Dell's new version of Alienware 13 is an example of what it claims to be the world's first 13-inch Vr-ready notebook.
The starting price for Alienware 13 is not high--at least for the brand--but 1200 dollars (about 8105 yuan). This cost allows you to get the Intel Core I5-6300HQ processor, NVIDIA GeForce GTX 1060 graphics, 8GB ddr4-2133 memory, 180GB m.2 SATA 6Gbps SSD, killer 802.11c Wi-Fi, Bluetooth 4.1 and Windows 10 64-bit systems.
The low-Alienware version uses a TN screen wi
The new MacBook has been in the market for a while, with its ultra-thin, new processors, stronger battery endurance and a new color palette that may be tempting for many consumers, if you've never been in touch with an Apple device or a MacBook before, before you're ready to buy a MacBook, Just take a little time to understand these 5 things.
Faster chips, still so quiet as a MacBook.
The MacBook uses the Intel M3,M5,M7 processor, and of course the difference is in the price. The 1
The new MacBook has been in the market for a while, with its ultra-thin, new processors, stronger battery endurance and a new color palette that may be tempting for many consumers, if you've never been in touch with an Apple device or a MacBook before, before you're ready to buy a MacBook, Just take a little time to understand these 5 things.
Faster chips, still so quiet as a MacBook.
The MacBook uses the Intel M3,M5,M7 processor, and of course the difference is in the price. The 1
used for Linux and flash memory interactions, which is like a layer of flash transfer. Drivers for other block devices and character devices do not map with how flash devices operate. Although USB memory cards and SD cards are flash devices, they do not use this driver because they are hidden behind the system's block device interface. This driver is used for general purpose flash drive drivers for new flash memory devices.Net-Network drivers provide network protocols like AppleTalk, TCP, and o
1, hardware layer-related optimization
1.1. CPU Related
In the server's BIOS setup, you can adjust the following configurations to maximize CPU performance or avoid classic NUMA issues:
(1), select Performance per Watt optimized (DAPC) mode, play CPU maximum performance, run DB This usually requires high computational services do not consider power-saving;(2), turn off C1E and C states and other options, the purpose is to enhance CPU efficiency;(3), Memory Frequency (Memory frequency) Select
scanning the hard disk surface to check if there is a bad way)
3, memory failure (through the motherboard BIOS in the error report and operating system errors to judge)
4, motherboard failure (using the replacement method to judge)
5. CPU failure (using substitution method)
6, the Board card failure (generally Scsi/raid card or other PCI devices may also cause system panic, can be used to determine the replacement method)
5. For other common malfunctions, the chassis led turns yellow and r
, the use of SSD or PCIe SSD devices, at least hundreds of times times or even tens of times the IOPS increase;2, the acquisition of the array card with the cache and the Bbu module, can significantly increase the IOPS (mainly refers to mechanical disk, SSD or PCIe SSD except. At the same time, the health of the cache and the Bbu module should be checked periodically to ensure that the data is not lost duri
can support 5w QPS, and in some simple scenarios, you may not even have to configure the cache layer to do the caching.
PS: Hardware testing is best to do their own measurement, the official data can only be used as a reference value, because many times the performance depends heavily on the scene, thinning to different SQL will get a big difference between the conclusion, it is best to test themselves.
In 2012, Weibo used Pcie-flash to
improve database performance and improve the concurrency of our database!TIPS: use multi-core CPUs.The third palm----See the Dragon in the fieldAs we all know, IO is always a bottleneck for the database, and it is possible for some time in the future. Therefore, the requirements for the storage medium is very high, for the high IO system, it is recommended that we use the faster storage SSD SSDs can improve the data read and write performance of hundreds of times or the
probability. 3, Adopt RAID-10, and choose force WB. At the OS level, you can have several optimizations:
Adjust IO Scheduler
Using XFS
Adjust other kernel options
Note:
Vm.swappiness, reduce the probability of the occurrence of swap;
Vm.dirty_background_ratio Vm.dirty_ratio To avoid a sudden large number of I/O requests causing the system to die.
From this test results can be seen noop/deadline have obvious advantages. This IO scheduler can also
performance increase:1, the use of SSD or PCIe SSD devices, at least hundreds of times times or even tens of times the IOPS increase;2, the acquisition of the array card with the cache and the Bbu module, can significantly increase the IOPS (mainly refers to mechanical disk, SSD or PCIe SSD except. At the same time, the health of the cache and the Bbu module should be checked periodically to ensure that th
Note: Sometimes you may need to restart the server to make the server system load the new driver completely: view the new NIC driver information: [root @ qs-wg-web2 ~] # Ethtool-I eth0driver: bnx2version: 2.2.3ffirmware-version: 6.2.12 bc 5.2.3 NCSI 2.0.11bus-info:. 0 automatic down is not found. Note: Please carefully check INSTALL before installation. TXT is as follows: [root @ qs-wg-web2 Driver] # cat INSTALL. TXT Installation Notes Broadcom NetXtremeII Linux Drivers 09/26/2011 Broadcom Cor
to the csv/txt file .650) this.width=650; "src=" http://s3.51cto.com/wyfs02/M02/6E/A0/wKiom1WBGp_Q6OAOAAB2S7NeuRE239.jpg "title=" 9.jpg " alt= "Wkiom1wbgp_q6oaoaab2s7neure239.jpg"/>-siHow many seconds to get once- oExport to-FCHow many times?above isExport toAasda.csvinside the file, everyTenseconds at a time, -times, you canCtrl +cend early. Zabbix the key value to use "\networkinterface (Realtek PCIe GBE Family Controller) \bytes sent/sec"Zabbix wi
/netxtreme2-6.2.23/bnx2x-1.62.15/src'
[Root @ server46 netxtreme2-6.2.23] # ls
If no error is prompted in the middle, there will be too much content, and there will be no more
At this point, you need to note, because the directory/home/mysql/Server/Linux/Driver/netxtreme2-6.2.23 has multiple bnx2, bnx2i, bnx2x
How to determine the driver file in the directory to be installed? Check the previous INSTALL. TXT file.
-Bnx2 driver for the Broadcom NetXtreme II BCM5706/BCM5708/5709/5716
10/100/1
, but it takes 7 hours to complete the installation because the company's network is too slow! The eggs are broken...
After the compilation from/binfile home out of the firmware openwrt-ramips-mt7620-uImage.bin, tftp imported to flash found that the startup is not up, the error is as follows:
LINUX started... THIS IS ASIC[ 0.000000] Linux version 3.10.14 (cjpthree@F12) (gcc version 4.8.3 (OpenWrt/Linaro GCC 4.8-2014.04 unknown) ) #3 Tue Jan 12 18:40:44 CST 2016[ 0.000000] [ 0.000000] T
facilitates the design and implementation of the system management software.The overall architecture of a typical IPMI is as follows:650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M02/73/42/wKioL1X49ZTxH46tAANUQv_feQI521.jpg "title=" Ipmb.png "alt=" Wkiol1x49ztxh46taanuqv_feqi521.jpg "/>As you can see from the above diagram, there may be multiple BMC,BMC on a system that can connect to some non-intelligent cards or sensor, which is connected to the BMC and BMC via IPMB. Interfaces to th
GPU coarse-grained parallel implementation and testing for convolution operationsFirst, the basic idea of the algorithm:1. A thread in the GPU produces a convolution result, and how many blocks are used for the number of results;2. Matrix and convolution cores are stored in shared memory, and the convolution results are stored in global memory;3, support 10000 in any dimension of the two-dimensional matrix, convolution core support 16x16.4, support any number of images batch processing.Second, t
http://www.hkepc.com/13139While there are a number of high-tier SSD products switched to PCIe interface to break through the SATA interface of the bandwidth of the décolleté, but the controller design and SATA interface SSD, the old AHCI controller interface, the advantage is that most of the operating system has natively supported AHCI drivers, compatibility of high-energy support of the absolute partial Operating system and the main board platform,
performance computing, how to choose?There is a paper study, too high accuracy for deep learning error rate is not improved, and most of the environmental framework only support single-precision, so double-precision floating point calculation is not necessary, the Tesla series have been removed. From the performance indicators of the graphics card, Cuda core number of more, GPU frequency, memory to large, high bandwidth. In this way, the newest Titan x is a cheap and sufficient choice.CPU Selec
m.2 formerly known as NGFF interface, which is for ultra-polar Ben ( Ultrabook A new generation of interface standards tailored to replace the original Mini PCIe the improved MSATA interface. Whether it's a smaller size or a higher transmission performance, m.2 is far better than MSATA. SATA interface SSD different, SSD change to pcie After the bus, it can be connected directly to cpu Span sty
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