NetScaler Best Practice With VMAC In A High Availability Configuration https://www.citrix.com/blogs/2015/01/05/netscaler-best-practice-with-vmac-in-a-high-availability-configuration/ The NetScaler appliance is an extremely flexible application delive…

SNMP OID Reference - NetScaler 10 https://docs.citrix.com/content/dam/docs/en-us/netscaler/10/downloads/ctx132381.htm System Limits for a NetScaler Appliance 参考 https://support.citrix.com/content/dam/supportWS/kA460000000CcAzCAK/CTX118716.pdf This re…

RAC: Frequently Asked Questions [ID 220970.1]   修改时间 13-JAN-2011     类型 FAQ     状态 PUBLISHED   Applies to: Oracle Server - Enterprise Edition - Version: 9.2.0.1 to 11.2.0.1 - Release: 9.2 to 11.2 Purpose Frequently Asked Questions for Real Applicatio…

Configuration Inserting log requests into the application code requires a fair amount of planning and effort. Observation shows that approximately 4 percent of code is dedicated to logging. Consequently, even moderately sized applications will have t…

rman-08120 We need RMAN to automatically purge archivelogs from the FRA once they are applied to the standby database. 1) From bug 6216036: In 10g, the archive log deletion policy configured using CONFIGURE command applies only to automatic deletion…

CUDA是NVIDIA的GPU开发工具,眼下在大规模并行计算领域有着广泛应用. windows平台上面的CUDA开发之前.最好去NVIDIA官网查看说明,然后下载对应的driver. ToolKits等等. 假设你下载最新版本号的CUDA7.0.里面事实上已经包括了driver及Tool kits. 特别要注意:目标最高版本号为CUDA7.0.仅支持64位系统(32位没法安装CUDA 7.0 Tool Kits).另外,VS编译平台最低要求是VS2010. So,那些依旧用VC6或者VS2008…

SDX Instance Resource Assignment Guide 1 of 2 Memory and vCPU Requirements for NetScaler VPX https://support.citrix.com/article/CTX139485 Article | Configuration | 28 found this helpful | Created: 06 Feb 2014 | Modified: 10 Jul 2018 Applicable Produc…

利用VRID/VMAC实现更安全的netscaler HA故障切换 virtual MAC在故障切换(failover)中的作用.    在一个HA模式中,首要节点(primary node)拥有所有浮动IP,包括MIP(mapped IP).VIP(virtual IP)等等.在网络环境中,首要节点会把这些浮动IP和自身的MAC地址返回给ARP请求,从而使得子网外的设备(例如路由器)的ARP表把该MAC和这些IP匹配起来.    当failover发生的时候,次要节点(secondary no…

Spanning Tree Protocol (STP) in NetScaler Appliance 来源 https://support.citrix.com/article/CTX112341 ------------------------------------------------------------------------------------- Information This contains information about Spanning Tree Protoc…

NetScaler + Wireshark = A Perfect Combination! https://www.citrix.com/blogs/2014/05/03/netscaler-wireshark-a-perfect-combination/ Supercharge your Wireshark! Troubleshooting many of the issues that occur in TCP networks can be rather challenging if y…

NetScaler Active-Active模式 NetScaler Active-Active模式 (此文档基于版本:NS9.3: Build 55.6 nc) By ShingTan Active-Active部署,除了减少downtime,最重要的是可以使所有NetScaler都发挥最大作用.在Active-Active部署模式中,所有的NetScaler设备上配置有相同的VIP与不同的权重值,因此一个特定的VIP在某一时刻只能有效活跃在一台设备上. (注意:Active-Active这…

Citrix NetScaler HA(高可用性)解析 来源 https://www.iyunv.com/thread-172259-1-1.html 1.1     NetScaler高可用概述 我们知道在高可用性环境中,一般需要2台相同型号的设备来完成高可用性环境的构建.高可用性环境的构建,可以确保NetScaler不至于成为系统的单点故障,保证后端的服务能够正常的不间断的提供服务访问.在两台NetScaler设备之间构建高可用(HA)集群时,两台NetScaler设备是通过UDP进行心跳信…

Huge Packet Drops (Tx drops) Observed on NetScaler 来源  https://support.citrix.com/article/CTX215843 Article | NetworkingPerformance | Created: 15 Dec 2014 | Modified: 11 Aug 2016 Applicable Products NetScaler Symptoms or Error Huge packet drops was o…

March 16, 2016 Problem statement:Given a 2D array (matrix) named M, print all items of M in a spiral order, clockwise.For example: M  =  1   2   3   4   5       6   7   8   9  10      11  12  13  14  15      16  17  18  19  20 The clockwise spiral pr…

Atitit 数据存储视图的最佳实际best practice attilax总结 1.1. 视图优点:可读性的提升1 1.2. 结论  本着可读性优先于性能的原则,面向人类编程优先于面向机器编程,应该优先使用视图2 1.3. 视图的缺点:复杂视图有时可能带来性能下降3 1.1. 视图优点:可读性的提升 视图的主要作用有以下几点:视点集中:使用户只关心它感兴趣的某些特定数据和他们所负责的特定任务简化操作:,若视图本身就是一个复杂查询的结果集,这样在每一次执行相同的查询时,不必重新写这些复杂的查询…

0x01 Preface This post is mainly to share the technologies on my practice about the .NET Cross-Platforms. If you had watched my first top post,you will know most of technologies uesd in my practice.Now, I will Introduce the detials about this. Ready…

puts "Let's practice everything." puts 'You\'d need to know \'bout escapes with \\ that do \n newlines and \t tabs.' # the <<END is a "heredoc". See the Student Questions. poem = <<END \tThe lovely world with logic so firml…

ConCurrent in Practice小记 (3) 高级同步技巧 Semaphore Semaphore信号量,据说是Dijkstra大神发明的.内部维护一个许可集(Permits Set),用于发放许可和回收许可,存在内部计数器,主要用来计数能否得到资源(一般用来限制同时访问资源数).当一个线程拿到许可,计数器减一:当线程释放资源则计数器加一:当计数器为0则阻塞线程. 特别地: Semaphore的同步锁机制仅仅用于对访问许可的同步,对于需要访问对象的池等的同步锁并不保证.如一个线程池需…

Java-ConCurrent2.html :first-child{margin-top:0!important}img.plugin{box-shadow:0 1px 3px rgba(0,0,0,.1);border-radius:3px}iframe{border:0}figure{-webkit-margin-before:0;-webkit-margin-after:0;-webkit-margin-start:0;-webkit-margin-end:0}kbd{border:1p…

ConCurrent in Practice小记 (1) 杂记,随书自己写的笔记: 综述问题 1.线程允许在同一个进程中的资源,包括共享内存,内存句柄,文件句柄.但是每个进程有自己的程序计数器,栈和局部变量. 2.安全问题:线程不安全本质上是由于单线程在在从共享内存或者文件中取得自己的资源后,在寄存器处理器缓存等地方对于线程外部是不可见的;因此当变量再次读取或写入到内存或者是文件中后就会产生冲突. 3.活跃性问题:即因为资源占用错误而是的程序无法得到正确的结果,典型如死锁.饥饿.活锁. 4.性能…

摘要: 这是<CMMI快乐之旅>系列文章之一.说起猪皮(GP,Generic Practice),真的让人又爱又恨,中文翻译叫通用实践.CMMI标准中每个级别包含几个PA,每个PA又包含几个Goal,而每个Goal又包含几个Practice.实际上Goal分为两类,一类是Specific Goal(特定目标,简称SG),一类是Geniric Goal(通用目标,简称GG).SG包含的Practic叫做Specific Practic(特定实践,简称SP),GG包含的Practic叫做Genir…

LB 简单比较 – F5.NetScaler.LVS.Nginx.Haproxy 负载均衡技术是构建大型网站必不可少的架构策略之一.它的目的是,把用户的请求分发到多台后端的设备上,用以均衡服务器的负载.我们可以把负载均衡器划分为两大类:硬件负载均衡器和软件负载均衡器. 硬件负载均衡器,常见的有NetScaler.F5.Radware和Array等,这些设备为专业的厂商开发的负载均衡器,价格比较高昂,但也提 供了高 可用性和高稳定性,同时还提供专业的技术服务,这些设备往往都是一些大企业(非IT类)…

源地址:https://msandbu.wordpress.com/2014/10/31/netscaler-and-real-performance-tuning/ 作者显然不是以英语为母语的,所以有些地方我看着也比较费劲,但是十分感谢原作者. =========翻译内容开始========= 昨儿我跟Citrix User Group在挪威一起就Netscaler和性能调整开了个会,45分钟的时间里我也没法说太多关于性能调整的,但是我觉得我还是搞了个大差不离. 下面是会议日程: TCP概述,…

2015年计划透析10本英文原著,最开始选定的第一本英文书是<Who Moved my Cheese>,可是这本书实在是太短.太简单了,总体的意思就是要顺应变化,要跳出自己的舒适区,全文不认识的单词也不多,所以很快读完后就开始找第其它的适合我的英文书. 根据<把你的英语用起来>作者的推荐,从zyea要到了<Daughter of Deceit>的文本,发送到Kindle上阅读试试.这书对于我来说果然还是有难度的,前面一堆人物的出场,让我实在搞不清楚他们之间的关系.看了不…

Writing thread-safe code is managing access to state and in particular to shared, mutable state. Object's state is its data, stored in state variables such as instance or static fields. Whether an object needs to be thread-safe depends on whether it…

shell practice 1 1.require A B C D 1 2 3 4 5 6 7 8 3 5 8 0 1 2 4 3 after handling: T A B C D A 1 2 3 4 B 5 6 7 8 C 3 5 8 0 D 1 2 4 3 1.first need read the first line as an array. then append the element in the proper position for file;   oldifs=$IFS…

粗略看完<Java Concurrency in Practice>这部书,确实是多线程/并发编程的一本好书.里面对各种并发的技术解释得比较透彻,虽然是面向Java的,但很多概念在其他语言的并发编程中,也可以用到.因此,开始写下其读书笔记,归纳总结. 闲话少说,从第十章开始,先上思维导图: 本章的重点,是死锁以及死锁的分析和避免方法. 10.1.1 锁的顺序产生死锁: public class WorkerThread implements Runnable{ private LeftRigh…

This content is part of the series: Java theory and practice A brief history of garbage collection Anatomy of a flawed microbenchmark Are all stateful Web applications broken? Be a good (event) listener Building a better HashMap Characterizing thread…

转自 http://boundary.cc/2013/05/java-app-server-develop/ by JOKER on 2013/05/05 最近状态不是很好,负能量堆到积爆表,静下心来看书写点东西才是出路.给瞎折腾的这两年,做个总结吧. 一些practice和总结 充分单元测试能帮助项目快速推进.看起来单元测试会增加开发时间,但事实上大多数时候它不但会缩短当前功能开发到release的时间,还能为后续的功能的开发做铺垫. 单元测试覆盖率必须保证绝大部分业务逻辑被覆盖.实践起来就是…

Problem Description Tomorrow is contest day, Are you all ready?We have been training for 45 days, and all guys must be tired.But , you are so lucky comparing with many excellent boys who have no chance to attend the Province-Final. Now, your task is…