BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  wi-fi problem          BorlandTalk.com Forum Index -> Delphi Non-Technical View previous topic :: View next topic   Author Message Marcelo Villegas Guest Posted: Fri Jul 29, 2005 6:57 pm    Post subject: wi-fi problem Hi, I made a program (db based ) that works in a lan enviroment ( client server, firebird backend ), the program works fine, but we made an extension of the lan with 2 access points. I already check the wifi configuration and everything it's working fine ( i made tests sending 5 megs files ), so the problem is the application. (the server is here) lan1 <--->accesspoint1 <----->accesspoint2 (works like bridge)<--->lan2 The application in the lan2 is extremely slow Any advice to accelerate? Thanks Marcelo Back to top Ralf Mimoun Guest Posted: Fri Jul 29, 2005 7:38 pm    Post subject: Re: wi-fi problem Marcelo Villegas wrote: .... Quote: (the server is here) lan1 <--->accesspoint1 <----->accesspoint2 (works like bridge)<--->lan2 The application in the lan2 is extremely slow Any advice to accelerate? The db system seems to be a little chatty. The latency of WLAN connections is very high compared to wired LAN. And if there is much conversation between client and server, you have to wait. Ralf Back to top Brion L. Webster Guest Posted: Fri Jul 29, 2005 8:30 pm    Post subject: Re: wi-fi problem Marcelo Villegas wrote: Quote: I made a program (db based ) that works in a lan enviroment ( client server, firebird backend ), the program works fine, but <snip (the server is here) lan1 <--->accesspoint1 <----->accesspoint2 (works like bridge)<--->lan2 The application in the lan2 is extremely slow In *my* experience, client server is not suited for wireless networks. We had several client server Oracle based applications. They all worked fine over the LAN, whether 16Mbps Token Ring, or 10 or 100 Mbps Ethernet. Once we tried accessing the server over a wireless microwave network (not 802.11, supposedly faster throughput), the Oracle client intermittently lost connection and started causing errors in the application. Introducing a third tier solved the problem - the database talked to the middle tier all on a LAN, and everything else talked TCP/IP to the middle app. The middle app can be as simple as just proxing your datasets for you. Midas/DataSnap (Delphi Enterprise & higher) can do this, or kbmMW ([url]http://www.components4developers.com)[/url], the tool we used was supremely easy, but we did it a while ago, Asta, from http://www.astatech.com . -Brion Back to top Donald Shimoda Guest Posted: Fri Jul 29, 2005 10:05 pm    Post subject: Re: wi-fi problem Brion L. Webster wrote: Quote: Introducing a third tier solved the problem - the database talked to the middle tier all on a LAN, and everything else talked TCP/IP to the middle app. The middle app can be as simple as just proxing your datasets for you. Midas/DataSnap (Delphi Enterprise & higher) can do this, or kbmMW ([url]http://www.components4developers.com)[/url], the tool we used was supremely easy, but we did it a while ago, Asta, from http://www.astatech.com . Dont forget to mention Remobjects www.remobjects.com the most complete and featured IMHO. Donald Back to top Brion L. Webster Guest Posted: Fri Jul 29, 2005 10:35 pm    Post subject: Re: wi-fi problem Donald Shimoda wrote: Quote: Dont forget to mention Remobjects www.remobjects.com the most complete and featured IMHO. I've heard very good things about RemObjects, but I don't have any personal experience with any of their projects (that I remember). I used to remember to mention them, with that caveat. Nowadays they're kind of tarnished in my mental image for reasons that are *totally* nothing to do with the original project, so I tend to forget they're still out there. -Brion Back to top John Kaster (Borland) Guest Posted: Sat Jul 30, 2005 1:03 am    Post subject: Re: wi-fi problem Brion L. Webster wrote: Quote: In my experience, client server is not suited for wireless networks. http://tinyurl.com/7t7bc -- John Kaster http://blogs.borland.com/johnk Features and bugs: http://qc.borland.com Get source: http://cc.borland.com If it's not here, it's not happening: http://ec.borland.com Back to top Bob Swart Guest Posted: Sun Jul 31, 2005 7:22 am    Post subject: Re: wi-fi problem Hi Marcelo, Quote: (the server is here) lan1 <--->accesspoint1 <----->accesspoint2 (works like bridge)<--->lan2 The application in the lan2 is extremely slow Any advice to accelerate? It may be the data-access, trying to "talk" to the server too often. What data-access techniques are you using? Apart from going multi-tier, have you considered / tried a disconnected approach (using dbExpress in Win32 or ADO.NET/BDP in .NET for example?). That might also reduce chatting enough to result in a workable solution... Quote: Marcelo Groetjes, Bob Swart (aka Dr.Bob - www.DrBob42.com) -- Bob Swart Training & Consultancy (eBob42) - Borland Technology Partner Delphi 2005 PDF manuals available from http://www.drbob42.com/training Back to top Angra Mainyu Guest Posted: Sun Jul 31, 2005 10:54 am    Post subject: Re: wi-fi problem "Bob Swart" wrote Quote: Hi Marcelo, The application in the lan2 is extremely slow Any advice to accelerate? It may be the data-access, trying to "talk" to the server too often. What data-access techniques are you using? Apart from going multi-tier, have you considered / tried a disconnected approach (using dbExpress in Win32 or ADO.NET/BDP in .NET for example?). That might also reduce chatting enough to result in a workable solution... Yet another viable solution for Win32 is ADO (aka dbGo) using it's disconnected recordset feature. When doing this type programming my mantra is connect as seldom as possible and disconnect early and often. ADO fully supports connection pooling which is a must to speed up traffic. I would advise anyone wanting to know how best to use ADO get a copy of David Sceppa's book "Programming ADO". For every developer who's uttered, "I wish I knew that before I started writing all this code!" this book is your guide to ADO. Back to top John Kaster (Borland) Guest Posted: Mon Aug 01, 2005 4:16 am    Post subject: Re: wi-fi problem Angra Mainyu wrote: Quote: David Sceppa's book "Programming ADO" David writes good books, from the two I have seen so far. -- John Kaster http://blogs.borland.com/johnk Features and bugs: http://qc.borland.com Get source: http://cc.borland.com If it's not here, it's not happening: http://ec.borland.com Back to top Angra Mainyu Guest Posted: Mon Aug 01, 2005 10:58 am    Post subject: Re: wi-fi problem "John Kaster (Borland)" wrote Quote: Angra Mainyu wrote: David Sceppa's book "Programming ADO" David writes good books, from the two I have seen so far. Yeah, so good that one could almost forgive him for being a Visual Basic kinda guy.<g> Back to top John Kaster (Borland) Guest Posted: Mon Aug 01, 2005 5:17 pm    Post subject: Re: wi-fi problem Angra Mainyu wrote: Quote: one could almost forgive him for being a Visual Basic kinda guy That just makes his books all that more impressive ;) -- John Kaster http://blogs.borland.com/johnk Features and bugs: http://qc.borland.com Get source: http://cc.borland.com If it's not here, it's not happening: http://ec.borland.com Back to top Display posts from previous: All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First         BorlandTalk.com Forum Index -> Delphi Non-Technical All times are GMT Page 1 of 1   Jump to: Select a forum C++ Builder Newsgroups----------------C++ BuilderC++ Builder (ActiveX)C++ Builder (Announcements)C++ Builder (Command Line Tools)C++ Builder DatabasesC++ Builder Databases (ADO)C++ Builder Databases (Desktop)C++ Builder Databases (InterBase Express)C++ Builder Databases (Multi-Tier)C++ Builder Databases (SQL Servers)C++ Builder (Graphics)C++ Builder (IDE)C++ Builder (Internet)C++ Builder (Internet Socket)C++ Builder (Internet Web)C++ Builder (Jobs)C++ Builder (Language)C++ Builder (Language C++)C++ Builder (Compatibility with MFC)C++ Builder (Native API)C++ Builder (Non-Technical)C++ Builder (Students)C++ Builder (Third Party Tools)C++ Builder (Upgrade)C++ Builder (VCL)C++ Builder (VCL Components Usage)C++ Builder (VCL Components Development)C++ Builder (VCL Usage)C++ Builder (WinAPI)C++ Builder Installation Delphi Newsgroups----------------Delphi (General)Delphi ActiveX Controls UsageDelphi ActiveX Controls DevelopmentDelphi As400Delphi DatabasesDelphi Databases (ADO)Delphi Databases (dbExpress)Delphi Databases (Desktop)Delphi Databases (InterBase Express)Delphi Databases (Multi-Tier)Delphi Databases (SQL Servers)Delphi DeploymentDelphi GraphicsDelphi IDEDelphi InternationalizationDelphi InternetDelphi Internet Isapi-WebBrokerDelphi Internet WebSnapDelphi Internet WinsockDelphi JobsDelphi Language BASMDelphi Language ObjectPascalDelphi Model Driven Architecture (General)Delphi Model Driven Architecture (Third Party)Delphi MultimediaDelphi Native APIDelphi Non-TechnicalDelphi ObjectPascalDelphi OLE AutomationDelphi OO designDelphi OpenToolsAPIDelphi Reporting-ChartingDelphi RTLDelphi StudentsDelphi TeamSourceDelphi Thirdparty ToolsDelphi Thirdparty Tools (General)Delphi Thirdparty Tools (IntraWeb)Delphi Thirdparty Tools (RaveReports)Delphi UpgradeDelphi VCLDelphi VCL ComponentsDelphi VCL Components UsingDelphi VCL Components WritingDelphi WebServices SOAPDelphi WinAPIDelphi XMLDelphi Installationcomp.lang.pascal.delphi.components.misccomp.lang.pascal.delphi.components.usagecomp.lang.pascal.delphi.components.writingcomp.lang.pascal.delphi.databasescomp.lang.pascal.delphi.misccomp.sources.delphi JBuilder Newsgroups----------------JBuilderJBuilder AnnouncementsJBuilder Applet IssuesJBuilder As400JBuilder CompilerJBuilder CORBA/RMIJBuilder DatabasesJBuilder DB SwingJBuilder DebuggerJBuilder DeploymentJBuilder DocumentationJBuilder EnterpriseJBuilder HandheldJBuilder IDEJBuilder JavaJBuilder JavaAPIJBuilder Java LanguageJBuilder Java SwingJBuilder Java BeansJBuilder Java Beans UsageJBuilder Java Beans DevelopmentJBuilder JBCLJBuilder JDataStoreJBuilder JobsJBuilder LinuxJBuilder MacintoshJBuilder & MobileSetJBuilder MultiLingual AppsJBuilder Non-TechnicalJBuilder OpenToolsJBuilder Servlets (JSP)JBuilder StudentsJBuilder Team DevelopmentJBuilder Thirdparty ToolsJBuilder UpgradeJBuilder Installation InterBase Newsgroups----------------InterBaseInterBase Bug DiscussionInterBase GeneralInterBase IBConsoleInterBase OpenSourceInterBase ReplicationInterBase SQLInterBase ThirdpartyInterBase Installation Miscellaneous Borland Newsgroups----------------AppCenterAppServerEnteraVisiBroker  You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum Powered by phpBB © 2001, 2006 phpBB Group SEO toolkit © 2004-2006 webmedic.