pt hub

CISCO PT Simulation Experiment (13) router RIP dynamic routing configurationExperimental Purpose :The configuration method of mastering RIP Dynamic route selection protocolMastering RIP routing descriptions in routing tablesFamiliar with the principle and process of Routing and Packet forwardingExperimental Background : The company is connected to the export router of the enterprise network through a three-layer switch, isp The other router of

CISCO PT Simulation Experiment (12) configuration of router static routesExperimental Purpose : Master the configuration method and application of static routeMastering Route descriptions in the routing tableFamiliar with the principle and process of Routing and Packet forwardingExperimental Background :In addition to the headquarters of a company, there is another branch, and there is a separate LAN, in order to enable the company's departments can

CISCO PT Simulation Experiment (16) Router redistribution configurationExperimental Purpose :Learn how to configure router redistributionLearn to see routes generated by routing redistribution learningExperimental Background :with the expansion of the company's network, the company installed a number of routers and run a variety of routing protocols, including the company 's export router R2 with a router outside the company R3 connection, three-layer

Pt-kill is a very simple tool to kill MySQL threads and queries. The main purpose is to prevent some long queries from consuming system resources for long periods of time, while affecting the online business. Main function: Get the connection that satisfies the condition from show processlist or read the connection that satisfies the condition from the file containing show processlist and print or kill or perform other actions.Our main use here is t

Objective: In general operations work often encounter such a scenario, the server's IO load is very high (util in iostat), but unable to quickly locate the IO load source process and source files resulting in the inability to make the appropriate policy to solve the problem. This phenomenon is more common on MySQL, and before 5.6 (Performance_schema provides IO instrument), we can usually only guess the high IO caused by MySQL, but we can't pinpoint which file is the load. For exampl

"Use" online change chart"Note the risk" because it involves modifying the table's data and structure, so be careful to test and backup before use, the tool will not change the table by default, unless you add the--execute parameter"Introduction to Tools"Pt-osc imitate MySQL internal change table way to change the table, but the whole process of the table is through the copy of the original table, that is, in the process of changing the table is not l

In windows, mysql5620 used mysqldumpslowpl to analyze slow logs. Today, we see a tool pt-query-digest, which was originally intended to be installed and used on windows. The result is to run C on windows: before ProgramFilesMySQLMySQLServer56b, mysql5.6.20 in windows used mysqldumpslow. pl analyzes slow logs. Today, we see pt-query-digest, which was originally intended to be installed and used on windows. T

MySQL Performance Profiling Tool (pt-query-digest) is also from percona-toolkit Other tools in this tool set Troubleshooting of abnormal shutdown of MySQL Slave (pt-slave-restart) Including 1. slow log (default) 2. tcpdump 3. general log 4. binlog 5. show processlist The experiment simulates a certain amount of pressure through tpcc, and enables binlog, general log, slow log, and tcpdump to collect log

accuracy of the value of floating point is limited. I wonder if there is any other explanation.　　Description of the Unit PTIn print layout, point is an absolute value, which is equal to 1/72 inches, which can be measured by a ruler, in physical inches. But in CSS the meaning of PT is not so. Because our display is divided into pixels, a single pixel can only have one color (in order to simplify, the sub-pixel anti-aliasing technique is not discussed

CISCO PT Simulation Experiment (11) router single-arm routing configurationExperimental Purpose : Master The configuration method of single-arm routingImplementing different VLANs to communicate with each otherIn-depth understanding of VLAN communication Principles and routing sub-interfacesExperimental Background :the company's technical and sales departments in different offices, technical department and sales Department of the PC in different VLAN,

CISCO PT Simulation Experiment (18) router DHCP server and relay configurationExperimental Purpose :Master the configuration method of router DHCP serverMaster the configuration method of DHCP relay AgentMastering the DHCP protocol and the principle and implementation process of the relayExperimental Background : with the expansion of the company's network, more and more office computers in the company, the original fixed IP access scheme is no longer

CISCO PT Simulation Experiment (15) loopback Telnet configuration for routersExperimental Purpose :Mastering the features and functions of router loopback interfaceMaster the configuration of the Loopback interface to achieve Telnet login to the routerMastering the basic configuration of RIP dynamic Routing and default routingExperimental Background : as the network environment of the company is becoming more and more complex, as a network administrat

CISCO PT Simulation Experiment (19) NAT feature configuration for routersExperimental Purpose :Mastering the principle and function of NAT network address translationMaster the configuration of static NAT to achieve LAN access to the InternetMastering the principle of wide area network (WAN) access technologyExperimental Background : in order to adapt to the company's growing business needs, the company wants to publish the website through the Web ser

On the Apple iphone 6s screen parameters I believe that everyone will not be unfamiliar, the size of 4.7 inches, 1334 x 750 resolution so that its PPI reached 326 SP and PX Conversion formula: sp*ppi/160 = pxConclusion:PX = dp*ppi/160DP = PX/(ppi/160)PX = sp*ppi/160SP = px/(ppi/160) The DPI and PPI are both density units, not units of measure, and these two are precisely the important denominator in our conversion. Simply understand: PPI (pixels per inch): Image resolution (number of pixels in a

Current Pt-slave-restart The latest version is 2.2.19, when you perform the following command to skip the primary key conflict, you will get an error.# Pt-slave-restart--user=root--error-numbers=1062 dbd::mysql::d b selectrow_arrayref failed:unknown system variable ' Gtid_mode ' [For Statement ' SELECT @ @GLOBAL. Gtid_mode "] At/usr/local/bin/pt-slave-restart lin

Tags: pt-table-checksumsOfficial website: https://www.percona.com/doc/percona-toolkit/2.1/pt-table-checksum.html#dsn-optionsEnvironmentMaster: 10.50.12.33From: 10.50.12.35Simulation **************************************** of master-slave difference phenomenonMain:mysql> CREATE DATABASE Gaoquan;mysql> use Gaoquan;mysql> CREATE TABLE t1 (id int PRIMARY KEY NOT null auto_increment,name varchar (TEN), age int)

In advance, I use a virtual machine to do CentOS6.7, the host is WINDOWS10, mainly with CentOS to install software and operation.As operations staff master MySQL "Delete and change" is a must, and then learn a little optimization is good, MySQL comes with a "slow check file" thing, but that thing is very basic, although very good operation but the ability is very limited, so pt-query-digest tools came into being, This software is only available in Lin

In CSS stylesheets, we often see the length units such as PT, Px,em,ex, in, and so on. What do they mean, what's the difference? I wrote another HTML example to test cm. In a CSS stylesheet, the length units are divided into two types: Relative length units, such as PX, EM, etc. Absolute length units, such as PT,MM, etc. Also talk about the difference between PX and PT