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• SAP Applications Run Better on Oracle Exadata

  - by jgelhaus

  To yield the results necessary to stay competitive, your business-critical applications must be able to access the most reliable and up-to-date information. That’s why a growing number of SAP application customers are turning to Oracle Exadata Database Machine for better performance, better productivity—and big savings. Watch our latest Webcast to find out why Oracle Exadata is the ideal platform for running your SAP applications. You’ll learn how you can: Increase the performance of SAP applications Enhance reliability with a centralized, scalable platform Ensure quick, safe, and easy deployments Watch it now. Highlights include customer case studies and practical deployment strategies. Watch our latest on-demand Webcast to find out why Oracle Exadata is the ideal platform for running your SAP applications. Learn how to increase the performance of SAP applications, enhance reliability with a centralized, scalable platform and ensure quick, safe and easy deployments.

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• SCHA API for resource group failover / switchover history

  - by krishna.k.murthy

  The Oracle Solaris Cluster framework keeps an internal log of cluster events, including switchover and failover of resource groups. These logs can be useful to Oracle support engineers for diagnosing cluster behavior. However, till now, there was no external interface to access the event history. Oracle Solaris Cluster 4.2 provides a new API option for viewing the recent history of resource group switchovers in a program-parsable format. Oracle Solaris Cluster 4.2 provides a new option tag argument RG_FAILOVER_LOG for the existing API command scha_cluster_get which can be used to list recent failover / switchover events for resource groups. The command usage is as shown below: # scha_cluster_get -O RG_FAILOVER_LOG number_of_days number_of_days : the number of days to be considered for scanning the historical logs. The command returns a list of events in the following format. Each field is separated by a semi-colon [;]: resource_group_name;source_nodes;target_nodes;time_stamp source_nodes: node_names from which resource group is failed over or was switched manually. target_nodes: node_names to which the resource group failed over or was switched manually. There is a corresponding enhancement in the C API function scha_cluster_get() which uses the SCHA_RG_FAILOVER_LOG query tag. In the example below geo-infrastructure (failover resource group), geo-clusterstate (scalable resource group), oracle-rg (failover resource group), asm-dg-rg (scalable resource group) and asm-inst-rg (scalable resource group) are part of Geographic Edition setup. # /usr/cluster/bin/scha_cluster_get -O RG_FAILOVER_LOG 3 geo-infrastructure;schost1c;;Mon Jul 21 15:51:51 2014 geo-clusterstate;schost2c,schost1c;schost2c;Mon Jul 21 15:52:26 2014 oracle-rg;schost1c;;Mon Jul 21 15:54:31 2014 asm-dg-rg;schost2c,schost1c;schost2c;Mon Jul 21 15:54:58 2014 asm-inst-rg;schost2c,schost1c;schost2c;Mon Jul 21 15:56:11 2014 oracle-rg;;schost2c;Mon Jul 21 15:58:51 2014 geo-infrastructure;;schost2c;Mon Jul 21 15:59:19 2014 geo-clusterstate;schost2c;schost2c,schost1c;Mon Jul 21 16:01:51 2014 asm-inst-rg;schost2c;schost2c,schost1c;Mon Jul 21 16:01:10 2014 asm-dg-rg;schost2c;schost2c,schost1c;Mon Jul 21 16:02:10 2014 oracle-rg;schost2c;;Tue Jul 22 16:58:02 2014 oracle-rg;;schost1c;Tue Jul 22 16:59:05 2014 oracle-rg;schost1c;schost1c;Tue Jul 22 17:05:33 2014 Note that in the output some of the entries might have an empty string in the source_nodes. Such entries correspond to events in which the resource group is switched online manually or during a cluster boot-up. Similarly, an empty destination_nodes list indicates an event in which the resource group went offline. - Arpit Gupta, Harish Mallya

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• How to change mimetype image for PSD file (Photoshop)?

  - by ubuntico

  Following this link https://help.ubuntu.com/community/AddingMimeTypes, I first typed a command to discover the mimetype for psd extension ~$ grep 'psd' /etc/mime.types image/x-photoshop psd Then I took Photoshop CS5 SVG image from Wikipedia and renamed it to image-x-photoshop.svg. Then I copied the file to the folder /usr/share/icons/gnome/scalable via command sudo cp image-x-photoshop.svg /usr/share/icons/gnome/scalable/image-x-photoshop.svg Loogged out, logged in, but the icon for the .psd files is still unchanged. Does anyone know what I am doing wrong? I use Ubuntu 10.10. Thanks in advance

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• New Solaris Cluster!

  - by Jeff Victor

  We released Oracle Solaris Cluster 4.1 recently. OSC offers both High Availability (HA) and also Scalable Services capabilities. HA delivers automatic restart of software on the same cluster node and/or automatic failover from a failed node to a working cluster node. Software and support is available for both x86 and SPARC systems. The Scalable Services features manage multiple cluster nodes all providing a load-balanced service such as web servers or app serves. OSC 4.1 includes the ability to recover services from software failures, failure of hardware components such as DIMMs, CPUs, and I/O cards, a global file system, rolling upgrades, and much more. Oracle Availability Engineering posted a brief description and links to details. Or, you can just download it now!

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• Blender 2.6: How to Merge the Pros of Meshes and Surfaces

  - by fridojet

  there are two interesting kinds of objects: Meshes and Surfaces. Each of them offers very cool features. Object Type Specific Features Nice Features of Surfaces: (for example) They're as scalable as vector graphics (really nice!) You can build winding things real simply. Nice Features of Meshes: (for example) You can build organic things really good using the Sculpt Mode and a graphic tablet. You can use some special things like Physics. My Question There are things for which Surfaces are better and things for which Meshes are better. But how can I use both the best features of Surfaces and the best features of Meshes on one object at once? For example: How can I use Physics (like on Meshes) on lossless scalable objects (like Surfaces)? Thanks.

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• A Look At The New Features In The ADO.NET Entity Framework 4.0

  Leverage the new and enhanced features of the Entity Framework 4.0 to design and implement scalable applications.

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• bosh hosting for google app engine

  - by cometta

  any recommendation on which company providing scalable bosh hosting? p/s: is there exist any scalable jabber server +bosh service using openfire?

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• Scalability of Ruby on Rails versus PHP

  - by Daniel

  Can anyone comment on which is more scalable between RoR and PHP? I have heard that RoR is less scalable than PHP since RoR has a little more overhead with its MVC framework while PHP is more low level and lighter. This is a bit vague - can anyone explain better?

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• What are the best ways to scale small business applications ?

  - by Rachel

  I have one small online sale business but I want to make it scalable at limited expense and so am looking out at various services which can help me make my business scalable. I was looking into Amazon Web Services and it seems to be a viable option. Are there any other ways for adding scalability to small online businesses ?

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• T-SQL Improvements And Data Types in ms sql 2008

  - by Aamir Hasan

   Microsoft SQL Server 2008 is a new version released in the first half of 2008 introducing new properties and capabilities to SQL Server product family. All these new and enhanced capabilities can be defined as the classic words like secure, reliable, scalable and manageable. SQL Server 2008 is secure. It is reliable. SQL2008 is scalable and is more manageable when compared to previous releases. Now we will have a look at the features that are making MS SQL Server 2008 more secure, more reliable, more scalable, etc. in details.Microsoft SQL Server 2008 provides T-SQL enhancements that improve performance and reliability. Itzik discusses composable DML, the ability to declare and initialize variables in the same statement, compound assignment operators, and more reliable object dependency information. Table-Valued ParametersInserts into structures with 1-N cardinality problematicOne order -> N order line items"N" is variable and can be largeDon't want to force a new order for every 20 line itemsOne database round-trip / line item slows things downNo ARRAY data type in SQL ServerXML composition/decomposition used as an alternativeTable-valued parameters solve this problemTable-Valued ParametersSQL Server has table variablesDECLARE @t TABLE (id int);SQL Server 2008 adds strongly typed table variablesCREATE TYPE mytab AS TABLE (id int);DECLARE @t mytab;Parameters must use strongly typed table variables Table Variables are Input OnlyDeclare and initialize TABLE variable  DECLARE @t mytab;  INSERT @t VALUES (1), (2), (3);  EXEC myproc @t;Procedure must declare variable READONLY  CREATE PROCEDURE usetable (    @t mytab READONLY ...)  AS    INSERT INTO lineitems SELECT * FROM @t;    UPDATE @t SET... -- no!T-SQL Syntax EnhancementsSingle statement declare and initialize  DECLARE @iint = 4;Compound Assignment Operators  SET @i += 1;Row constructors  DECLARE @t TABLE (id int, name varchar(20));  INSERT INTO @t VALUES    (1, 'Fred'), (2, 'Jim'), (3, 'Sue');Grouping SetsGrouping Sets allow multiple GROUP BY clauses in a single SQL statementMultiple, arbitrary, sets of subtotalsSingle read pass for performanceNested subtotals provide ever better performanceGrouping Sets are an ANSI-standardCOMPUTE BY is deprecatedGROUPING SETS, ROLLUP, CUBESQL Server 2008 - ANSI-syntax ROLLUP and CUBEPre-2008 non-ANSI syntax is deprecatedWITH ROLLUP produces n+1 different groupings of datawhere n is the number of columns in GROUP BYWITH CUBE produces 2^n different groupingswhere n is the number of columns in GROUP BYGROUPING SETS provide a "halfway measure"Just the number of different groupings you needGrouping Sets are visible in query planGROUPING_ID and GROUPINGGrouping Sets can produce non-homogeneous setsGrouping set includes NULL values for group membersNeed to distinguish by grouping and NULL valuesGROUPING (column expression) returns 0 or 1Is this a group based on column expr. or NULL value?GROUPING_ID (a,b,c) is a bitmaskGROUPING_ID bits are set based on column expressions a, b, and cMERGE StatementMultiple set operations in a single SQL statementUses multiple sets as inputMERGE target USING source ON ...Operations can be INSERT, UPDATE, DELETEOperations based onWHEN MATCHEDWHEN NOT MATCHED [BY TARGET] WHEN NOT MATCHED [BY SOURCE]More on MERGEMERGE statement can reference a $action columnUsed when MERGE used with OUTPUT clauseMultiple WHEN clauses possible For MATCHED and NOT MATCHED BY SOURCEOnly one WHEN clause for NOT MATCHED BY TARGETMERGE can be used with any table sourceA MERGE statement causes triggers to be fired onceRows affected includes total rows affected by all clausesMERGE PerformanceMERGE statement is transactionalNo explicit transaction requiredOne Pass Through TablesAt most a full outer joinMatching rows = when matchedLeft-outer join rows = when not matched by targetRight-outer join rows = when not matched by sourceMERGE and DeterminismUPDATE using a JOIN is non-deterministicIf more than one row in source matches ON clause, either/any row can be used for the UPDATEMERGE is deterministicIf more than one row in source matches ON clause, its an errorKeeping Track of DependenciesNew dependency views replace sp_dependsViews are kept in sync as changes occursys.dm_sql_referenced_entitiesLists all named entities that an object referencesExample: which objects does this stored procedure use?sys.dm_sql_referencing_entities 

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• What do you do when your boss doesn't care about code quality?

  - by Chad Johnson

  My boss (a proprietor) is a developer like me. He comes, however, from a C background and severely lacks knowledge of the benefits of proper object-oriented design. That, or he simply ignores them. So my co-worker developed this feature prototype in a week, and it's not release-ready--at least not from a good code standpoint. It works; it does the job--but it'sa freaking prototype. It's totally not scalable. My boss wants to wow clients and "just get the feature out." I understand that. But, we could take two weeks and finish this shit up, or we could take three and finish this shit up AND do it so that it's scalable. I just KNOW we are going to want to add onto this feature in the coming months, and then, a customer is going to "need it in a week," and so even though we've agreed to refactor when we want to add onto the feature, IT WILL NEVER HAPPEN! This ALWAYS happens. I'm the code quality assurance guy, but my boss seems to see me as a radical and thinks I just waste time, whereas I actually am trying to follow good, known solid design patterns. He just wants his stinking feature though, and he doesn't want to spend the time or money to do things well. He pretty much listens to what I have to say, and then he ultimately just makes the decision to take the shortest path (which cuts corners a lot). I often develop large, important features for our software. THOSE THINGS TAKE TIME! They're not happy with the time it's taken with past projects, though, but the features I've put in all work really damn well and are very scalable. How do you all deal with this kind of situation?

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• postgreSQL vs Cassandra vs MongoDB vs Voldemart ?

  - by ramonrails

  Which database to decide upon? Any comparisions? Existing: postgresql Issues Not easily scalable horizontal. Needs sharding etc Clustering does not solve the data growth problem Looking for: Any database that is easily horizontally scalable Cassandra (Twitter uses that?) MongoDB (rapidly gaining popularity) Voldemart Other? Why? Data growing with snowball effect existing postgresql locks table etc for vaccuum tasks periodically Archiving data is tideous currently Human interaction involved in existing archive, vaccuum, ... process periodically Need a 'set it. forget it. just add another server when data grows more.' type of solution

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• networked storage for a research group, 10-100 TB

  - by Marc

  this is related to this post: http://serverfault.com/questions/80854/scalable-24-tb-nas-for-research-department but perhaps a little more general. Background: We're a research lab of around 10 people who do a lot of experiments that involve taking pictures at one of several lab setups and then analyzing it an one of several lab computers. Each experiment may produce 2 or 3 GB of data, and we are generating data at the rate of about 10 TB/year. Right now, we are storing the data on a 6-bay netgear readynas pro, but even with 2 TB drive, this only gives us 10 TB of storage. Also, right now we are not backing up at all. Our short term backup plan is to get a second readynas, put it in a different building and mirror the one drive onto the other. Obviously, this is somewhat non-ideal. Our options: 1) We can pay our university $400/ TB /year for "backed up" online storage. We trust them more than we trust us, but not a whole lot. 2) We can continue to buy small NASs and mirror them between offices. One limit, although stupid, is that we don't have an unlimited number of ethernet jacks. 3) We can try to implement our own data storage solution, which is why I'm asking you guys. One thing to consider is that we're a very transient population and none of us are network administration experts. I will probably be here only another year or so, and graduate students, who are here the longest, have a 5-6 year time scale. So nothing can require expert oversight. Our data transfer rates are low - most of the data will just sit on the server waiting for someone to look at it once or twice - so we don't need a really high speed system. Given these contraints, can someone recommend a fairly low-cost, scalable, more or less turn key shared data storage system with backup in a separate physical location. Does such a thing exist or should we just pay the university to take care of it for us? As a second question, our professor just got tenure and is putting together a budget. Here the goal is to ask for as much as you can and hope you get a fraction of it. So the same question, minus the low-cost. Without budget constraints, can you recommend a scalable turn-key backed up storage system. Thanks

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• Apache mod_wsgi elegant clustering method

  - by Dr I

  I'm currently trying to build a scalable infrastructure for my Python webservers. Actually, I'm trying to find the most elegant way to build a scalable cluster to host all my Python WebServices. For now, I'm using three servers like this: 1 x PuppetMaster to deploy my servers. 2 x Apache Reverse Proxy Front-end servers. 1 x Apache HTTPd Server which host the Python WSGI Applications and binded to using mod_wsgi. 4 x MongoDB Clustered server. Everything is OK concerning the Reverse proxy and the DB Backend, I'm able to easily add a new Reverse Proxy and a new DB Node, but my problem is about the Python WebServer. I thinked to just provision a new node with exactly the same configuration and a rsync replication between the two nodes, but It's not really usefull in term of deployement for my developpers etc. So if you have a solution which is as efficient and elegant that the Tomcat Cluster I'll be really happy to ear it ;-)

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• The Social Business Thought Leaders - John Hagel

  - by kellsey.ruppel

  While many European economies are on the brink of a recession between increasing taxation and mounting loss of jobs and bankruptcy filing rates, there's an understandable risk of losing sight of the deeper forces at play. Yet instead of surrendering to uncertainty and trying to survive in the short term, many organizations are feeling the urge to be better prepared to thrive in these complex times by developing a more articulated long term understanding of both the opportunities / challenges ahead. For example: What long-term economic, technological and societal changes are rolling out? Which foundational dynamics will affect our companies' performance, productivity, competition, and innovative potential in the upcoming decades? How will digital infrastructure change our business landscape? What kind of capabilities will be key to compete in a market shaped by growing turbulence, unpredictability and volatility? Breaking out from a strictly cyclical thinking, studies such as the Shift Index by John Hagel, Co-Chairman of the Center for the Edge at Deloitte & Touche (See Measuring the forces of long-term change - The 2009 Shift Index), depict a worrying performance challenge that affected every industry in the entire US economy over the last 45 years. Amidst a more than doubled competitive intensity of the market, and even with an improved labor productivity, the actual performance of US firms has consistently fallen to 25% of what it was in 1965. Most of this reported value is shifting from institutions and organizations to individuals, whether they are customers or young creative talent. To thrive in the digital economy and reverse declining performance trends, companies will have to fundamentally rethink their management approach by moving from knowledge stocks to knowledge flows, from scalable efficiency to scalable learning, from push organizations to pull organizations. Based on the outcomes of the Shift Index and on the book The Power of Pull, the first episode of the Social Business Thought-Leaders features John Hagel to provide strategic insights on how companies will succeed in the 21st century.

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• Oracle Tuxedo at Oracle Open World 2012

  - by Deepak Goel

  Oracle Open World is almost here. There is quite a bit of Tuxedo to talk about at this year’s OOW. Primary focus will be on Tuxedo 12c, which was announced in August 2012 and is now generally available. Tuxedo 12c is a major release which many-many new and exciting features in almost all components of Tuxedo. You will not only hear about these features in various conference  sessions, you will also have an opportunity to see these features in action at demo grounds or play with these yourselves in hands-on-labs. Following is listing of Tuxedo related activities at OOW 2012: Conference Sessions Mon 1 Oct, 2012 10:45 AM - 11:45 AM, Oracle Tuxedo: What’s New in 12 c, Strategy, and Roadmap, Moscone South - 309 4:45 PM - 5:45 PM, Simplify Operations, Administration, and Management of Oracle Tuxedo Applications, Marriott Marquis - Golden Gate C3 Wed 3 Oct, 2012 3:30 PM - 4:30 PM, The Art and Practice of Mainframe Migration and Modernization, Moscone South - 309 Thu 4 Oct, 2012  2:15 PM - 3:15 PM, High-Performance, Scalable Enterprise Messaging for C/C++/COBOL Applications, Marriott Marquis - Salon 7 HOL (Hands-on Lab) Tues 2 Oct, 2012 5:00 PM - 6:00 PM Deploy, Manage, and Monitor Oracle Tuxedo Applications in the Enterprise Cloud, Marriott Marquis - Salon 3/4 Wed 3 Oct, 2012 1:15 PM - 2:15 PM, Develop C/C++ Applications for the Cloud with Oracle Tuxedo and Oracle Solaris Studio, Marriott Marquis - Salon 5/6 BOF (Birds-of-a-Feather) Mon 1 Oct, 2012 6:15 PM - 7:00 PM, Develop Scalable, Highly Available Enterprise Services in Java with Oracle Tuxedo, Marriott Marquis - Golden Gate C1 Demos Oracle Tuxedo: #1 Enterprise Cloud Platform for C/C++/COBOL Apps,  Moscone South, Right - S-215 Mainframe Rehost with Oracle Tuxedo Runtimes for CICS, IMS, and Batch, Moscone South, Right - S-216 Tuxedo Customer Appreciation Dinner Monday 1 Oct, 2012 7:30 PM - Please contact your Oracle Account Representative to attend. Limited seating. Deepak Goel Sr. Director, Software Development Oracle

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• New York Coherence Special Interest Group, Jan 13 2011

  - by ruma.sanyal

  Please join us for our next exciting event. We are pleased to announce that Aleksander Seovic, Craig Blitz and Madhav Sathe will be presenting to our group. Presentation details are provided below. Time: 3:00pm - 6:00pm ET Where: Oracle Office, Room 30076, 520 Madison Avenue, 30th Floor, NY We will be providing snacks and beverages. Register! - Registration is required for building security. Presentations:? Getting the Most out of your Coherence Cluster with Oracle Enterprise Manager - Madhav Sathe, Principal Product Manager (Oracle) How To Build a Coherence Practice - Craig Blitz, Senior Principal Product Manager (Oracle) Congratulations on your decision to buy Oracle Coherence. We believe you have chosen an excellent product. Now the hard work begins. To help you get the most out of Coherence from both a project and enterprise perspective, this talk will introduce you to resources available from Oracle and through the Coherence ecosystem. The talk will also discuss best organizational practices you can implement to ensure success with Coherence. The speaker will use his significant experience with customers' Coherence deployment to show what works and what doesn't in practice. Coherence in the Cloud - Aleksandar Seovic, Founder and Managing Director (S4HC) Amazon Web Services cloud provides great and affordable foundation for the next generation of scalable web applications. Application servers, load balancers, and scalable storage can be provisioned in a matter of minutes and used for pennies an hour. However, AWS cloud also brings a set of new architectural challenges, such as transient file systems and dynamically assigned IP addresses. In this session we will look at a real-world example of how Coherence can be used to address some of these challenges and show why the combination of AWS cloud and Coherence has a great synergy.

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• Oracle(R) Buys Pre-Paid Software Assets From eServGlobal

  - by Paulo Folgado

  Oracle to Deliver Scalable Carrier-Grade Pre-Paid Solution Based on Open, Flexible IT-Based Platform News Facts ·        Oracle has agreed to acquire certain pre-paid assets of eServGlobal, a provider of advanced IT-based, pre-paid charging solutions for the communications industry. ·        eServGlobal's Universal Service Platform (USP) includes a pre-paid charging application, a network-services platform and a messaging gateway. The ChargingMax, NumberMax, uVOMS, MessageMax, PromoMax Express and Social Relationship Management software currently supports more than 25 tier-one customers including the world's largest IT-based installation of pre-paid services. ·        The combination of Oracle Communications Billing and Revenue Management and the USP applications is expected to accelerate the shift from network- to IT-based pre-paid systems by providing the first convergent, open IT-based platform from a leading business software and hardware systems company. ·        Customers are expected to benefit from traditional carrier-grade, pre-paid service authorization with IT-grade flexibility that supports any service or network, is easier to deploy and maintain and delivers an overall lower total cost of ownership. ·        The transaction is expected to close in the second half of this year. Supporting Quote ·        "The majority of mobile phone users worldwide use pre-paid plans, and that number is growing exponentially. Oracle Communications applications combined with the pre-paid software assets from eServGlobal will provide our customers with highly available and scalable carrier-grade, pre-paid software on an open, convergent platform. This will enable our customers to deliver traditional pre-paid voice services and easily introduce hybrid pre-paid and post-paid plans with targeted pricing, promotions and service bundles that include voice, data and network services," said Liam Maxwell, vice president of products, Oracle Communications. Supporting Resources About Oracle and eServGlobal USP General Presentation FAQ

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• Which web framework or technologies would suit me?

  - by Suraj Chandran

  Hi, I had been working on desktop apps and server side(non web) for some time and now I am diving in to web first time. I plan to write a scalable enterprise level app. I have worked with Java, Javascript, Jquery etc. but I absolutely hate jsp. So is there any framework that focuses on developing enterprise level web apps without jsp. I liked Wicket's approach, but I think there is a little lack of support of dynamic html in it and jquery(yes i looked at wiquery). Also I feel making wicket apps scalable would take some sweat. Can Spring MVC, Struts2 etc. help me make with this with just using say Java, JavaScript, and JQuery. Or are there any other options for me like Wicket. Please do forgive if anything above looks insane, I am still working on my understanding with enterprise web apps. NOTE: If you think that I should take a different direction or approach, please do suggest!

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• Rant - Why is Windows Azure not available in Africa?

  - by Allan Rwakatungu

  Yesterday at the .NET user group meeting in Kampala Uganda  I gave a talk on cloud computing with Windows Azure  (details will be in my next blog post). The guys where excited. Without owning they own inftrastucture and at low cost they can build scalable , highly available applications. Not quite. Azure accounts are only available to people in particular countries - none from Africa. I attended PDC in 2008 when Microsoft unleashed Windows Azure. One of the case studies to show the benefits ofr cloud computing was a project in Africa for an education service in Ethiopia. The point they where making was that the cloud was perfect for scenarios where computing infrastructure is not sophiscated, like Ethiopia. Perfect , i thought. So i got my beta account from PDC and started playing around in the cloud. Then Azure goes live , my beta account does not work any more and I cant pay because am from Uganda. Microsoft , this sucks. I dont know the reasons for Microsoft doing this, but am sure we can work out something. We in Africa need the cloud more than anybody else in the world. Setting up data centers that are higly scalable and available for our startups is not an option we have. But we also cant pay for cloud computing with Microsoft. Microsoft, we know we are a tiny insigficant market for a company your size, but your excluding us only continues to widen the digital divide. Microsoft , how about you have a reseller model for cloud computing. Instead of trying to deal direclty with each client you have local partners who help you sell and bill your cloud services. I think that would lead to Windows Azure being available in Africa. I can help you resell in Uganda.

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• Why do the GNOME symbolic icons appear darker in a running application?

  - by David Planella

  I'm creating an application that uses symbolic icons from the default theme. However, there are a few icons that I need that cannot be represented by those from the default theme, so I'm creating my own ones. What I did was to simply go to /usr/share/icons/gnome/scalable/actions/, copied a few locally into my app's source tree that could serve as a basis, and started editing them. So far so good. But I've noticed the following: all symbolic icons are of a light grey color when looking at the original .svg file, but when they are put onto a widget, they become darker. Here's an example, using the /usr/share/icons/gnome/scalable/actions/view-refresh-symbolic.svg icon from the default theme: Here's what it looks like when opening the original with Inkscape: And here's what it looks like on a toolbar on a running application: Notice the icon being much darker at runtime. That happens both with the Ambiance and Radiance themes. I wouldn't mind much, but I noticed it affects my custom icon, whereby parts of it become darker (the inner fill), whereas parts of it remain the same color as the original (the stroke). So what causes the default symbolic icons to darken and how should implement that for my custom icons?

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• Are scheduled job servers the right choice for a time sensitive game engine?

  - by maple_shaft

  I am currently architecting and designing an exciting new web application that will be entering into some areas that I have very little experience in, game development. The application is not necessarily a game, but there are some very time sensitive tasks and scheduled jobs that a server will need to run to perform game related activities (Eg. New match up starts at noon every day for a 12 day tournament, updating scoreboards at 5pm every day, etc...) In the past I have typically used cron jobs with the Quartz Scheduler running within a web application server, but I know that this isn't likely a scalable solution for the truly massive userbase that management is telling me to expect (Granted they are management and are probably highly optimistic about this) and also for how important the role of these tasks are in this web application. The other important thing I want to consider is that I want to avoid SPOF (Single Point Of Failure). If the primary job server goes down, another job server should be able to successfully run the job in its place. I suppose this can be done appropriately record locking and database transactions. My question is if scheduled jobs like CRON running on a web application server are a wise design choice given the time sensitive game tasks of this application, or is there something more appropriate for running a scalable game engine parallel to the web application servers?

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• Big Data – Role of Cloud Computing in Big Data – Day 11 of 21

  - by Pinal Dave

  In yesterday’s blog post we learned the importance of the NewSQL. In this article we will understand the role of Cloud in Big Data Story What is Cloud? Cloud is the biggest buzzword around from last few years. Everyone knows about the Cloud and it is extremely well defined online. In this article we will discuss cloud in the context of the Big Data. Cloud computing is a method of providing a shared computing resources to the application which requires dynamic resources. These resources include applications, computing, storage, networking, development and various deployment platforms. The fundamentals of the cloud computing are that it shares pretty much share all the resources and deliver to end users as a service.  Examples of the Cloud Computing and Big Data are Google and Amazon.com. Both have fantastic Big Data offering with the help of the cloud. We will discuss this later in this blog post. There are two different Cloud Deployment Models: 1) The Public Cloud and 2) The Private Cloud Public Cloud Public Cloud is the cloud infrastructure build by commercial providers (Amazon, Rackspace etc.) creates a highly scalable data center that hides the complex infrastructure from the consumer and provides various services. Private Cloud Private Cloud is the cloud infrastructure build by a single organization where they are managing highly scalable data center internally. Here is the quick comparison between Public Cloud and Private Cloud from Wikipedia:   Public Cloud Private Cloud Initial cost Typically zero Typically high Running cost Unpredictable Unpredictable Customization Impossible Possible Privacy No (Host has access to the data Yes Single sign-on Impossible Possible Scaling up Easy while within defined limits Laborious but no limits Hybrid Cloud Hybrid Cloud is the cloud infrastructure build with the composition of two or more clouds like public and private cloud. Hybrid cloud gives best of the both the world as it combines multiple cloud deployment models together. Cloud and Big Data – Common Characteristics There are many characteristics of the Cloud Architecture and Cloud Computing which are also essentially important for Big Data as well. They highly overlap and at many places it just makes sense to use the power of both the architecture and build a highly scalable framework. Here is the list of all the characteristics of cloud computing important in Big Data Scalability Elasticity Ad-hoc Resource Pooling Low Cost to Setup Infastructure Pay on Use or Pay as you Go Highly Available Leading Big Data Cloud Providers There are many players in Big Data Cloud but we will list a few of the known players in this list. Amazon Amazon is arguably the most popular Infrastructure as a Service (IaaS) provider. The history of how Amazon started in this business is very interesting. They started out with a massive infrastructure to support their own business. Gradually they figured out that their own resources are underutilized most of the time. They decided to get the maximum out of the resources they have and hence  they launched their Amazon Elastic Compute Cloud (Amazon EC2) service in 2006. Their products have evolved a lot recently and now it is one of their primary business besides their retail selling. Amazon also offers Big Data services understand Amazon Web Services. Here is the list of the included services: Amazon Elastic MapReduce – It processes very high volumes of data Amazon DynammoDB – It is fully managed NoSQL (Not Only SQL) database service Amazon Simple Storage Services (S3) – A web-scale service designed to store and accommodate any amount of data Amazon High Performance Computing – It provides low-tenancy tuned high performance computing cluster Amazon RedShift – It is petabyte scale data warehousing service Google Though Google is known for Search Engine, we all know that it is much more than that. Google Compute Engine – It offers secure, flexible computing from energy efficient data centers Google Big Query – It allows SQL-like queries to run against large datasets Google Prediction API – It is a cloud based machine learning tool Other Players Besides Amazon and Google we also have other players in the Big Data market as well. Microsoft is also attempting Big Data with the Cloud with Microsoft Azure. Additionally Rackspace and NASA together have initiated OpenStack. The goal of Openstack is to provide a massively scaled, multitenant cloud that can run on any hardware. Thing to Watch The cloud based solutions provides a great integration with the Big Data’s story as well it is very economical to implement as well. However, there are few things one should be very careful when deploying Big Data on cloud solutions. Here is a list of a few things to watch: Data Integrity Initial Cost Recurring Cost Performance Data Access Security Location Compliance Every company have different approaches to Big Data and have different rules and regulations. Based on various factors, one can implement their own custom Big Data solution on a cloud. Tomorrow In tomorrow’s blog post we will discuss about various Operational Databases supporting Big Data. Reference: Pinal Dave (http://blog.sqlauthority.com) Filed under: Big Data, PostADay, SQL, SQL Authority, SQL Query, SQL Server, SQL Tips and Tricks, T SQL

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• What is the advantage of WSDualHttpBinding in WCF?

  - by schmoopy

  How much benefit would there be to using WSDualHttpBinding with IIS hosted service vs. a client poll that calls the WCF service, assuming in the latter the service cached the data in question? This scenerio would be for a notify type of service where the clients need to be notified by the service when an event occurs. Specifically, what advantages would WSDualHttpBinding provide over polling? ie: Less network traffic, faster to design, easier to maintain, more control ??? From what i understand, WSDualHttpBinding is less scalable than client polling, so why use it at all? Edit: As Matt supplied, time critical can be one reason for the duplex binding. Here is what i have so far: WSDualHttpBinding adv: can get immediate response w/o waiting on polling timer dis: less scalable than WsHttpBinding dis: less firewall friendly I'll add to this based on comments, please let me know if i state anything incorrectly. thanks for you input :-)

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• Is tcerl for Mnesia production ready? Is there any alternatives?

  - by Sanoj

  I would like to create a scalable web service using Mnesia as database. However Mnesia per default isn't scalable for persistent storgage since it is using Dets (which has a 2GB limit) as backend. I have seen discussions about extending Mnesia with MnesiaEx and use tcerl as backend. It sounds good and have showed good performance. However, I have seen in a talk about Tokyo Cabinet and CouchDB with Mnesia that there are some issues: issues with durability issues with memory leaks issues with crashes Is tcerl + Mnesia really production ready? And is there any other alternatives? How doe´s companies overcome these issues if they use Mnesia in bigger systems? Is there a working solution with Mnesia and Tokyo Tyrant that is working better?

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