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  • Performance-Driven Development

    - by BuckWoody
    I was reading a blog yesterday about the evils of SELECT *. The author pointed out that it's almost always a bad idea to use SELECT * for a query, but in the case of SQL Azure (or any cloud database, for that matter) it's especially bad, since you're paying for each transmission that comes down the line. A very good point indeed. This got me to thinking - shouldn't we treat ALL programming that way? In other words, wouldn't it make sense to pretend that we are paying for every chunk of data - a little less for a bit, a lot more for a BLOB or VARCHAR(MAX), that sort of thing? In effect, we really are paying for that. Which led me to the thought of Performance-Driven Development, or the act of programming with the goal of having the fastest code from the very outset. This isn't an original title, since a quick Bing-search shows me a couple of offerings from Forrester and a professional in Israel who already used that title, but the general idea I'm thinking of is assigning a "cost" to each code round-trip, be it network, storage, trip time and other variables, and then rewarding the developers that come up with the fastest code. I wonder what kind of throughput and round-trip times you could get if your developers were paid on a scale of how fast the application performed... Share this post: email it! | bookmark it! | digg it! | reddit! | kick it! | live it!

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  • Where is the actual content in a TCP segment

    - by packetloss
    When I email something or download a program, or do anything else over a network, where in the segment is the actual content? If I am emailing a 20KB word document, and the maximum data field size in a segment is 1500 bytes, does that mean it takes about 14 segments to mail my document wherever it is going? I get, I think, the OSI model and I have a decent grasp of the IP protocol. I think I understand the concept of header wrapping of each successive layer in the protocol stack. What I can't get a definitive answer to is where does the actual content go in a TCP segment? Is that the datagram? Maybe the fact I am asking proves I have no clue... Many thanks.

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  • Ubuntu: The Movie

    - by CYREX
    Since Ubuntu is the most popular distribution and has made a lot of changes in many places around the globe and in different industries up to the point where even people that do not know what Linux is, they know what Ubuntu is (go figure? ) there might be a movie coming someday (like the social network for Facebook or Revolution OS for Linux/Red Hat) i wanted to know how it all came to be from the actual players in the show. UBUNTU: The Movie Since i have seen several of the primary characters of the movie here, this might be a good place to start on how it all came to be. Not in the traditional wikipedia way or the ubuntu help section, but in the what the actual developers have in mind on how it all went down to the point of having a huge amount of users, an incredible level sophistication in the forum, help sections, installers, etc.. This is just to have the KNOW HOW before the actual movie makes it out some day in the future. As a fan of Ubuntu this is a MOST KNOW! ;) Hope i made some people happy and some other shy hehe.

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  • accessing a web server from the LAN and WAN

    - by jessh
    My router does not support loopback. In order to view a webpage on my server, I either have to type in the local ip (192.168.1.201), or be on another network. What are my options for making this easier? Here are some possible things: Route all web traffic through an external proxy (seems to be overkill) Run my own DNS server (where to start?!) Buy a new router that supports loopback. Surely there is another way that I can use my laptop on the LAN and the WAN by typing in my domain more easily than these solutions.

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  • Stripping a spike from rrdtool when removespike.pl doesn't find any

    - by raccettura
    I know when rrdtool graphs (using rrdtool 1.4) network traffic and the host is restarted a spike is a pretty normal thing to see. In the past I've just run that removespike.pl script that is hosted by the author and it strips the spike and I'm good to go. The last few times I've rebooted removespike.pl finds no spikes, but it's obvious that there are spikes. So my question is, how can I easily remove these spikes and get my graphs usable again? Right now it's so skewed it's meaningless.

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  • How to skip pushing the default gateway via DHCP in OpenWRT?

    - by francadaval
    I have a router with OpenWRT that I want to resolve IP addressing with DHCP without setting a default gateway. I have added a DHCP-Option parameter with value 3,0.0.0.0 that is supposed to set the default gateway by DHCP. Instead, the router IP is defined as default gateway for DHCP connections. How can I set a null default gateway (0.0.0.0) for connections configuration by DHCP? As said in a comment: I want this router to service a VirtualBox network that doesn't set a default gateway via DHCP.

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  • Solaris Administration Web GUI?

    - by Robert C
    I recently installed Solaris 11 x86 text install (http://www.oracle.com/technetwork/server-storage/solaris11/downloads/index.html?ssSourceSiteId=ocomen) to be used as a file server running ZFS. I noticed that I'm given the bare minimum in terms of packages. Is there an official oracle web GUI for managing ZFS? I ran a netstat and it doesn't appear to have installed any webserver thats listening. I saw something from a couple years ago, but apparently it's not packaged or maintained anymore (https://blogs.oracle.com/talley/entry/manage_zfs_from_your_browser). I tried pkg install network-console, but it says that the package isn't available for my platform. Any ideas? I'd like to stick with Oracle Solaris instead of the open source alternatives, if possible.

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  • VPN server to access Samba4

    - by VisionIncision
    On my network I have an Ubuntu 12.04 server running Samba4, my domain is fully configured and functional. Now, I would like to enable VPN access over the internet, and have another box to do so. I have been searching on the internet for guides and information etc, but have not been successful. I have however found this guide http://www.howtogeek.com/51237/setting-up-a-vpn-pptp-server-on-debian/ but was wondering if I could adapt it somehow to enable access to my DC services. EDIT: I would need to authenticate my VPN server with my DC, if that is possible of course. Any insight would be wonderful. Regards, Jack Hunt

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  • Acer Aspire 3680 Wireless Signal Problem

    - by SHiNKiROU
    I am using Acer Aspire 3680. I recently reinstalled Windows Vista, and the wireless did not work by default. I installed the "Atheros Wireless LAN Driver" on this site: http://support.acer-euro.com/drivers/notebook/as_3680.html The result, the wireless APs are successfully scanned. However, when I tried to join a network, even with 5/5 signal, an error message showed up diagnosing signal too little. I restarted as Ubuntu, and wireless worked perfectly, with same computer position. Even more confusing, When I moved to the kitchen (2 meters close to the router), the wireless connected, when I move back to my room, wireless failed on Vista and worked on Ubuntu. It is clearly the driver problem. Acer laptops seems come with pre-installed drivers, but after re-installation, they are all gone. (I can't find the original Acer backup disc) Please do not answer "move closer to the AP" and something related to "interference", as wireless worked with Ubuntu's default driver.

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  • Remotely turn on a device that is powered off?

    - by njboot
    Verbatim from the interview between Brian Williams and Edward Snowden last night: Snowden: Any intelligence service in the world that has significant funding and a real technological research team can own that phone [refering to Williams' iPhone] as soon as it connects to a network; it can be theirs. Williams: Can anyone turn it on remotely if it's off? Snowden: They can absolutely turn it on with the power turned off on the device. I concede Snowden's first point, fine. But the last? Does Snowden's last claim, that a powered off mobile device can be remotely turned, have any merit? It seems highly improbable and seemingly impossible.

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  • Server Core remote management from Windows 7 machine

    - by Robert Koritnik
    I've installed Remote Server Administration Tools for Windows 7 because I would like to administer my Windows Server 2008 R2 Server Core machine. The problem that I'm getting when I try to run Server Manager is: Connecting to remote server failed with the following error message: Access is denied. For more information, see the about_Remote_Troubleshooting Help topic. This is what I've done so far: I'm running WinRM service on both machines (Server and Window 7) I've added my server to trusted hosts on my Windows 7 machine: winrm set winrm/config/client @{TrustedHosts="WINSRV2"} I've added registry entry on Windows 7 machine: reg add HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v LocalAccountTokenFilterPolicy /t REG_DWORD /d 1 /f I've enabled Remote Management inbound rule on server firewall using CoreConfigurator 2.0 both machines are in the same subnet and when I search for network machines on Windows 7 I see my server. Question What else should I do to make it work? I would like to run several different remote management tools against my server machine.

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  • Any way to stop VMWare workstation from dropping SSH connections?

    - by oljones
    I have VMWare workstation 8 with a few Linux guests. I have had problems maintaining an active SSH connection to my VMs when they are in bridged mode. I first read that the onboard realtek network cards were not well supported so I bought a Intel Pro/1000 GT card. This supposedly had support. But this made no difference. Connections via SSH are active for about the first 3 minutes then hang and die. I have changed the TCP Checksum offload on the Intel and Realtek NICs, but this only works some of the time and even then not for very long. The best I could do was about 20 minutes before the connection was dropped. Any ideas?

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  • Oracle Accelerate : Packaged CX Solutions for Growing Companies

    - by Richard Lefebvre
    Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 Oracle Accelerate is Oracle's approach for providing simple to deploy, packaged, enterprise-class software solutions to growing midsize organizations through its network of expert partners. They come with a fixed price, a fixed scope and can be industry- or country-specific. Here is a suggestion of Oracle Accelerate solutions specially tailored for EMEA based customers looking for growing their business with CX technology: Oracle Sales Cloud Birchman Consulting's Oracle Accelerate Solution for Oracle Sales Cloud CSolutor Oracle Accelerate Solution for Oracle Sales Cloud CapricornVentis Oracle Accelerate Solution for Oracle Sales Cloud Oracle Sales Cloud for vertical industries Enigen’s Oracle Accelerate solution for Oracle Fusion CRM for Professional Services BPI's Oracle Accelerate solution for Oracle Sales Cloud for Business Services Companies BPI's Oracle Accelerate Solution for Oracle Sales Cloud for Insurance Companies BPI's Oracle Accelerate solution for Oracle Sales Cloud for Engineering & Construction Companies BPI's Oracle Accelerate Solution for Oracle Sales Cloud for Telecommunications Companies Fellow Consulting's Oracle Accelerate Solution for Oracle Sales Cloud for Consumer Goods industry Fellow Consulting's Oracle Accelerate Solution for Oracle Sales Cloud for Wholesale Distribution Fellow Consulting's Oracle Accelerate Solution for Oracle Sales Cloud for Life Science industry Oracle Service Cloud (RightNow) CapricornVentis Oracle Accelerate Solution for Oracle RightNow Cloud Service for Retail Industry for Ireland CapricornVentis Oracle Accelerate Solution for Oracle RightNow Cloud Service for Retail Industry for the United Kingdom Enigen’s Oracle Accelerate Solution for Oracle RightNow Service Cloud for the United Kingdom DNASTREAM’s RapidLaunch Oracle Accelerate solution for RightNow Oracle Commerce (ATG) ProgiCommerce - an Oracle Accelerate solution for ATG Commerce delivered by PROGIWEB Spindrift Momentum - an Oracle Accelerate Solution for ATG Commerce for Retail Industry e2x RoadRunner - the ATG Oracle Accelerate solution for Manufacturing Industry e2x RoadRunner - the ATG Oracle Accelerate solution for Telecommunications Industry e2x RoadRunner - the ATG Oracle Accelerate solution for Retail Web Commerce

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  • links for 2011-03-04

    - by Bob Rhubart
    Joao Oliveira: Forms and Reports 11g Fusion Startup Script "After Fusion Middleware 11g Linux installation (Weblogic, Forms, Reports, Discoverer and Portal or others) probably most of the newcomers will wonder how to create a startup script to start the Weblogic managed Servers when the server starts up or reboots." (tags: oracle fusionmiddleware weblogic) Anthony Shorten: SOA Suite Integration: Part 3: Loading files Anthony says: "One of the most common scenarios in SOA Integration is the loading of a file into the product from an external source. In Oracle SOA Suite there is a File Adapter that can process many file types into your BPEL process." (tags: oracle otn soa soasuite) Francisco Munoz Alvarez: Playing with Oracle 11gR2, OEL 5.6 and VirtualBox 4.0.2 (1st Part) Oracle ACE Francisco Munoz Alvarez kicks off a tutorial on creating an Oracle Database 11gR2 instance using Oracle VirtualBox and OEL. (tags: oracle database virtualbox virtualization) ORACLENERD: VirtualBox and Shared Folders Oracle ACE Chet Justice shares some tips. (tags: oracle otn oracleace virtualization virtualbox) Chris Muir: Check out the ADF content at this year's ODTUG KScope11 conference Oracle ACE Director Chris Muir shares information on this year's ODTUD Kaleidoscope event in Long Beach, CA, June 26-30. (tags: oracle otn oracleace odtug adf) Edwin Biemond: Setting a virtual IP on a specific Network interface with WebLogic 10.3.4 PS3 Edwin says: "If you want High Availability in WebLogic you need to enable the WebLogic server migration, configure the nodemanager, use a virtual / floating IP in your managed servers and channels." (tags: oracle otn oracleace highavailability weblogic virtualization) Markus Eisele: High Performance JPA with GlassFish and Coherence - Part 3 Markus says: "In this third part of my four part series I'll explain strategy number two of using Coherence with EclipseLink and GlassFish. This is all about using Coherence as Second Level Cache (L2) with EclipseLink." (tags: oracle otn oracleace glassfish coherence) Michel Schildmeijer: Set Oracle ESB montoring with Enterprise Manager Grid Control "Monitoring your Oracle SOA Suite environment...can be very complicated, but if you are using Grid Control, Oracle provides you the SOA Management Pack. Unfortunately this SOA Management Pack has pretty detailed OOTB info about BPEL, but for ESB you won’t find any OOTB metrics." (tags: oracle otn soa grid servicebus)

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  • How to send mass email and not get treated as spam

    - by MonsterMMORPG
    I am the owner of http://www.monstermmorpg.com which is a free to play browser based monster role playing game. I have a very important announcement to send my above 300k members. I already have email sending software but they drop to the spam. So i want to improve my chances of dropping inbox. I am going to give you all details. Alright my domain registrar is : http://www.godaddy.com/ My hosting company is : http://www.leaseweb.com/en This is my setting at leaseweb: This is my DNS settings at Godaddy: This is how I send emails: MailMessage mail = new MailMessage(); mail.To.Add(EmailAdress); mail.From = new MailAddress("MonsterMMORPG NoReplay <[email protected]>"); mail.Subject = "Title Of Mail"; string Body = "Body Of Mail"; mail.Body = Body; mail.IsBodyHtml = true; SmtpClient smtp = new SmtpClient(); smtp.DeliveryMethod = SmtpDeliveryMethod.Network; smtp.UseDefaultCredentials = true; smtp.Host = "85.17.154.139"; smtp.Port = 25; smtp.Send(mail); Thanks for every kind of answer. I did not make any special setting at SMTP:

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  • DSL PPPoE connection not working?

    - by Mussnoon
    I use a wired PPPoE connection to connect to the Internet. What I need to do on Windows to connect to it is put in static IP address, gateway, subnet mask and DNS servers for my LAN card. Next I have to create a dialer for a PPPoE connection, put in my user name, the service name and the password, and "dial" this connection. And it works fine. On Ubuntu 10.04, however, I have tried setting things up in a similar fashion - put in all static addresses for the "automatic" wired connection, then put in user name, service name, password for a "DSL" connection. It worked for a while, then stopped. I have tried putting in all the details within the DSL configuration dialog, same thing happened - it worked for a while, then stopped. I have tried deleting the ethernet connection and only keeping the DSL one with all the numbers put in place, same thing happened - it worked for a while, then stopped. Each of the times, when it connected, it connected randomly, after trying a few times, and either stopped working within a few minutes, or after I had rebooted. I have deleted and remade the connection dozens of times - even with different names, but nothing seems to be working. I have also tried pppoeconf from the terminal, didn't work. I have checked /var/log/kern.log, but nothing changes in the file when I try to connect. I have also checked /sbin/route, but gedit can't even open it (says it can't figure the character encoding...). The "connection established" notification pops up from the top right corner, the same way as when the computer is actually connected to a network. Can anyone figure what's wrong and how it can be solved?

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  • What's Microsoft's strategy on Windows CE development?

    - by Heinzi
    Lots of specialized mobile devices use Windows CE or Windows Mobile. I'm not talking about smart phones here -- I know that Windows Phone 7 is Microsoft's current technology of choice here. I'm talking about barcode readers, embedded devices, industry PDAs with specialized hardware, etc... the kind of devices (Example 1, Example 2) where Windows Phone Silverlight development is not an option (no P/Invoke to access the hardware, etc.). Since direct Compact Framework support has been dropped in Visual Studio 2010, the only option to develop for these device currently is to use outdated development tools (VS 2008), which already start to cause trouble on modern machines (e.g. there's no supported way to make the Windows Mobile Device Emulator's network stack work on Windows 7). Thus, my question is: What are Microsoft's plans regarding these mobile devices? Will they allow native applications on Windows Phone, such that, for example, barcode reader drivers can be developed that can be accessed in Silverlight applications? Will they re-add "native" Compact Framework support to Visual Studio and just haven't found the time yet? Or will they leave this niche market?

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  • VPN to Buffalo WHR-HP-G300N produces a Connection Error 807

    - by Darius
    My friend has modem/router from Clear and I have sent him Buffalo router to put it between his Clear device and the Network. I walked him thru establishing VPN in DD-WRT but when I try to VPN I get a VPN Connection Error 807. I am out of ideas how to solve this. Any suggestion? Clear Modem WAN: xx.xx.xx.xx Clearn Modem NAT's to: 192.168.15.XXX Clear Modem DHCP: 192.168.15.2 - 192.168.15.2 (range is limited to that of ONE ip address) Clear Modem DMZ: 192.168.15.2 the LAN of the clear modem is 192.168.15.XXX The DD-WRT IP: 192.168.4.1 Port FWD: 1723 to 192.168.4.1 PPTP server listens on 192.168.4.1 Where is the problem with this setup?

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  • net share not working as expected ?

    - by Riduidel
    Hi, I'm creating a SMB share on a windows machine using the net share command. I write net share MyCompany_server___0.0.1-SNAPSHOT___server=E:\JavaWorkspace\Product\src\generated\server Then, this share is visible by other Windows machine in network shares of my machine, but not be accessed. Is there an option I forgot to set ? EDITED due to comment Accessing the share using an OpenSUSE machine brings the "The folder contents could not be displayed." message. Accessing the share using the Windows machine sharing that folder succeeds without any issue Accessing the share using another Windows machine displays MyCompany_server_0.0.1-SNAPSHOT_server is not accessible. Access refused

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  • openwrt uses a single interface bridge?

    - by timbo
    My understanding of bridging is that it ties together two interfaces at layer 2. I am looking at a Ubiquiti Nanostation2 running OpenWRT that has an ethernet port 'eth0' and a wifi port 'ath0'. The ethernet port (the 'wan' port) is not part of the bridge and the bridge is just a single interface. Can anyone clarify this? - seems very different to Ubuntu. /etc/config/network: config 'interface' 'loopback' option 'ifname' 'lo' option 'proto' 'static' option 'ipaddr' '127.0.0.1' option 'netmask' '255.0.0.0' config 'interface' 'wan' option 'ifname' 'eth0' option 'proto' 'dhcp' config 'interface' 'wifi' option 'ipaddr' '192.168.13.1' option 'type' 'bridge' option 'proto' 'static' option 'netmask' '255.255.255.0' option 'ifname' 'wifi0'

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  • Configuring WPA2-Enterprise with Freeradius

    - by Vincent O.
    I'm trying to set up an authenticated wifi network with Freeradius. I've managed to get things working using self-signed certs etc. The problem is Windows clients need to uncheck the "Automatically use my windows logon name and password [etc.]" option in the MSCHAPv2 settings. When I connect to my local university with Eduroam, it automatically asks for a username and password instead of sending windows login credentials. How did the sysadmins accomplish this? Is it some kind of RADIUS Attribute that gets sent back?

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  • Netscreen-Remote Equivalent On Linux

    - by mojah
    We're running a simple Juniper VPN tunnel (using Juniper SSG5's) for outside-network access, which works great for Windows PCs since they can connect using the supplied Netscreen-Remote VPN client. Has anyone successfully managed to get this working under Linux? There are several alternatives, but none seem to actually work. The following were tried, but failed: - http://www.prolixium.com/netscreenlinux - http://david.dw-perspective.org.uk/Juniper-Networks-SSL-VPN-Client-On-Linux.html The official version is no Linux Client will ever be developed by Juniper themselves, but perhaps other (open) software exists that has been found compatible to Juniper's VPN?

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  • Why doesn't update-manager allow me to upgrade distribution?

    - by spoulson
    I have an Ubuntu 9.04 PC behind a corporate firewall and proxy server. This requires that in order to get update-manager to fetch and apply updates, I must set the proxy and authentication settings in the Synaptic network configuration. Once done, I can check for updates and things work smoothly (except I don't get popup notifications of new updates, must manually check periodically). However, distribution updates just don't show up in update-manager, such as the newly released 9.10 Karmic Koala. I had the same issue in upgrading 8.10 to 9.04 and solved it by downloading and upgrading from the 9.04 ISO. What do I need to do to upgrade to 9.10 using the standard update-manager UI?

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  • links for 2011-03-02

    - by Bob Rhubart
    Oracle Technology Network Architect Day: Denver Registration is now open. Sessions will cover IT Optimization and consolidation, cloud computing, the evolving role of enterprise IT, and more. (tags: oracle otn entarch event denver) SOA Suite Integration: Part 2: A basic BPEL process (The Shorten Spot) The latest post in Anthony's Shorten's series about SOA Suite integration with Oracle Utilities Application Framework. (tags: oracle otn soa bpel soasuite) ADF: How to create web service based ADF pages The first in promised series of three posts on the topic by Marianne Horsch. (tags: oracle soa webservices adf) David Butler: MDM Poised for Growth (Oracle Master Data Management) David says: "Businesses are talking about the need to fix master data before they can successfully move forward on SOA initiatives. And the growing demands for compliance continue to be a major driver." (tags: oracle otn mdm) Cloud governance is about more than security | The Pervasive Data Center - CNET News Legal and regulatory procedures, transparency, service levels, indemnification, and more are all part of a broader governance landscape that requires IT to work closely with business users. Read this blog post by Gordon Haff on The Pervasive Data Center. (tags: ping.fm) Senthilkumar Rajendran's Blog: Horizontal Scaling OBIEE 11g (tags: ping.fm) InfoQ: Searching Without Objectives Kenneth O. Stanley considers that innovation is stifled when we are strictly following a high goal, and we would progress more when we are inclined to discovery rather than following an objective. (tags: ping.fm) InfoQ: Brownfield Software - Industrial Waste or Business Fertilizer? Josh Graham addresses 10 myths related to working on legacy software, attempting to prove that one can make good use of legacy code without having to rewrite the entire thing. (tags: ping.fm)

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  • Hyper-V core NIC speeds and registry changes

    - by gary
    Good afternoon, On a Dell PE T610 I have Hyper-V core running, with 2 x Broadcom BCM5709C NetXtreme II GigE installed. I have noticed that copying large files 17GB for example, from a network physical server to the Hyper-V host local drive [not vm guest] is very slow in comparison to copying from Physical to Physical servers. Copying a 17GB file physical to Hyper-V host takes 30 minutes Copying a 17GB file physical to physical host takes 15 minutes Can someone tell me exactly what registry nodes I should disable on Hyper-V NICs to improve performance. So far I have gone to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class{4 D36E972-E325-11CE-BFC1-08002BE10318} and set the following to 0 on both physical NICs: *LSOv1IPv4 *LSOv2IPv6 *TCPUDPChecksumOffloadIPv4 *TCPUDPChecksumOffloadIPv6 Should I also disable *TCPConnectionOffloadIPv4 & *TCPConnectionOffloadIPv6? Many thanks in advance

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