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  • Online Application Upgrade

    - by lsarecz
    Amikor HA (High Availability - Magas Rendelkezésre Állás) megoldásokról beszélünk, általában elsoként a klaszterek, redundáns megoldások jutnak eszünkbe. Pedig nem csak a hardver hibákra kell gondolni, hanem a tervezett leállásokkal is érdemes foglalkozni. Az egyik talán legkevésbé megoldott probléma az, ha egy alkalmazás verzió váltást kell végrehajtani úgy, hogy közben változik az adatstruktúra is. Ez nyilván azt eredményezi, hogy le kell állítani az adatbázist is, és az átszervezéseket, akár adat átalakításokkal együtt végre kell hajtani. De a legnagyobb probléma talán az, hogy amennyiben valami rosszul sül el, és vissza kell állni a kiinduló állapotra, akkor az adatbázis mentést is vissza kell tölteni, hiszen átmenetileg minden felhasználó aki épp használatba vette az új alkalmazás verziót már egy új adatstruktúrába kezdett dolgozni. Az Oracle Database Online Application Upgrade képessége, vagy pontosabb nevén az Edition Based Redefinition pontosan ezt a problémát célozza meg. Az Edition Based Redefinition 3 alap objektummal muködik, ezek: edition, editioning view és crossedition trigger. Az edition egy új nonschema objektum típus. 11gR2 verziótól minden adatbázis rendelkezik legalább egy edition-nel, melynek neve Ora$Base. Minden új edition egy már létezo gyermeke kell, hogy legyen. Amikor kapcsolódunk az adatbázishoz, meghatározható, hogy melyik edition-höz kapcsolódjunk. Kizárólag nézetek, szinonímák és PL/SQL ojektum típusoknak lehet több edíciója (ezek metadat típusú objektumok, nem tartalmaznak adatokat). Azok az objektumok, melyek több edícióval rendelkeznek egyedileg csak úgy azonosíthatók, ha az owner, name, namespace mellett az edition-t is megnevezzük. Azaz két vagy több példánya is létezhet egy adatbázison belül ugyanazzal az owner, name és namespace azonosítókkal rendelkezo objektumnak, amennyiben használjuk az edition-based redefinition-t. Egy új objektum típus, az editioning view is edicionálható. Mivel a fizikai tábla nem edicionálható (elkerülendo az adatok többszörös tárolását és teljesítmény gondokat), ezért az editioning view feladata egy adott tábla egyszeru leképezése egy nézet formájában, ami már több edition-ben is létezhet, és képes elfedni a tábla módosításait. Amennyiben a tábla módosítások olyan táblákat érintenek, amelyek tartalmát  az alkalmazás felhasználók módosítják, szükség van olyan triggerekre, amelyek az egyes editioning view-k között a módosításokat karbantartják. Ezek a crossedition triggerek. Természetesen ahhoz, hogy az online application upgrade muködjön, minden érintett tábla elé el kell készíteni az editioning nézetet és a megfelelo crossedition triggereket. Ezeket használva az alkalmazás két vagy több különbözo verzió képes ugyanazon adatbázison párhuzamosan futni, és ha megtörtént a verzióváltás, akkor még mindig egyszeru visszaállni a régi verzióra egészen addig, amíg a régi edition eldobásra nem kerül. További információk az Edition-Based Redefinition címu whitepaper-ben találhatók.

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  • Brother MFC 7220 Replacement Toner

    In years past, printers were solely for the purpose of making copies in the office. Today, printers come with many functions so many office functions can be done using the same equipment. The Brother... [Author: Ben Pate - Computers and Internet - March 31, 2010]

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  • Des chercheurs de Google revoient les fondements de SSL, pour rendre le processus de certification plus transparent et plus sûr

    Des chercheurs de Google revoient en profondeur les fondements de SSL Pour rendre le processus de certification plus transparent et plus sûr Des chercheurs de Google veulent remanier en profondeur les fondations des infrastructures de certifications SSL. En proposant une meilleure transparence, ils espèrent rendre le processus plus sûr et éviter de réitérer la déroute DigoNotar. Ben Laurie et Adam Langley proposent de combler une lacune fondamentale. Celle qui permet à plus de 600 autorités de délivrer ...

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  • Rocky Mountain Tech Trifecta v3.0

    - by Jeff Certain
    The Rocky Mountain Tech Trifecta is an annual event held in Denver in late February or early March. The last couple of these have been amazing events, with great speakers like Beth Massi, Scott Hanselman, David Yack, Kathleen Dollard, Ben Hoelting, Paul Nielsen… need I go on? Registration is open at http://www.rmtechtrifecta.com. The speaker list hasn’t been finalized, but it’s sure to be another great event. Don’t miss it!

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  • Important Features Of The Brother MFC 4300 Printer

    The Brother MFC 4300 printer is a 4-in-1 media center than can handle all an office will ever need. This unit was designed with the small business in mind in the respect of one piece of equipment tha... [Author: Ben Pate - Computers and Internet - March 25, 2010]

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  • How To Use a Free Website Builder

    Building websites are easy to do. Whether you use software or use the free download-able version, there are tutorials and tools to help you along the way. With free website builder, you have the ben... [Author: Scott Murray - Web Design and Development - May 23, 2010]

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  • Google I/O 2010 - A JIT Compiler for Android's Dalvik VM

    Google I/O 2010 - A JIT Compiler for Android's Dalvik VM Google I/O 2010 - A JIT Compiler for Android's Dalvik VM Android 301 Ben Cheng, Bill Buzbee In this session we will outline the design of a JIT Compiler suitable for embedded Android devices. Topics will include an architectural overview, the rationale for design decisions and the special support for JIT verification, testing and tuning. For all I/O 2010 sessions, please go to code.google.com From: GoogleDevelopers Views: 3 0 ratings Time: 01:00:14 More in Science & Technology

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  • Number of processes named 'doodle'

    - by Indian
    I have ben using 12.10 for a few days. Just upgraded it from 12.04. This comp of mine, which has a 4GB RAM and 64 bit intel processor, just goes slow randomly. When I press Ctrl+Alt+F6 and login through a command prompt, I see a number of processes using - ps -A I get many instances of a process named 'doodle' running. So many that I have to 'pkill' them by hand. Any idea why this is happening?

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  • Want To Know Of The Classic IBM InfoPrint Printer

    Things to know about the IBM InfoPrint 1601 printer begin with understanding what this monochrome laser printer has to offer. It is specifically designed to meet the needs of the small business and i... [Author: Ben Pate - Computers and Internet - March 31, 2010]

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  • Active Directory Snapshots with Windows Server 2008

    Snapshots are a useful feature of Windows Server 2008. Taking a snapshot of Active Directory as a scheduled task can prove to be a wise precaution in case disaster strikes. Once they are mounted, they can be accessed by any LDAP tool which allows the user to specify a host name and port number. Ben Lye shows how you can restore attributes to a large numbers of broken distribution groups from a snapshot.

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  • Great Functionalities Of Kindle Portable Reader

    Technology has never stopped enhancing people?s way of life as the years go by. It has significantly contributed a lot in the field of reading by converting the printed books into something that is c... [Author: Ben Dave - Computers and Internet - June 02, 2010]

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  • What program can I use to open .mld (recorded webcam) files?

    - by mike
    I am looking for a program to open video files with the extension .mld (This is a file from a video recording software I had a long time ago). Does anybody know any programs in Ubuntu that can open such files? Zoals de titel luidt: ik ben op zoek naar een programma dat videobestanden met de extensie .mld kan openen. Dit is een bestand van een wecbamrecorder die ik vroeger had op Windows. Alvast heel erg bedankt.

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  • So, You Thought YOU Owned Your Website?

    As part of being an SEO consultant, I?m frequently asked to conduct SEO Audits on potential client?s websites. Amongst sundry other tasks, I always check to see who the legal owner of the site is. Wi... [Author: Ben Kemp - Web Design and Development - April 20, 2010]

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  • What's the point of initializing a variable with the same value twice?

    - by JoeM05
    I was reading Ben Cherry's "JavaScript Module Pattern: In-Depth", and he had some example code that I didn't quite understand. Under the Cross-File Private State heading, there is some example code that has the following: var _private = my._private = my._private || {} This doesn't seem to be different from writing something like this: var _private = my._private || {} What's happening here and how are these two declarations different?

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  • "Oracle ?????????" Oracle Days Tokyo 2012 ?????

    - by OTN-J Master
    Normal 0 0 2 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-qformat:yes; mso-style-parent:""; mso-padding-alt:0mm 5.4pt 0mm 5.4pt; mso-para-margin:0mm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.5pt; mso-bidi-font-size:11.0pt; font-family:"Century","serif"; mso-ascii-font-family:Century; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"MS ??"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Century; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi; mso-font-kerning:1.0pt;} Normal 0 0 2 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-qformat:yes; mso-style-parent:""; mso-padding-alt:0mm 5.4pt 0mm 5.4pt; mso-para-margin:0mm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.5pt; mso-bidi-font-size:11.0pt; font-family:"Century","serif"; mso-ascii-font-family:Century; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"MS ??"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Century; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi; mso-font-kerning:1.0pt;} 10?30?(?)?31?(?)?2????Oracle Days Tokyo 2012?????????????????????Oracle Days ???????????????????????????????????????????????? ??????????????????IT???????????????(Simplified IT, Unleash Innovation)????IT????????????????????????????????????????????????????9/30??10/4???????????????Oracle OpenWorld 2012 ??????????????????????????????????????????????????????????????????? Normal 0 0 2 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-qformat:yes; mso-style-parent:""; mso-padding-alt:0mm 5.4pt 0mm 5.4pt; mso-para-margin:0mm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.5pt; mso-bidi-font-size:11.0pt; font-family:"Century","serif"; mso-ascii-font-family:Century; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"MS ??"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Century; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi; mso-font-kerning:1.0pt;} Oracle Days Tokyo 2012?????????????????????????????13?????60????????????????????????????????? ?1??:??????????????????? 1????????????????????????????????????????????·????????????????·??????????????????????????????????????????????????????????????????????????????????????????????????????? ????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????·????????????????????????????????????????????????????????????????????????????????????????????Exadata???????????????????????????????????? Normal 0 0 2 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-qformat:yes; mso-style-parent:""; mso-padding-alt:0mm 5.4pt 0mm 5.4pt; mso-para-margin:0mm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Century","serif";} ?2??:???????????·??????????????????????? 2????????????????????????????????????????????????????????????????????????????·??????????????·???????????????????Oracle Cloud???????? ??????????6????????????? ·????????:???????·?????????????????·????????????????·??????????3??????????????WebLogic Server 12?Oracle Fusion Middleware 11g?Oracle Exalogic?Oracle Event Processing?Oracle Coherence?Oracle Tuxedo ART 12c?Java??? ·????·???????:?????????·??????????????&????????2???????Oracle ?????????????????????????????????????????????? ·??????????:?????·??????????1?????13??????????????????????·??????????????????????????? Normal 0 0 2 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-qformat:yes; mso-style-parent:""; mso-padding-alt:0mm 5.4pt 0mm 5.4pt; mso-para-margin:0mm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Century","serif";} ¦??????????????????? ?????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? ¦???????????????? Oracle Days Tokyo 2012???????????????????????????????????????????????????????????????????????????????????????????????????????????? ???????????????????? ???????????????????

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  • Mobile Friendly Websites with CSS Media Queries

    - by dwahlin
    In a previous post the concept of CSS media queries was introduced and I discussed the fundamentals of how they can be used to target different screen sizes. I showed how they could be used to convert a 3-column wide page into a more vertical view of data that displays better on devices such as an iPhone:     In this post I'll provide an additional look at how CSS media queries can be used to mobile-enable a sample site called "Widget Masters" without having to change any server-side code or HTML code. The site that will be discussed is shown next:     This site has some of the standard items shown in most websites today including a title area, menu bar, and sections where data is displayed. Without including CSS media queries the site is readable but has to be zoomed out to see everything on a mobile device, cuts-off some of the menu items, and requires horizontal scrolling to get to additional content. The following image shows what the site looks like on an iPhone. While the site works on mobile devices it's definitely not optimized for mobile.     Let's take a look at how CSS media queries can be used to override existing styles in the site based on different screen widths. Adding CSS Media Queries into a Site The Widget Masters Website relies on standard CSS combined with HTML5 elements to provide the layout shown earlier. For example, to layout the menu bar shown at the top of the page the nav element is used as shown next. A standard div element could certainly be used as well if desired.   <nav> <ul class="clearfix"> <li><a href="#home">Home</a></li> <li><a href="#products">Products</a></li> <li><a href="#aboutus">About Us</a></li> <li><a href="#contactus">Contact Us</a></li> <li><a href="#store">Store</a></li> </ul> </nav>   This HTML is combined with the CSS shown next to add a CSS3 gradient, handle the horizontal orientation, and add some general hover effects.   nav { width: 100%; } nav ul { border-radius: 6px; height: 40px; width: 100%; margin: 0; padding: 0; background: rgb(125,126,125); /* Old browsers */ background: -moz-linear-gradient(top, rgba(125,126,125,1) 0%, rgba(14,14,14,1) 100%); /* FF3.6+ */ background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,rgba(125,126,125,1)), color-stop(100%,rgba(14,14,14,1))); /* Chrome,Safari4+ */ background: -webkit-linear-gradient(top, rgba(125,126,125,1) 0%, rgba(14,14,14,1) 100%); /* Chrome10+,Safari5.1+ */ background: -o-linear-gradient(top, rgba(125,126,125,1) 0%, rgba(14,14,14,1) 100%); /* Opera 11.10+ */ background: -ms-linear-gradient(top, rgba(125,126,125,1) 0%, rgba(14,14,14,1) 100%); /* IE10+ */ background: linear-gradient(top, rgba(125,126,125,1) 0%, rgba(14,14,14,1) 100%); /* W3C */ filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#7d7e7d', endColorstr='#0e0e0e',GradientType=0 ); /* IE6-9 */ } nav ul > li { list-style: none; float: left; margin: 0; padding: 0; } nav ul > li:first-child { margin-left: 8px; } nav ul > li > a { color: #ccc; text-decoration: none; line-height: 2.8em; font-size: 0.95em; font-weight: bold; padding: 8px 25px 7px 25px; font-family: Arial, Helvetica, sans-serif; } nav ul > li a:hover { background-color: rgba(0, 0, 0, 0.1); color: #fff; }   When mobile devices hit the site the layout of the menu items needs to be adjusted so that they're all visible without having to swipe left or right to get to them. This type of modification can be accomplished using CSS media queries by targeting specific screen sizes. To start, a media query can be added into the site's CSS file as shown next: @media screen and (max-width:320px) { /* CSS style overrides for this screen width go here */ } This media query targets screens that have a maximum width of 320 pixels. Additional types of queries can also be added – refer to my previous post for more details as well as resources that can be used to test media queries in different devices. In that post I emphasize (and I'll emphasize again) that CSS media queries only modify the overall layout and look and feel of a site. They don't optimize the site as far as the size of the images or content sent to the device which is important to keep in mind. To make the navigation menu more accessible on devices such as an iPhone or Android the CSS shown next can be used. This code changes the height of the menu from 40 pixels to 100%, takes off the li element floats, changes the line-height, and changes the margins.   @media screen and (max-width:320px) { nav ul { height: 100%; } nav ul > li { float: none; } nav ul > li a { line-height: 1.5em; } nav ul > li:first-child { margin-left: 0px; } /* Additional CSS overrides go here */ }   The following image shows an example of what the menu look like when run on a device with a width of 320 pixels:   Mobile devices with a maximum width of 480 pixels need different CSS styles applied since they have 160 additional pixels of width. This can be done by adding a new CSS media query into the stylesheet as shown next. Looking through the CSS you'll see that only a minimal override is added to adjust the padding of anchor tags since the menu fits by default in this screen width.   @media screen and (max-width: 480px) { nav ul > li > a { padding: 8px 10px 7px 10px; } }   Running the site on a device with 480 pixels results in the menu shown next being rendered. Notice that the space between the menu items is much smaller compared to what was shown when the main site loads in a standard browser.     In addition to modifying the menu, the 3 horizontal content sections shown earlier can be changed from a horizontal layout to a vertical layout so that they look good on a variety of smaller mobile devices and are easier to navigate by end users. The HTML5 article and section elements are used as containers for the 3 sections in the site as shown next:   <article class="clearfix"> <section id="info"> <header>Why Choose Us?</header> <br /> <img id="mainImage" src="Images/ArticleImage.png" title="Article Image" /> <p> Post emensos insuperabilis expeditionis eventus languentibus partium animis, quas periculorum varietas fregerat et laborum, nondum tubarum cessante clangore vel milite locato per stationes hibernas. </p> </section> <section id="products"> <header>Products</header> <br /> <img id="gearsImage" src="Images/Gears.png" title="Article Image" /> <p> <ul> <li>Widget 1</li> <li>Widget 2</li> <li>Widget 3</li> <li>Widget 4</li> <li>Widget 5</li> </ul> </p> </section> <section id="FAQ"> <header>FAQ</header> <br /> <img id="faqImage" src="Images/faq.png" title="Article Image" /> <p> <ul> <li>FAQ 1</li> <li>FAQ 2</li> <li>FAQ 3</li> <li>FAQ 4</li> <li>FAQ 5</li> </ul> </p> </section> </article>   To force the sections into a vertical layout for smaller mobile devices the CSS styles shown next can be added into the media queries targeting 320 pixel and 480 pixel widths. Styles to target the display size of the images in each section are also included. It's important to note that the original image is still being downloaded from the server and isn't being optimized in any way for the mobile device. It's certainly possible for the CSS to include URL information for a mobile-optimized image if desired. @media screen and (max-width:320px) { section { float: none; width: 97%; margin: 0px; padding: 5px; } #wrapper { padding: 5px; width: 96%; } #mainImage, #gearsImage, #faqImage { width: 100%; height: 100px; } } @media screen and (max-width: 480px) { section { float: none; width: 98%; margin: 0px 0px 10px 0px; padding: 5px; } article > section:last-child { margin-right: 0px; float: none; } #bottomSection { width: 99%; } #wrapper { padding: 5px; width: 96%; } #mainImage, #gearsImage, #faqImage { width: 100%; height: 100px; } }   The following images show the site rendered on an iPhone with the CSS media queries in place. Each of the sections now displays vertically making it much easier for the user to access them. Images inside of each section also scale appropriately to fit properly.     CSS media queries provide a great way to override default styles in a website and target devices with different resolutions. In this post you've seen how CSS media queries can be used to convert a standard browser-based site into a site that is more accessible to mobile users. Although much more can be done to optimize sites for mobile, CSS media queries provide a nice starting point if you don't have the time or resources to create mobile-specific versions of sites.

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