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• What are the benefits of NoSQL?

  - by geekbrit

  I'm struggling to see how NoSQL brings any advantages to a system, so I'm interested in hearing from people who have chosen to use it, both the reasons they chose NoSQL, and positive and negative experiences in implementation and use. My first impressions are that NoSQL is a product of the availability of very large, very cheap storage; it seems that a million record database could easily have a 100MByte overhead in field labels embedded in the records. This goes against one of my software design instincts - remove redundancy in code and data whenever practical. However, NoSQL is being used with success in large high-traffic systems, so I must be missing something, looking forward to your responses.

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• Is there a limit on the number of threads that can be spawned simultaneously?

  - by georgesl

  Yesterday I came across this question: How can i call robocopy within a python script to bulk copy multiple folders?, and I though it might be a good exercise for multithreading. I though of spawning as many threads as files needed to be copied, each routine having an exception handling system to prevent the whole copying process from crashing (and log -using mutex on the log file - if there was an error). My question: Is there a limit on the number of thread you can spawn almost simultaneously? If yes, what is the limiting factor? My question is focused on PC desktop, but I welcome any answer on different hardware (embedded systems, calculus clusters, etc.).

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• Oracle Unveils Oracle Java Embedded Suite 7.0

  - by user12612705

  Today Oracle announced the Oracle Java Embedded Suite 7.0. What is the Java Embedded Suite (JES)? It's a middleware stack designed to be run on embedded devices. It's a suite which includes an application server (Glassfish for Embedded Suite), database (Java DB), and web services (Jersey Web Services Framework). Putting these services on the embedded device gives you the ability to provide a set of services at the device point. It also lets you aggregate data at the device point, which you can later sync with your enterprise systems.

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• eSTEP TechCast - June 2014 Material available

  - by uwes

  Dear Partners,We would like to extend our sincere thanks to those of you who attended our TechCast on "Solaris 11.2 Beta -  What's New!".The materials (presentation, replay) from the TechCast are now available for all of you via our eSTEP portal.  You will need to provide your email address and the pin below to access the downloads. Link to the portal is shown below.URL: http://launch.oracle.com/PIN: eSTEP_2011The material can be found under tab eSTEP TechCast.  Feel free to explore also the other delivered TechCasts and more useful information under the Download and Links tab. Any feedback is appreciated to help us improve the service and information we deliver.Thanks and best regards,Partner Systems Enablement EMEA

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• "Failed to mount Windows share" error in Samba

  - by Ranjith R

  This is the situation. There are 3 machines in the office. The Operating systems on them are respectively, Linux mint Ubuntu 12.04 Windows Vista The Ubuntu (#2) machine is supposed to be the common file server between the machines #1 and #3. Machine #2 has two hard disks. One is a 500 GB NTFS empty drive and the other is a 160 GB ext4 drive. My plan is to make the 500 GB as the file sharing disk. When I share a folder like ~/Documents using Nautilus context menu on machine #2, I can access the files easily on both #1 and #3, but when I try to share some folder on 500 GB disk, I get an error on machine #1 that says Failed to mount windows share I do not mind formatting the drive to ext4 if needed, but I am sure that something simple is wrong. EDIT I took @Marty's comment as a hint and used ntfs-config to configure automount of that partition. It is working now. Thanks

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• Does your team develop their supporting tools or this should be outsourced out of it?

  - by Pierre 303

  By supporting tools, I mean: reference data manager, like virus definition for anti-virus software test data generator level builders for games simulators or advanced mocking systems Does the team building the core product (in the case above, the game or the anti-virus) should be part of the development of the supporting tools significantly, or this is a task you would outsourced out of the team to help it focus on the product? I don't have enough experience to evaluate the pros & cons of each, so I'm hopping you would come up with personal experiences to share, or even studies or papers you read on the subject.

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• June 2013 Virtualization Newsletter is Here!

  - by Chris Kawalek

  The June Edition of the Oracle Virtualization Newsletter is now available! In this issue, you'll learn about: Announcing Oracle Secure Global Desktop 5.0 Dell Announces New Infrastructure Offering with Oracle Linux, Oracle VM, and Oracle Enterprise Manager, Optimized to Run on Dell x86 Systems Oracle VM Continues to Expand Partner Ecosystem with Cisco and NetApp  Get Ready for Oracle OpenWorld 2013 And much more! Head on over and read the newsletter. You can also subscribe and have it automatically appear in your inbox each time a new edition is released! -Chris 

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• How can I get Gnome3 to remember my session?

  - by user60381

  I am running Gnome3, but I had the same problem with Unity, on Ubuntu 12.04. I have a fairly elaborate setup I enjoy using day-to-day. A LibreOffice spreadsheet with everyone's extension numbers; a window with reference data I use regularly; two mulit-tabbed Konsole/Terminal windows with several remote systems sessions, firefox with a set of open tabs, and so on. But whenever I log out, when I return, I must set up everything from scratch. I remember the good 'ol days, when I rebooted, I'd re-log in, and all my windows came back up in the same places as they were when I logged out, and my Konsole/Term would come up with the same remote logins as before.... I'd have to re -setup some of my programs, but that's better than having to move every win into place, and resize them, etc. How do I get this functionality back?

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• Playing a sound on collision?

  - by Eric McLoughlin

  I'm making a pool game. I've separated the gameplay logic and the physics into two systems, entities and physics. Each entity holds a reference to a body which the physics system uses. The body itself holds a reference back to it's owner. When an entity collides with another entity, the Collided(Entity other) method is called on both. What I'm trying to do now is to play a sound when both entities colliding are of a certain subclass. I'm not sure how to do that. I could do it in the Collided method, but then the sound would be played two times at the same time, since the method was called on both entities. How do you suggest I do this?

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• Computer science [closed]

  - by user73589

  I'm a computer science graduate Information systems department. I graduated this year with GPA 3.8 but I'm totally lost, we didn't work on making applications and writing a lot of codes at college. I feel that if I applied in any job I won't be taken because I don't have any knowledge. I'm a very hardworker but I don't know from where to start and what to do. Should I go for web design and that staff or for Android and mobile applications? What can I do and how to start?

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• Can manager classes be a sign of bad architecture?

  - by Paul

  Lately I've begun to think that having lots of manager classes in your design is a bad thing. The idea hasn't matured enough for me to make a compelling argument, but here's a few general points: I found it's a lot harder for me to understand systems that rely heavily on "managers". This is because, in addition to the actual program components, you also have to understand how and why the manager is used. Managers, a lot of the time, seem to be used to alleviate a problem with the design, like when the programmer couldn't find a way to make the program Just WorkTM and had to rely on manager classes to make everything operate correctly. Of course, mangers can be good. An obvious example is an EventManager, one of my all time favorite constructs. :P My point is that managers seem to be overused a lot of the time, and for no good reason other than mask a problem with the program architecture. Are manager classes really a sign of bad architecture?

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• Ubuntu will not start any more !!!!!!!! PLEASE HELP?

  - by mike

  I really need help , I left my computer downloading all the night and i did donwload 35 go of movies ( legal ....) , I restart the computed in the morning then i booted in my encrypted windows partition for my work. Surprise in the evening when i try to boot on linux again , then it doesnt start as it's telling me low graphic mode , and doesnt boot( happen when it's really full ) . Tryed in rescue and it's telling me i have 0 mo free. Tryed in shell comand sdo root rm - Some files IMPOSSIBLE . it's telling me that my files are only in read only file systems. I mouted my other hard drive in windows as well but there is a '' Write protection '' i can only read the files. Please let me know , what solution do i have ? Should i try live usb with ubuntu ? Thanks guys

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• Storing E-mail addresses more efficiently in SQL Server

  A lot of people are storing large quantities of e-mail addresses in their systems. Since a large percentage of any system's user base is going to be supplying e-mail addresses from a few of the vastly popular providers (such as GMail and Hotmail), we are storing the "@gmail.com" and "@hotmail.com" parts of those addresses on disk over and over and over again. Get smart with SQL Backup ProPowerful centralised management, encryption and more.SQL Backup Pro was the smartest kid at school. Discover why.

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• Theme sometimes fails to load on some UI elements

  - by Neil

  I have no idea if this error as been seen before or not, I have looked around and found people saying they have errors that sound the same but none of the fixes work, my issue is that sometimes the theme does not load some parts of the UI, (the buttons and icons in this case) but the rest is just fine (window bars e.t.c) so I have no idea what the issue is, it works just fine for the most part but sometimes has this bug, if you restart the system it tends to fix it for some time so its hard to see how it could be a graphic card error, however I am very new to linux systems so I may be missing someting very fundamental here. Thank-you in advance. This image shows my problem

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• Managing a manager who expects too much

  - by dotnetdev

  I am in 3rd line support. We do a lot of bug fixing (although we should be doing other stuff). Quite often, we get systems which are so badly designed and configured (at the server OS level and software level) that they are beyond repair. Yet my manager, even though he was a dev, may swear when I tell him the system is unrepairable (As the person who does our server work gives an opinion that it's FUBAR). However, he still expects it to work without a rebuild. How can I make it work like that when a guy with a million years more experience says the system needs a rebuild?

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• Now's the Time to Register for Oracle OpenWorld Latin America 2012!

  - by Oracle OpenWorld Blog Team

  The recent Oracle OpenWorld conference held in San Francisco was a huge success. If you weren't able to attend, you'll be glad to know that key content and speakers from that conference will be featured in São Paulo on 4-6 December at Oracle OpenWorld Latin America 2012. Session tracks this year include: Applications, Business Intelligence, Database, Industries, Middleware, Oracle Services, and Servers and Storage Systems. At Oracle OpenWorld there's so much to see and do: keynotes, technical sessions, Oracle and partner demonstrations, hands-on labs, networking events, and more. Check the Website often as more details get added. And if you register between now and 15 November, you can save 35% off of the onsite price. We look forward to seeing you there!  (photo montage by Arun Gupta)

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• why does our network printer not show up on some of our macs, but does show up on others? [on hold]

  - by peter

  We lost power in our building and now cannot get our HP laser jet 5200 to be recognized by half of our computers. We are all Macs, some running OS 10.7.5 can see the printer, others running 10.7.5 cannot, and those running 10.8.5 and 10.9 cannot. We've re-booted the router, turned off and on printer and macs—no go. The printer displays an IP address (dynamically assigned) but we can't access it. Tried to see it using CUPS—same story, can see it on some systems, not on others. Any thoughts?

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• Kubuntu 11.10 disable tapclick not working from gui

  - by Star

  Trying to find the script that disables tap-to-click, but can't locate the right settings. here is 50-synaptic.conf: # Example xorg.conf.d snippet that assigns the touchpad driver # to all touchpads. See xorg.conf.d(5) for more information on # InputClass. # DO NOT EDIT THIS FILE, your distribution will likely overwrite # it when updating. Copy (and rename) this file into # /etc/X11/xorg.conf.d first. # Additional options may be added in the form of # Option "OptionName" "value" # Section "InputClass" Identifier "touchpad catchall" Driver "synaptics" MatchIsTouchpad "on" # This option is recommend on all Linux systems using evdev, but cannot be # enabled by default. See the following link for details: # http://who-t.blogspot.com/2010/11/how-to-ignore-configuration-errors.html MatchDevicePath "/dev/input/event*" EndSection Any ideas would be gratefully received, it's driving me mad!

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• Consulting Expertise

  - by Oracle OpenWorld Blog Team

  Consult with the Experts Onsite at Oracle OpenWorld by Karen Shamban Learn from Oracle Consulting experts how to maximize the value of your Oracle investments by attending one or more Oracle Consulting sessions. Topics include cloud architecture and implementations, Engineered Systems best practices, Oracle Fusion Applications migrations, and more. Or, stop by the Oracle Consulting Center or the Demo Stations in the Exhibition Halls to ask specific questions and get additional information. Are you an IT executive or enterprise architect?  Register for the information-packed Enterprise Architecture Summit on Wednesday, October 12. To see the full range of Oracle Consulting activities at Oracle OpenWorld, click here.

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• Machine check error while booting from USB

  - by javanna

  I put the last Ubuntu iso on my USB stick using UNetBootin, after formatting it to fat32. I've already done that before with other operating systems and it worked. I can't actually boot Ubuntu from USB since I get a black screen with the error "Machine check error" on top the an automatic reboot happens. The error appears right after the boot, I can't see anything else before. I'm using my ASUS K53SV latop. Does anybody know how to solve this?

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• New technical whitepaper on Database-as-a-Service

  - by Javier Puerta

  High Availability Best Practices for Database Consolidation- The Foundation for Database-as-a-Service. An Oracle White Paper - April 2014 This paper provides MAA best practices for Database Consolidation using Oracle Multitenant. It describes standard HA architectures that are the foundation for DBaaS. It is most appropriate for a technical audience: Architects, Directors of IT and Database Administrators responsible for the consolidation and migration of traditional database deployments to DBaaS.  Recommended best practices are equally relevant to any platform supported by Oracle Database except where explicitly noted as being an optimization or an example that applies only to Oracle Engineered systems. 

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• The SQL Server ODBC Driver for Linux is Available!

  - by The Official Microsoft IIS Site

  The first beta release of the SQL Server ODBC Driver for Linux is available for download! As announced in October , the “Multiplatform Team” (a.k.a. the “MPlat Team”) has released a preview version of a driver that will provide first-class access to SQL Server from applications running on Linux operating systems. The team is looking for feedback on this release to incorporate into their production-ready release, so try it out and let us know what you think. Here are the important...(read more)

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• 12.04 cannot boot from USB

  - by GhostRider

  The HP Pavilion g6 notebook is unable to boot from bootable USB stick created with Linux Live USB Creator. I was able to boot other systems using the same pendrive. I have changed the boot priority using F10. When I restarted, it didn't ask for any message like Press any key to boot from When I press F19, and selected the pendrive from the available options to boot from, while restarting it gives me a message: error while trying to boot selected boot image Though I looked into the possible suggestions here, none of them worked. Looking for any help? EDIT: I was able to fix the first issue, i'e ubuntu could be installed as secure boot option in the bios was not allowing the pendrive or cd/dvd to be detected. Now once i have successfully installed ubuntu 12.04, after the restart i was unable to find it in the os menu for selection and windows8 loaded by default Ubuntu version: 12.04

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• Is the Windows Start button an example of poor mapping? [migrated]

  - by user336359

  In my recent course on HCI, I've been told that start button on Windows systems is an example of poor mapping. The reason for that, as explained in materials, is that it doesn't start anything, but rather reveals a menu. I think that this is only valid if you approaching this from low level of abstraction (meaning that the button must start something). If you on the other hand take a view on this from higher level of abstraction, as of "Place where I start most of my tasks", i.e. This is the place where you are start*ing the task of switching off your computer This is the place where you are start*ing the task of searching for something on your computer This is the place where you are start*ing the task of running a program This is the place where you are start*ing the task ... Then I think it makes perfect sense and has perfect mapping. Is this a sensible interpretation?

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• Useful programming languages for hardware programming

  - by Sebastian Griotberg

  I am thinking to take the next semester a course called "Digital systems architecture", and I know that we need to program micro-controllers with several programming languages such as C, C++, verilog, and VHDL. I want to be prepared to take that course, but I need to know if I need to study deeper these languages. At this moment, I have taken one course in basic Java dealing with basic methods, data types, loop structures, vectors, matrices, and GUI programing. Must I study deeper Java and then go with C, and C++? Besides, I know basic verilog and VHDL.

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