Tags: query rdd make function object-oriented writing member map compilationPreface: Some logic with spark core to write, it will be more trouble, if the use of SQL to express, it is too convenientFirst, what is Spark SQLis a Spark component that specifically handles structured data Spark SQL provides two ways to manipulate data: SQL query Dataframes/datasets API Spark SQL = Schema + RDDSecond, Spark SQL introduced the main motiveWrite and run spark programs faster Write less code, read less dat
. When configuring SPAN, we need to provide the source port, VLAN number, and target port.
4000/6000 CatOS switch:Setspan6/176/19 // SPAN: the source port is 6/17, and the target port is 6/19.
2950/3550/IOS/6000IOS switch:Monitorsession1local // SPANMonitorsession1sourceinterfacefastethernet0/17 both // source port, or a VLANMonitorsession1destinationinterfacefastethernet0/19 // target port
2900/3500 XL switch:Interfacefastethernet0/19 // target portP
Preface
At around this morning (20091120), I listened to the Chrome conference in the United States with friends from the QQ group (75448027). After some experiments, finally, ChromeOS is successfully run in the Virtual Machine of your PC. This article aims to help all friends who are interested in ChromeOS to experience ChromeOS in a more interesting way.Environment/preparation
Windows XP/2003 (other versions have not been tested, but do not mean they cannot be used)
Sun VirtualBox: http://w
working at the same time, whichever is the longest, one months is completed.4, code development: estimated that the entire software implementation of the code line number in 100,000 rows or so. Considering that programmers are college graduates, coding ability in 500 lines a day, due to the pairing factor, the team can complete 800 lines of code per day, so the team can complete the number of lines of code per day is 800*3+500 = 2900 lines of code, i
AI part of the existing API can be called, the other design will not be too difficult, as for Bing Radio, there is not much to achieve their own things, so the difficulty is not too big, half a month to one months should be able to achieve. The front-end UI might be a little more thoughtful, because a friendly interface might need to be modified over and over, with an estimated one-month plan. Since three teams are working at the same time, whichever is the longest, one months is completed.4, c
and average wage in emp grouped by deptno The group function has AVG (..) averaging sum (..) Sum count (...) Count Max (..) To find the maximum value Min (..) Find the minimum value StdDev (..) Standard deviation Variance (..) Variance 5. HAVING clause SELECT Deptno, Max (SAL) from EMPGROUP by DeptnoHaving Max (SAL) >2900 shows the EMP table grouped by Deptno maximum wage greater than 2900 The having funct
system, in addition, even when a worm occurs, we need to take measures to minimize its impact and protect our network infrastructure to ensure stable network operation ..
This article describes a unique solution on a Cisco Catalyst Switch to prevent the harm of worms in a very economical, effective, and scalable way.
First, we need to understand the abnormal behavior of the worm and have the means to detect its abnormal behavior as soon as possible.
are suitable for the access layer or small and medium size convergence layer. Mainstream third-tier switches on the market include Cisco Catalyst 2948G-L3, Extreme Summit24, AlliedTelesyn Rapier24, and so on. These three-tier switch products have their own characteristics, covers most of the application features of layer-3 switches. Of course, when selecting a layer-3 switch, you can determine and select the products of the above products or other ma
optimization part, which is optional, but we recommend that you do so.
Prerequisites
The process for configuring iSCSI on AIX assumes that the following conditions are met:
AIX version 5.2 or later is installed on the server or host node.
Cabling of all networks and optical fibers has been completed.
Most importantly, the network configuration has been completed and tested, including the ability to perform Ping tests from the AIX node to the iSCSI IP address.
Basic configurations include:
3. Basic vswitch Configuration
After entering the configuration page, if this is the first configuration, You need to configure the IP address first, which is mainly for remote configuration later. The IP address configuration method is as follows:
Enter "I" in "Enter Selection:" On the configuration page that appears, and click Enter. The following configuration information is displayed:
The IP Configuration Menu appears.
Catalyst 1900-IP Configurati
Ubuntulinux off the dedicated display/switch graphics card-installation of atidriver cause: linux CPU temperature is very high, fan conversion platform: ubuntu12.1032/64bit driver: unzip s12.11-atidriver 1. download ati compressed package amd-driver-installer-catalyst-12.11-beta-x86.x86 _... in ubuntu linux, disable the dedicated display/switch the graphics card-the reason for installing the atidriver: the CPU temperature in linux is very high, and th
I installed my Fedora 18 on my laptop, AMD Radeon 6600 M and 6700 M Series. This is the result detected after the driver is installed (I always thought it was 76 Series, because the label is so pasted, I did not expect it to be pitted.) Let's Talk About the installation steps in detail.
If the driver has been installed using the run file provided by AMD, uninstall and fix the Mesa Library:
Su-c 'yum reinstall mesa-libGL'
Setp 1: Update Kernel, Install kernel-devel
[Root @ fedora ~] $ Yum update
There are many ways to do it online, but there are few solutions for AMD graphics, so I would like to write a tutorial on AMD graphics today.First of all, go to this URL to download some things: http://support.amd.com/zh-cn/download/desktop?os=Ubuntu+x86+64, explained that this URL is for the Ubuntu64 bit system, 32-bit users please select the 32-bit file download. Which files are under?There are three of them:(1) AMD catalyst™14.12 proprietary Ubuntu
This experiment needs:
By planning VLAN 100 and VLAN 200 in Cisco Catalyst 3550来, and configuring DHCP to have the VLAN100 personnel computer obtain an IP address for 192.168.0.0/ 24, let VLAN200 market computer to obtain IP address for 172.16.0.0/24. Because the marketing department and the Ministry of Personnel because of business relationship, need two servers to communicate with each other, where also need to configure the VLAN in 3550 to communi
Since last year, Spark's Submit Michael Armbrust shared his catalyst, more than 1 years, spark SQL contributor from a few people to dozens of people, and the development speed is extremely rapid, the reason, personally think there are the following 2 points:1. Integration: The SQL Type Query language is integrated into Spark's core RDD concept. This can be applied to a variety of tasks, stream processing, batch processing, including machine learning c
original network equipment, the connection between the ATM and Gigabit Ethernet networking technologies is involved, this article introduces the solution to this problem based on our practical experience.
During the Phase I project construction of our campus network, the backbone uses the ATM technology and installs a certain number of network devices. The backbone switch uses the 3COM Corebilder 7000HD, which currently works normally. In the phase II project construction, the backbone adopts t
graphics card used by the author is ATi MOBILITY Radeon X1300. After the Fedora Core 8 is installed, no settings have been made, and the catalyst driver is directly installed. After the installation, perform necessary settings, restart after the configuration, and enable the desktop effect under Gnome after the restart. Now, you can use the 3D desktop. The entire process is not complex, right? Anyone who has experience using Linux knows that the more
multi-purpose Breakout trunk cable that is sufficient to support the communication capacity of several buildings is used to separate several small-capacity optical cables through the distribution frame, extend to the wiring room of each floor. In terms of application, backup, and resizing, due to the limited distance between multi-mode optical fiber for future Gigabit Ethernet and ATM Gbps support, therefore, from the network center to the branch Decreasing End Point, 36 or 48-core Single-Mode
management and Cisco Storage Area Network (SAN.
The steps in this process are related to the Cisco Fabric Manager configuration, Cisco Device Manager configuration, and AIX host configuration. We also provide the AIX optimization part, which is optional, but we recommend that you do so.
Prerequisites
The process for configuring iSCSI on AIX assumes that the following conditions are met:
AIX Version 5.2 or later is installed on the server or host node.
Cabling of all networks and optical fib
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