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  • Choosing a monitoring system for a dynamically scaling environment: Nagios v. Zabbix

    - by wickett
    When operating in the cloud and scaling boxes automatically, there are certain monitoring issues that one experiences. Sometimes we might be monitoring 10 boxes and sometimes 100. The machines will scale up and down based on a demand. Right now, I think the best solution to this is to choose a monitoring solution that will instantiation of targets via calls to an API. But, is this really the best? I like the idea of dynamic discovery, but that is also a problem in the cloud seeing that the targets are not all in the same subnet. What monitoring solutions allow for a scaling environment like this? Zabbix currently has a draft API but I have been unable to fund a similar API for Nagios. Is there a similar API for Nagios? Anyone have any alternate suggestions besides Nagios and Zabbix?

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  • Find methods related to testcases in Java

    - by user3623718
    I want to automatically change some methods in the program. These methods contain some compiler error and my program aims to fix these compiler errors. After fixing compiler errors I need to run test cases related to the changed method (or class) to know it is correct and if not which test cases failed. As the programs under investigation are very big, I only need to run test cases related to changes. As an example, if I change one method, then I need to only run test cases related to this method. Therefore, what I need is to programmatically be able to find test cases related to each method, and class. It is also useful if there is a tool that can do that for me. As an example, a tool which creates a matrix shows each test case is related to which method(s) One easy way to do that is to run all test cases and save functions they accessed. However, the problem is at the beginning the input program contains compiler error and it is not possible to run test cases because of these compiler error. Please let me know what is the best way to do that. An API or a tool that I can be used programmatically is the best for me.

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  • South Florida Code Camp and Other Events

    - by MOSSLover
    My grandmother wanted me to make her a video when she heard I got MVP in SharePoint Server of one of my sessions.  I decided I haven’t visited in two years, so maybe I can do an in person session.  I googled around and found South Florida Code Camp, which will be Saturday, February 12th.  I will be doing a session at 9:50 in the morning on Silverlight just for my grandmother and whoever shows up.  Here is the link for more information: http://www.fladotnet.com/codecamp/. In the upcoming months I plan to return to SharePoint Saturday speaking.  We are also organizing another New York event on Saturday, July 30th.  We will open up submissions for sponsors and speakers somewhere after Best Practices Conference in LaJolla.  I will be speaking at Best Practices LaJolla and the The Expert’s Conference in the upcoming months.  I am really sorry for the lack of updates it’s just been incredibly crazy going back and forth to DC and not having internet on weekdays or having the slowest internet in the world has just not helped.  I am also trying to attend Coders 4 Charity this year, so I can visit some people in St. Louis.  I’ve already got an incredibly crazy schedule going for the year.  I might be helping organize more events.  I’m going to volunteer at New York Code Camp too doing whatever they need this year.  Check back for more updates. Technorati Tags: SharePoint Conferences 2011,Events 2011

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  • Game engine lib and editor

    - by luke
    I would like to know the best way/best practice to handle the following situation. Suppose the project you are working on is split in two sub-projects: game engine lib editor gui. Now, you have a method bool Method( const MethodParams &params ) that will be called during game-level initialization. So it is a method belonging to the game engine lib. Now, the parameters of this method, passed as a reference the structure MethodParams can be decided via the editor, in the level design phase. Suppose the structure is the following: enum Enum1 { E1_VAL1, E1_VAL2, }; enum Enum2 { E2_VAL1, E2_VAL2, E2_VAL3, }; struct MethodParams { float value; Enum1 e1; Enum2 e2; // some other member } The editor should present a dialog that will let the user set the MethodParams struct. A text control for the field value. Furthermore, the editor needs to let the user set the fields e1 and e2 using, for example, two combo boxes (a combo box is a window control that has a list of choices). Obviously, every enum should be mapped to a string, so the user can make an informed selection (i have used E1_VAL1 etc.., but normally the enum would be more meaningful). One could even want to map every enum to a string more informative (E1_VAL1 to "Image union algorithm", E1_VAL2 to "Image intersection algorithm" and so on...). The editor will include all the relevant game egine lib files (.h etc...), but this mapping is not automatic and i am confused on how to handle it in a way that, if in future i add E1_VAL3 and E1_VAL4, the code change will be minimal.

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  • The Oracle Architects Training: 40 training sessions for our EMEA partners to build their Oracle Applications and Technical skills

    - by Richard Lefebvre
    There is a lot more to Oracle technology than meets the eye. Sure, you already belong to a small circle of our most experienced and committed partners. But are you making the best use possible of our technology solutions? Put it to the test. Join the “Oracle Partner Architects Training”. It is aimed at providing your experts, architects and consultants with in-depth architectural knowledge about Oracle technology. Here is your chance to learn from the best. Seasoned speakers, exclusive content and no product marketing. Oracle technology beyond the obvious. Mark your calendar The Oracle Partner Architects Training is an online training program. Sign up for the live Webex sessions (scheduled from January 2013 till April 2013) or watch replays as they become available. Feel free to follow training sessions at your own pace. Also, last year’s sessions are still very accurate and very available on architects.oraevents.eu NOTE: Looking to get your consultants Oracle certified? One more reason to join the Oracle Partner Architects Training. It is the fast track to getting their expertise validated with an Oracle certificate.

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  • How to educate business managers on the complexity of adding new features? [duplicate]

    - by Derrick Miller
    This question already has an answer here: How to educate business managers on the complexity of adding new features? [duplicate] 3 answers We maintain a web application for a client who demands that new features be added at a breakneck pace. We've done our best to keep up with their demands, and as a result the code base has grown exponentially. There are now so many modules, subsystems, controllers, class libraries, unit tests, APIs, etc. that it's starting to take more time to work through all of the complexity each time we add a new feature. We've also had to pull additional people in on the project to take over things like QA and staging, so the lead developers can focus on developing. Unfortunately, the client is becoming angry that the cost for each new feature is going up. They seem to expect that we can add new features ad infinitum and the cost of each feature will remain linear. I have repeatedly tried to explain to them that it doesn't work that way - that the code base expands in a fractal manner as all these features are added. I've explained that the best way to keep the cost down is to be judicious about which new features are really needed. But, they either don't understand, or they think I'm bullshitting them. They just sort of roll their eyes and get angry. They're all completely non-technical, and have no idea what does into writing software. Is there a way that I can explain this using business language, that might help them understand better? Are there any visualizations out there, that illustrate the growth of a code base over time? Any other suggestions on dealing with this client?

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  • Remove Duplicate Messages from Maildir

    - by Joseph Holsten
    I've got a bunch of duplicate messages in my IMAP server's Maildir. What's the best way to remove them? Some relevant points: Shared Message-ID is usually a good enough definition of duplicate. A tiny script that removes all but one of the duplicate messages would work. Sometimes it's necessary to find duplicates based on shared message bodies. What's a reasonable definition of shared here? Bitwise equivalent? What about weird differences in line wrapping, escaping, character encoding? Sometimes there's some meaningful difference between 'duplicate' messages. What's the best way to review the differences in sets of 'duplicate' messages? Diffs?

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  • How can I further improve the quality of my home videos?

    - by Bob
    So now that I have found out how to deinterlace my videos, I am wondering if there is other software out there that can further help improve the quality of my videos. Some other problems I have noticed is when you move the camera side to side very quickly you can notice tearing in the the picture. That is the top half of the frame doesn't line up with the bottom half, it appears that the bottom half is shifted to the right or left depending on which way the camera is moving. Shaky camera hand is also a problem in some videos. I don't expect any software to be able to correct these problems 100%, especially the shaky hand. I know that using a tripod or something of the sorts is the best way to prevent the shakes, but for preexsiting videos what are the best solutions I can use?

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  • How do you pick what server setup you need?

    - by ed209
    I recently started receiving pubsub data feed from etsy. It averages around 250 notifications per minute. But obviously, when the USA wakes up that spikes quite heavily. I want to be able to deal with those spikes (about 3 per day) but the rest of day is fine. What's the best method of getting the right server configuration. My current approach is to keep upgrading until the server stops dying... next leap is: Processor: AMD Phenom II X6-1055T HEXA Core RAM: 4GB DDR2 SDRAM HD1: SATA Drive (7,200 rpm) (+500 GB 7200 RPM SATA hard drive) HD2: SATA Backup Drive (+500 GB SATA (7,200 rpm)) OS: Linux OS (+CentOS 5 64-bit) Bandwidth: 6000GB Monthly Transfer (3000 in + 3000 out) (+100M uplink port) What's the best approach to working out what sort of server setup you need?

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  • How to Edit PDFs?

    - by snowguy
    I typically have two needs: Scenario A. Change a single PDF page. In this case I have a PDF but not the original source file used to create the PDF. I don't want to try to recreate the document from scratch. I'd like to open the PDF and change a few things. A good example of this scenario: I was responsible for planning a big event at a campground site, I had a PDF of the site. I wanted to start with that document, highlight some parts, add some labels, remove some parts that weren't relevant. or Scenario B. Combine PDFs or extract information from a PDF This scenario usually arises because I want a single PDF deliverable that is made up of parts that are best created in different programs. In this case I have the source files for all the documents but they don't play well enough together to easily create a single PDF deliverable. For part of it, I may want to use Libre Office Writer. For another page I may want to use Gimp. Still another page I may use Libre Office Calc. I could use Writer as the master document and embed images or the Calc object into that, but for ultimate control, you can't beat separate PDF documents that are then combined. What are the best tools / processes for editing PDFs in Ubuntu?

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  • Most efficient Implementation a Tree in C++

    - by Topo
    I need to write a tree where each element may have any number of child elements, and because of this each branch of the tree may have any length. The tree is only going to receive elements at first and then it is going to use exclusively for iterating though it's branches in no specific order. The tree will have several million elements and must be fast but also memory efficient. My plan makes a node class to store the elements and the pointers to its children. When the tree is fully constructed, it would be transformed it to an array or something faster and if possible, loaded to the processor's cache. Construction and the search on the tree are two different problems. Can I focus on how to solve each problem on the best way individually? The construction of has to be as fast as possible but it can use memory as it pleases. Then the transformation into a format that give us speed when iterating the tree's branches. This should preferably be an array to avoid going back and forth from RAM to cache in each element of the tree. So the real question is which is the structure to implement a tree to maximize insert speed, how can I transform it to a structure that gives me the best speed and memory?

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  • two thoughts about career excellence

    - by john.rose
    I love Dickens, warts and all. Sometimes he is sententious, and (like the mediocre modern I am) at such points I am willing to listen non-ironically. This bit here struck me hard enough to stop and write it down: I mean a man whose hopes and aims may sometimes lie (as most men's sometimes do, I dare say) above the ordinary level, but to whom the ordinary level will be high enough after all if it should prove to be a way of usefulness and good service leading to no other. All generous spirits are ambitious, I suppose, but the ambition that calmly trusts itself to such a road, instead of spasmodically trying to fly over it, is of the kind I care for. It is Woodcourt's kind. (John Jarndyce to Esther Summerson, Bleak House, ch. 60) Woodcourt is, of course, one of the heroes of the story. It is a heroism that is attractive to me. Here is a similar idea, from the Screwtape Letters. In the satirically inverted logic of that book, the “Enemy” is God, the enemy of the devils but the author of good: The Enemy wants to bring the man to a state of mind in which he could design the best cathedral in the world, and know it to be the best, and rejoice in the, fact, without being any more (or less) or otherwise glad at having done it than he would be if it had been done by another. (C.S. Lewis, Screwtape Letters, ch. 14) Though I will be happy with a good Bazaar, I also dream of Cathedrals. Put whatever name you like on it, as long as I get some part in the fun of building a good one.

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  • Algorithms for Data Redundancy and Failover for distributed storage system?

    - by kennetham
    I'm building a distributed storage system that works with different storage sizes. For instance, my storage devices have sizes of 50GB, 70GB, 150GB, 250GB, 1000GB, 5 storage systems in one system. My application will store any files to the storage system. Question: How can I build a distributed storage with the idea of data redundancy and fail-over to store documents, videos, any type of files at the same time ensuring that should one of any storage devices fail, there would be another copy of these files on another storage device. However, the concern is, 50GB of storage can only store this maximum number of files as compared to 70GB, 150GB etc. With one storage in mind, bringing 5 storage systems like a cloud storage, is there any logical way to distribute or store the files through my application? How do I ensure data redundancy through different storage sizes? Is there any algorithm to collate multiple blob files into a single file archive? What is the best solution for one cloud storage with multiple different storage sizes? I open this topic with the objective of discussing the best way to implement this idea, assuming simplicity, what are the issues of this implementation, performance measurements and discussion of the limitations.

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  • How to setup users for desktop app with SQL Azure as backend?

    - by Manuel
    I'm considering SQL Azure as DB for a new application I'm developing. The reason I want to go with Azure is because I don't want to have to maintain yet another database(s) and I want my users to be able to access the data from anywhere. The problem is that I'm not clear regarding how to users will connect. The application is a basic CRUD type of windows app. I've read that you need to add your IP to SQL Azure's firewall to connect to it, but I don't know if it's only for administration purposes only. Can anyone clarify if anyone (anywhere) can access the data with the proper credentials? Which of the following scenarios would work best (if at all)? A) Add each user to SQL Azure and have the app connect directly to Azure as if it was connecting to SQL Server B) Add an anonymous user SQL Azure and pass the real user's password/hash with every call so the Azure database can service the requests accordingly. C) Put a WCF service in between so that it handles the authentication stuff. The service will only serve the appropriate information to the user given his/her authentication and SQL Azure would be open to the service exclusively. D) - ideas are welcomed - This is confusing because all Azure examples I see are for websites. I have a hard time believing SQL Azure wouldn't handle the case of desktop apps connecting to it. So what's the best practice?

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  • Is sending data to a server via a script tag an outdated paradigm?

    - by KingOfHypocrites
    I inherited some old javascript code for a website tracker that submits data to the server using a script url: var src = "http://domain.zzz/log/method?value1=x&value2=x" var e = document.createElement('script'); e.src = src; I guess the idea was that cross domain requests didn't haven't to be enabled perhaps. Also it was written back in 2005. I'm not sure how well XmlHttpRequests were supported at the time. Anyone could stick this on their website and send data to our server for logging and it ideally would work in most any browser with javascript. The main limitation is all the server can do is send back javascript code and each request has to wait for a response from the server (in the form of a generic acknowledgement javascript method call) to know it was received, then it sends the next. I can't find anyone doing this online or any metrics as to whether this faster or more secure than XmlHttpRequests. I don't know if this is just an old way of doing things or it's still the best way to send data to the server when you are mostly trying to send data one way and you need the best performance possible. So in summary is sending data via a script tag an outdated paradigm? Should I abandon in favor of using XmlHttpRequsts?

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  • Which hard disk drive is which?

    - by djeikyb
    I want to know which hard disk drive corresponds to which device path. It's trivial to match the hard disk stats (brand, size) with the dev path, but I want more. I want to know which drive is which inside my case. What's a good way to go about getting this info? Rules: I am a lazy bum. I don't want to tear apart my server to remove all the drives, then add back one by one. A reboot is acceptable. The drives are inconveniently scrunched together in the case. All label information is hidden. The case can be opened. Most disks are SATA, so theoretically hot swappable. Unplugging cables is fair game. Bonus: For a cli only solution. I'll award answer to the best/easiest gui or cli answer, and give a bounty to the next-best answer of the other kind. Or maybe the other way around, because the bounty is worth more points.

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  • Nginx load distribution and multi-domain SSL

    - by Steve Clark
    I'm researching into the best methods of two new parts of our infrastructure, hopefully finding a single solution for both. 1) We're currently running a single application server, and we're going to be adding an additional application server and load balance between the two. 2) We handle a few thousand domains across the application server(s), and we're looking to support SSL. The best method i've come across so far is using nginx for it's Load Distribution to serve the requests to the application servers, and for it's SSL support. If a request is using SSL, nginx accepts the request on, terminates SSL and pipes to apache (app servers). Now, that's all good, but i'm yet to figure out how we can let nginx handle multiple domains using SSL. We're potentially looking at using UCC SSL Certs, so we can support 150 domains on a single certificate, with each cert on a single IP. I'm all new to this (My experience is just with physical load balancers and a single domains on SSL), so any advice would be very much appreciated.

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  • JavaOne Gangnam Style

    - by Tori Wieldt
    Yes, JavaOne is *the* place for excellent content, including technical information, opportunities to learn best practices from your peers, and access to industry experts. You can find lots of information about content in Java Evangelist Arun Gupta's 25 Reasons to attend JavaOne 2012. But you also have to let your Gangnam Style loose. Here are the Top Ten Fun Reasons to attend JavaOne 2012: 10. Connect with developers from more than 80 countries 9. Kick off the week at GlassFish and Friends Party Sunday night 8. Meet the community of Java Rock Stars 7. Enjoy all San Francisco has to offer 6. Meet your next best friend playing pinball in the Game Zone 5. Have your picture taken with Duke 4. Java in the morning and brews in the afternoon at the Taylor Street Cafe 3. Ride across the Golden Gate Bridge at the Community Geek Bike Ride 2. Rock out at the first-ever Oracle OpenWorld Music Festival and #1... 1. It beats being at work!  If you haven't registered, there's still time. Join us!

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  • The better way to ask for input?

    - by Skippy
    I am wondering which is the best way to go with java code. I need to create a class with simple prompts for input.. I have tried using both classes and cannot work out the particular benefits for each. Is this because I am still in the early stages of programming or are there situations that will occur as it becomes more complex?? import java.util.Scanner; public class myClass { Scanner stdin = new Scanner(System.in); public String getInput(String prompt) { System.out.print(prompt); return stdin.nextLine(); } ... or import java.io.*; public class myClass { public static void main(String[] args) throws IOException { BufferedReader stdin = new BufferedReader (new InputStreamReader (System.in)); System.out.print("Input something: "); String name = stdin.readLine(); I know these examples are showing different methods within these classes, but thought this might serve well for the discussion. I'm really not sure which site is the best to ask this on.

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  • Is full partition encryption the only sure way to make Ubuntu safe from external access?

    - by fred.bear
    (By "external access", I mean eg. via a Live CD, or another OS on the same dual-boot machine) A friend wants to try Ubuntu. He's fed up with Vista grinding to a crawl (the kids? :), so he likes the "potential" security offered by Ubuntu, but because the computer will be multi-booting Ubuntu (primary) and 2 Vistas (one for him, if he ever needs it again, and the other one for the kids to screw up (again). However, he is concerned about any non-Ubuntu access to the Ubuntu partitions (and also to his Vista partition)... I believe TrueCrypt will do the job for his Vista, but I'd like to know what the best encryption system for Ubuntu is... If TrueCrypt works for Ubuntu, it may be the best option for him, as it would be the same look and feel for both. Ubuntu will be installed with 3 partitions; 1) root 2) home 3) swap.. Will Ubuntu's boot loader clash with TrueCrypt's encrypted partition? PS.. Is encryption a suitable solution?

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