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  • How do I diagnose a bottleneck in an Intel Atom based Ubuntu server?

    - by Jon Cage
    I have a small media server at home which has software raid and a gigabit link to the rest of my network. For some reason though, I only get ~10MB/s transfers when copying to/from the server. I use software RAID5 (mdadm) over 4 1TB disks. On top of that I then use LVM to give me a huge pool of disk space which is then split up into multiple partitions which can be resized as and when they need it. I'm guessing this it most likely the cause, but I'd like to know for sure where the root cause is. So, how can I benchmark network throughput (Windows 7 desktop <- Ubuntu server) and hard disk performance to try and identify where my bottleneck might be? [Edit] If anyone's interested, the motherboard is an Intel Desktop Board D945GCLF2. So that's a 300 series Atom processor with the Intel® 945GC Express Chipset [Edit2] I feel like such a fool! I just checked my desktop and I had the slower of the two onboard NICs plugged in so the server is probably not at fault here. Transferring a copy of ubuntu off the server I get ~35-40MB/s according to Windows 7. I'll do those HD tests when I get a chance though (just for completeness).

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  • Why use multiple partitions on a rhel server?

    - by Jakobud
    I'm about to reformat and reinstall CentOS onto an old server. The server runs on a modest 30 node small business network and has a variety of responsibilities including MySQL, a Samba share, DHCPd & SVN/Trac. The old sysadmin had this server setup with almost a dozen different partitions for various things. I'm trying to understand what the advantages of multiple partitions are as opposed to a just one filesystem at /. Speed? Flexibility? Security? It seems like if you misjudge the necessary size for any given partition and it ends up filling up too fast, it requires a sysadmin to go in and expand the partition, etc... Seems like it would be easier if everything was just one flat / filesystem. But I'm sure there are some advantages I'm not aware of. The server is currently running a handful of HDDs raided to ~2TB (raid 0).

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  • Does vmWare ESXi 4.0 U1 support the Promise SuperTrak EX8650 SATA card?

    - by RTNN
    Hi, can anyone tell me if vmWare ESXi 4.0 U1 has support for the Promise SuperTrak EX8650 SATA card? In the hardware support guide I find that VmWare should have support for the Promise SuperTrak EX8650 SATA card but only in version ESX 3.5. Is this card not supported for ESXi 4.0 U1 or what? From the hardware guide! Partner Name Model Manufacturer Device Type Supported Releases Promise SuperTrak EX8650 Promise Technology Inc SAS-RAID ESX 3.5 U5*1 1 , ESX 3.5 U4*1 1 Promise SuperTrak EX8760T Promise Technology Inc SAS ESX / ESXi 4.0 U1*2 2 , ESX / ESXi 4.0*2 2

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  • INCLUDE ON YOUR SOLUTION ORACLE'S BUSINESS INTELLIGENCE SOFTWARE / 22 Fev 11

    - by Claudia Costa
    Convidamo-lo a assistir à sessão ISV Partner Embedded BI que decorrerá no prximo dia 22 de Fevereiro nas instalações da Oracle, em Porto Salvo. Não perca esta oportunidade de descobrir como pode modernizar a sua aplicação através da inclusão do Oracle Business Intelligence (OBI 11g). Durante esta sessão, ficará a saber como tornar os seus relatórios e a informação de apoio à gestão mais competitivos, e em simultâneo como pode proporcionar aos seus clientes informação de gestão com um visual apelativo. Qual a importância que esta temática tem para si? Ao encorporar a solução Oracle BI na sua aplicação, poderá mais rapidamente endereçar oportunidades de mercado, acrescentando valor ao seu produto. Poderá também baixar o custo total de propriedade (TCO) e proporcionar um retorno de investimento maior. Em caso de dúvida ou eventual esclarecimento, por favor contacte Claudia Costa - Telf: 21 4235027 ou email: [email protected]. Contamos com a sua presença! Agenda 09:15 Registo 09:30 Boas Vindas e Introdução - Paulo Costa, ISV Manager Oracle Portugal 09:40 The BI&EPM Market and Oracle's Strategic Position - Mike Hallet, BI and EPM Director Oracle EMEA 10:00 Oracle Business Intelligence 11g - Most Complete, Open, Integrated and Embeddable solution - Guy Ernoul, Master Principal Sales Consultant 11:00 Coffee Break 11:20 Introduction to the embedded BI program for ISV partners - Mike Hallet, BI and EPM Director Oracle EMEA 12:00 Partner showcase of an Oracle Embedded BI solution 13:00 Lunch 14:00 Technical Presentation - Guy Ernoul, Master Principal Sales Consultant OBI Administration: Architecture Creating & Manage the (Presentation, Model, Physical) Layer Administration using FMW control Diagnostic and performance for Enterprise Manager Demonstration OBI Utilization: Analyse & Dashboard Reports Action Framework Map & Scorecard APIs for Embedding OBI 11g (Go, Xml, ADF) Demonstration 16:00 Encerramento22 Fevereiro de 2011 9.30 a.m. - 4.00 p.m. Instalações Oracle Showroom Lagoas Park - Edf 8 Porto SalvoAssista a este evento exclusivo Inscrições Gratuitas. Lugares Limitados!Registe-se já!

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  • C++ Programming: Implementation of the Licensing System For a Software Product

    This article is devoted to the development of the key licensing system for the applications. In the theoretical part of the article, we will examine the cryptography methods, which can be used while implementing the licensing system. Also we will discuss all pros and cons of these methods and select the possible ones for using in the application. In the practical part of the article, we will provide the implementation of the simplest licensing system, which guaranties the protection from cracking even if a hacker knows the source code of an algorithm.

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  • kernel: journal commit I/O error

    - by jasondewitt
    I am having some problems with a Dell 1950 server. I am installing RHEL 4.6 along with Oracle and some other software on here. I am randomly getting an error message saying "kernel: journal commit I/O error" on my ssh session and on the monitor I have hooked up to the server I see an error scrolling by that says "EXT3-fs error (device sda5) in start_transaction: Journal has aborted." It has happened several times but never at the same point during the install. Actually, this last time the system was up and running and I was just trying to import a database into oracle. This has happened on several hard drives, so I'm pretty sure that is not the problem. This makes me think the raid controller is going bad. What do you guys think? ** UPDATE ** Pretty sure it was a bad hard drive. I threw another drive in the server and it's been running for about 48 hours with out problems.

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  • Best Free software for hosting user guides

    - by Hippyjim
    Hi All After having to clean up spam from a MediaWiki install for the umpteenth time, despite a recaptcha plugin "preventing" automated signups, I'm wondering if MediaWiki is the right choice as a CMS for hosting user manuals and guides. I've always loved the way wikis can let the guides be edited and commented on collaboratively, but I'm getting tired of dealing with automated vandals. I've disabled edits & signups for now, but as I'm having to go through the pain of cleaning thousands of junk pages, I'm beginning to think I should cut my losses and look for a better alternative. Does anyone know of suitable a FOSS application (preferably PHP / MySQL based) that would be simple for a non-coder (our manual writer) to edit, but that has all the interconnectivity, and searchability of a wiki? Or should I just bite the bullet again and lock the wiki down even further?

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  • Synaptic: Requires installation of untrusted packages

    - by user170556
    I am completely new to the forums and almost completely new to Linux. I am running Chrubuntu on an Acer C7 and I've been having trouble installing anything in the Ubuntu Software Center. Based on some advice in another thread I tried to install Synaptic, which seems like it does the same thing except it actually works, but I get the same error message with that as I have with every other program I've tried installing. This is all I get under the details: libept1.4.12 librarian0 rarian-compat synaptic Any help with some simple step by step instructions on how to fix this, and will Synaptic basically be able to replace the Software Center? Thanks a lot.

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  • Upgrading NAS hard drives

    - by Mihai Damian
    I was thinking of buying a NAS for home-usage. I've never used a NAS or had HDDs set up in Raids. Before I commit myself to moving all my data to a NAS I need to find out how difficult it is to upgrade and replace the NAS' hard drives. Suppose I set up a Raid 1 NAS with two 1TB hdds. At some point in the future I will use up all the space and will have to install two new 2TB hdds. Now I'll need to migrate the data from the old disks to the new ones. Will I have to hook up one of the old disks in a computer and copy all the data back in the NAS? Or can the migration be done using only the NAS? I realize the answer to the question might depend on the NAS model. Being a simple for-home solution I was thinking of getting something along the lines of D-link's 323.

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  • Simple task framework - building software from reusable pieces

    - by RuslanD
    I'm writing a web service with several APIs, and they will be sharing some of the implementation code. In order not to copy-paste, I would like to ideally implement each API call as a series of tasks, which are executed in a sequence determined by the business logic. One obvious question is whether that's the best strategy for code reuse, or whether I can look at it in a different way. But assuming I want to go with tasks, several issues arise: What's a good task interface to use? How do I pass data computed in one task to another task in the sequence that might need it? In the past, I've worked with task interfaces like: interface Task<T, U> { U execute(T input); } Then I also had sort of a "task context" object which had getters and setters for any kind of data my tasks needed to produce or consume, and it gets passed to all tasks. I'm aware that this suffers from a host of problems. So I wanted to figure out a better way to implement it this time around. My current idea is to have a TaskContext object which is a type-safe heterogeneous container (as described in Effective Java). Each task can ask for an item from this container (task input), or add an item to the container (task output). That way, tasks don't need to know about each other directly, and I don't have to write a class with dozens of methods for each data item. There are, however, several drawbacks: Each item in this TaskContext container should be a complex type that wraps around the actual item data. If task A uses a String for some purpose, and task B uses a String for something entirely different, then just storing a mapping between String.class and some object doesn't work for both tasks. The other reason is that I can't use that kind of container for generic collections directly, so they need to be wrapped in another object. This means that, based on how many tasks I define, I would need to also define a number of classes for the task items that may be consumed or produced, which may lead to code bloat and duplication. For instance, if a task takes some Long value as input and produces another Long value as output, I would have to have two classes that simply wrap around a Long, which IMO can spiral out of control pretty quickly as the codebase evolves. I briefly looked at workflow engine libraries, but they kind of seem like a heavy hammer for this particular nail. How would you go about writing a simple task framework with the following requirements: Tasks should be as self-contained as possible, so they can be composed in different ways to create different workflows. That being said, some tasks may perform expensive computations that are prerequisites for other tasks. We want to have a way of storing the results of intermediate computations done by tasks so that other tasks can use those results for free. The task framework should be light, i.e. growing the code doesn't involve introducing many new types just to plug into the framework.

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  • Advice on Project Management Software?

    - by Zenph
    I was wondering, does anybody work as part of a team, or as a project manager who highly recommends a certain project management solution (self-hosted or otherwise) ? Ideally I want something where I can manage the entire project, and also manage the financial side of things too. Should also add a few other things: notifications for team members for individual projects version control integration (like codebase) real time collaboration like chat

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  • What I do in year to get software oriented job [on hold]

    - by Rohit patil
    I am Rohit patil, studing in 4th year Electronics & telecommunications engineering. I have interest in programming language. I completed c, c++, core java course & get basic knowledge. I have 2 choices to do career in web design or mobile applications, I am confused in which is select. I have one year period for preparing for it. So please give me advice about field is better for me & what I do to get command in that field. Thank you.

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  • Commercial Software Development – presentation slide decks for DDD SouthWest 2.0

    - by Liam Westley
    Thanks to everyone who voted me onto the DDD SouthWest agenda, and a big thanks to all who attended the session and took the time to give feedback to rank me No.3 in the overall conference in presentation skills. There were some good feedback comments, which I'll try to make sure I take note of for future presentations. For those who came to the session, or even for those who were on one of the other tracks, I’ve uploaded the presentation for you to download.  I created a more simple, and smaller, PowerPoint without all the fancy animations and video clips, which is available as a compressed ZIP file,   http://www.tigernews.co.uk/blog-twickers/dddsw/commercialsoftwaredev-dddsw2.zip I also printed the presentation with speaker notes (which contain most of the information I was talking about) using PDFCreator, which is available as an Adobe Acrobat PDF here,   http://www.tigernews.co.uk/blog-twickers/dddsw/commercialsoftwaredev-dddsw2.pdf ... and if PowerPoint presentations don't do it for you, also thanks to Craig Murphy, you can watch a video of the presentation that I gave at DDD8 in Microsoft TVP, Reading,  http://vimeo.com/9216563

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  • How to detect hard disk failure?

    - by Devator
    So, one of my servers has a hard disk failure. It's running software RAID, the system locked up and according to /proc/mdstat (and /var/log/messages), it's really down: Personalities : [raid1] md2 : active raid1 sdb2[1] 104320 blocks [2/1] [_U] md5 : active raid1 sdb5[1] 2104448 blocks [2/1] [_U] md6 : active raid1 sdb6[1] 830134656 blocks [2/1] [_U] md1 : active raid1 sdb1[1] 143363968 blocks [2/1] [_U] and Nov 5 22:04:37 m38501 smartd[4467]: Device: /dev/sda, not capable of SMART self-check However when I do smartctl -H /dev/sda, it passes the test. It also passes the test with smartctl --test=short /dev/sda. So, is smartctl a broken testing tool, or am I doing something completely off?

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  • Adding a single 300Gb SCSI drive to poweredge 2850

    - by John Steele
    I have a 2850 setup with 3 146Gb drives, two partitions 1 12GB system with server 2003 sp2 and 1 261Gb Data. I am strapped on disk space on the data partition having to push data around. I wanted to add a 300Gb single drive for lesser critical data, is this possible? Or is it best to add 2 300Gb drives for another RAID 1 configuration? This is my church network and while it is mission critical it is not enterprise so I can take it down for a few hours. Any pointers to documentation or direct help would be greatly appreciated. John

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  • I can't open Ubuntu Software Center

    - by user165700
    I downloaded google chrome that was made for my computer from https://dl.google.com/linux/direct/google-chrome-stable_current_amd64.deb. For some reason after I installed I can't open. Also in the corner where the time and other things are there's this red circle with a white dash in the middle of it. It says "An error occured, please run package manager from the right click menu or apt-get in a terminal to see what is wrong. The error message was: 'Unknown Error:''(E:The package google-chrome-stable needs to be reinstalled,but I can't find an archive for it.)' This usually means that your installed packages have unmet dependencies.

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  • best storage option for recording live streaming video

    - by Alchemical
    We're creating a new web site that includes video chat capabilities. Wowza Server is being used for the streaming media. We would like the capability for users to record their video chats in certain circumstances. Is it feasible to record the videos to the same server running Wowza? Or performance-wise, would it make more sense to store them on another server? I understand SANs are popular as well, but I'm a little concerned about cost for those as we are on a fairly tight budget. Currently we have two servers with pretty decent RAID cnofigurations for storage, one has 14TB and the other 6TB. Mostly concerned if doing the recording on the same server as the streaming server (or web server), could significantly adversely affect that server's primary function.

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  • I want to sell my software [C# desktop application] but I was Stuck in licencing [closed]

    - by Surendra Soni
    Possible Duplicate: if I use .NET Framework for my application, do I have to pay anything to Microsoft? I have developed a desktop application called "Institute Management System" which has modules like Class manager, Subject manager, Topics manager, Student inquiry manager Student admission manager, Fees manager, Exam manager etc. using C# for the front end and MS Access for the back end. The main problem is that I want to sell it and earn some money but I heard that my application needs to be registered at Microsoft, and I would have to get a license from them for selling, and have to pay them money too. I have spent four months developing it at my own expense, and worked very hard to develop it. So I want some tips, advice, any suggestion for the same. Please also tell me the procedure for all of the required registrations and payment issues. And I also want to ask you if you Can you suggest any other technology where I develop my application and sell it without worrying about licencing and related issues? I am now more confused about that "MS technology is open source or not? "

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