DistributedSystems(3rd)英文无水印原版pdf第3版pdf所有页面使用FoxitReader、PDF-XChangeViewer、SumatraPDF和Firefox测试都可以打开本资源转载自网络，如有侵权，请联系上传者或csdn删除查看此书详细信息请在美国亚马逊官网搜索此书Copyright@2017MaartenvanSteenandAndrewS.TanenbaumPublishedbyMaartenvanSteenThisbookwaspreviouslypublishedby:PearsonEducation,IncISBN:978-15-430573-8-6(printedversion)ISBN:978-90-815406-2-9(digitalversion)Edition:3.Version:01(February2017)AllrightstotextandillustrationsarereservedbyMaartenvanSteenandAndrewS.Tanenbaum.Thisworkmaynotbecopied,reproduced,ortranslatedinwholeorpartwithoutwrittenpermissionofthepublisher,exceptforbriefexcerptsinreviewsorscholanyformofinformationstorageadaptationorwhatever,computersoftware,orbysimilarordissimilarmethodsnowknownordevelopedinthefutureisstrictlyforbiddenwithoutwrittenpermissionofthepublisherToMarielle,max,andelkeMVSToSuzanneBarbara,Marvin,Aronnathan,olivia,andmirteASTCONTENTSPreface1Introduction1.1Whatisadistributedsystem?Characteristic1:Collectionofautonomouscomputingelements2Characteristic2:SinglecoherentsystemMiddlewareanddistributedsystems1.2DesigngoalsSupportingresourcesharingMakingdistributiontransparent12Beingscalable15Pitfalls243Typesofdistributedsystems24Highperformancedistributedcomputing25Distributedinformationsystems34Pervasivesystems1.4Summary522Architectures552.1Architecturalstyles56Layeredarchitectures.57Object-basedandservice-orientedarchitectures62Resource-basedarchitectures64Publish-subscribearchitectures2.2MiddlewareorganizationWrappersInterceptors垂番Modifiablemiddleware752.3SystemarchitectureCONTENTSCentralizedorganizations76Decentralizedorganizations:peer-to-peersystemsHybridarchitectures2.4Examplearchitectures94TheNetworkFilesystem94TheWeb982.5Summary3Processes1033.1Threads..104Introductiontothreads104Threadsindistributedsystems1113.2Virtualization116Principleofvirtualizationapplicationofvirtualmachinestodistributedsystems,1223.3Clients124Networkeduserinterfaces124Client-sidesoftwarefordistributiontransparency1273.4Servers128Generaldesignissues129Objectservers133Example:TheApacheWebserver139Serverclusters,,,,,,,1413.5Codemigration152Reasonsformigratingcode152Migrationinheterogeneoussystems1583.6Summary1614Communication4.1Foundations164LayeredProtocols164TypesofCommunication.1724.2Remoteprocedurecall..173Basicrpcoperation174Parameterpassing178RPC-basedapplicationsupport182VariationsonrPc185Example:dCErPc,.1884.3Message-orientedcommunication193Simpletransientmessagingwithsockets.193Advancedtransientmessaging198Message-orientedpersistentcommunication206Example:IBM'sWebSpheremessage-queuingsystem212Example:AdvancedMessageQueuingProtocol(AMQP)....218DS3.01DOWNLOADEDBYTEWIGOMIXMAIL.INFOCONTENTS4.4Multicastcommunication221Application-leveltree-basedmulticasting221Flooding-basedmulticasting225Gossip-baseddatadissemination2294.5Summary2345Naming2375.1Names,identifiersandaddresses2385.2Flatnaming.241Simplesolutions241Home-basedapproaches245Distributedhashtables246Hierarchicalapproaches2515.3Structurednaming256Namespaces.256Nameresolution259Theimplementationofanamespace264Example:TheDomainNameSystem271Example:TheNetworkFileSystem2785.4Attribute-basednaming283Directoryservices283Hierarchicalimplementations:LDAP285Decentralizedimplementations2885.5Summary2946Coordination2976.1Clocksynchronization.298Physicalclocks299Clocksynchronizationalgorithms3026.2Logicalclocks310Lamport'slogicalclocks310Vectorclocks3166.3Mutualexclusion321322acentralizedalgorithm.322adistributedalgorithm323atoken-ringalgorithm.325adecentralizedalgorithm3266.4Electionalgorithms329Thebullyalgorithm.,..330Aringalgorithm332Electionsinwirelessenvironments333Electionsinlarge-scalesystems.3356.5Locationsystems336DOWNLOADEDBYTEWIGOMIXMAIL.INFODS301VIllCONTENTSGPS:GlobalPositioningSystem337WhengPsisnotanoption339Logicalpositioningofnodes3396.6Distributedeventmatching..343Centralizedimplementations3436.7Gossip-basedcoordination349asgregation349Apeer-samplingservice350Gossip-basedoverlayconstruction3526.8Summary3537Consistencyandreplication3557.1Introduction356Reasonsforreplication356Replicationasscalingtechnique3577.2Data-centricconsistencymodels358Continuousconsistency359Consistentorderingofoperations364Eventualconsistency3737.3Client-centricconsistencymodels375MonotonicreadsMonotonicwrites.379Readyourwrite380Writesfollowreads3827.4ReplicamanagementFindingthebestserverlocation383Contentreplicationandplacement..385Contentdistribution..388Managingreplicatedobjects3937.5Consistencyprotocols.396Continuousconsistency..........396Primary-basedprotocols398Replicated-writeprotocolsCache-coherence403Implementingclient-centricconsistency,,...4077.6Example:CachingandreplicationintheWeb4097.7Summar4208Faulttoleran4238.1Introductiontofaulttolerance424Basicconcepts.424Failuodels427Failuremaskingbyredundancy8.2Processresilience432DS3.01DOWNLOADEDBYTEWIGOMIXMAIL.INFO

uniapp接入融云demo，博客中有关于该资源的详细描述https://blog.csdn.net/weixin_42129248/article/details/108491738

淘宝流程讲解1212

明确思想认识，须臾不敢懈怠。
局党组坚持以上率下，带头奋战在地灾防治和防汛救灾工作的第一线，引领局系统全体干部职工在进一步提高政治站位、明确思想认识，树牢“防汛救灾无小事，大家都是局中人”的意识。
针对目前天气形势及江湖水位现状，督促全体干部职工务必落实落细各自职责，不容半点含糊、须臾不敢懈怠。

Java

使用ABCPDF可以把指定网页中的图片文字生成为PDF文件。
7.0.1.1Professnional版下载网址：http://www.3ddown.com/soft/12233.htm标准版序列号(StandardLicense)：341-639-358专业版序列号(ProfessnionalLicense)：719-253-057官方网址：http://www.websupergoo.com把指定网址的全部内容及图片生成为PDF并自动分页代码：123456789101112131415161718192021222324＜%@LANGUAGE="VBS

HSSFWorkbook,XSSFWorkbook所需全部jar,包括poi-3.9-20121203.jar，poi-ooxml-3.9.jar，poi-ooxml-schemas-4.0.0.jar，dom4j-1.6.1.jar，xmlbeans-2.6.0.jar

1.目录1.2.目录.........................................................................................................................................................1JVM...................................................................面试....................................................................................192.1.线程......................................................................................................................................................202.2.JVM内存区域.....................................................................................................................................212.2.1.程序计数器(线程私有)................................................................................................................222.2.2.虚拟机栈(线程私有)....................................................................................................................222.2.3.本地方法区(线程私有)................................................................................................................232.2.4.堆(Heap-线程共享)-运行时数据区......................................................................................232.2.5.方法区/永久代(线程共享).....................................................................................................232.3.JVM运行时内存.................................................................................................................................242.3.1.新生代..........................................................................................................................................242.3.1.1.2.3.1.2.2.3.1.3.2.3.1.4.Eden区....................................................................................................................................................24ServivorFrom...........................................................................................................................................24ServivorTo...........................................

在WinForm开发中，在处理大量数据时不免会有耗时较长的操作，如果将这些操作放在主线程里，软件界面会有较长时间的“无响应”，降低了用户体验，常用的解决方式是加上进度条。
实现思路--------------------------------------------------------------------------------使用BackgroundWorker（已经封装好的线程工具）控件在后台线程执行费时的操作，在主线程中打开一个进度条窗体显示进度。
实现步骤--------------------------------------------------------------------------------第0步：创建一个具有进度条的窗体，以显示进度新建窗体ProcessForm，设置属性FormBorderStyle为None，添加一个ProcessBar控件，如下图所示：进度条窗体PrcessBar的Style属性设置为MarQuee。
在ProcessForm添加如下公共属性：?1234567891011121314151617181920212223//////设置提示信息///publicstringMessageInfo{set{this.labelInfor.Text=value;}}//////设置进度条显示值///publicintProcessValue{set{this.progressBar1.Value=value;}}//////设置进度条样式///publicProgressBarStyleProcessStyle{set{this.progressBar1.Style=value;}}第1步：创建进度条管理类ProcessOperator在该类中添加如下字段：?12privateBackgroundWorker_backgroundWorker;//后台线程privateProcessForm_processForm;//进度条窗体添加如下公共属性、方法和事件：?123456789101112131415161718192021222324252627282930#region公共方法、属性、事件//////后台执行的操作///publicActionBackgroundWork{get;set;}//////设置进度条显示的提示信息///publicstringMessageInfo{set{_processForm.MessageInfo=value;}}//////后台任务执行完毕后事件///publiceventEventHandlerBackgroundWorkerCompleted;//////开始执行///publicvoidStart(){_backgroundWorker.RunWorkerAsync();_processForm.ShowDialog();}#endregion其中，属性BackgroundWork可以指向一个无参数的方法，这里（客户端代码）用来指向要在

CJC10682.4G无线模块，跳频发射部分，SPI接口，瑞萨单片机R5F212L4调试通过

在日常工作中，钉钉打卡成了我生活中不可或缺的一部分。然而，有时候这个看似简单的任务却给我带来了不少烦恼。 每天早晚，我总是得牢记打开钉钉应用，点击"工作台"，再找到"考勤打卡"进行签到。有时候因为工作忙碌，会忘记打卡，导致考勤异常，影响当月的工作评价。而且，由于我使用的是苹果手机，有时候系统更新后，钉钉的某些功能会出现异常，使得打卡变得更加麻烦。 另外，我的家人使用的是安卓手机，他们也经常抱怨钉钉打卡的繁琐。尤其是对于那些不太熟悉手机操作的长辈来说，每次打卡都是一次挑战。他们总是担心自己会操作失误，导致打卡失败。 为了解决这些烦恼，我开始思考是否可以通过编写一个全自动化脚本来实现钉钉打卡。经过一段时间的摸索和学习，我终于成功编写出了一个适用于苹果和安卓系统的钉钉打卡脚本。