领域驱动设计 DDD

摘要： 一、什么是高可用(High Availability) 在高可用的解释方面，有人给出了如下的诠释： (1)系统失败或崩溃 (system faults and crashes) (2)应用层或者中间层错误 (application and middleware failures) (3)网络失败 (network failures) (4)介质失败，一般指存放数据的媒体故障 (media failures) (5)人为失误 (Human Error) (6)容灾 (Disasters and extended outages) (7)计划宕机与维护 (Planned downtime, mai 阅读全文

摘要： ORACLE 数据库容灾复制解决方案share Plex SharePlex® 是业界最成熟的高性能/高可用性数据复制解决方案。具有网络占用少、配置灵活、准实时复制等特点，可以解决关键应用的多种可用性问题。推出五年来，该产品 技术已经被世界各地大量的用户成功实施，成为企业应用底层最成熟、最领先的高可用性数据复制解决方案。 通过Redo Log俘获数据变化 用户对数据对象的更新，一旦写入Oracle日志，就可被SharePlex的俘获机制快速捕捉，即使该事务可能尚未执行。SharePlex实现了复制 速度和数据准确性的完美统一。它完全遵从读一致性原则，目标例程是源数据库的精确展现。没有 阅读全文

摘要： Cacti 在英文中的意思是仙人掌的意思，Cacti是一套基于PHP,MySQL,SNMP及RRDTool开发的网络流量监测图形分析工具。它通过 snmpget来获取数据，使用 RRDtool绘画图形，而且你完全可以不需要了解RRDtool复杂的参数。它提供了非常强大的数据和用户管理功能，可以指定每一个用户能查看树状结 构、host以及任何一张图，还可以与LDAP结合进行用户验证，同时也能自己增加模板，功能非常强大完善。 下图是cacti运行的主界面 Cacti 架构图： 阅读全文

摘要： Suppose you want to use http://XXX/aa-bb as your displayed url, but you want to remove the extension from your URL and the actual URL is http://XXX/aa-bb.aspx. You can write some codes by yourself to implement URL Rewriting feature. But there is a problem. The code only works on dev box.when hosted 阅读全文

摘要： This article describes the life cycle of the page from the moment the URL is hit from the web browser till the HTML code is generated and sent to the web browser. Let us start by looking at some keywords that are involved in the life cycle of the page. 阅读全文

摘要： 为 SQL Server 启用 AWE 内存 阅读全文

摘要： PAGEIOLATCH_SH: Occurs when a task is waiting on a latch for a buffer that is in an I/O request. The latch request is in Shared mode. 阅读全文

摘要： CXPACKET: Occurs when trying to synchronize the query processor exchange iterator. You may consider lowering the degree of parallelism if contention on this wait type becomes a problem. 阅读全文

摘要： IntroductionThis topic describes the elements in the Web.config file that support Microsoft ASP.NET AJAX. It also describes how to incorporate those elements into the Web.config file for an existing A... 阅读全文

摘要： If you have installed TFS and have notconfigured your SMTP server, you may do so as follows:On the Team Foundation Server box, navigate to: C:\Program Files\Microsoft Visual Studio 2005 Team Foundatio... 阅读全文

摘要： 日志的逻辑文件名是DBNAME_LOG,数据库DBNAME： USE DBNAME BACKUP LOG DBNAME WITH NO_LOG --截断事务日志 GOOPTION 1:DBCC SHRINKFILE(DBNAME_LOG,10) --收缩事务日志 GO OPTION 2:企业管理器--右键你要压缩的数据库--所有任务--收缩数据库--收缩文件--选择日志文件--在收缩方式里选择收缩... 阅读全文

摘要： A couple of strange warnings in the Security event log always occur when then transaction fails:Log 1:Event Type:Failure AuditEvent Source:SecurityEvent Category:Account Logon Event ID:680Date:2008-2-... 阅读全文

摘要： The following SQL statement is used to reconfigure the SQL SERVER advanced settings, such as max text repl size. sp_configure 'max text repl size', 2147483647GORECONFIGURE;You can also configure this ... 阅读全文

摘要： ChannelFactoryThe following example illustrates how to use the ChannelFactory class to create a channel on the client to send messages with the service endpoint.In order to create and manage channels,... 阅读全文

摘要： WCF configuration file The configuration file in the host application follows the same format as the configuration file in the client application. There is a section where the bindings are defined ... 阅读全文

摘要： 在Windows NT/2000/XP的计算机中，Cookies文件的存放位置为C:\Documents and Settings\用户名\Cookies。硬盘中的Cookies文件可以被Web浏览器读取，它的命令格式为：用户名@网站地址[数字].txt。如一个Cookies文件名为：ch@163[1].txt。要注意的是：硬盘中的Cookies属于文本文件，不是程序。 阅读全文

摘要： How to: Rename a Computer that Hosts a Stand-Alone Instance of SQL Server 2005 1. For a renamed default instance, run the following procedures:Get SQL SERVER NAME: select @@servername sp_dropserver GO... 阅读全文

摘要： Menu bar/Toolbar Missing in Windows Explorer and/or Internet ExplorerThis issue is a little boring. You can figure it out according to the steps in the following article.http://support.microsoft.com/k... 阅读全文

摘要： RGB Color ChartHave a great time creating your HTML pages with great colors!Navigate to the following URL to get more.http://www.tayloredmktg.com/rgb/ 阅读全文

摘要： How to: Make Thread-Safe Calls to Windows Forms Controls URL: ms-help://MS.VSCC.v80/MS.MSDN.v80/MS.VisualStudio.v80.en/dv_fxmclictl/html/138f38b6-1099-4fd5-910c-390b41cbad35.htm Access to Windows Form... 阅读全文

摘要： Transact SQL User-Defined Functions in SQL Server 2005 阅读全文

摘要： Check Page Rank of any web site pages instantlyNavigate to the following URL to check the page rank of any web site:http://www.prchecker.info/check_page_rank.php 阅读全文

摘要： Usually these errors appear in the web farm deployment when the spiders come through the site and they try to request pages with invalid ViewState, etc. Most likely they are trying to reference an old version of the .axd file because they are built dynamically and timestamped for authenticity. 阅读全文

摘要： [Exception] – Could not load file or assembly App_Web_*** ASP.NET 阅读全文

摘要： One tip for javascript to invoke variables in asp.net web page Here’s what I used in an asp.net web page. NO TITLE "> …… This will raise the following error: The Controls collection can... 阅读全文

摘要： THE LONG TAIL Why the Future of Business Is Selling Less of More 阅读全文

摘要： An Introduction to SQL Server Service Broker Author: Roger Wolter Published: February, 2005 Summary: This paper introduces Service Broker, a new feature in Microsoft SQL Server 2005. With Service Brok... 阅读全文

摘要： A linked server is a virtual server that has been defined to SQL Server 2005 with all the information required to access an OLE DB data source. A linked server name is defined by using the sp_addlinkedserver system stored procedure. 阅读全文

摘要： Multipart messages allow for the grouping of multiple parts into a single message. All messages within BizTalk Server are multiple massages, although most of them just have a single part (the message body), and therefore are not created as a multipart message within orchestrations. 阅读全文

摘要： Svcutil.exe can export metadata for services, contracts, and data types in compiled assemblies. The following commands show you how to export metadata and generate the proxy class from a compiled assembly. 阅读全文