, feedback love technology to share all the netizens.Optimization of the hardware layerThe newly purchased server runs in power-saving mode by default, and in a business scenario with a large number of concurrent accesses, it can cause database performance to keep up, causing a lot of delays and eventually bringing down the business system. At the same time, improper disk selection and array card setup can also make database performance a bottleneck for the entire business system.Goal one: Compl
boost: 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 the data is not
sets of mini-batch data at the same time, and at the end of a round of mini-batch training, parameter exchange is required synchronously. The parameter Exchange in data parallelism requires that each model copy be merged with the gradient obtained in this mini-batch training to update the model, and then the latest model is pushed to each data parallel unit for the next round of calculations. How to solve the parameter exchange bottleneck to improve the performance is the most serious problem i
card's BBU module is damaged or has no power, and the write policy is set to force WB, the OS sends an IO write request and writes to the cache. At this point, if the machine is out of power, the data in the array card cache will be lost. 3, wt = Write through: Do not write cache directly write disk. Turn off pre-read, no need to read, the valuable cache is used to write cache (highly recommended)Turn off the physical disk cache policy to prevent data lossNote: When the server loses power,
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 PCI
used to connect hard disk, USB, NIC and other interface equipment.The frequency supported by the North Bridge is called the front-end bus speed (Front Side BUS,FSB), and the number of bits per transmission is the bus width.The amount of data that the CPU can process each time is called the word size (word size), and the size of the group is based on the design of the CPU and 32 bits in 64 bits. What we now call a computer is 32-bit or 64-bit based on the size of the word group parsed by this CP
NO WARRANTY, to the extent permitted by law.When you see your bumblebeed version is 3.2.1, congratulations, your computer comes with a power management feature out of the box, and it doesn't need to be set up.After installing the nvidia-settings, we may use the following command to set the display alone or to see the unique temperature.#调用nvidia显卡设置选项Optirun Nvidia-settings-c: 86. Verify that the bumblebee is working properly??????? After installation, restart the computer for Bumblebee to take
Why can't I establish an AP using madwifi in Fedora9? -- Linux general technology-Linux technology and application information. For details, refer to the following section. Recently, I tested in Fedora 9, inserted a wireless network card, Atheros AR5212, and installed madwifi. I wanted to use its AP mode to implement the soft AP function.
However, when I didn't set a password, the AP was set up, but other users could not access the AP, prompting th
, the content has passed the test. But if you are a bad boy (girl) and haven't participated in the RC test, let's take a look ."
It is reported that the 2.6.27 kernel upgrade has added the new file system UBIFS, which is dedicated to pure flash storage devices. In addition, it has greatly improved the scalability and performance of Direct I/O, the latency problem of ext4 is solved, and the queue network function, data integrity check, MMIO tracker are added to improve camera compatibility. Su
broadband routers is directly related to the network speed and stability of the entire network. Therefore, consumers are concerned about the performance of their products when purchasing ipvm wireless broadband routers. NETGEAR WPN824 wireless router is a relatively advanced technology product. It adopts the RangeMax smart MIMO technology of the network equipment company and has seven built-in antennas, it can further enhance the existing 802.11a/B/G network and improve the transmission efficie
Let's talk about the installation process of the Ethernet card driver on ASUSN6 series computers under Fedora18. The computer is ASUSN6 series, and the ethernet card model is AtherosAR8161/8165. The driver for Linux is not found on the official website of this Nic. Search for the installation of the NIC driver on the Internet. The final conclusion is that alxEthernetdriver is installed. AlxEthernetdriver URL: http://www.linuxfo
Let's talk about the installation process of the Ethernet card drive
For more information about how to set wireless NICs and kismet-Linux general technology-Linux technology and application, see the following. 1. About Wireless settings in the interface file
Wireless-essid ******
Wireless-mode Managed
Auto ath0
Iface ath0 inet dhcp
2. settings related to the source of kismet
Suiduser = root
Source = madwifi_ag, wifi0, Atheros
Note: wireless network card is atheros5212,sourcetypeis set in the kismetreadm
, drivers used by Atheros on new 802.11n Wireless Access Point devices, such as Linksys's WRT350N, cannot properly process certain management frame information units (WVE-2008-0008 ). This type of vulnerability is not uncommon. WLAN administrators only need to pay attention to the security bulletin and update the firmware and driver in time.
8. About the new MAC Architecture of 802.11n: one of these architectures is discovered to be extensible. Enable
Recently played a routing, is the TP-LINK wr841n hardware version V7
The routing is dual-antenna Mbps, And the chip is atheros ar7241, 4 m flash memory, 32 M memory. Note that the official ddwrt firmware of wr841n is not available. Although the wr841nd and reset buttons can be refreshed, the routing control interface cannot be connected once the configuration is incorrect, it is very troublesome to fix the TTL line.
After I brushed the ddwrt wr841
started without a blue screen, and the new hardware is automatically found.The original ATA/IDE Hard Drive channel has becomeSCSI and raid ControllersAMD ahci compatible RAID ControllerAMD raid Console
I put the three related files and descriptions and registration files here:
Http://download.csdn.net/detail/huanghanyu11/4346059
3. The Dell official website does not have any XP driver for this computer. This is annoying. What should I do? Find the driver from the machine,
The above drive
iwl4965 and iwl3945-atheros Corporation 5xxx chipset-Broadcom (Broadcom) 43xx-ralink (rayling) rt2x00 • Linux supports most of the drivers on the market • Each WiFi card is driven by firmware, in addition, the firmware corresponding to the same card working on different interfaces is different • Note: Many firmware are expensive • firmware is downloaded to the wireless card through its driver, to drive (10) General Software Architecture of wifi drive
Why 802.11ac will kill the 5 GHz Wi-Fi band
I took the opportunity during a recent briefing call with Qualcomm atheros (QCA) about its new 802.11ac devices to dig into some of the technical details behind 802.11ac. I'm gglad I did, because I learned a fewThings about the new higher-speed wireless standard that shoshould be more widely known.
As you may know, 802.11ac is5 GHz onlyStandard. The reason for this is that 11ac needs to use lots of 20 MHz
Article Title: wireless network adapter active in Linux. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source.
In order to experience the convenience of wireless networks, I purchased a laptop. However, the built-in PCI wireless network card does not have a driver in Linux, so it is useless.
By chance, I found the NdisWrapper Software Project (http://ndiswrapper.so
software, with few exceptions. These "special" software is updated frequently by their authors, and some include
Significant updates. We feel that it is useless to create static binary files for these types of tools. Users of these software should use SVN for Synchronous updates. These tools include
MSF, w2af, nikto, etc.
FAQs
-Ubiquity installer gave an error "language failed with exit code 10". Why?
-Ignore it. Believe me.
-Why is bt4's ISO file so large? What is the size of only half of prev
In Linux, the wireless network card is used to set up an AP. Due to the need of the experiment, we need to set up a Wireless AP. After a long time, we finally finished the setup. Www.2cto.com my machine is equipped with two NICs, the wired Nic is connected to the network through the network, and there is also a wireless Nic, as a Wireless AP. Because madwifi driver is used in my experiment, I can only use a NIC with an Atheros chip. In theory, it is o
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