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  • Prepare the Best SEO Strategies

    SEO or Search Engine optimization is a process or technique followed to rank your website on top of the search engines. In which, developing an SEO Strategy that typically suits a website is most important.

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  • Best C++ Portable time library for game development

    - by Darkenor
    I'm venturing into the dark world of portable development and I'm looking for a nice library to keep track of system time for all game events. So far I've turned to trust boost and found: This boost library But I'm wondering if it there are some alternatives. I use boost a lot and (while I like it) I find that it sometimes takes me longer to figure out how to use the generic code than to write my own...not-so-generic code. (Ya, ya...I know. I should be less lazy). But anyway, advice appreciated! :)

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  • SecureAsia@Tokyo 2012??????????

    - by user762552
    ?????????????facebook?????????????????????···??????????SecureAsia@Tokyo 2012???????????????????????????????????????????????????????1.??????????????(DAY2:7?18?11:15-12:00)???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????(1) ???????????(2)????????????????????????????????????????????????????????????????????????????????????????????????????????????(7?12-13?)???????????7?12???????????????????????????????????????????????????????????????Oracle Database Firewall?????????????????????????:2.????????????????????????????????·???????(???????????????????)???Howard A.Schmidt?????·??????????????????????????????????????????????????????????????????????????(?????????????)?????????????????????????????????????????????? ?????(????????????????)?????????? 3.ISLA???????????????????????????????ISC2??????????????Information Security Leadership Achievement(ISLA)????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????(???????????????????)??????????????????????????????????????????···??????????????????????????

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  • ????????: EXACHK - EXADATA?????? (Exachk???????)

    - by Steve He(???)
    ???????: ?? Exachk ????????;???? Exachk ?? Exadata ???????, ??? Oracle ???????????????????, ?????????, ????, ?? Exadata ???????? ??: 2013?1?17???????3:00 ??: https://oracleaw.webex.com/oracleaw/onstage/g.php?d=592264766&t=a ?????????,???????????: ?? ID: 71587530 UK standard International:+44 1452 562 665 South China Free call: 1080 044 111 82 North China Free call: 1080 074 413 29 Taiwan Free call: 0080 104 4259 Hong Kong Free Call: 8009 661 55

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  • ????????Solaris: ???????????????

    - by Yusuke.Yamamoto
    ????? ??:2010/11/25 ??:?????? ??????? Solaris ?????????????????????????NIC?TCP/IP??????????????????????????????????????????????????????????????????????????????????? Solaris ???????????????????????? ???????????????????????????????????????????????????????????????????????????????????????????????????????CPU???????????????????????????????????????????????????????????????????????IP??????????IP???????????????????????????????TCP????????TCP???????????????????????????????????????????????????????????????????????????????????????? ????????? ????????????????? http://www.oracle.com/technology/global/jp/ondemand/otn-seminar/pdf/Homma_Network_201011.pdf

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  • ????????????????

    - by user762552
    ??????????????????????????????????DB Online??????????Database Vault??????????????Oracle Database Vault??????????? ?????????????????????????????????????????”??”???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????···????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????

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  • Prefer extension methods for encapsulation and reusability?

    - by tzaman
    edit4: wikified, since this seems to have morphed more into a discussion than a specific question. In C++ programming, it's generally considered good practice to "prefer non-member non-friend functions" instead of instance methods. This has been recommended by Scott Meyers in this classic Dr. Dobbs article, and repeated by Herb Sutter and Andrei Alexandrescu in C++ Coding Standards (item 44); the general argument being that if a function can do its job solely by relying on the public interface exposed by the class, it actually increases encapsulation to have it be external. While this confuses the "packaging" of the class to some extent, the benefits are generally considered worth it. Now, ever since I've started programming in C#, I've had a feeling that here is the ultimate expression of the concept that they're trying to achieve with "non-member, non-friend functions that are part of a class interface". C# adds two crucial components to the mix - the first being interfaces, and the second extension methods: Interfaces allow a class to formally specify their public contract, the methods and properties that they're exposing to the world. Any other class can choose to implement the same interface and fulfill that same contract. Extension methods can be defined on an interface, providing any functionality that can be implemented via the interface to all implementers automatically. And best of all, because of the "instance syntax" sugar and IDE support, they can be called the same way as any other instance method, eliminating the cognitive overhead! So you get the encapsulation benefits of "non-member, non-friend" functions with the convenience of members. Seems like the best of both worlds to me; the .NET library itself providing a shining example in LINQ. However, everywhere I look I see people warning against extension method overuse; even the MSDN page itself states: In general, we recommend that you implement extension methods sparingly and only when you have to. (edit: Even in the current .NET library, I can see places where it would've been useful to have extensions instead of instance methods - for example, all of the utility functions of List<T> (Sort, BinarySearch, FindIndex, etc.) would be incredibly useful if they were lifted up to IList<T> - getting free bonus functionality like that adds a lot more benefit to implementing the interface.) So what's the verdict? Are extension methods the acme of encapsulation and code reuse, or am I just deluding myself? (edit2: In response to Tomas - while C# did start out with Java's (overly, imo) OO mentality, it seems to be embracing more multi-paradigm programming with every new release; the main thrust of this question is whether using extension methods to drive a style change (towards more generic / functional C#) is useful or worthwhile..) edit3: overridable extension methods The only real problem identified so far with this approach, is that you can't specialize extension methods if you need to. I've been thinking about the issue, and I think I've come up with a solution. Suppose I have an interface MyInterface, which I want to extend - I define my extension methods in a MyExtension static class, and pair it with another interface, call it MyExtensionOverrider. MyExtension methods are defined according to this pattern: public static int MyMethod(this MyInterface obj, int arg, bool attemptCast=true) { if (attemptCast && obj is MyExtensionOverrider) { return ((MyExtensionOverrider)obj).MyMethod(arg); } // regular implementation here } The override interface mirrors all of the methods defined in MyExtension, except without the this or attemptCast parameters: public interface MyExtensionOverrider { int MyMethod(int arg); string MyOtherMethod(); } Now, any class can implement the interface and get the default extension functionality: public class MyClass : MyInterface { ... } Anyone that wants to override it with specific implementations can additionally implement the override interface: public class MySpecializedClass : MyInterface, MyExtensionOverrider { public int MyMethod(int arg) { //specialized implementation for one method } public string MyOtherMethod() { // fallback to default for others MyExtension.MyOtherMethod(this, attemptCast: false); } } And there we go: extension methods provided on an interface, with the option of complete extensibility if needed. Fully general too, the interface itself doesn't need to know about the extension / override, and multiple extension / override pairs can be implemented without interfering with each other. I can see three problems with this approach - It's a little bit fragile - the extension methods and override interface have to be kept synchronized manually. It's a little bit ugly - implementing the override interface involves boilerplate for every function you don't want to specialize. It's a little bit slow - there's an extra bool comparison and cast attempt added to the mainline of every method. Still, all those notwithstanding, I think this is the best we can get until there's language support for interface functions. Thoughts?

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  • Educause Top-Ten IT Issues - the most change in a decade or more

    - by user739873
    The Education IT Issue Panel has released the 2012 top-ten issues facing higher education IT leadership, and instead of the customary reshuffling of the same deck, the issues reflect much of the tumult and dynamism facing higher education generally.  I find it interesting (and encouraging) that at the top of this year's list is "Updating IT Professionals' Skills and Roles to Accommodate Emerging Technologies and Changing IT Management and Service Delivery Models."  This reflects, in my view, the realization that higher education IT must change in order to fully realize the potential for transforming the institution, and therefore it's people must learn new skills, understand and accept new ways of solving problems, and not be tied down by past practices or institutional inertia. What follows in the remaining 9 top issues all speak, in some form or fashion, to the need for dramatic change, but not just in the areas of "funding IT" (code for cost containment or reduction), but rather the need to increase effectiveness and efficiency of the institution through the use of technology—leveraging the wave of BYOD (Bring Your Own Device) to the institution's advantage, rather than viewing it as a threat and a problem to be contained. Although it's #10 of 10, IT Governance (and establishment and implementation of the governance model throughout the institution) is key to effectively acting upon many of the preceding issues in this year's list.  In the majority of cases, technology exists to meet the needs and requirements to effectively address many of the challenges outlined in top-ten issues list. Which brings me to my next point. Although I try not to sound too much like an Oracle commercial in these (all too infrequent) blog posts, I can't help but point out how much confluence there is between several of the top issues this year and what my colleagues and I have been evangelizing for some time. Starting from the bottom of the list up: 1) I'm gratified that research and the IT challenges it presents has made the cut.  Big Data (or Large Data as it's phased in the report) is rapidly going to overwhelm much of what exists today even at our most prepared and well-equipped research universities.  Combine large data with the significantly more stringent requirements around data preservation, archiving, sharing, curation, etc. coming from granting agencies like NSF, and you have the brewing storm that could result in a lot of "one-off" solutions to a problem that could very well be addressed collectively and "at scale."   2) Transformative effects of IT – while I see more and more examples of this, there is still much more that can be achieved. My experience tells me that culture (as the report indicates or at least poses the question) gets in the way more than technology not being up to task.  We spend too much time on "context" and not "core," and get lost in the weeds on the journey to truly transforming the institution with technology. 3) Analytics as a key element in improving various institutional outcomes.  In our work around Student Success, we see predictive "academic" analytics as essential to getting in front of the Student Success issue, regardless of how an institution or collections of institutions defines success.  Analytics must be part of the fabric of the key academic enterprise applications, not a bolt-on.  We will spend a significant amount of time on this topic during our semi-annual Education Industry Strategy Council meeting in Washington, D.C. later this month. 4) Cloud strategy for the broad range of applications in the academic enterprise.  Some of the recent work by Casey Green at the Campus Computing Survey would seem to indicate that there is movement in this area but mostly in what has been termed "below the campus" application areas such as collaboration tools, recruiting, and alumni relations.  It's time to get serious about sourcing elements of mature applications like student information systems, HR, Finance, etc. leveraging a model other than traditional on-campus custom. I've only selected a few areas of the list to highlight, but the unifying theme here (and this is where I run the risk of sounding like an Oracle commercial) is that these lofty goals cry out for partners that can bring economies of scale to bear on the problems married with a deep understanding of the nuances unique to higher education.  In a recent piece in Educause Review on Student Information Systems, the author points out that "best of breed is back". Unfortunately I am compelled to point out that best of breed is a large part of the reason we have made as little progress as we have as an industry in advancing some of the causes outlined above.  Don't confuse "integrated" and "full stack" for vendor lock-in.  The best-of-breed market forces that Ron points to ensure that solutions have to be "integratable" or they don't survive in the marketplace. However, by leveraging the efficiencies afforded by adopting solutions that are pre-integrated (and possibly metered out as a service) allows us to shed unnecessary costs – as difficult as these decisions are to make and to drive throughout the organization. Cole

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  • Configuring MySQL Cluster Data Nodes

    - by Mat Keep
    0 0 1 692 3948 Homework 32 9 4631 14.0 Normal 0 false false false EN-US JA X-NONE /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:12.0pt; font-family:Cambria; mso-ascii-font-family:Cambria; mso-ascii-theme-font:minor-latin; mso-hansi-font-family:Cambria; mso-hansi-theme-font:minor-latin; mso-ansi-language:EN-US;} In my previous blog post, I discussed the enhanced performance and scalability delivered by extensions to the multi-threaded data nodes in MySQL Cluster 7.2. In this post, I’ll share best practices on the configuration of data nodes to achieve optimum performance on the latest generations of multi-core, multi-thread CPU designs. Configuring the Data Nodes The configuration of data node threads can be managed in two ways via the config.ini file: - Simply set MaxNoOfExecutionThreads to the appropriate number of threads to be run in the data node, based on the number of threads presented by the processors used in the host or VM. - Use the new ThreadConfig variable that enables users to configure both the number of each thread type to use and also which CPUs to bind them too. The flexible configuration afforded by the multi-threaded data node enhancements means that it is possible to optimise data nodes to use anything from a single CPU/thread up to a 48 CPU/thread server. Co-locating the MySQL Server with a single data node can fully utilize servers with 64 – 80 CPU/threads. It is also possible to co-locate multiple data nodes per server, but this is now only required for very large servers with 4+ CPU sockets dense multi-core processors. 24 Threads and Beyond! An example of how to make best use of a 24 CPU/thread server box is to configure the following: - 8 ldm threads - 4 tc threads - 3 recv threads - 3 send threads - 1 rep thread for asynchronous replication. Each of those threads should be bound to a CPU. It is possible to bind the main thread (schema management domain) and the IO threads to the same CPU in most installations. In the configuration above, we have bound threads to 20 different CPUs. We should also protect these 20 CPUs from interrupts by using the IRQBALANCE_BANNED_CPUS configuration variable in /etc/sysconfig/irqbalance and setting it to 0x0FFFFF. The reason for doing this is that MySQL Cluster generates a lot of interrupt and OS kernel processing, and so it is recommended to separate activity across CPUs to ensure conflicts with the MySQL Cluster threads are eliminated. When booting a Linux kernel it is also possible to provide an option isolcpus=0-19 in grub.conf. The result is that the Linux scheduler won't use these CPUs for any task. Only by using CPU affinity syscalls can a process be made to run on those CPUs. By using this approach, together with binding MySQL Cluster threads to specific CPUs and banning CPUs IRQ processing on these tasks, a very stable performance environment is created for a MySQL Cluster data node. On a 32 CPU/Thread server: - Increase the number of ldm threads to 12 - Increase tc threads to 6 - Provide 2 more CPUs for the OS and interrupts. - The number of send and receive threads should, in most cases, still be sufficient. On a 40 CPU/Thread server, increase ldm threads to 16, tc threads to 8 and increment send and receive threads to 4. On a 48 CPU/Thread server it is possible to optimize further by using: - 12 tc threads - 2 more CPUs for the OS and interrupts - Avoid using IO threads and main thread on same CPU - Add 1 more receive thread. Summary As both this and the previous post seek to demonstrate, the multi-threaded data node extensions not only serve to increase performance of MySQL Cluster, they also enable users to achieve significantly improved levels of utilization from current and future generations of massively multi-core, multi-thread processor designs. A big thanks to Mikael Ronstrom, Senior MySQL Architect at Oracle, for his work in developing these enhancements and best practices. You can download MySQL Cluster 7.2 today and try out all of these enhancements. The Getting Started guides are an invaluable aid to quickly building a Proof of Concept Don’t forget to check out the MySQL Cluster 7.2 New Features whitepaper to discover everything that is new in the latest GA release

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  • What is the best SOHO NAS currently available?

    - by VinceJS
    What is the "best" Small Office Home Office (SOHO) Network Attached Storage (NAS) device available? Best performance vs. cost that is! I am looking for one that I can use at home to safely store my pictures, videos. What features should I look for? There are so many NAS reviews on the web, how do you choose the right one?

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  • What is the best SOHO NAS currently available?

    - by VinceJS
    What is the "best" Small Office Home Office (SOHO) Network Attached Storage (NAS) device available? Best performance vs. cost that is! I am looking for one that I can use at home to safely store my pictures, videos. What features should I look for? There are so many NAS reviews on the web, how do you choose the right one?

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  • Best way to connect a desktop computer to a 3g network

    - by dbyrne
    A friend of mine is moving to a building with no Internet connectivity. Ethernet and wifi are out of the question. What is the best way for him to get his desktop connected? The most obvious solution is for him to get an unlimited 3G data plan. What is the best way for him to set this up? I am assuming he should get something like Verizon's MiFi 3G access point, but does this have an ethernet jack?

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  • Best Free ISO Mounting Software for Windows

    - by Brett Veenstra
    What do you find as the best ISO / disk image mounting software out there? You can give a nod to $$$ alternatives, but I'm looking for the best freeware and support for DVD-size images as well. EDIT I actually use Virtual Clone Drive regularly, and would recommend that over anything else.

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  • Best way to connect a desktop computer to a 3g network

    - by dbyrne
    A friend of mine is moving to a building with no Internet connectivity. Ethernet and wifi are out of the question. What is the best way for him to get his desktop connected? The most obvious solution is for him to get an unlimited 3G data plan. What is the best way for him to set this up? I am assuming he should get something like Verizon's MiFi 3G access point, but does this have an ethernet jack?

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  • Hibernate: how to call a stored function returning a varchar?

    - by Péter Török
    I am trying to call a legacy stored function in an Oracle9i DB from Java using Hibernate. The function is declared like this: create or replace FUNCTION Transferlocation_Fix (mnemonic_code IN VARCHAR2) RETURN VARCHAR2 After several failed tries and extensive googling, I found this thread on the Hibernate forums which suggested a mapping like this: <sql-query name="TransferLocationFix" callable="true"> <return-scalar column="retVal" type="string"/> select Transferlocation_Fix(:mnemonic) as retVal from dual </sql-query> My code to execute it is Query query = session.getNamedQuery("TransferLocationFix"); query.setParameter("mnemonic", "FC3"); String result = (String) query.uniqueResult(); and the resulting log is DEBUG (org.hibernate.jdbc.AbstractBatcher:366) - - about to open PreparedStatement (open PreparedStatements: 0, globally: 0) DEBUG (org.hibernate.SQL:401) - - select Transferlocation_Fix(?) as retVal from dual TRACE (org.hibernate.jdbc.AbstractBatcher:484) - - preparing statement TRACE (org.hibernate.type.StringType:133) - - binding 'FC3' to parameter: 2 TRACE (org.hibernate.type.StringType:133) - - binding 'FC3' to parameter: 2 java.lang.NullPointerException at oracle.jdbc.ttc7.TTCAdapter.newTTCType(TTCAdapter.java:300) at oracle.jdbc.ttc7.TTCAdapter.createNonPlsqlTTCColumnArray(TTCAdapter.java:270) at oracle.jdbc.ttc7.TTCAdapter.createNonPlsqlTTCDataSet(TTCAdapter.java:231) at oracle.jdbc.ttc7.TTC7Protocol.doOall7(TTC7Protocol.java:1924) at oracle.jdbc.ttc7.TTC7Protocol.parseExecuteDescribe(TTC7Protocol.java:850) at oracle.jdbc.driver.OracleStatement.doExecuteQuery(OracleStatement.java:2599) at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:2963) at oracle.jdbc.driver.OraclePreparedStatement.executeUpdate(OraclePreparedStatement.java:658) at oracle.jdbc.driver.OraclePreparedStatement.execute(OraclePreparedStatement.java:736) at com.mchange.v2.c3p0.impl.NewProxyCallableStatement.execute(NewProxyCallableStatement.java:3044) at org.hibernate.dialect.Oracle8iDialect.getResultSet(Oracle8iDialect.java:379) at org.hibernate.jdbc.AbstractBatcher.getResultSet(AbstractBatcher.java:193) at org.hibernate.loader.Loader.getResultSet(Loader.java:1784) at org.hibernate.loader.Loader.doQuery(Loader.java:674) at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:236) at org.hibernate.loader.Loader.doList(Loader.java:2220) at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2104) at org.hibernate.loader.Loader.list(Loader.java:2099) at org.hibernate.loader.custom.CustomLoader.list(CustomLoader.java:289) at org.hibernate.impl.SessionImpl.listCustomQuery(SessionImpl.java:1695) at org.hibernate.impl.AbstractSessionImpl.list(AbstractSessionImpl.java:142) at org.hibernate.impl.SQLQueryImpl.list(SQLQueryImpl.java:152) at org.hibernate.impl.AbstractQueryImpl.uniqueResult(AbstractQueryImpl.java:811) at com.my.project.SomeClass.method(SomeClass.java:202) ... Any clues what am I doing wrong? Or any better ways to call this stored function?

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  • *Client* scalability for large numbers of remote web service calls

    - by Yuriy
    Hey Guys, I was wondering if you could share best practices and common mistakes when it comes to making large numbers of time-sensitive web service calls. In my case, I have a SOAP and an XML-RPC based web service to which I'm constantly making calls. I predict that this will soon become an issue as the number of calls per second will grow. On a higher level, I was thinking of batching those calls and submitting those to the web services every 100 ms. Could you share what else works? On a lower level side of the things, I use Apache Xml-Rpc client and standard javax.xml.soap.* packages for my client implementations. Are you aware of any client scalability related tricks/tips/warnings with these packages? Thanks in advance Yuriy

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  • When to log exception?

    - by Rune
    try { // Code } catch (Exception ex) { Logger.Log("Message", ex); throw; } In the case of a library, should I even log the exception? Should I just throw it and allow the application to log it? My concern is that if I log the exception in the library, there will be many duplicates (because the library layer will log it, the application layer will log it, and anything in between), but if I don't log it in the library, it'll be hard to track down bugs. Is there a best practices for this?

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  • Suggestions for Single-Page Web Application Design?

    - by DaveDev
    My view is that unless you need to change the basic structure of the user interface, you should not have to reload the page at all for any user interactions. I'd like to approach my next ASP.NET MVC project with this in mind. Can anyone suggest any principles, patterns or practices* I should consider? Excellent book, btw. Still trying to wrap my head around some of the concepts though. I thought a question like this would help link the theory to a practical design. Thanks

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  • Is url.openStream harmful?

    - by Casebash
    I was using the java.net.URL.openStream() method to retrieve content from the server. I recently ran into an issue where the HTTP Response code indicated an error, but instead of throwing an exception, the stream still was read anyway. This caused the error to appear much later in the execution and proved to be a red herring. As far as I can see, when you have opened a stream using this method, there is no way to check the HTTP response code. The only way I could find to handle this properly was to use code such as: HttpURLConnection conn=(HttpURLConnection) url.openConnection() if(conn.getResponseCode()!=HttpStatus.SC_OK) //Raise Exception; InputStream in=conn.getInputStream() So do you agree? Is it possible to use openStream safely, or is it a method that should be avoided at all costs. It is worth noting that Sun uses the method in their tutorial code for reading directly from a URL. Then again, the code throws Exception so it isn't exactly a bastion of good coding practices.

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