tomcat ali

Description: After the Alibaba server installation system, the default swap is 0. This is the process record for configuring swap on the Ali server:1. Enter the cataloguecd/var/2. Get the block of swap files to add (here 1GB for example, Count = 1024x768 x 1024=1048576)DD If=/dev/zero of=swapfile bs=1024 count=10485763. Create swap Files/sbin/mkswapswapfile4. Activating swap Files/sbin/swaponswapfile (you can see the swap space now with the free comma

PrefaceThe Ali Wireless front-end team has performed a full-scale performance optimization for the business in the past year. The following is a summary of our experience based on the optimization guide, we hope to help.The first section includes only data-load-period optimizations.Picture controlFor Web pages, especially e-commerce pages, pictures usually occupy a lot of visual space, is the most important content of the page, and occupy the majority

the browser is IE or Firefox, with Ajax implementation.If you want to use Ajax to determine whether it is IE browser or Firefox browser, you should pass the XMLHttpRequest object.Let's start with a brief introduction to this object:(1) All modern browsers support XMLHttpRequest objects (IE5 and IE6 use ActiveXObject).(2) All modern browsers (ie7+, Firefox, Chrome, Safari, and Opera) have built-in XMLHttpRequest objects.Therefore, the author's understanding of the problem is to write a XMLHttpRe

1. Ali's English name Ali recently remembered an English name, so he looked up a lot of names on the Internet. He found that some names could be partly derived from two different names, such as John's prefix "John" and Robinson's suffix "Son", which was Johnson.Now he finds two favorite names (names can be treated as strings), with A and B, he wants to know a non-unprecedented prefix of a and a non-null suffix of B, and how many different strings

Still add link#include int main(){ puts("转载请注明出处[vmurder]谢谢"); puts("网址：blog.csdn.net/vmurder/article/details/44499259");}ExercisesPOPOQQQ has said it in detail.http://blog.csdn.net/PoPoQQQ/article/details/44495319Code:#include #include #include #include #define N 10100using namespace STD;intN,m;Long LongAns,x[n];intMain () {intI,j,k;intA,b,c;scanf("%d%d", n,m); for(i=1; iscanf("%d", a); ans-=a;x[i]=a1; } while(m--) {scanf("%d%d%d", a,b,c); Ans-=c,x[a]+=c,x[b]+=c; } sort (x+1, x+n+1); f

#include 　　Ali 2015 Internship A problem

to write a simple regular, not a complicated one, that's the point, it's going to take some time to learn.Here to borrow the answers of netizensvar reg = /^[a-za-z0-9_-][email protected][a-za-z0-9_-]+ (\.[ a-za-z0-9_-]+) +$/;9.p{*color: #000000;//ie7_color: #ff0000;//ie6Color: #00ff00;}10. varText = document.getElementsByTagName ("input") [0]; Text.addeventlistener ("Focus", Ofocus,false); Text.addeventlistener ("Blur", Oblur,false); functionOfocus () {if( This. value== "Please enter c

: /** * Project Name: * File Description: * Main Features: * Version number: 1.0 * Producer: LCX * creation time: 2015-8-25 **//** * @author LCX * */public class Pacetest {static random rand=new random ();p ublic static int pace () {return (int) (rand.nextdouble () *2+1);} public static void Main (string[] args) {Double sum=0;int times=10000;//experiment 10,000 times for (int i=0;i cross-examine 1, if the subject is starting from 2, then what is expected? same method: st

a cow and a program ape Xiao Yang every day to pick up his wife home from work. Xiao Yang at 6 o'clock on time from the company to start the car, due to possible traffic jams on the road, Xiao Yang to the wife of the company at the door of the time points evenly distributed between 6 points 20 to 6 points 30. Wife according to Xiao Yang's time to do estimates, to the company at the gate of the time points evenly distributed between 6 points 25 to 6 points 30, if the small Yang Bi wife arrived at

Read Among the optimizations:The optimization method is more common, 3,4 I know less, very interested. Keep Tracking down:So went online search ECDH and Session-ticket and Slight-ssl, which Slight-ssl is Ali self-built a set of technology. The ECDH:ECC algorithm is used in conjunction with DH for key negotiation, a key exchange algorithm called ECDH. The exchange parties can negotiate a key without sharing any secrets.Session-ticket: In session ticket

Reprint please specify the source 233:http://blog.csdn.net/vmurder/article/details/42875307This is a divine question.First we need to build an AC automaton and then build a fail tree, and then we findIf a string is asked to appear in the string B several times, then only need to look at the string B in the AC automaton all nodes in the number of nodes, in the end of a string in the tree of the fail trees can be.And that would be fine, but still not AC,Then we just need to follow the DFS sequence

indicates whether the data from the Zoo or the right stream, the column of the flow can be inconsistent, the subsequent can be linked to the aggregation of the batch or cross-batch operations. Mix () is an interface specifically designed for aggregate operations.Functionally, the operator layer can be analogous to the spark RDD. Spark RDD has two core values: one, at the API level, to circumvent the abstraction and uncomfortable native interfaces of the MapReduce model, providing a variety of t

There are two of Ali's services, one A has assigned an extranet IP, and the other B does not, how to let B with a to achieve the Internet?Handled as followsOn Server AIP tunnel Add i2o mode IPIP remote B local A---here A, B are intranet addressesIfconfig i2o 192.168.2.1 netmask 255.255.255.0On the B serverIP tunnel Add i2o mode Ipip remote a local B---here both A and B are intranet addressesIfconfig i2o 192.168.2.2 netmask 255.255.255.0This completes the IP tunneling between the two servers as w

. Additional ID columns have to be added to merge Zxs_gbrt_offline_section_two_13_1 and zxs_gbrt_offline_section_two_11_1 two tables to get similar user_id, Brand_id,y_val the table, take the threshold value to recommend it. Append the ID column code to the script provided in Xlab.Also: Attach the script implementation code to facilitate testing:watermark/2/text/ahr0cdovl2jsb2cuy3nkbi5uzxqvdtaxmdy5mtg5oa==/font/5a6l5l2t/fontsize/400/fill/i0jbqkfcma==/ Dissolve/70/gravity/southeast ">-----------_

Test instructions: The goal is to get a value of 1 of the gem, but the premise is to have a two-dimensional lattice from the outside to the gem of the path, if there is no need to choose a stone at a time to reduce its value by 1, until the stone value of 0 becomes the pathway, the premise of the choice of this stone is also a lattice outside to the Two people take turns, each time choose a stone, a starts first, asks by the input condition, who can win.Analysis:Game problem, the two people will

Ali front-End pen questions1, a table HTML code is as followsWhen the user presses the Delete button and deletes the row (TR) that is pressed, use native JavaScript implementations.2. Background:1. Object A directly invokes a method of object B to implement interactive logic. But the problem is that A and B are tightly coupled, and modifying B may invalidate the method of a call B.2. In order to solve the problem caused by coupling, we can design:Obje

RPC requests in distributed systems often occur in a disorderly sequence.Write an algorithm to order a sequence of sequential output. For example , suppose the starting sequence number is 1, for (1, 2, 5, 8, ten, 4, 3, 6, 9, 7) This sequence, the output is :123, 4, 567, 8, 9, 10??In the above example, when3 arrives, 4,5 is already there. The entire sequence (3, 4, 5) that already satisfies the order is therefore output to one line.??Requirements:1. write an efficient algorithm to complete the ab

ALi ct f 2015 write up 0x00 CakeCake is an Android question. The specific process is to input a string, initialize an array with a length of 16, and then combine the string with the array xor. So we only need to perform xor again and we will be OK.The Key is to look at the code in reverse order. If there are two keys to find the correct one, you can directly go to the code. a = [0, 3, 13, 19, 85, 5, 15, 78, 22, 7, 7, 68, 14, 5, 15, 42]b = 'bobdylan's

/stat.h, unistd.h, curl/curl.h, process.h Time limit : 1S ( in languages other than C + +: 3 S) memory limit : 128M ( languages other than C + +: 640 M)Input :The data contains 1 lines: The first line: the encoding of all products, separated by commas (half-width) Output :List of sorted commodity barcodes, separated by commas (half-width)Input Example :004hi090,004hi091, 004hz091, 004ky026 Output Example :004ky026,004hz091, 004hi091, 004hi090 1#include 2#include 3#include string.h>4#i

overflow zone 2, how HashMap in Java is implemented We can understand it as " array of list ". HashMap is actually implemented as a linear array, so the container that can be understood to store the data is a linear array.So how does a linear array implement key-value pairs to access data? Here HashMap has to do some processing.1. First hashmap inside a static inner class entry is implemented. Its important attributes are key, value, next, from the attribute Key,value we