Linux uses FIO to test the IOPS of the disk 2013-09-23 10:59:21Category: LINUXFio is a great tool for testing IOPS, which is used for stress testing and validation of hardware, supporting 13 different I/O engines, including: Sync,mmap, Libaio, Posixaio, SG v3, splice, NULL, network, Syslet, Guasi, Solarisaio and so on.FIO website Address: http://freshmeat.net/projects/fio/One, FIO installationwget http://brick.kernel.dk/snaps/fio-2.0.7.tar.gzYum Install Libaio-develTAR-ZXVF fio-2.0.7.tar.gzCD fi
intelligent routing, the survey shows that most consumers show a certain perception of intelligent routing, and that the wireless performance of a router is more important than the one that can choose intelligent route in a certain range of price. The visible router market pain point is still focused on the poor quality of the wireless signal.
Gigabit Dual-frequency routing as a future trend
802.11AC dual-Frequency router is a newly born new wireless standard product, its birth in order to
In oracle10g, the default archive path is $oracle_base/flash_recovery_area. For this path, Oracle has a qualification that only 2G of space is available to the archive log by default, and you can use the following two SQL statements to view its qualification:
1. Select * from V$recovery_file_dest;
2. Show parameter db_recovery_file_dest (this friendlier and more intuitive)
When the number of archived logs is greater than 2G, it is incorrect to report that there is no more room to accommodate
FreeHost10 5G free PHP space to support FTP
The free php space size is: 5GB;
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Support PHP5, provide 5 MySQL database, and can manage database through phpMyAdmin;
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K2free Support FTP foreign 5G free PHP space
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the correct password entered the account, click
Next . The following figure:
If the router detects dynamic IP or fixed-IP internet access, set it up according to the page tip.
Note : 76% users because of the broadband account password error caused no access to the Internet, please carefully check the broadband account password is correct, pay attention to Chinese and English input, letter case, suffix, etc. whether the input integrity.
5
, set Wireless p
code of the relevant units as well as LINTEL, DQ and other great gods contribution: https://github.com/qdk0901/openwrt-mt7620
Known Issues:1, unable to configure wireless via Luci. This is the original Ralink-driven mishap, please refer to the example configuration/etc/config/wireless below.2, 5G drive using samba will be smoked, pandorabox also have this problem, see http://www.right.com.cn/forum/thread-149292-1-1.html#pid936103.
change history:
201
LVM logical volumes, which may consist of one or more hard disks or partitions, can safely delete hard drives or partitions in logical volumes. Applicable to the scene, I have two small hard drives, I would like to change one of the small hard drive to large. First of all, the logical volume of small hard disk, safely removed. The following is a detailed procedure for the operation.
1, view the partition situation
[Root@iz94zz3wqciz data]# Df-hFileSystem Size Used Avail use% mounted on/DEV/XVD
The idea of optical network bandwidth operation is to make full use of the existing network resources and construct a bandwidth service network to provide real-time, end-to-end and variable bandwidth services.
The traditional transmission network has many defects, which is based on the narrow-band TDM service. Lack of broadband services, data services support, the availability of multiple types of bandwidth bottlenecks; online bandwidth delivery is slow, providing an end-to-end business needs t
INTERFACE, radio0-802.11n 2.4GHz and radio1-802.11n 5GHz are set here.A. By default, it is not turned on,B. On this page, click Setting, select Enable Radio here, and click Apply in the lower right corner.C. Then, return to radio0-802.11n 2.4G status and view the status, and you can see that the soft status becomes the Enabled,hardware status to up. This enables the wireless capability of the 2.4G band.3. Encryption settingsSecurity-encryption Manager, opening cipher to AES CCMP at 2.4G and
The SWAP installed on oracle11 must be above 2.57G. Therefore, when installing centos, make sure that swap is larger than 2.57G.
The SWAP installed on oracle11 must be above 2.57G. Therefore, when installing centos, make sure that swap is larger than 2.57G.
I. Runtime Environment Note: The SWAP installed on Oracle11 must be above 2.57G. Therefore, when installing CentOS, make sure that the swap is larger than 2.57G. System Environment: centos 5.6 32-bit (graphical installation)Hard Disk Par
Tool Selection I. Sqlyog is a powerful tool, but in the face of a 5G database, it can only strike, simply put, the local import can be, from the local import server can not.II. Phpadmin comes with this, but it's okay, but it's never used in the end, because it's invisible, because up to 50 MB, although you can modify the configuration file to upload but 5 GB, forget it, no confidence.3. Another is a PHP script. It seems to be written by Germans. This
= windows.storage.applicationdata.current.roamingsettings;roaming. values["key"" roaming settings ";// Roaming folders var roamingfolder = Windows.Storage.ApplicationData.Current.RoamingFolder; // create a file within the roaming folder, var await roamingfolder.createfileasync (filename, creationcollisionoption.openifexists); // Write Content " content that needs to be synced ");If your data is small, such as some basic settings, as well as the user name password and other small files, with thi
omitted), and 802.11a/B/E/g/h/I ..... and so on. I will focus on 802.11a/B/E/g/h/I.
802.11aThe High-Speed WLAN protocol uses the 5G Hz band. The maximum speed is 54 Mbps. The actual usage rate is about 22-26 Mbps. Strong anti-interference capability and fast transmission rate. Because of the high frequency, the transmission distance is greatly reduced. Being incompatible with 802.11b is the biggest drawback.
802.11bCurrently, the most popular WLAN pr
xshell to log on to www1
> SSH 172.16.14.1
3) modify the host configuration file
# Vim/etc/sysconfig/network // modify the following line
Hostname = www1.dean.com
# Hostname www1.dean.com
# Vim/etc/hosts // Add the following line
172.16.14.1 www1.dean.com www1
The host name has been changed to www1.
# Login
> SSH 172.16.14.1
[Root @ www1 ~] #
In the same step as www2, change the host name to www2 (IP configuration to 172.16.14.2)
[Root @ www2 ~] #
Iii. Configure the NFS server and install the
I. Configuration
CPU: 4790 KB
Motherboard: ASUS Z97-K.
Memory: 8 GB of veganp DDR3-1600
Video Card: MSI r7850 TF 2gd5
Power Supply: antike vp500
Radiator: Big cream Tower
Hard Disk: Seagate st1000dm003 1 Tb
Ii. Standby running points
1. 3dmark11
2. Master Lu
3. Standby temperature (big tower)
Iii. overclocking Test
1. Mo dian (maximum 1.2 V) 4.7G
Temperature 6 minutes after stress testing
1 million running points
Chess running score
2. Mo Dian 4.8g
The temperature is basically the same
actually includes step 2 .)Reference answer: Same as above.
Questions extended:1. There are 10 bottles of pills, some of which contain overweight pills. Ordinary pills 5g/tablet, overweight pills 6g/tablet, the number of pills per bottle is the same. Please use only one balance, once, to find out which bottles contain overweight pills. (Answer: Take 1, 2, 4, 8, 16, 32, 64, 128, 256, and 512 pills respectively) 2. There are n bottles of pills, some of
it is an iso image file on the internet, pay attention to the supported CPU, some of which are 64-bit. The specific analysis depends on your hardware configuration, and you can simply dial the disk after the download, that's what I got.
(2) are two new drives of the proper size available under Windows 7? According to your personal preferences, I use 20G and 5G. It is best to format the score in Fat32 format.
After completing these steps, you can star
Domestic can not directly login ins, but the small part of the way, here to share the method to everyone, easy to remember points like column1. Need auxiliary Work *: 5G Accelerator, Android Apple Mac All devices can be downloaded2 Niang Search: 5G accelerated organ Network (can find me on the official website Penguin contact me), into the official website, download management, one-click Download after inst
eat 1 GB of memory on the server.During Flash upload, the entire file is added to the memory, which is a serious problem. Because if you want to upload 5G files, Flash will also load all 5G files into the memory. This will seriously affect the user experience. This is because the user's computer is in a false state. Generally, the user's computer is 2 GB, so the user crashes directly, the memory is insuffi
executing the task for more than an hour... Hello, one hour of execution is because there are too many files to be downloaded, because I downloaded them cyclically. where to stop the download, and where to download it next time? Okay, I don't know how to make the PHP program that downloads 5G Files run stably for several hours. All of the above are circular crawling solutions. if you want to use one capture, you cannot provide valid suggestions. Ok
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