it is overworked for a long time, its service life will be greatly shortened, this is not the hard drive is one of the good representatives. Indeed, if the hard drive keeps turning, the hard drive may not take long to be "scrapped", for this reason many people often use the hard disk to keep the system on standby, so that the hard disk can get a timely and effective "rest" in this time; in fact, sometimes the system is in a standby state, The hard drive is st

Gnu/linux is not what everyone wants to use. If you only need to deal with general tasks and play games, then you don't need to know about Linux. UNIX is more suited to scientific research than Windows. Most of the scientists and engineers use UNIX as a computer tool. Because it is simple, reliable, stable, strong, interesting. Even UNIX is the only option in many cases. There are a lot of people who don't understand Linux and UNIX, although they're also using it, but they sometimes ask

The computer is our present work and the entertainment must the Dongdong, but like us, once the thing too many we will feel the burden is very big, is difficult to operate, how in the end how can optimize our computer? Today we will introduce you to 10 computer optimization methods! Let's start with a count of 10! How to defragment a disk partition Q: I installed a windows98/xp dual system, I heard that in Windows XP to

1. We entered my computer, in the WIN7/8 system is "Computer", we double-click to open, as shown in the following figure! 2. If I now defragment the C disk, we simply select C, then right-click it in the pop-up menu click "Properties" selection, as shown in the following figure 3. In the "Local Disk C: Live" dialog box, we click on the Tools tab! 4. Find the bit "defragment now" as shown in the fol

Myth #29: You can defragment the heap after you drop the heap by a clustered index NOOOOOOOOOOOOO!!! To heap a clustered index and drop it seems to me to be the top 2 in addition to shrinking the database. If you see fragments on the heap through sys.dm_db_index_physical_stats (or an older version of DBCC SHOWCONTIG), do not defragment the heap by creating a clustered index and then deleting the clustere

1. Rack and cable server ensure that each power supply plugs into a different power circuit if possible, make sure that the network cable is plugged into a different network switch 2.SQL Server service and the SQL Server Agent service uses a domain account. During SQL Server 2012 installation, you will need to know the user names and passwords for these accounts to usenever expireThe password 3. Check the primary BIOS settings on the serverenable Hyper-threading and Turbo-boost(is an overclockin

Label:In a database with a large number of transactions, tables and indexes are fragmented over time. Therefore, to improve performance, you should periodically check the fragmentation of tables and indexes, and defragment them with a lot of fragmentation. 1. Determine all the tables in the current database that need to be analyzed for fragmentation. 2. Determine the fragmentation of all tables and indexes. 3. Consider the factors to determine the tab

1, first find "Disk Defragmenter" from the Start menu. You can choose Start-All Programs--attachments--System Tools--Disk Defragmenter, or you can find them directly in the search bar. 2. Under current status, select the disk that you want to defragment. Here, if you cannot determine if there is fragmentation on your disk, you can select the analysis disk first. Of course, if you are certain that you know that a disk must be fragmented, you can also

Reprint to: http://beikeit.com/post-495.html simple translation: This Linux official information mainly describes the external fragments (external fragmentation), internal fragments (internal Fragmentation) concept and the related situation, it shows that the Linux file system in the case of 5% free disk space is not required to defragment. (Linux native file systems do not need defragmentation under normal use and this includes any condition with at

there are external fragments. Logical scan Fragmentation: Percentage of unordered pages. The percentage should be between 0% and 10%, and high will indicate an external fragment. Extents Scan Fragmentation: the percentage of the unordered extents that are in the scan index leaf level page. The percentage should be 0%, and high will indicate an external fragment. Avg. bytes available on each page: the average number of bytes available on the page being scanned. The higher is th

life. In addition, excessive disk fragmentation can also result in the loss of storage files.What this says is how Windows produces external fragmentation, which is actually related to the data structure used by the file system. For fat, a chain-style structure is used to record the clusters used by a file. The benefit of this approach is the need to contribute to the dynamic growth of the file. But with the problem of fragmentation, so that when reading and writing files, the head frequently m

Disk defragmentation is an operation that we often use when we operate a computer. Disk defragmentation is the removal of disk-fragmented files by cleaning up the disk's junk files to free up more disk space and faster disk speed. Now most people are using the Win7 system, where is the disk Cleanup of the Win7 system? How do I clean up disk fragments? Now go with the little ones to see where the Win7 Disk Cleanup and defragmentation is. 　　The specific steps are as follows: 1. Open Explorer, r

First, remove the memory, then use the eraser to clean up the memory of the fingers, and then clean the slot, and then plug the memory bar. If there are two memory on the motherboard, it may be due to incompatible memory. Second, check repair hard drive errors. On the WIN8 system, click on the Start menu, then select Run Dialog on the Start menu, then enter CHKDSK/R on the Run window and click OK to restart the computer. Third, defragment the disk

Often read and write to disk, the storage of the data on the disk becomes very messy, often a file will be divided into several parts stored in different locations, which will not only easily lead to data damage or loss, but also seriously affect the speed of the Win7 system. Therefore, it is necessary for us to defragment the disk on a regular basis. 1th Step: Click Win7 's start-All Programs-accessories-System Tools-Disk Defragmenter command to sta

Myth #29: You can defragment the heap after you drop the heap by a clustered index nooooooooooooo!!! To heap a clustered index and drop it seems to me to be the top 2 in addition to shrinking the database. If you see fragments on the heap through sys.dm_db_index_physical_stats (or an older version of DBCC SHOWCONTIG), do not defragment the heap by creating a clustered index and then deleting the cluster

. You can enter in the command line prompt window: Defrag C:-B After the carriage return, the system will defragment the C disk. Or you can create a shortcut to this command specifically and place it on the desktop for easy startup. However, it takes longer to use this parameter to defragment the disk. Little Tips Additional parameters for Defrag This command is primarily used for disk grooming from t

What should be included in the daily maintenance and maintenance of MAC OS X Systems has been controversial. The article on the network is a lot of tricks, less a page, more than more than 10 pages, and even on some issues contradictory to each other, even Apple's own knowledge base of the articles have conflicting places. More comprehensive maintenance and maintenance articles, generally mentioned the following: 1 Running routine maintenance scripts (Scripts) 2 Clear Cache (Caches) 3 Repairi