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• Why can't I grant exec on dbms_lock.sleep() OR create a procedure using it (but I can run it fine on its own)

  - by Richard Green

  I am trying to write a small bit of PL/SQL that has a non-CPU burning sleep in it. The following works in sqldeveloper begin dbms_lock.sleep(5); end; BUT (as the same user), I can't do the following: create or replace procedure sleep(seconds in number) is begin dbms_lock.sleep(seconds); end; without the error "identifer "DBMS_LOCK" must be declared... Funny as I could run it without a procedure. Just as strange, when I log in as a DBA, I can run the command grant exec on dbms_lock to public; and I get ERROR at line 1: ORA-00990: missing or invalid privilege This is oracle version "Oracle Database 11g Express Edition Release 11.2.0.2.0 - 64bit Production"

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• Wireless network unavailable, no networks found after Windows update

  - by jacobsee

  Old Dell Inspiron 8200 laptop with Linksys Wireless G network adapter card (WPC54G v2). Wireless connection was working fine. Then I ran a bunch of windows updates, I think the last one was the recent .NET 3.5 service pack update. Now wireless networks won't connect. Using windows to manage wireless, no networks show up. I'm typing right now on another laptop where wireless is working fine. I've restarted router & Dell laptop several times. Tried to Repair wireless connection and refresh network list. Also restarted DHCP and WZC service, all to no avail. I then uninstalled .NET 3.5 SP (don't remember number) and .NET 3.0 SP2. I don't remember all the windows updates that I just ran because I haven't used this laptop in a while so had to catch up on some updates.

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• Applescript to connect to bluetooth device

  - by Mark117

  I'm trying to create an applescript to allow me to connect to a bluetooth device by it's Bluetooth ID. So far, i've managed to get an applescript to turn on bluetooth if it's off. Here's the code: # This is only necessary, if AppleScripts are not yet allowed to change checkboxes tell application "System Events" to set UI elements enabled to true # Now change the bluetooth status tell application "System Preferences" set current pane to pane id "com.apple.preferences.bluetooth" tell application "System Events" tell process "System Preferences" # Enabled is checkbox number 2 if value of checkbox 2 of window "Bluetooth" is 0 then click checkbox 2 of window "Bluetooth" end if end tell end tell quit end tell Would someone know if and how it's possible to set up a new bluetooth device and if it'd be posible to connect to a device based on it's device name/ it's device bluetooth ID? I've also tried to record the action in Automator but for the "set up new device" option, Automator just tells me: "click on "" button". Thanks

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• Building Private IaaS with SPARC and Oracle Solaris

  - by ferhat

  A superior enterprise cloud infrastructure with high performing systems using built-in virtualization! We are happy to announce the expansion of Oracle Optimized Solution for Enterprise Cloud Infrastructure with Oracle's SPARC T-Series servers and Oracle Solaris.  Designed, tuned, tested and fully documented, the Oracle Optimized Solution for Enterprise Cloud Infrastructure now offers customers looking to upgrade, consolidate and virtualize their existing SPARC-based infrastructure a proven foundation for private cloud-based services which can lower TCO by up to 81 percent(1). Faster time to service, reduce deployment time from weeks to days, and can increase system utilization to 80 percent. The Oracle Optimized Solution for Enterprise Cloud Infrastructure can also be deployed at up to 50 percent lower cost over five years than comparable alternatives(2). The expanded solution announced today combines Oracle’s latest SPARC T-Series servers; Oracle Solaris 11, the first cloud OS; Oracle VM Server for SPARC, Oracle’s Sun ZFS Storage Appliance, and, Oracle Enterprise Manager Ops Center 12c, which manages all Oracle system technologies, streamlining cloud infrastructure management. Thank you to all who stopped by Oracle booth at the CloudExpo Conference in New York. We were also at Cloud Boot Camp: Building Private IaaS with Oracle Solaris and SPARC, discussing how this solution can maximize return on investment and help organizations manage costs for their existing infrastructures or for new enterprise cloud infrastructure design. Designed, tuned, and tested, Oracle Optimized Solution for Enterprise Cloud Infrastructure is a complete cloud infrastructure or any virtualized environment  using the proven documented best practices for deployment and optimization. The solution addresses each layer of the infrastructure stack using Oracle's powerful SPARC T-Series as well as x86 servers with storage, network, virtualization, and management configurations to provide a robust, flexible, and balanced foundation for your enterprise applications and databases.  For more information visit Oracle Optimized Solution for Enterprise Cloud Infrastructure. Solution Brief: Accelerating Enterprise Cloud Infrastructure Deployments White Paper: Reduce Complexity and Accelerate Enterprise Cloud Infrastructure Deployments Technical White Paper: Enterprise Cloud Infrastructure on SPARC (1) Comparison based on current SPARC server customers consolidating existing installations including Sun Fire E4900, Sun Fire V440 and SPARC Enterprise T5240 servers to latest generation SPARC T4 servers. Actual deployments and configurations will vary. (2) Comparison based on solution with SPARC T4-2 servers with Oracle Solaris and Oracle VM Server for SPARC versus HP ProLiant DL380 G7 with VMware and Red Hat Enterprise Linux and IBM Power 720 Express - Power 730 Express with IBM AIX Enterprise Edition and Power VM.

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• How to write a "nested IF formula" in Excel?

  - by Mike

  I manually enter numbers on one cell according to text values in the cell adjacent to it. Is there a way to use the IF function to help me manage this? The text is automatically generated with a report but I put the numbers in manually in Excel. Example of my weekly boredom below: number Text in Cell 3 Order A 3 Order A 1 Order C 2 Order B 3 Order A 1 Order C 2 Order B 2 Order B HELP! My eyes and soul hurt each time I need to do this. Thanks Mike

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• I would like to start multiple computers at once, What software do I use?

  - by Matt 'Trouble' Esse

  I have turned on Wake On Lan on all of the BIOSes in the PCs and I have a simple batch file that runs a free command wolcmd.exe Wake on Lan Command Line The syntax is as follows: wolcmd [mac address] [ip address] [subnet mask] [port number] The batch file looks a little like this.... wolcmd 009027a324fe 195.188.159.20 255.255.255.0 8900 wolcmd 009024a731da 212.86.64.31 255.255.255.0 8900 It's OK but It's not very user friendly (I need to set this up for other people to use and administer) Can you suggest a Windows (XP/Vixta/7) Alternative with a GUI? Free is cool, but a good paid for version is fine if you think it's worth it! Thanks in advance for your informed suggestions

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• Tap into MySQL's Amazing Performance Results with the Performance Tuning Course

  - by Antoinette O'Sullivan

  Want to leverage the high-speed load utilities, distinctive memory caches, full text indexes, and other performance-enhancing mechanisms that MySQL offers to fuel today's critical business systems. The authentic MySQL Performance Tuning course, in 4 days, teaches you to evaluate the MySQL architecture, learn to use the tools, configure the database for performance, tune application and SQL code, tune the server, examine the storage engines, assess the application architecture, and learn general tuning concepts. You can take this course in one the following three ways: Training-on-Demand: Access the streaming video, instructor delivery of this course from your own desk, at your own pace. Book time for hands-on practice when it suits you. Live-Virtual Class: Take this instructor-led class live from your own desk. With 700 events on the schedule you are sure to find a time and date to suit you! In-Class: Travel to a classroom to take this class. A sample of events on the schedule are as follows.  Location  Date  Delivery Language  Hamburg, Germany  22 October 2012  German  Prague, Czech Republic  1 October 2012  Czech  Warsaw, Poland  3 December 2012  Polish  London, England  19 November 2012  English  Rome, Italy  23 October 2012  Italian Lisbon, Portugal  6 November 2012  European Portugese  Aix en Provence, France  4 September 2012   French  Strasbourg, France 16 October 2012   French  Nieuwegein, Netherlands 26 November 2012   Dutch  Madrid, Spain 17 December 2012   Spanish  Mechelen, Belgium  1 October 2012  English  Riga, Latvia  10 December 2012  Latvian  Petaling Jaya, Malaysia  10 September 2012 English   Edmonton, Canada 10 December 2012   English  Vancouver, Canada 10 December 2012   English  Ottawa, Canada 26 November 2012   English  Toronto, Canada 26 November 2012   English  Montreal, Canada 26 November 2012   English  Mexico City, Mexico 10 September 2012   Spanish  Sao Paolo, Brazil 26 November 2012  Brazilian Portugese   Tokyo, Japan 19 November 2012   Japanese  Tokyo, Japan  19 November 2012  Japanese For further information on this class, or to register your interest in additional events, go to the Oracle University Portal: http://oracle.com/education/mysql

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• Best method to organize/manage dependencies in the VCS within a large solution

  - by SnOrfus

  A simple scenario: 2 projects are in version control The application The test(s) A significant number of checkins are made to the application daily. CI builds and runs all of the automation nightly. In order to write and/or run tests you need to have built the application (to reference/load instrumented assemblies). Now, consider the application to be massive, such that building it is prohibitive in time (an entire day to compile). The obvious side effect here, is that once you've performed a build locally, it is immediately inconsistent with latest. For instance: If I were to sync with latest, and open up one of the test projects, it would not locally build until I built the application. This is the same when syncing to another branch/build/tag. So, in order to even start working, I need to wait a day to build the application locally, so that the assemblies could be loaded - and then those assemblies wouldn't be latest. How do you organize the repository or (ideally) your development environment such that you can continually develop tests against whatever the current build is, or a given specific build, while minimizing building the application as much as possible?

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• Should I be an algorithm developer, or java web frameworks type developer?

  - by Derek

  So - as I see it, there are really two kinds of developers. Those that do frameworks, web services, pretty-making front ends, etc etc. Then there are developers that write the algorithms that solve the problem. That is, unless the problem is "display this raw data in some meaningful way." In that case, the framework/web developer guy might be doing both jobs. So my basic problem is this. I have been an algorithms kind of software developer for a few years now. I double majored in Math and Computer science, and I have a master's in systems engineering. I have never done any web-dev work, with the exception of a couple minor jobs, and some hobby level stuff. I have been job interviewing lately, and this is what happens: Job is listed as "programmer- 5 years of experience with the following: C/C++, Java,Perl, Ruby, ant, blah blah blah" Recruiter calls me, says they want me to come in for interview In the interview, find out they have some webservices development, blah blah blah When asked in the interview, talk about my experience doing algorithms, optimization, blah blah..but very willing to learn new languages, frameworks, etc Get a call back saying "we didn't think you were a fit for the job you interviewed wtih, but our algorithm team got wind of you and wants to bring you on" This has happened to me a couple times now - see a vague-ish job description looking for a "programmer" Go in, find out they are doing some sort of web-based tool, maybe with some hardcore algorithms running in the background. interview with people for the web-based tool, but get an offer from the algorithms people. So the question is - which job is the better job? I basically just want to get a wide berth of experience at this level of my career, but are algorithm developers so much in demand? Even more so than all these supposed hot in demand web developer guys? Will I be ok in the long run if I go into the niche of math based algorithm development, and just little to no, or hobby level web-dev experience? I basically just don't want to pigeon hole myself this early. My salary is already starting to get pretty high - and I can see a company later on saying "we really need a web developer, but we'll hire this 50k/year college guy, instead of this 100k/year experience algorithm guy" Cliffs notes: I have been doing algorithm development. I consider myself to be a "good programmer." I would have no problem picking up web technologies and those sorts of frameworks. During job interviews, I keep getting "we think you've got a good skillset - talk to our algorithm team" instead of wanting me to learn new skills on the job to do their web services or whhatever other new technology they are doing. Edit: Whenever I am talking about algorithm development here - I am talking about the code that produces the answer. Typically I think of more math-based algorithms: solving a financial problem, solving a finite element method, image processing, etc

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• A story from SQLvdb and Idera

  - by Peter Larsson

  A year or so back, I struggled with some consistency problems so I figured out I needed a way to "mount" backup files as a virtual database. At the time (SQL Server 2005 and SQL Server 2008) my choice fell on Idera's SQLvdb because it felt easy enough to use. I used it a few times and it worked great. Some time later we upgraded to SQL Server 2008R2 and I didn't use SQLvbd for a long time. Until yesterday... I was upset that suddenly SQLvbd took more than 2 hours to mount the backup file (if it succeeded at all). I uninstalled the application and went for lunch. After lunch, I decided to give SQLvbd another chance so I emailed their tech support and got a response within 30 minutes or so. Now, since I am a SQL Server MVP, they gave me another serial number than my first and I downloaded and installed a newer version. But also this version was really slow. I emailed back to them with the additional information they requested and to my surprise I had got an email this morning when I came back to work, where Idera explained some of the issues (bugs) and asked my to test a newer version. I did, and now a fresh mount of a 100GB database (compressed to 20GB with native compression) located on our SAN takes less than 6 minutes! Thank you. //Peter

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• Turn off tap-to-select on IBM UltraNav keyboard

  - by gworley3

  I have an IBM UltraNav USB keyboard with a trackpoint and a touchpad. Using xinput I've gotten a number of things working how I would like, but I've got one remaining problem. I can't find a way to turn off tap-to-select on the touchpad. I've searched around and everyone describes how to do it using the synaptics driver, but for some reason I can't seem to get this installed and working correctly on my Ubuntu 10.04 install. What can I do to turn this feature off without having synaptics? I'm about to lose my mind from all the accidental clicks.

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• Linux Router - Share bandwidth per IPs with current active connections

  - by SRoe

  We have a Linux machine running as a custom router, currently utilising Shorewall. This sits between our incoming internet connection and the internal LAN. What we would like to achieve is 'fair use' of the bandwidth on a per IP basis. If only one person currently has an active connection then they get 100% utilisation of the line. However if 20 people have active connections then they should each get 5% utilisation of the line. This should be irrespective of the number of connections held by each user. For example, say we have two users, Bill and Ted, that both have active connections. Bill has a single active connection while Ted has ten active connections. Bill should get 50% utilisation for his single connections whilst Ted should get 5% utilisation for each of his ten connections, giving Ted a total utilisation of 50%.

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• How can i control how much Authority RRs a DNS answer returns ?

  - by Benoît

  Hello, i quite don't understand Authority RRs. Using dig to resolve some random A records, my caching DNS server sometimes also return Authority RRs and sometimes not. The number and the type of the returned Authority RRs also vary a lot. What does control whether Authority RRs are returned or not on a standard client query ? Is it a client or server setting ? What does control how many Authoriy RRs are returned ? What does control of the type of the Authority RRs records returned ? Sometimes it's multiple NS, sometimes it's a SOA. It's also often comes with Additional RRs of type A about the Authority RRs NS returned. I'm really looking for a RFC or kind of describing this. Thanks.

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• variables in batch files

  - by richzilla

  Hi All, Im trying to set up a batch file to automatically deploy a php app to a web server, and basically what i want is an entirely automated process where i would just give it a revision number from the repository and it would then export the files, upload via ftp and then update deployment info at the repo host (codebase). However, im starting from scratch here, and im wanting to know, how would i set up a batch file to accept a variable when it was run, for example typing myfile.bat /revision 42 would enable me to deploy revision 42 to my server. if anyone can point me in the right direction id be very appreciated.

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• Mixed Solaris 10 and 11 versions in logical domains on the same server

  - by jsavit

  One question that comes up frequently is whether you can mix Solaris 10 and Solaris 11 in different logical domains under Oracle VM Server for SPARC. The answer is yes depending only on the system software requirements for the underlying hardware platform. Different versions of Solaris 10 and 11 can exist side-by-side on the same server and can act as control, service, I/O or guest domains subject only to the minimum software levels documented in the System Requirements section of the Oracle VM Server for SPARC Release Notes. Here's an example just taken from a running system. First, here's the control domain, which is running Solaris 10. I've highlighted a guest running Solaris 11. # uname -a SunOS atl-sewr-24 5.10 Generic_147440-01 sun4v sparc SUNW,SPARC-Enterprise-T5220 # ldm -V Logical Domains Manager (v 2.1) Hypervisor control protocol v 1.7 Using Hypervisor MD v 1.3 System PROM: Hypervisor v. 1.10.0 @(#)Hypervisor 1.10.0 2011/04/27 16:19\015 # ldm list NAME STATE FLAGS CONS VCPU MEMORY UTIL UPTIME primary active -n-cv- SP 16 4G 1.6% 120d 17h atl-sewr-pool-148 active -n---- 5001 8 2G 0.1% 119d 21h atl-sewr-pool-152 active -n---- 5000 8 4G 0.2% 112d 19h atl-sewr-pool-154 active -n---- 5002 8 2G 0.1% 120d 15h atl-sewr-pool-155 active -n---- 5003 16 2G 0.0% 26d 14h 30m This system is running Oracle VM Server 2.1 with a Solaris 10 control domain. Hmm, I should update this machine to 2.2 when I get a few free moments. Upgrading is very straightforward. Here's a display logging into the highlighted guest: Last login: Mon May 21 10:18:16 2012 from dhcp-adc-twvpn- Oracle Corporation SunOS 5.11 11.0 November 2011 sewr@atl-sewr-pool-152:~$ uname -a SunOS atl-sewr-pool-152 5.11 11.0 sun4v sparc SUNW,SPARC-Enterprise-T5220 sewr@atl-sewr-pool-152:~$ cat /etc/release Oracle Solaris 11 11/11 SPARC Copyright (c) 1983, 2011, Oracle and/or its affiliates. All rights reserved. Assembled 18 October 2011 sewr@atl-sewr-pool-152:~$ sudo virtinfo -ct Password: Domain role: LDoms guest Control domain: atl-sewr-24 sewr@atl-sewr-pool-152:~$ That's running the GA version of Solaris 11, so I probably should update that some time too. Note the use of the virtinfo -ct command that lets the guest get information about the hosting environment. Summary You can mix and match versions of Solaris in logical domains. All the different combinations work: Solaris 10 and/or Solaris 11 control and service domains with Solaris 10 and/or Solaris 11 guests. Mixing different guest OS levels on the same server is one of the traditional reasons for using virtual machines in the first place since virtual machines were invented some 40 years ago, used to run production and test systems in parallel while upgrading OS levels. This can easily be done with Oracle VM Server for SPARC (Logical Domains).

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• Remove IP address from the URL of website using apache

  - by sapatos

  I'm on an EC2 instance and have a domain domain.com linked to the EC2 nameservers and it happily is serving my pages if I type domain.com in the URL. However when the page is served it resolves the url to: 1.1.1.10/directory/page.php. Using apache I've set up the following VirtualHost, following examples provided at http://httpd.apache.org/docs/2.0/dns-caveats.html Listen 80 NameVirtualHost 1.1.1.10:80 <VirtualHost 1.1.1.10:80> DocumentRoot /var/www/html/directory ServerName domain.com # Other directives here ... <FilesMatch "\.(ico|pdf|flv|jpg|jpeg|png|gif|js|css|swf)$"> Header set Cache-Control "max-age=290304000, public" </FilesMatch> </VirtualHost> However I'm not getting any changes to how the URL is displayed. This is the only VirtualHost configured on this site and I've confirmed its the one being used as I've managed to break it a number of times whilst experimenting with the configuration. The route53 entries I have are: domain.com A 1.1.1.10 domain.com NS ns-11.awsdns-11.com ns-111.awsdns-11.net ns-1111.awsdns-11.org ns-1111.awsdns-11.co.uk domain.com SOA ns-11.awsdns-11.com. awsdns-hostmaster.amazon.com. 1 1100 100 1101100 11100

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• MongoDB ReplicaSet Elections when some nodes are down

  - by SecondThought

  I'm trying to get into ReplicaSet concept, and found something weird in mongoDB Documentation: For a node to be elected primary, it must receive a majority of votes. This is a majority of all votes in the set: if you have a 5-member set and 4 members are down, a majority of the set is still 3 members (floor(5/2)+1). Each member of the set receives a single vote and knows the total number of available votes. If no node can reach a majority, then no primary can be elected and no data can be written to that replica set (although reads to secondaries are still possible). (taken from here) So, If I got that right, in the 5-member case mentioned there the one node that's still standing WILL NOT be chosen as primary and the whole set will not get any writes? and that's even if this single node was the last primary before the elections? If it's true there can be many less-radical cases which will end up with a degenerated set. How can we avoid this?

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• Windows Server 2003 Synchronize Not Sticking

  - by lkessler

  We have a Windows Server 2003. It had Raid running on 2 disks. One disk failed and the Raid Controller failed. We replaced the disk and controller and restored everything. No data was lost. The users of that server found that there were a number of directories that appeared empty. We found that from their machine, we could right-click on the directory and select "Synchronize" and the files in the directory would now be visible to them. However, when opening Internet Explorer and browsing the web and ftp'ing to a web site, the files in the directory would vanish. We would have to "Synchronize" them again to get them to reappear. What is going on to cause this need to Synchronize and then re-Synchronize again? What do we need to do to fix this so that the directories are permanently visible?

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• Sorry. Not Much Happened Today!

  - by steve.diamond

  And THAT blog headline is dedicated to Seth Godin, who recently wrote that unlike its print brethren, digital media outlets aren't burdened with having to make their articles long enough to match the number of surrounding ad pages. He states that just because you CAN write more doesn't mean you SHOULD. Well, you don't have to tell me that twice. So to continue my rambling entry today, I'd suggest you read this post by Donal Daly on 10 steps to intelligent Social CRM for Sales. No seriously, read it. It's almost like a Groundswell Cliff Notes for sales people. I particularly love his third point. Of course I haven't "gotten" it yet, but I've got a whole life time, for crying out loud. Seriously, this is a great read and a fast one. And finally, in the department of longer reads, a thanks and shout out to Paul Greenberg for mentioning Oracle's new iPad app for Siebel CRM in his ZDNet blog. Hey, I warned you...not much happened today. Per se!

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• Putting codes in email subjects

  - by Christian W

  We send out large quantities of email to our customers (work environment surveys). Sometimes our mailinglist for a client isn't quite up to date and we get bounce mails (address not found and such). However, since these all bounce back to the same address it's difficult to keep track on which bounce belongs to which client. (The email subject is usually pretty generic, like "Welcome to the work environment survey") This is why I would like to insert a identifier in the subject line of the email. So the subject would be "Welcome to the work environment survey (1234)" where 1234 is a number identifying the client/survey. We already rank pretty high because of the way our mailer handles sending the mails. Usually we contact the clients it-dept to get them to whitelist us in their firewall/spamfilter. Would this increase our spamscore in spamfilters?

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• Email provider - suggestions needed

  - by Christian Fazzini

  We are looking for a good way to have email support. In theory, we need to allow end-users to send emails directly to support and careers. i.e. support@domain_name_here.com and careers@domain_name_here.com. Second, we need to provide emails to our staff. So each staff member has their own email address. i.e. joe@domain_name_here.com, meghan@domain_name_here.com, etc. Google Apps is one that we are considering. However, they are charging $50 per user, per year. Not so bad, considering the quality and the features they offer. However, there are also cheaper alternatives. i.e. my domain registrar offers an email plan for $20 / year / 10 emails. Go Daddy has a number of plans and still a lot more affordable than Google Apps. So far Namecheap and Go Daddy are the only ones I have looked at for email plans. Is it worth signing up with Google Apps? Or are there better alternatives? Your thoughts?

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• Chatbox/shoutbox/forum with the following features.

  - by Mick

  I would like to set up a simple forum for a small number of users. The features I would like are the following, in order of priority: logging on not compulsory for posting. A single thread. All the messages are immediately visible - no need to "open" them. most recent message at the top by default. The ability to give selected users the power to delete spam messages. The ability to upload photos. Avatars. Configurable skins/size/shape. So far the closest I have come is www.tag-world.com but there are no avatars and no photos.

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• game multiplayer service development

  - by nomad

  I'm currently working on a multiplayer game. I've looked at a number of multiplayer services(player.io, playphone, gamespy, and others) but nothing really hits the mark. They are missing features, lack platform support or cost too much. What I'm looking for is a simple poor man's version of steam or xbox live. Not the game marketplace side of those two but the multiplayer services. User accounts, profiles, presence info, friends, game stats, invites, on/offline messaging. Basically I'm looking for a unified multiplayer platform for all my games across devices. Since I can't find what I'm planning to roll my own piece by piece. I plan to save on server resources by making most of the communication p2p. Things like game data and voice chat can be handled between peers and the server keeps track of user presence and only send updates when needed or requested. I know this runs the risk of cheating but that isn't a concern right now. I plan to run this on a Amazon ec2 micro server for development then move to a small to large instance when finished. I figure user accounts would be the simplest to start with. Users can create accounts online or using in game dialog, login/out, change profile info. The user can access this info online or in game. I will need user authentication and secure communication between server and client. I figure all info will be stored in a database but I dont know how it can be stored securely and accessed from webserver and game services. I would appreciate and links to tutorials, info or advice anyone could provide to get me started. Any programming language is fine but I plan to use c# on the server and c/c++ on devices. I would like to get started right away but I'm in no hurry to get it finished just yet. If you know of a service that already fits my requirements please let me know.

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• Windows Azure Recipe: Big Data

  - by Clint Edmonson

  As the name implies, what we’re talking about here is the explosion of electronic data that comes from huge volumes of transactions, devices, and sensors being captured by businesses today. This data often comes in unstructured formats and/or too fast for us to effectively process in real time. Collectively, we call these the 4 big data V’s: Volume, Velocity, Variety, and Variability. These qualities make this type of data best managed by NoSQL systems like Hadoop, rather than by conventional Relational Database Management System (RDBMS). We know that there are patterns hidden inside this data that might provide competitive insight into market trends.  The key is knowing when and how to leverage these “No SQL” tools combined with traditional business such as SQL-based relational databases and warehouses and other business intelligence tools. Drivers Petabyte scale data collection and storage Business intelligence and insight Solution The sketch below shows one of many big data solutions using Hadoop’s unique highly scalable storage and parallel processing capabilities combined with Microsoft Office’s Business Intelligence Components to access the data in the cluster. Ingredients Hadoop – this big data industry heavyweight provides both large scale data storage infrastructure and a highly parallelized map-reduce processing engine to crunch through the data efficiently. Here are the key pieces of the environment: Pig - a platform for analyzing large data sets that consists of a high-level language for expressing data analysis programs, coupled with infrastructure for evaluating these programs. Mahout - a machine learning library with algorithms for clustering, classification and batch based collaborative filtering that are implemented on top of Apache Hadoop using the map/reduce paradigm. Hive - data warehouse software built on top of Apache Hadoop that facilitates querying and managing large datasets residing in distributed storage. Directly accessible to Microsoft Office and other consumers via add-ins and the Hive ODBC data driver. Pegasus - a Peta-scale graph mining system that runs in parallel, distributed manner on top of Hadoop and that provides algorithms for important graph mining tasks such as Degree, PageRank, Random Walk with Restart (RWR), Radius, and Connected Components. Sqoop - a tool designed for efficiently transferring bulk data between Apache Hadoop and structured data stores such as relational databases. Flume - a distributed, reliable, and available service for efficiently collecting, aggregating, and moving large log data amounts to HDFS. Database – directly accessible to Hadoop via the Sqoop based Microsoft SQL Server Connector for Apache Hadoop, data can be efficiently transferred to traditional relational data stores for replication, reporting, or other needs. Reporting – provides easily consumable reporting when combined with a database being fed from the Hadoop environment. Training These links point to online Windows Azure training labs where you can learn more about the individual ingredients described above. Hadoop Learning Resources (20+ tutorials and labs) Huge collection of resources for learning about all aspects of Apache Hadoop-based development on Windows Azure and the Hadoop and Windows Azure Ecosystems SQL Azure (7 labs) Microsoft SQL Azure delivers on the Microsoft Data Platform vision of extending the SQL Server capabilities to the cloud as web-based services, enabling you to store structured, semi-structured, and unstructured data. See my Windows Azure Resource Guide for more guidance on how to get started, including links web portals, training kits, samples, and blogs related to Windows Azure.

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• Acceptable sound quality: stereo needed for an Android game?

  - by Thomas Calc

  I have various simple short sound effects (damage sound, dying sound, thunderbolt, fanfare, breaking) for a game that is developed for Android currently. I use OGG files: 96kbps VBR, 44.1KHz, 2 channels (that means stereo, right?). I read the other stackexchange topics about "acceptable sound quality", but they're too general, address too many things. My experience is that even with 80kbps, my effects sound OK. But I tested it on a limited number of Android devices (including a Sony Ericsson Xperia Neo and a HTC Desire HD). My questions: For mobile phones and tablets, generally, what parameters are recommended? Won't my 80kbps sounds be bad on a newer device (such as a modern tablet)? I don't hear any difference between stereo and mono (2 channels vs. 1 channel, right?), is there any noticeable difference at all for mobile phones / tablets? (in terms of the player experience) May it worth it at all? I assume that stereo sounds take much more in memory (when they're decoded to PCM), despite of the fact that the compressed OGG size is practically the same. Reacting to Roy T.'s great comment: Actually, I couldn't measure the PCM size (Android decodes OGG internally), but I thought that stereo will take more space than mono when uncompressed After throwing out one of the WAV channels in Audacity, and re-exporting it: The new WAV file size is half than before The OGG file size is practically the same as before The sound effects and game music was recorded by my friend who is an experienced hobby musician/composer, but he knows little about computers & software so he just gave me some high-quality WAV files generated via his hardware.These were stereo, but if I check them in Audacity, both channels appear to be exactly the same.Can I consider them the same (= moving to mono), or might there be some unnoticeable differences to the human eye?

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