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  • Where in the filesystem should I store shared data?

    - by misterben
    Where in the unix filesystem is the conventional location to save non-user specific data, for example data shared via nfs or ftp, or backups? I could obviously create and use any arbitrary folder (such as /home/shared, /data or /var/data), but I'm really wondering if there are any "best" or "common" practice guidelines. The Filesystem Hierarchy Standard doesn't specify a location for shared data. For backups, I tend to use /var/backups, but as several cronjobs write to it should it really be left for their use?

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  • Why Use GRUB2? Good Question! (part 3)

    <b>Linux Planet:</b> "As we come to the end of Akkana Peck's excellent series on mastering GRUB2, it's not clear what advantages it has over legacy GRUB, or even good old LILO. It seems it's gone backwards. In today's installment we learn how to translate some common and mysterious error messages, and how to manage a multi-boot system with GRUB2."

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  • SEO Secrets an SEO Specialist Won't Want You to Know About

    The market place for self claimed 'SEO secrets' is littered with shoddy SEO specialists and cowboys trying to push the common information available to anyone with a computer, internet connection, and a search engine. Here's the breaking news people - there is no secret email that Google sends out to these SEO specialists, and they don't keep a stack of top secret documents back just for the lucky few. It just doesn't work like that.

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  • How to synchronize the ball in a network pong game?

    - by Thaars
    I’m developing a multiplayer network pong game, my first game ever. The current state is, I’ve running the physic engine with the same configurations on the server and the clients. The own paddle movement is predicted and get just confirmed by the authoritative server. Is a difference detected between them, I correct the position at the client by interpolation. The opponent paddle is also interpolated 200ms to 100ms in the past, because the server is broadcasting snapshots every 100ms to each client. So far it works very well, but now I have to simulate the ball and have a problem to understanding the procedure. I’ve read Valve’s (and many other) articles about fast-paced multiplayer several times and understood their approach. Maybe I can compare my ball with their bullets, but their advantage is, the bullets are not visible. When I have to display the ball, and see my paddle in the present, the opponent in the past and the server is somewhere between it, how can I synchronize the ball over all instances and ensure, that it got ever hit by the paddle even if the paddle is fast moving? Currently my ball’s position is simply set by a server update, so it can happen, that the ball bounces back, even if the paddle is some pixel away (because of a delayed server position). Until now I’ve got no synced clock over all instances. I’m sending a client step index with each update to the server. If the server did his job, he sends the snapshot with the last step index of each client back to the clients. Now I’m looking for the stored position at the returned step index and compare them. Do I need a common clock to sync the ball? EDIT: I've tried to sync a common clock for the server and all clients with a timestamp. But I think it's better to use an own stepping instead of a timestamp (so I don't need to calculate with the ping and so on - and the timestamp will never be exact). The physics are running 60 times per second and now I use this for keeping them synchronized. Is that a good way? When the ball gets calculated by each client, the angle after bouncing can differ because of the different position of the paddles (the opponent is 200ms in the past). When the server is sending his ball position, velocity and angle (because he knows the position of each paddle and is authoritative), the ball could be in a very different position because of the different angles after bouncing (because the clients receive the server data after 100ms). How is it possible to interpolate such a huge difference? I posted this question some days ago at stackoverflow, but got no answer yet. Maybe this is the better place for this question.

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  • Control Parameters and DropDownList Text

    - by Bunch
    This is something that I rarely need to do, grab a DropDownList’s selected item’s text for use in a datasource’s ControlParameter. To allow for this use SelectedItem.Text instead of the more common SelectedValue for the PropertyName. <asp:ControlParameter ControlID="ddlStuff" Name="stuffName" Type="String" PropertyName="SelectedItem.Text" /> The reason for using this is for text comparison. On rare occasions you may need to check the text against a list where the SelectedValue just does not help. Technorati Tags: ASP.Net

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  • SQL Server Management Studio keyboard shortcuts - Part 1

    As responsibilities are growing every day, a DBA or developer needs to improve his/her productivity. One way to do this is to use as many shortcuts as possible instead of using your mouse and the menus. In this tip we take a look at common tasks you may perform when using SSMS and the associated shortcut keys. SQL Backup Pro SQL Backup Pro was the smartest kid at school. Discover why.

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  • Webinar: Temporary Tables in Oracle and SQL Server

    Once again Jonathan Lewis (Oracle Ace Director, OakTable Network) and Grant Fritchey (Microsoft SQL Server MVP) will host a live discussion on Oracle and SQL Server, this time in relation to temporary tables. Will they agree on some common ground? Or will it be an out and out argument? Either way, be prepared for a lively exchange that will not only entertain, but will teach you key concepts on Oracle and SQL Server.

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  • Three Main Differences Between SEO and PPC

    Today, many webmasters that want to boost traffic to their website mistakenly believe that SEO (search engine optimization) and PPC (pay per click) campaigns are the same thing. While both traffic driving methods have a common set of goals, they tend to have very different long term effects. This is just one of many reasons why you need to make use of both tools in order to expand your web presence as much as possible.

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  • Perform Routine Server Checks Using PowerShell

    Database administrators tend to perform a lot of routine checks, referred to as sanity checks, on a daily, weekly, and monthly basis. Rob Gravelle shows you how to write some PowerShell scripts to automate a couple of fairly common sanity checks. New! SQL Monitor 3.0 Red Gate's multi-server performance monitoring and alerting tool gets results from Day One.Simple to install and easy to use – download a free trial today.

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  • TechEd 2014 Day 1

    - by John Paul Cook
    Today at TechEd 2014, many people had questions about the in-memory database features in SQL Server 2014. A common question is how an in-memory database is different from having a database on a SQL Server with an amount of ram far greater than the size of the database. In-memory or memory optimized tables have different data structures and are accessed differently using a latch free and lock free approach that greatly improves performance. This provides part of the performance improvement. The rest...(read more)

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  • Ubuntu 12.10 Broadcom Wireless BCM43225

    - by DanFritz
    During the installation of my Ubuntu 12.10 I could use the wireless connection for extra updates. After the installation I updated Ubuntu and it installed 74 new updates, after that no wireless connection (say what!). So I did try some stuff, I followed the tutorial to load the windows drivers using ndiswrapper (https://help.ubuntu.com/community/WifiDocs/Driver/Ndiswrapper) but I always get that the ndiswrapper module is not loaded (but I did install the extra 3 packages, still doesnt work). ndiswrapper-source ndiswrapper-dkms ndiswrapper-common Please somebody help! Thanks a lot

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  • Can't use ubuntu 12.04 , after pc crashed while updating

    - by ilias
    few days ago while ubuntu 12.04 was doing a common system uodate , my laptop turned off in the middle of process , due to bad ac power. Since then , i can only login but nothing else. A message about compiz appear , but mouse keyboard , icons , unity are not working. the only thing i was able to do is a boot-repear ,as discribed in ubuntu's site, but neither this helped. Hope you can help me. thanks!

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  • Windows Phone 7 Isolated Storage Explorer

    - by help.net
    WP7 Isolated Storage Explorer is a tool designed to help developers and testers interact with the isolated storage file for Silverlight Windows Phone 7 applications. The explorer can work both as a desktop application for testers or integrated in Visual Studio for developers. Whenever a WP7 application/project involves storing data locally the the device, it will be to the isolated storage file. A common difficulty is accessing the data for testing or rapidly restoring the application's data/state...(read more)

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  • Two Important Issues With Contextual Link Building

    When you have your own website, it's important to think about creating a campaign for link building. If you have attempted link building on your own, then you know it's not an easy task and can become worse if the process is not planned out. However, the job can be made much easier if you know the two common issues with contextual link building.

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  • Why would you use data structures (ie Binary Trees, Linked Lists) in your jobs/side projects? [closed]

    - by Chris2021
    It seems to me that, for everyday use, more primitive data structures like arrays get the job done just as well as a binary tree would. My question is how common is to use these structures when writing code for projects at work or projects that you pursue in your free time? I understand the better insertion time/deletion time/sorting time for certain structures but would that really matter that much if you were working with a relatively small amount of data?

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  • Struggling with errors on POS_SUPPLIER_SEARCH_INDEX.sql when applying a Procurement Patch?

    - by LindaJ-Oracle
    Check out this new note (Doc ID 1677737.1)  - How to troubleshoot issues on script POS_SUPPLIER_SEARCH_INDEX.sql which helps you troubleshoot and resolve this common error on patch application: ORA-20000: possearchindex.sql(500): ORA-20000: Exception atPOS_SUPPLIER_SEARCH_INDEX_PKG.create_index(1800): ORA-20000: Exception atPOS_SUPPLIER_SEARCH_INDEX_PKG.create_index(1800): ORA-29855: error occurred inthe execution of ODCIINDEXCREATE routineORA-20000: Oracle Text error:DRG-10502: index POS_SUPPLIER_SEARCH_INDEX does not existDRG-11135: feature not generally available

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  • SEO words: Information Technology vs IT

    - by Jahmic
    IT is in common usage as an abbreviation for "Information Technology" and people may search on it as that, such as "IT Support". However, it is also a "stop word". Any suggestions for optimal SEO usage? Edit: In line with the answers, on reviewing the search engine results, it seems that they are mostly interpreting "IT" correctly. The overall context I'm sure helps, so thus far, I'm going to stay with "IT".

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  • How to draw a spotlight in 3D

    - by RecursiveCall
    To be clear, I am not talking about the light result (the lit area) but the spotlight itself, like this The two common suggestions that I tried are 2D image and a 3D cone. The problem with the pre-regenerated 2D image is that it always look 2D and flat no matter how it is rotated in world space. The cone on the other hand is next to impossible to control when it comes to fade distance, it doesn't look soft (smooth) and it is expensive to compute.

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  • Report Building 3.0: Adding Maps to Your Reports

    With Report Builder and SSMS, there isn't much you can't do in the way of the common reports and visualisations. One of the more interesting visualisations uses maps, and that, combined with layers, makes for an impressive way of representing data. NEW! The easiest way to deploy .NET codeDeploy ASP.NET applications fast, frequently, and without fuss, using Deployment Manager, the new tool from Red Gate. Try it now.

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  • Speaking at PASS (and a plug for two other conferences)

    - by drsql
    So I was notified a few days ago that one of my sessions was selected, and one is an alternate. Luckily, it was the one that I have the most experience with, and the alternate is my latest session that I am really quite happy with after doing it virtually and now at the SQL Saturday in Columbus. The selected session is: Database Design Fundamentals In this session I will give an overview of how to design a database, including the common normal forms and why they should matter to you if you are creating...(read more)

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