t420 ssd

Ceph environment setup (2)1. There are three layout hosts: node1, node2, and node3. Each host has three osdks, as shown in figure. osd1, and 8 are SSD disks, 4 is the SATA disk. Each of the three hosts has a Monitor and an MDS. We use osd1, 3, and 4 to create a pool named ssd, in the form of three copies, osd0, and 2, 4 to build a Pool named sata, in the form of Erasure code, k = 2, m = 1, that is, use two

market is difficult to buy such network cards)72M 802.11n specification, the maximum speed can be achieved under the single Mimo,20mhz bandwidth(at present, a lot of machines with crab card, typical is X220 T420 and some other machines with Realtek BGN 1x1 network card, this type of network card in the 40Mhz bandwidth is not open when the speed, want to speed up, it is recommended to switch on the network card and router on the 40Mhz bandwidth settin

by Wei Liu, Dragomir Anguelov, Dumitru Erhan, Christian szegedy, Scott Reed, Cheng-yang Fu, Alexander c. Berg.IntroductionSSD is an unified framework for object detection with a single network. You can use the code to train/evaluate a network for object detection task. For more details, please refer to our ARXIV paper.SSD FrameworkSystem VOC2007 Test MAP FPS (Titan X) Number of BoxesFaster r-cnn (VGG16) 73.27300Faster r-cnn (ZF) 62.117300YOLO63.44598Fast YOLO52.715598SSD300 (VGG16) 72.1587308SSD

What are the optimization techniques for solid-state drives? Solid-State hard disk is called fixed disk, is a solid-state electronic memory chip array made of hard disk, its chip operating temperature range is very wide, business regulation products (0~70℃) of the product ( -40~85℃). Although the cost is high, but also is gradually popularized to the DIY market. The new generation of solid-state drives generally adopt SATA-2 interface, SATA-3 interface, mSATA interface and Cfast interface. Let

Symptoms and causes of SSD freezingI7 ● SSD choppy symptomsA friend who recently bought a new SSD may be troubled by a problem, that is, the system stops responding or gets stuck for no reason. The specific situation can be shown as follows according to the SSD master:1. Sandforce control: during normal computer operat

The CEpH experiment environment has been used within the company for a period of time. It is stable to use the Block devices provided by RBD to create virtual machines and allocate blocks to virtual machines. However, most of the current environment configurations are the default CEpH value, but the journal is separated and written to a separate partition. Later, we plan to use CEpH tier and SSD for some optimizations: 1. Write journal to a separate

As we all know, solid-state hard drive optimization (hereinafter referred to as SSD) can make the use of disk more efficient. Here we will teach you how to optimize your SSD in different ways. Data that may be stored during optimization is lost, so it is recommended that you back up the original data first. SSD optimization is a very targeted setup process, this

Download Yosemite, format the disk, run the following command to make the OS X boot diskSudo/applications/install\ os\ x\ Yosemite.app/contents/resources/createinstallmedia--volume/volumes/untitled-- Applicationpath/applications/install\ os\ x\ Yosemite.app--nointeraction How to make Fusion drive. Starting from the U disk, go to the disk utility and format the SSD and HHD separately. Then enter the console and run the following command.The first instr

802.1 issues in LINUX-general Linux technology-Linux technology and application information. For details, refer to the following section. The younger brother is a newbie. students in the school. The campus network does not have a LINUX client, so they have to find one on the Internet. After installation, the following prompt is displayed during running: [Root @ BYSTANDER mdc-ssd] # mdc-ssd Fcntl (F_SETFL):

How do I differentiate the solid-state drives of the M.2 interface? M.2 is Intel led the development of a new generation of interface standards, with a smaller size, faster interface features, the current main specifications are the following, mainly the length is not the same. The image below is a two-m.2 SSD: The short one is the Shadow Armor War m.2 128GB Long is the Shadow Armor War m.2 256GB These two are m.2 interfac

applications of solid-state hard disk generally have different interfaces. Solid-state hard disk compared with traditional mechanical hard disk, interface specifications are more easily confused by the initial users, the following is described below: 　　Mainstream common--sata interface SATA interface is no longer a new technology, since 2001 SATA 1.0 to the current SATA2.0 and SATA3.0, has made SATA as the current solid-state hard disk main interface. In terms of current usage, SATA2.0 users

Can TRIM operations be performed in RAID? I wonder if you have considered the following question: can TRIM operations be supported in RAID? Imagine how to unmap the data block in the SSD by using the TRIM command after the RAID is created on the SSD and the application software (File System) runs directly on the RAID software? It seems that this is not a problem. In fact, it is a big problem for RAID. From

Intel has recently been exerting its power at the channel end, and the computer stores, 3C stores and the manufacturers of the manufacturers have been pushing the pole. However, in the face of "super extreme" this jerky vocabulary, a large number of users do not understand their meaning. Many consumers think "ultra-extreme" means super lightweight and super performance. There are many consumers do not understand the use of expensive SSD, there are a l

With the innovation of storage technology, solid-state hard disk (SSD) plays an increasingly important role in enterprise application. The advantages of SSD performance are obvious compared with traditional hard disk, whether it is read-write or random access speed. But traditional hard drives are mature products that have existed for decades as mainstream storage media and have been supported by a series o

from a technical point of view, NAND Flash Flash Media Although there is a problem of the number of erase times, but with software algorithms, system-level data protection technology,NAND flash life is no longer a difficult problem, and NAND flash More advantages have become an important driving force for the technology to move forward. SSDs built with NAND Flash are rapidly replacing traditional disks, have been widely used in the Internet, and continue to penetrate into the enterprise-class m

which AZ the user can guarantee high reliability by creating virtual machines in multiple AZ.Haz also divides a batch of compute nodes with a common attribute into the same Zone, which can be further subdivided into AZ, an AZ can have multiple HAZ. machines in the same HAZ have some common properties, such as high-performance computing, high-performance storage (SSD), high-performance networking (Sriov support, etc.). The other difference between Ha

Bcache is the Linux kernel block layer cache. It uses SSD as the cache of the HDD hard disk to accelerate the operation. HDD disks are cheaper and have a larger space. SSD is faster but more expensive. If you can have both of them, isn't it easy? Bcache can do this. Bcache uses SSD as the cache for other Block devices. Similar to the L2Arc of ZFS, bcache also add

Practical recruit one: specific speed The biggest advantage of SSD is high speed reading and writing speed. Traditional hard drive lane speed in the reading and writing 70m/s, and professional enterprise-level SSD can reach read and write 120m/s above, random read and write speed, ioPS read is hard drive about 100 times times, write is about 10 times times. Solid-state hard disk speed is mainly to look at

7200RPM mechanical hard disk, also added a 2G memory, let it serve 2 years. According to the "Moore's Law" of integrated circuit components every 18-24 months to increase the number of times, performance will be nearly one more times, my "little black" is almost three times times the mainstream of the market. And now a variety of software volume and the hardware operating environment required space resources is also more and more high (those software manufacturers, you do not think the hardware

With the popularization of SSD solid-state drives, now with the cache of SSD prices are gradually accepted by users, although we know that there is no cache of SSD in the price will be slightly more expensive than the cache, but the cache on the SSD solid state hard drive how the role played by not every user is aware.