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  • Friday Tips #4

    - by Chris Kawalek
    It's time once again for our Friday tip. Our question today is about how to determine how much video RAM to allocate for your virtual machines in a VDI deployment: Question: How much video RAM do I really need on my VirtualBox VMs? Answer by John Renko, Consulting Developer, Oracle: The answer is in the VirtualBox admin guide but it's seldom followed correctly, usually resulting in excess unused RAM to be allocated. The formula for determining how much RAM to allocate is shown below for a 32 bit fullscreen 22" monitor supporting 1680x1050: bit depth / 8 x horizontal res x vertical res / 1024 / 1024 = MB RAM Which translates to: 32 bits / 8 x 1680 x 1050 / 1024 / 1024 = 6.7 MB If you wanted to support dual 22" monitors, you would need twice that, so 13.4 MB. Anything in excess of what is needed is readily allocated but not used and would be better suited for running more VMs! Thanks John, that tip should help folks squeeze a little more out of their VDI servers. And remember, if you have a question for us, use hash tag #AskOracleVirtualization on Twitter. We'll see you next week with another tip! -Chris 

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  • How to ...set up new Java environment - largely interfaces...

    - by Chris Kimpton
    Hi, Looks like I need to setup a new Java environment for some interfaces we need to build. Say our system is X and we need to interfaces to systems A, B and C. Then we will be writing interfaces X-A, X-B, X-C. Our system has a bus within it, so the publishing on our side will be to the bus and the interface processes will be taking from the bus and mapping to the destination system. Its for a vendor based system - so most of the core code we can't touch. Currently thinking we will have several processes, one per interface we need to do. The question is how to structure things. Several of the APIs we need to work with are Java based. We could go EJB, but prefer to keep it simple, one process per interface, so that we can restart them individually. Similarly SOA seems overkill, although I am probably mixing my thoughts about implementations of it compared to the concepts behind it... Currently thinking that something Spring based is the way to go. In true, "leverage a new tech if possible"-style, I am thinking maybe we can shoe horn some jruby into this, perhaps to make the APIs more readable, perhaps event-machine-like and to make the interface code more business-friendly, perhaps even storing the mapping code in the DB, as ruby snippets that get mixed in... but thats an aside... So, any comments/thoughts on the Spring approach - anything more up-to-date/relevant these days. EDIT: Looking a JRuby further, I am tempted to write it fully in JRuby... in which case do we need any frameworks at all, perhaps some gems to make things clearer... Thanks in advance, Chris

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  • Friday Spotlight: Network Troubleshooting with Oracle Linux

    - by Chris Kawalek
    Happy Friday, everyone! Our Spotlight this week is on a fantastic new article by Oracle's Robert Chase and posted on Oracle Technology Network. The article steps through, with command line examples, several strategies for tracking down network connectivity issues. From the article: "When applications that use network connectivity for communication are not working, the cause is often a mystery. Despite advances in modern operating systems, many users believe there is no way to directly "see" what's going over the wire, and that often leads to confusion and difficulties when something goes wrong. The reality is that you can actually see what's going over the wire, and there are a number of tools built into Oracle Linux for troubleshooting network issues. This article will help solve some of the mystery and make network connectivity a bit more user friendly." I highly recommend checking this article out, it's a good one! Network Troubleshooting with Oracle Linux  We'll see you next week! -Chris 

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  • Linux Journal Best Virtualization Solution Readers' Choice 2012

    - by Chris Kawalek
    I'm proud to report that in the latest issue of Linux Journal their readers named Oracle VM VirtualBox the "Best Virtualization Solution" for 2012. We're excited to receive this honor and want to thank Linux Journal and their readers for recognizing us!  This is the latest award won by Oracle VM VirtualBox, following a 2011 Bossie Award (best open source software) from InfoWorld, a 2012 Readers' Choice award from Virtualization Review, and several others. These awards help us know that people are using Oracle VM VirtualBox in their day to day work and that it's really useful to them. We truly appreciate their (your!) support. If you already use Oracle VM VirtualBox, you will know all this. But, just in case you haven't tried it yet, here's a few reasons you should download it: Free for personal use and open source. You can download it in minutes and start running multiple operating systems on your Windows PC, Mac, Oracle Solaris system, or Linux PC. It's fast and powerful, and easy to install and use. It has in-depth support for client technologies like USB, virtual CD/DVD, virtual display adapters with various flavors of 2D and 3D acceleration, and much more. If you've ever found yourself in a situation where you were concerned about installing a piece of software because it might be too buggy, or wanted to have a dedicated system to test things on, or wanted to run Windows on a Mac or Oracle Solaris on a PC (or hundreds of other combinations!), or didn't want to install your company's VPN software directly on your home system, then you should definitely give Oracle VM VirtualBox a try. Once you install it, you'll find a myriad of other uses, too. Thanks again to the readers of Linux Journal for selecting Oracle VM VirtualBox as the Best Virtualization Solution for 2012. If you'd like to read the whole article, you can purchase this month's issue over at the Linux Journal website. -Chris

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  • DIA2012

    - by Chris Kawalek
    If you've read this blog before, you probably know that Oracle desktop virtualization is used to demonstrate Oracle Applications at many different trade shows. This week, the Oracle desktop team is at DIA2012 in Philadelphia, PA. The DIA conference is a large event, hosting about 7,000 professionals in the pharmaceutical, bio technology, and medical device fields. Healthcare and associated fields are leveraging desktop virtualization because the model is a natural fit due to their high security requirements. Keeping all the data on the server and not distributing it on laptops or PCs that could be stolen makes a lot of sense when you're talking about patient records and other sensitive information. We're proud to be supporting the Oracle Health Sciences team at DIA2012 by hosting all of the Oracle healthcare related demos on a central server, and providing simple, smart card based access using our Sun Ray Clients. And remember that you're not limited to using just Sun Ray Clients--you can also use the Oracle Virtual Desktop Client and freely move your session from your iPad, your Windows or Linux PC, your Mac, or Sun Ray Clients. It's a truly mobile solution for an industry that requires mobile, secure access in order to remain compliant. Here are some pics from the show: We also have an informative PDF on Oracle desktop virtualization and Oracle healthcare that you can have a look at.  (Many thanks to Adam Workman for the pics!) -Chris  For more information, please go to the Oracle Virtualization web page, or  follow us at :  Twitter   Facebook YouTube Newsletter

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  • Perth's ADF Community Event now an open invite

    - by Chris Muir
    Yesterday saw the next ADF Community Event in Perth, and as promised we grew from 15 to 25 attendees (which is going to cause a bit of a problem soon if we keep growing as we're going to run out of powerpoints for laptops). This bimonthly enjoyed presentations from Matthew Carrigy from the Dept of Finance WA on the ADF UI Shell, a small presentation from me about how Fusion Apps uses ADF, and a hands on based on programatically extending ADF BC to call external web services.  For Matt, his first presentation to a user group, with two live demos, all kudos to him for making it look smooth (for the record I hate live demos, I always break something) - thank you Matt! We've already lined up our speakers for the next event in November, and will be inviting yet more customers to this event.  However the event will now move to an open invite, so if you'd like your staff to attend please let me know by emailing chris DOT muir AT oracle DOT com. Alternatively I've had a fair few requests now for an "Intro to ADF" 1 day session so I'll consider this soon.  Certainly if you're interested let me know as this will help organize the event earlier rather than later. 

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  • Friday Tips #5

    - by Chris Kawalek
    Happy Friday, everyone! Following up on yesterday's post about Oracle VM VirtualBox being selected as the best virtualization solution for 2012 by the readers of Linux Journal, our Friday tip is about that very cool piece of software: Question: How do I move a VM from one machine to another with Oracle VM VirtualBox? Answer by Andy Hall, Product Management Director, Oracle Desktop Virtualization: There are a number of ways to do this, with pros and cons for each. The most reliable approach is to Export and Import virtual machines: From the VirtualBox manager, simply use the File…Export appliance menu and follow the wizard's lead. Move the resulting file(s) to the destination machine; and Import the VM into VirtualBox. This method will take longer and use more disk space than other methods because the configuration files and virtual hard drives are converted into an industry standard format (.ova or .ovf). But an advantage of this approach is that the creator of the virtual appliance can add a license which the importer will see and click-to-accept at import time. This is especially useful for ISVs looking to deliver pre-built, configured and tested appliances to their customers and prospects. Thanks Andy! Remember, if you have a question for us, use Twitter hashtag #AskOracleVirtualization. We'll see you next week! -Chris 

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  • Friday Tips #6, Part 2

    - by Chris Kawalek
    Here is a question about updating Oracle VM: Question: How can I perform Oracle VM 3 server updates from Oracle VM Manager? Answer by Gregory King, Principal Best Practices Consultant, Oracle VM Product Management: Server Update Manager is a built-in feature of the Oracle VM Manager. Basically, Server Update Manager automatically configures YUM updates on all the Oracle VM Servers, pointing each to our Unbreakable Linux Network (ULN) update channel for Oracle VM. The servers periodically check with our Oracle YUM repository and notify the Oracle VM Manager that an update is available for each server. Actual server updates must be triggered by the Oracle VM administrator – they are not executed automatically. At this point, you can use the Oracle VM Manager to put a server into maintenance mode which live migrates all the running Oracle VM Guests to other Oracle VM Servers in the server pool. Once all the Oracle VM Guests have been migrated, the Oracle VM administrator can trigger the update on the server. The entire process is documented in the Installation and Upgrade Guide of Oracle VM Documentation so I won’t spend time detailing the steps. However, configuring the Server Update Manager is exceedingly simple. Simply navigate to the Tools and Resources tab in the Oracle VM Manager, select the link for Server Update Manager and ensure the following values are added to the text boxes as shown in the illustration below: YUM Base URL: http://public-yum.oracle.com/repo/OracleVM/OVM3/latest/x86_64 YUM GPG Key: file:///etc/pki/rpm-gpg/RPM-GPG-KEY-oracle Every server in the pool will be automatically configured for YUM updates once you choose the Apply button. Many thanks to Greg and Rick for providing the answers to this week's questions. If you want to ask us something, hit up Twitter and use hashtag #AskOracleVirtualization. See you next week! -Chris 

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  • Alternative for my preg_replace code

    - by Ben Sinclair
    Here is my code... basically it finds any page-NUMBER- within a variable and then replaces it with a page url from an array $content_text = preg_replace("/page-(\d+)-/sie", '$pageurl[$1]', $content_text); It works a treat until the NUMBER it finds isn't in the array and it returns an error... Is there another efficient way I could do this instead? I liked my code above because it was simple but I may have to use more complex code...

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  • Pointing non-www to a spcific sub-directory

    - by Ben Sinclair
    I might be going about this all wrong so let me know if I am. I am creating software that allows people to sign up and have their own sub-domain on my website. So say my website is ben.com, they could have their own sub-domain called juice.ben.com. When they type their sub-domain juice.ben.com in their address bar, it will load the contents in a root directory. I have also set-up a .htaccess redirect to redirect www.ben.com to ben.com. Not sure if this matters with my question but I thought I'd mention it. Ok, so basically what I think I need to do is put the software they they've signed up to in the root directory. So when someone goes to juice.ben.com, they will be pointed to the root directory (I beleive I cans et-up wild card sub-domains with my host) and the software will then analyse their sub-domain and then display their account. Now, if someone just types in ben.com into their browser, I want it to show the contents of the ben.com/_website/ folder but still show in the address bar that they are still in the root directory. Hopefully I am making sense :) Is this possible with htaccess? If so, what do I need to do?

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  • Creating PDF's using PHP

    - by Ben Sinclair
    What I am wanting to do is create a PDF ideally from HTML code. I found a class called dompdf but I'm having issues with font and page breaks. Does anyone know of another script or even a better way in general to generate PDF files? The reason why I am converting HTML to PDF is because I want someone to use a WYSIWYG editor to create the contents and click save to generate their PDF file... Any input would be greatly apprecaited

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  • How to test PHP in MySQL Strict

    - by Ben Sinclair
    I had a client who had MySQL Strict which brought up a few errors in my MySQL code... I didn't even know there was a MySQL Strict. I've fixed up a lot of the issues but I want to run some further tests on my local server. How do I enable MySQL Strict for testing purposes and then disable it when I no longer want it?

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  • Floating DIV elements is not lining up...

    - by Ben Sinclair
    I have dives that I am floating so that they show side by side. Here is my code: .serviceMembersPosition { width: 190px; float: left; display: inline; border: 1px solid #999; margin: 5px 5px 5px 0; padding: 5px; } It works however if one of the DIV's has more info than the others, it stuffs up the floats. See how there is a gap in my screenshot below. Is there any way to overcome this? I am using JQuery with my website. Maybe there is some code for this?

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  • Time Zones for different users

    - by Ben Sinclair
    I am creating a script that allows the user to choose their own timezone... If I am to make this work, how do I store dates in the database so that every timezone will read it, and show the correct date in their timezone? Do I store the date as GMT and then when a user with the timezone GMT +10 selected views the item within my script, I show that date in GMT +10 time? Is there a better way to do this? Examples would be great :)

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  • Hypervisor load on local disks

    - by Chris
    Hi, What is the I/O load on the local disk system for the host OS in XenServer ? I can't find this info anywhere. As we have a SAN for the VMs themselves, can we get away with cheap controller / SATA disk in raid-1 for the hypervisor ? We won't boot from the SAN as it seems prone to problems. Thanks, Chris

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  • JQuery - Ajax saving sortables in connected lists when sortable item is moved

    - by Ben Sinclair
    I have multiple JQuery sortable lists that connect with each other... They allow you to assign users to certain roles. Basically what I want to do is when a user is dragged from one list to another, I want JQuery to pick up the first list that the user was moved from so that I can send an AJAX request to delete it from that list in my database. I tried the following but every time you move the user over a list and haven't even dropped it within a list, it sends this request which means I'll be sending multiple AJAX requests... Does that make sense? $( ".selector" ).sortable({ out: function(event, ui) { ... } }); From my testing, I can use the following code to just update the list that user has been moved to so I've got the second half covered: $( ".selector" ).sortable({ receive: function(event, ui) { ... } }); Hopefully I am making sense :)

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  • Checking if MySQL Database data does not exist

    - by Ben Sinclair
    I have my songs set-up in my MySQL database. Each song is is either assigned multiple locations or has no locations at all. Only the songs that either have no locations assigned in the database or have the location assigned to the ones specified below should be pulled from the database. Hopefully when you understand my query below it will make sense SELECT s.* FROM roster_songs AS s LEFT JOIN roster_songs_locations AS sl ON sl.song_id = s.id WHERE EXISTS ( SELECT sl2.* FROM roster_songs_locations AS sl2 WHERE s.id != sl2.song_id ) OR ( sl.location_id = '88fb5f94-aaa6-102c-a4fa-1f05bca0eec6' OR sl.location_id = '930555b0-a251-102c-a245-1559817ce81a' ) GROUP BY s.id The query almost works except it pulls out of the database songs that are assigned to sl.location_id's that aren't specified in the above query. I think it has something to do with my EXISTS code picking them up... Any ideas how I can get this to work?

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  • Google Chrome on Mac OS X, full screen option is greyed out, why?

    - by Chris Kimpton
    When I first installed Chrome the menu option for "full screen" was enabled and worked, but for the last few months is been greyed out/disabled. Is it just me or perhaps there is a bug which is why its disabled? I tried deleting the installed version and downloading a new copy, to no avail - but perhaps there is a setting in my local preferences that could be disabling it. Thanks in advance, Chris

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  • vmware windows7 professional changing ip addresses

    - by chris hough
    is there a way to fix your windows 7 professional guest host os ipaddress so it does not change every time you startup? I am currently using NAT for networking and would like to remain using this networking method if possible. In older versions of windows this never used to be a problem in vmware so I am wondering if I am missing a setting in windows 7 professional or in vmware. thank you for your help, chris

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  • Why does Jcreator show iIlegal start of expression?

    - by Inusual Whisper Sinclair
    I am new at programming and currently in our classes we are learning java. I am trying to create a routine in which I need to use String variables only. Below it is the code in which I am working with: public static void main(String[] args) throws java.io.IOException { BufferedReader in = new BufferedReader(new InputStreamReader(System. in )); PrintStream out = System.out; String hair.equals("damagedHair"); cutHair(marvin); cleanHair(michelle); for (int i = 0; i < 2; i++) { static void cutHair(String marvin) { String cabello; marvin.equals(hair); if (marvin.equals("damagedHair")) { cabello.equals("newHaircut"); result(hair); } static void cleanHair(String michelle) { String hair; michelle.equals(hair); if (michelle.equals(newHaircut)) { hair.equals("putShampooAndConditioner"); result(hair); } static void result(String pHair) {; PrintStream out = System.out; out.println("============="); out.println(pHair); out.println("============="); } } Jcreator is giving me an error that says Illegal start of expression and also java 50 error ';' expected. I am not sure why is this coming up and I am a little confused as to whether I am doing something I am not supposed to and how to correct it. Sorry about the double posting, this is the right message. Need some help from you guys to figure this out. Thanks in advanced!

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  • Make content 100% height with scrollbar

    - by Ben Sinclair
    I am using CKEditor (http://ckeditor.com) and I've created my own custom file browser... Problem is, when you open the filebrowser, it opens it in a new popup window and has no scrollbars. I submitted a support ticket 2 weeks ago to find out how to add the scrollbars and no answer. I can't find what to edit in the code either... So what I plan to do is make it scroll using CSS... I found this post about making the body 100% (http://stackoverflow.com/questions/886809/css-quirks-html-4-01-strict-100-body-height-and-scrollbars) but it doesn't add scrollbars. Any ideas how I can force scrollbars using CSS?

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  • Ajaxy

    - by Chris Skardon
    Today is the big day, the day I attempt to use Ajax in the app… I’ve never done this (well, tell a lie, I’ve done it in a ‘tutorial’ site, but that was a while ago now), so it’s going to be interesting.. OK, basics first, let’s start with the @Ajax.ActionLink Right, first stab: @Ajax.ActionLink("Click to get latest", "LatestEntry", new AjaxOptions { UpdateTargetId = "ajaxEntrant", InsertionMode = InsertionMode.Replace, HttpMethod = "GET" }) As far as I’m aware, I’m asking to get the ‘LatestEntry’ from the current controller, and in doing so, I will replace the #ajaxEntrant DOM bit with the result. So. I guess I’d better get the result working… To the controller! public PartialResult LatestEntry() { var entrant =_db.Entrants.OrderByDescending(e => e.Id).Single(); return PartialView("_Entrant", entrant); } Pretty simple, just returns the last entry in a PartialView… but! I have yet to make my partial view, so onto that! @model Webby.Entrant <div class="entrant"> <h4>@Model.Name</h4> </div> Again, super simple, (I’m really just testing at this point)… All the code is now there (as far as I know), so F5 and in… And once again, in the traditionally disappointing way of the norm, it doesn’t work, sure… it opens the right view, but it doesn’t replace the #ajaxEntry DOM element, rather it replaces the whole page… The source code (again, as far as I know) looks ok: <a data-ajax="true" data-ajax-method="GET" data-ajax-mode="replace" data-ajax-update="#ajaxEntrants" href="/Entrants/LatestEntrant">Click to get latest</a> Changing the InsertionMode to any of the other modes has the same effect.. It’s not the DOM name either, changing that has the same effect.. i.e. none. It’s not the partial view either, just making that a <p> has (again) no effect… Ahhhhh --- what a schoolboy error… I had neglected (ahem) to actually put the script bit into the calling page (another save from stackoverflow): <script src="@Url.Content("~/Scripts/jquery.unobtrusive-ajax.js")" type="text/javascript"></script> I’ve now stuck that into the _Layout.cshtml view temporarily to aid the development process… :) Onwards and upwards! Chris

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  • ADF Code Guidelines

    - by Chris Muir
    During Oracle Open World 2012 the ADF Product Management team announced a new OTN website, the ADF Architecture Square.  While OOW represents a great opportunity to let customers know about new and exciting developments, the problem with making announcements during OOW however is customers are bombarded with so many messages that it's easy to miss something important. So in this blog post I'd like to highlight as part of the ADF Architecture Square website, one of the initial core offerings is a new document entitled ADF Code Guidelines. Now the title of this document should hopefully make it obvious what the document contains, but what's the purpose of the document, why did Oracle create it? Personally having worked as an ADF consultant before joining Oracle, one thing I noted amongst ADF customers who had successfully deployed production systems, that they all approached software development in a professional and engineered way, and all of these customers had their own guideline documents on ADF best practices, conventions and recommendations.  These documents designed to be consumed by their own staff to ensure ADF applications were "built right", typically sourced their guidelines from their team's own expert learnings, and the huge amount of ADF technical collateral that is publicly available.  Maybe from manuals and whitepapers, presentations and blog posts, some written by Oracle and some written by independent sources. Now this is all good and well for the teams that have gone through this effort, gathering all the information and putting it into structured documents, kudos to them.  But for new customers who want to break into the ADF space, who have project pressures to deliver ADF solutions without necessarily working on assembling best practices, creating such a document is understandably (regrettably?) a low priority.  So in recognising this hurdle, at Oracle we've devised the ADF Code Guidelines.  This document sets out ADF code guidelines, practices and conventions for applications built using ADF Business Components and ADF Faces Rich Client (release 11g and greater).  The guidelines are summarized from a number of Oracle documents and other 3rd party collateral, with the goal of giving developers and development teams a short circuit on producing their own best practices collateral. The document is not a final production, but a living document that will be extended to cover new information as discovered or as the ADF framework changes. Readers are encouraged to discuss the guidelines on the ADF EMG and provide constructive feedback to me (Chris Muir) via the ADF EMG Issue Tracker. We hope you'll find the ADF Code Guidelines useful and look forward to providing updates in the near future. Image courtesy of paytai / FreeDigitalPhotos.net

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  • DOAG 2012 and Educause 2012

    - by Chris Kawalek
    Oracle understands the value of desktop virtualization and how customers have really embraced it as a top tier method to deliver access to applications and data. Just as supporting operating systems other than Windows in the enterprise desktop space started to become necessary perhaps 5-7 years ago, supporting desktop virtualization with VDI, application virtualization, thin clients, and tablet access is becoming necessary today in 2012. Any application strategy needs to have a secure mobile component, and a solution that gives you a holistic strategy across both mobile and fixed-asset (i.e., desktop PCs) devices is crucial to success. This means it's probably useful to learn about desktop virtualization, even if it's not in your typical area of responsibility. A good way to do that is at one of the many trade shows where we exhibit. Here are two examples:  DOAG 2012 Conference + Exhibition The DOAG Conference is fast approaching, starting November 20th in Nuremberg, Germany. If you've been reading this blog for a while, you might remember that we attended last year as well. This conference is fantastic for us because we get to speak directly to users of Oracle products. In many cases, those DBAs, IT managers, and other infrastructure folks are looking for ways to deal with the burgeoning BYOD model, as well as ways of streamlining their standard desktop and access technologies. We have a couple of sessions where you can learn a great deal about how Oracle can help with these points. Session Schedule (look under "Infrastruktur & Hardware") The two sessions focused on desktop virtualization are: Oracle VDI Best Practice unter Linux (Oracle VDI Best Practice Under Linux) Virtual Desktop Infrastructure Implementierungen und Praxiserfahrungen (Virtual Desktop Infrastructures Implementations and Best Practices) We will also have experts on hand at the booth to answer your questions on using desktop virtualization. If you're at the show, please stop by and say hello to our team there! Educause 2012  Another good example is Educause. We've gone the last few years to show off a slough of education oriented applications and capabilities in the Oracle product portfolio. And every year, we display those applications through Oracle desktop virtualization. This means the demonstration can easily be setup ahead of time and replicated out to however many "demo pods" that we have available. There's no need for our product teams to setup individual laptops for demos -- we can display a standardized Windows desktop virtual machine with their apps all ready to go on a whole bunch of devices like your standard trade show laptop, our Sun Ray Clients, and iPad. Educause 2012 just wrapped, so we're sorry we missed you this year. But there is always next year! Until then, here are a few pictures from this year's show: You can also watch this video to see how Catholic Education Australia uses Oracle Secure Global Desktop to help cope with the ever changing ways that people access their applications.  -Chris 

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