一站式的上云学习：云资讯，快速入门，企业上云案例，最佳实践
阿里云HybridDB for PostgreSQL内存与负载管理...
标签 PostgreSQL,Greenplum,阿里云HybridDB for PostgreSQL,内存管理,OOM,操作系统内核参数 资源队列,数据库内存保护参数 背景 Greenplum是一个重计算和重资源的MPP数据库，可谓有多少资源就能消耗多少资源，带来的...
MaxCompute访问TableStore(OTS)数据（20170601更新）
0.前言#MaxCompute作为阿里云大数据平台的核心计算组件，承担了集团内外大部分的分布式计算需求。而MaxCompute SQL作为分布式数据处理的主要入口，为快速方便处理/存储EB级别的离线数据提供了强有力的支持。随着大...
看速八能不睡着，大概只因为这个镜头！
就阿里巴巴和阿里云来说，一直在对物联网设备的攻击方和防御方、传感器的安全、和智能设备安全进行研究。在未来，智能车辆会涉及到很多电子单元的安全，比如踩刹车的这个过程，其实是由微电子系统控制信号传输到电子...
支持物联网！SAP HANA云平台再升级
SAP在其2015年Sapphire会议上发布了云版本的HANA，这是一个支持物联网（loT）业务的列式数据库——被称为SAP HANA云平台。SAP首席技术官Bernd Leukert在主题演讲中宣布了这一进展。他表示，S/4 HANA现在已经支持多达...
Apache RocketMQ背后的设计思路与最佳实践
摘要：为了更好地让开发者们更加深入了解阿里开源，阿里云云栖社区在3月1号了举办“阿里开源项目最佳实践”在线技术峰会，直播讲述了当前阿里新兴和经典开源项目实战经验以及背后的开发思路。在本次在线技术峰会上，...
开发者大会优先谈云，对于微软Win10还重要吗
loT物联网，Mac版Visual Studio、智能会议、内置Cortana的Invoke音箱、Microsoft Graph等各项服务或应用也都纷纷登场。整个Keynote看下来，虽然节奏紧凑、内容丰富，但大多都只与开发者有关，与普通用户更为关心的...
MaxCompute上如何处理非结构化数据
MaxCompute作为阿里云大数据平台的核心计算组件，拥有强大的计算能力，能够调度大量的节点做并行计算，同时对分布式计算中的failover，重试等均有一套行之有效的处理管理机制。而MaxCompute SQL能在简明的语义上实现...
【云栖大会】AliOS总裁胡晓明：非智联网汽车将成为...
此外，阿里巴巴集团资深副总裁、阿里云总裁胡晓明今天第一次以AliOS总裁身份亮相，宣布AliOS即将开源开放，并号召行业伙伴共同建设一个“大家的操作系统”。AliOS不只是阿里巴巴的，它会变成大家的OS。阿里会关注最...
HDOJ(HDU)2138 How many prime numbers(素数-快速筛选...
Problem Description Give you a lot of positive integers,just to find out how many prime numbers there are.Input There are a lot of cases.In each case, there is an integer N representing the number of ...
简明Python3教程 2.序言
Python也许是为数不多的既简单又强大的编程语言。这有利于新手甚至于专家，更重要的是用它编程所带来的乐趣...修订版 购买地址1 购买地址2 PYTHON核心编程 购买地址1 购买地址2 零基础学Python 购买地址1 购买地址2
SQL疑难杂症【5】大量数据查询的时候要考虑结果为空的...
SELECT TOP 1 LOT_ID FROM QS_WIP(NOLOCK)WHERE STATION_ID='FB808A1E-5758-43B3-B243-8C728ACC5264' AND ROUTE_STEP_ID='29F813DC-2204-4413-9FB6-0DBF1982F33F' order by END_TIME desc 看似简单的SQL语句，却执行...
HDOJ 1064Financial Management
making a lot of money,but somehow never seems to have enough.Larry has decided that he needs to grab hold of his financial portfolio and solve his financing problems.The first step is to figure out ...
物联网市场将迎爆炸式增长
3月3日，东华软件正式宣布与美国物联网技术公司C3 LoT建立战略合作伙伴关系，双方将致力于推动中国能源互联网、工业大数据领域的建设及数字化转型。据悉，利用C3公司经实践检验的，基于弹性云计算、大数据分析和机器...
HDOJ(HDU)2132 An easy problem
Problem Description We once did a lot of recursional problem.I think some of them is easy for you and some if hard for you.Now there is a very easy problem I think you can AC it.We can define sum(n)as...
你应该知道的最好Webmail邮件客户端，
to look a lot like gmail and to be easily deployable on a single server.It’s written in Javascript with Angularjs for the frontend,and in Python 2 for the backend.It is released under BSD-license....
HDU 1213
Ignatius' birthday.He invites a lot of friends.Now it's dinner time.Ignatius wants to know how many tables he needs at least.You have to notice that not all the friends know each other,and all the ...
Undoing Merges
upcoming features.There has actually been a lot of cool stuff that has happened since the book was first published,and a number of interesting things that I didn't get around to covering in the book.I...
HDOJ(HDU)1563 Find your present!...
present”.Now it’s your turn to get your special present,a lot of presents now putting on the desk,and only one of them will be yours.Each present has a card number on it,and your present’s card ...
集成剪枝分类算法的Bagging集成学习算法示例
aggregating a lot of prunnings we are able to create a powerful classifier.The process of Bagging based on pruning is really simple but not trivial:For j=1,…,bj=1,\dots,b,Pick up mm samples from a ...
《验收测试驱动开发：ATDD实例详解》—第2章2.1节第一...
parking lot calculator calculates costs for Valet Parking.3 4 Scenario: Calculate Valet Parking Cost for half an hour 5 When I park my car in the Valet Parking Lot for 30 minutes 6 Then I will have...
10 good shell scripting practices
practicing,we cannot correlate lot of things,and it does not add much value to your study either.This learn-practice-stuck method helps me a lot.2.Try at the command prompt:Some times,we get some ...
EF-InvalidOperation系列
附加类型“LoT.Model.ArticleType”的实体失败，因为相同类型的其他实体已具有相同的主键值。在使用"Attach 方法或者将实体的状态设置为"Unchanged"或"Modified 时如果图形中的任何实体具有冲突键值，则可能会发生...
物联网或迎爆发式增长 爱立信加快布局窄带物联网
要实现众多垂直领域物联网应用场景，在网络层面，除了窄带物联网技术的支持外，5G技术的发展将有利于关键任务类的物联网应用场景，如远程医疗、远程驾驶、无人机控制以及云机器人（300024）。常刚向记者表示：“5G将...
You should blog even if you have no readers-Nathan...
behind a post's argument,I get a lot more value out of reading.I'm also more aware of the style of good writers.I mentally take note of the ways good writers phrase their ideas.I'd always enjoyed ...
《验收测试驱动开发：ATDD实例详解》—第2章2.3节表格...
parking lot calculator can calculate costs for Valet Parking.3 4 Scenario Outline:Calculate Valet Parking Cost 5 When I park my car in the Valet Parking Lot for 6 Then I will have to pay 7 8 ...
Redis和Memcache对比及选择
with big values in the order of 100k.Redis recently improved a lot about big values(unstable branch)but still memcached is faster in this use case.The point here is:nor one or the other will likely ...
用大数据解放科学家,学术更简单
have achieved a lot and weovercome a lot of those communication limitations.8. Our big data digest has over 150 thousands followers who are interested or currently working in various big data fields....
漫画：为什么搞计算机工作的人总是看上去很清闲（转）
对于这幅漫画我没什么好说的，因为当你看着它是就会自然的感到其中的乐趣。也许你的计算机专业的员工、亲属，...http://www.vaikan.com/reasons-why-people-who-work-with-computers-seem-to-have-lot-of-spare-time/
最大匹配-HDOJ 2458 Kindergarten
In a kindergarten,there are a lot of kids.All girls of the kids know each other and all boys also know each other.In addition to that,some girls and boys know each other....
A simple demo for WDM Driver development
Introduction A lot of articles have been investigating in application layer issues,like skin-based dialogs,MFC,ATL,thread,process,registry etc.It won't be easy to find any driver related articles ...
How to Prevent WordPress Bounce Attacks with an ...
lot from it when we take a deep dive into its technical make up and can better understand the logic and features of a bounce attack.This article aims to offer a bit more insight into bounce attacks ...
Oracle游标的查询
PL/SQL keeps open.If you use a lot of stored procedures,then you will see lot of cached cursors.From release 8.1,PL/SQL will close these cached cursors on commit.You can find the list of open cursors ...
DataGridView减少闪烁的解决办法
that there is lot of blinking,flicker,pulling.After badly hitting my head with Google,I found a very easy way.We just need to create a extension method to DataGridView and it's all done:Collapse ...
PostgreSQL 10.0 preview 性能增强-OLAP提速框架,...
expression evaluation puts a*lot*of pressure on the stack.2)There's a lot of indirect function calls when recursing to other expression nodes.These are hard to predict,because the same node type(say ...
英特尔专家告诉你 信息时代如何掌控数据安全（附视频&...
李志强最后总结提到，SGX在云上将有广泛的应用前景，通过SGX对数据和代码提供CPU层级的沙箱保护能力，云可以分成信任云和非信任云两部分，对于合法云服务提供商提供的可信云服务，用户可以放心地把数据如密钥、信息...
google的面试要求（自己的标杆）
on a lot of SDE interview loops lately where thecandidate failed miserably: not-inclined votes all around,even fromthe phone screeners who brought the person in initially.It's usually pretty obvious ...
印度初创公司开发了下一代区块链网络安全解决方法
据美国市场研究公司Gartner的数据，全球IT安全支出增长到1485美元（655亿+830亿），从2013年的655亿美元到2016年的830亿美元，其中云安全领域预计增长了50%。然而，尽管全球IT安全支出正在大幅上升，但是由于现有的...
简明Python3教程 首页
find a tutorial as good as yours for java that would help me a lot.Thanx.- Ahmed Mohammed(sedo-underscore-91-at-hotmail-dot-com)A wonderful resource for beginners wanting to learn more about Python is...
CB INSIGHT权威发布：一文看懂印度IT巨头的投资偏好
在中国，阿里、腾讯、百度等都在云计算、大数据等方面大规模地投入研发，而国外的巨头、亚马逊、微软、谷歌都纷纷攻城略地。为了避免失去优势地位，正在紧锣密鼓投资和收购云计算、大数据、自动化等高新技术创业公司...
GitHub优质资源大集合
本次的GitHub优质资源大集合中涵盖了物联网（loT）、MySQL、Hadoop、MongoDB以及各种机器学习和大数据还有数据可视化的优质资源，精彩内容不容错过！So,Let's build software better,together!史上最全的物联网资料 ...
如何申请试用MaxCompute 2.0
odps.sql.planner.mode=lot或者hybrid)，允许在order by,cluster by,distribute by,sort by中引用select列表中不存在的列，MaxCompute&2.0与Hive兼容，不允许此种用法。表达式中,case的表达式和when中的条件如果类型...
java.net.SocketTimeoutException: Read timed out
that JedisPool inherits commons-pool BaseObjectPoolConfig which has a lot of configuration parameters.We've set some defined ones which suit most of the cases.In case,you experience issues ...
ORACLE SQL调优案例一则
但是SC_LOT表还是走全表扫描，经过分析发现SC_LOT表的PO_NO列的区分度非常大，应该可以通过建立索引优化。如下所示，建立索引后，SC_LOT不走全表扫描了。执行计划的代价（Cost）也从7014降为了254. 优化的效果非常...
subversion SVN global ignore pattern
o*.lo*.la*.al.libs*.so*.so.[0-9]*.a*.pyc*.pyo*.rej*#*#.#* swp.DS_Store*/bin*/obj*/Release*/Debug*.suo*.err*.log*.obj*.bin ...bbl*.blg*.bst*.dvi*.idx*.lof*.log*.pdf*.toc*.asv*.class*.bak*.lot
Intel张建：优化Ceph效能的最佳实务技巧
lot of interests from community,a few companies decided to adopt in production. 所以，第一点是越来越独到了。第二通过前面的案例分析可以看到，需要优化。第三ceph开辟新的领域，但还需要优化，进一步发挥出来...
《验收测试驱动开发：ATDD实例详解》—第2章2.2节结对...
select(parking_lot)22@page.select@lotIdentifier,parking_lot 23 end 24 25 def enter_parking_duration(duration)26 startingDate,startingTime, startingTimeAMPM,leavingDate,leavingTime,leavingTimeAMPM= ...
在YARN中，如何控制和监控map/reduce的并发数
in use/demanded 2.Using the web UI you can get lot of monitoring/admin kind of info:NameNode-http://:50070/& Resource Manager - http://:8088/ 其他配置参考：There is a&good guide&on YARN configuration ...
redis4.0之MEMORY命令详解
result from a workload that causes the allocator to fragment memory a lot.If the problem is a large peak memory,then there is no issue.Otherwise,make sure you are using the Jemalloc allocator and not ...
WebPagetest网页前端性能测试工具和实现分析
wrote the code but doesn’t help a lot if you are trying to spy on software that you don’t control which leads us to…Code Injection Lucky for me,Windows provides several ways to inject arbitrary ...
使用 Toad 实现 SQL 优化
optimizer help us a lot,master SQL tuning we should have deep understand such like sql execution plan,auto trace statistics,table join,index and so on. The demo is based on Toad for Oracle 10.5.0.41 ...
RAC中的等待事件
it may be assumed that thefrequently used SQL causes a lot of disk I/O(in the event of the cr grant)or that theworkload inserts a lot of data and needs to find and format new blocks frequently(inthe ...
WCF、Web API、WCF REST 和 Web Service 的区别
services such as Web Service,WCF and now Web API.There are a lot of articles over the internet which may describe to whom you should use.Now a days,you have a lot of choices to build ...
3.2.patch-apply a diff file to an original
p0例&3.2.&a lot of file or directory$diff –uNr dir.old dir.new my.patch$patch-p1原文出处：Netkiller 系列 手札 本文作者：陈景峯 转载请与作者联系，同时请务必标明文章原始出处和作者信息及本声明。
EF-DbUpdateException-实体类和数据库列不对应的解决...
System.Data.Entity.DbContext.SaveChanges()在 LoT.Dal.BaseDal`1.AddModel(T model)位置 e:\Works\Net\LoTBlog\001-Source\LoTCode\LoTBlog\LoT.Dal\BaseDal.cs:行号 26 在 LoT.Service.BaseService`1.AddModel(T ...
libevent echo server example
buffering of data adds a lot of complexity to the first example,but is necessary except for in trivial examples.Example code:&libevent_echosrv-20060829.tar.gz References:My TAILQ example post libevent...
How MaxCompute Supports and Integrates with Open-...
platform coexisted,so there were a lot of debates on the choice between MaxCompute and open-source ecosystems.However,the computing service team has always kept an open mind about open source.Support ...
[翻译]YLGIFImage 高效读取GIF图片
image class and Image viewer ...I referred a lot to this project,especially using CADisplayLink to play the animation. 感谢&OLImageView&！我从这个工程中引用了好多方法，尤其是使用CADisplayLink来显示动画
What is SAP hybris?
MVC applications called accelerators,which help reduce a lot of the graft from a project.There are examples for B2C,B2B,China,Financial Services,Telco and others are emerging too.The gap between these...
如何在ESXI5.1环境中减少虚拟机硬盘容量
wasn’t.After going through a lot of guides,none that worked,I found this method to work:Short version:Shrink disks in windows-Do a V2V-conversion in VMware converter,with reconfig of the disk.Longer ...
谁来接住制造业的数字化和移动化？...
现在移动化的普及已经极大提高的用户信息的及时度，和企业销售环节的效率，云计算的运用也是个很好的方式去做这些事，但是很多企业的核心竞争力并不专注在互联网方面，企业希望雇佣更少的IT运维人员和投入更少的资金...
Redis学习笔记
sets already get a lot done but there is one more data type Redis can handle: Hashes.Hashes are maps between string fields and string values,so they are the perfect data type to represent objects(eg:A...
网页查看form版本时help-about oracle application-...
version,Forms version,DB session id and a lot of other details.However in this particular instance,he said that the Forms version was blank and the session information was also blank.He had even ...
思科借助物联网推进工业解决方案全数字化进程
思科今日宣布推出全新物联网产品，进一步壮大物联网（loT）产品组合中的可扩展工业解决方案阵营。借助这些新技术，思科将进一步巩固其在工业物联网领域的领导地位。增强的思科解决方案支持三大物联网用例：联网机器...
医院如何利用机器学习挽救生命,节省开支
We’veseen a lot of activity—and a lot of capital investment – at the intersectionof big data and health care,but many efforts,including&IBM Watson&and&startup Lumiata,are morediagnostic in nature.A...
leetcode 70 Climbing Stairs
recursion,we will do a lot of same recursion.Example:F(10)=F(9)+F(8);F(9)=F(8)+F(7);we calculate F(8)twice,when n is large,this will increase as a rate of n's exponent.So a more efficient way to solve...
ODPS任务优化之列裁剪
Odps/your_project_20161009231931375gj8pn6sb1_LOT_0_0_0_job0/M1_U13#1045_0", input_bytes":248006624,"input_records":963577,"logId": PU1UQXVNVEF6TGpFd01TNHhPRGdzVDJSd2N5OTBZbDl0WkdOZk1qQXhOakV3TURreU...
hduoj2602Bone Collector
there are a lot of bones,obviously,different bone has different value and different volume,now given the each bone’s value along his trip,can you calculate out the maximum of the total value the bone...
Elasticsearch-SQL
you have lot of shards,40000&consume too much memory.&select,groupBy now support functions and field alias&nested function is also available,eg. split(substring('newtype',0,3),'c')[0]Binary operation ...
word2vec深入浅出，保证你一看就会（1）
a vector with one 1 and a lot of zeroes[0 0 0 0 0 0 0 0 0 0 1 0 0 0 0]比如 motel[0 0 0 0 0 0 0 0 0 0 1 0 0 0 0]AND hotel[0 0 0 0 0 0 0 1 0 0 0 0 0 0 0] 0 可是motel和hotel其实是有很大相关性的，但他们...
AliGenie AR Fuels the Ali New Retail Strategy-...
fantastic effect，which gave the customers deep impressions,and let a lot of people realize that TMall is becoming more and more fashionable and innovative. [Screen_Shot_2017_11_22_at_10_28_18_PM]...
PostgreSQL 10.0 preview 性能提升-radix tree提升...
标签 PostgreSQL,10.0,radix ...generated from the same source files.Patch by Kyotaro Horiguchi,with lot of hacking by me at various stages.Reviewed by Michael Paquier and Daniel Gustafsson.Discussion: ...
ESX4升级5故障处理：LINT1 motherboard interrupt....
states on page 15 to“Disable C1E halt state in the BIOS.”I don’t spend a lot of time changing settings in the BIOS,but with the possible impact of this setting thought this was worth sharing.这个...
动态规划 HDOJ2602-Bone Collector-01背包
there are a lot of bones,obviously,different bone has different value and different volume,now given the each bone’s value along his trip,can you calculate out the maximum of the total value the bone...
引用
So,you either have a row cache object leak(less likely)or just a lot of> objects to keep in row cache(row cache=dictionary cache).>>For example, if you have a lots of tables with lots of columns and ...
Linux Shell的类别
the main attractions of csh was that its syntax looked a lot more like the C language,which many systems programmers are very familiar with.It was also a better interactive shell than the Bourne shell...
杨光：物联网连接将成为虚商发展新空间
其中主要的增长来源来自于LOT和物联网的市场。美国市场尤为醒目，北美市场整个的虚拟运营商用户占比会从现在的25%左右增长到33%左右。物联网是传统形态增长来源之一 物联网在过去一两年十分火热，行业内出现了大量的...
使用UIWebView中html标签显示富文本
option,because we will have a lot of messages and a lot of WebViews.&将UIWebView添加到cell中,但这个备选方案问题多多,因为我有很火很多消息需要显示,同时也需要很多很多的WebView.Add UITextView to tables ...
iOS 代码审查：宽松的指导方针（iOS Code Review:...
application.I had a lot of territory to cover,and not a whole lot of time. So,I decided to do it in two phases:First,I took an initial look at each project to establish a quick(if superficial)opinion ...
Heap size exceeds notification threshold
The meaning is that theprocess is just spending a lot of time in finding free memoryextents during an allocate as the memory may be heavily fragmented.Real memory messages should be ORA-403x when a ...
How InnoDB performs a checkpoint
need to understand a lot of other things that InnoDB does.I hope that explaining how InnoDB does checkpoints in high-level terms,with simplifications,will be helpful.A lot of the simplifications are ...
固若金汤-PostgreSQL pgcrypto加密插件
阿里云正在将这个插件整合到正在公测的ApsaraDB for Greenplum数据库，如果你在RDS PG中使用了这个插件，恭喜你，可以平移到Greenplum了。数据仓库是企业数据的集散地，数据安全不容忽视，特别是云上的用户更是如此...
autowired和@Resource
defined,annotations provide a lot of context in their declaration,leading to shorter and more concise configuration.However,XML excels at wiring up components without touching their source code or ...
Interview with PowerMew-How Cloud Computing,Big ...
Time-consuming and unsafe site visiting experience.It takes a lot of time to travel to foreign countries to view the properties,and it could all be in vein if the actual conditions of the properties ...
hdu 1796 How many integers can you find【容斥原理...
7.Input There are a lot of cases.For each case,the first line contains two integers N and M.The follow line contains the M integers,and all of them are different from each other.0^31,0,and the M ...
(原创)oracle目录及Long类型操作
until we have got the lot dbms_sql.column_value_long(mycursor,1,chunk_size,cur_pos,data_chunk,chunk_size_returned);utl_file.put(file_handle,data_chunk);cur_pos:=cur_pos+chunk_size;exit when chunk_size...
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Grid component has generated a lot of attention in the blogosphere.How many downloads have you logged of that component?How many downloads have there been to-date of YAHOO.ext in total?Jack Slocum：...
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2015年09月11日 16:01&5666 When your purchase a mobile device,you expect the device to be free of digital threats,clear of virues,and otherwise safe to ...Security Team 本文来自合作伙伴“阿里聚安全”.
Why it is good practice to declare loggers private...
annoying if the superclass has a lot of logging that you don't want to see, since you cannot filter it out.Another problem is that your ability to set log levels differently goes away,for example if a...
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the data file Normally this will also find a lot of garbage rows;Don't use this option if you are not totally desperate.-f,-force Overwrite old temporary files.-k,-keys-used=Tell MyISAM to update only...
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inevitable that through these experiences you will learn a lot about yourself. Who you are as a person and what you want out of life might very well change. 2.Freedom You will enjoy a much greater ...
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网络钓鱼邮件通常链接到欺骗性网站，当他们在移动浏览器或狭窄的浏览器窗口中查看时，目标所看到的唯一的事情是URL和欺诈域的前半部分（如Microsoft.com-pl-lot1[.]oficjalne-prezenty-gadzet[.]top.研究人员说，...
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