defrag ssd

Code:#include Write Test Run Results:#./test# gcc Ssd_test.c-o test-lpthread#./testSSD Speed Test begin!SSD4 Test over!SSD0 Test over!SSD6 Test over!SSD1 Test over!SSD5 Test over!SSD7 Test over!SSD2 Test over!SSD3 Test over!SSD Write speed:1563.73594mb/s (1.30968SEC)SSD Speed Test over!Read Test Run Results:#./testSSD Speed Test begin!SSD1 Test over!SSD7 Test over!SSD3 Test over!SSD2 Test over!SSD4 Test ove

A lot of people have changed the SSD hard disk in the short term speed up quickly, but after a few months found the speed slowed. So what happens when the SSD slows down? Here are the SSD speed slow solution, and the C disk cannot be 4K aligned with the SSD hard drive (data lossless) Because the format of the h

analyzed. Locate the possible cause of the problem and try to make the following adjustments on the 24 master database: After the above adjustments, I/O became stable and there was no larger fluctuation. For the sake of insurance, project A decided to use an SSD-equipped model to migrate the master database, and migrate the 24 slave database 27. After the migration is completed, the SSD and MySQL InnoDB pa

I am preparing for the test recently. I need to check which machines are attached with ssd hard disks. I saw many methods in a circle on Google, but they are all in the fog and I don't know how to determine them. Ssd disks seem to use scsi interfaces, so they cannot be determined based on the drive letter name. At last, eric told the lsscsi tool in the group that it was very simple and displayed directly. N

Landlord office computer, originally only configured a piece of mechanical hard disk, with always very uncomfortable, so persuaded the leader to add a block SSD SSD.The operation is as follows:1, the PE under the partition format of the new solid-state drive, the original mechanical hard disk of the C-disk ghost backup and restore to a new solid-state drive;2. Remove the original C drive letter (drive letter: C, D, E, F) and cancel the active state;3.

Dell is still making different improvements to its most popular netbook Mini10, in addition to the 6-core battery option launched a few weeks ago. In 7th day of this month, the Mini 10 version of the customized Ubuntu system and SSD hard drive was launched, starting at $399. The Ubuntu Mini10 system also provides additional hard drive options, including 32 GB and 64 gb ssd hard drives at an additional price

Introduction:This paper mainly introduces several image matching algorithms based on gray scale: mean absolute difference algorithm (MAD), absolute error and algorithm (SAD), error square sum algorithm (SSD), mean error square sum algorithm (MSD), Normalized product correlation algorithm (NCC), Sequential similarity algorithm (SSDA). The following is explained in turn.Mad AlgorithmIntroduction mean absolute difference algorithm ( mean Absolute Dif

1. install hdparmyuminstallhdparm-y. 2. use the hdparm command to read the SSD hard disk. Hdparm-t/dev/xvdaSSH: run the preceding command to evaluate the read speed of SSD. NOTE: ldquo;/dev/xvda rdquo; indicates the drive number of the corresponding disk. run ldqu 1 to install hdparm. yum install hdparm -y II. read evaluation SSD hard drive. use the hdparm c

This article is for reading book next Generation Databases:nosql, Newsql, and Big Data Chapter 7th: The End of Disk? SSD and In-memory databases notes.The disk is dead?Bill Gates said in 1981: 640K of memory should is enough for anybody. In 2001, he realized that the previous statement was wrong: I ' ve said some stupid things and some wrong things, but not that. Since the birth of the first database, database experts have

1. The master chip is the core of SSD and determines the performance and stability. Mainly include Intel, JMF, Samsung, Indilloud, among which intel and Samsung are the leader, indilloud is the new expensive, and JMF is mainly oriented to low-end markets. 2. the cache chip assists the master chip in data processing to improve and stabilize performance. Some low-end products will save the cache dram chip for cost reasons. 3. NAND Flash chips mainly inc

SSD paper Reading (Wei liu--"ECCV2016" SSD single Shot Multibox Detector)Directory Author Reasons for the selection of articles Method Summary Method details Related Background supplement Experimental results Comparison with related articles Summarize authorreasons for the selection of articles Good performance, single stage Method Summary Int

　　 How to transfer the system to the solid state drive after installing the SSD System migration to SSD solid State hard Drive tutorial SSD Solid State hard disk installation system In fact, there is a very simple way, after the partition assistant upgrade 5.5, once again updated and enhanced this feature, open the latest version of the Professional edit

Apple Mac OS X 10.10.4 the way to unlock third party SSD trim What is trim? TRIM is a system-level command that allows better communication between the operating system and solid-state drives, determines which areas on the SSD are not used, and is ready to erase and write back. For solid-state drives (SSD), because of the inherent nature of flash memory, you mu

In Linux, check whether it is a solid state drive (SSD). Recently, we are preparing to test it. We need to check which machines are attached with an ssd hard drive. Google has seen many methods, but they are all in the dark, I don't know how to determine. Ssd disks seem to use scsi interfaces, so they cannot be determined based on the drive letter name. At last,

No research on SSDs, colleagues suggest that Apple on the unofficial SSD does not open trim, the Internet is a, to trim unknown.First, Trim is going on: http://bbs.feng.com/read-htm-tid-1870887.htmlSecond, open the unofficial SSD trim:http://bbs.feng.com/read-htm-tid-8997023.htmlIts method is very simple, according to gourd painting scoop can.sudo nvram boot-args="kext-dev-mode=1"Restart sudo cp/system/libr

Although Samsung introduced the fix last October, it was reported last month that some of the Samsung 840 EVO SSDs face the problem of reading off the old data after it has been brushed into the new firmware. In view of this, Samsung issued the following statement in the afternoon of Friday: "In October, Samsung launched a 840 EVO SSD firmware tool that only fixes old data read-off, but a small percentage of users said they would encounter the same pr

With the popularity of SSD drive, its superior IO performance has been replaced by more and more traditional SATA and SAS disk, there are three kinds of common application scenarios: 1) Replace the hard disk of MySQL database, the community does not have the MySQL version optimized for SSD, even so, Direct upgrade of SSD drives can also bring about 8 times times