How to run sqoop jobs from Oozie Sqoop is a tool to import/export data from a relaional database to HDFS and vice-versa. It is super-easy to use and uses Map-reduce jobs behind the scenes to move data from source to destination. On the other hand, Oozie is a job-scheduler for Apache hadoop jobs (Just like…
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How to set up Sqoop incremental imports? Here’s a step by step guide for Sqoop incremental imports and since it says step-by-step, it’s going to be only that 😉 . Hive, a data warehousing tool is a solution to your problems with data access while your data is distributed in flat files. Since these are…
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Illegal partition exception in sqoop for incremental imports Sqoop is an amazing tool by apache that is widely used to import/export data between Hadoop and relational databases. I have particularly used this for developing a data-warehouse wherein I was pulling in data in the data-warehouse from a variety of relational databases. On top of that…
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Horton-works data platform abbreviated as HDP is a completely open source distribution of Hadoop. As much as a breeze it is to provision, manage and monitor clusters each with multiple nodes through Ambari, It’s a pain in a*s as soon as any of the component installations through ambari go awry (which isn’t so uncommon actually)…
Continue readingHow to run sqoop job through oozie successfully Sqoop jobs are used to create and save the import and export commands. It helps to automate the sqoop tasks and in re-execution of sqoop actions. I mostly find myself writing sqoop jobs when I need to write incremental-imports in Sqoop and to schedule and automate the…
Continue readingWhat is the difference between javascript variables with var and without var keyword In javascript, we see two ways to declare a variable: One is with var keyword
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var sampleVar = 100; var sampleFunc= function(){ var sampleVariableInFunc = 200; } |
Other way is without var keyword
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anotherSampleVar = 100; var anotherSampleFunc = function(){ var dummyVariable; sampleVariableInFunc = 200; dummyVariable = 20; } |
Let’s try to find out the difference between the javascript variables with var and without var keywords: Talking of…
Continue readingHoisting in JavaScript Explained As a matter of fact it is, javascript is an interpreted language and the javascript interpreter performs a lot of mystical stuff behind the scenes. Hoisting in JavaScript is certainly one of them. A quick Google search shows, the term means to raise or haul up. Something like this: Think of…
Continue readingHow to use a footer with ion tabs in Ionic ion-tabs in Ionic is a very neat way for navigation among different screens indeed. However, using them could be a bit tricky sometimes. Infact, sometime back, I wrote an article explaining how to call a function when a tab is selected since ion-tabs often do…
Continue readingWhile using ion-tabs which is a part of Ionic frameowork, I tried to use ion-tab with ng-click to call a function on click in ion-tabs. Here is what the code looked like:
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<ion-tabs class="tabs-striped tabs-top tabs-background-stable tabs-color-light tabs-fullwidth"> <!---Home Tab----> <ion-tab title="Home" ng-click="getDataForHome()" href="#/tab/home" > <ion-nav-view></ion-nav-view> </ion-tab> <!---Content Tab--> <ion-tab title="Content" ng-click="getContent()" href="#/tab/content"> <ion-nav-view></ion-nav-view> </ion-tab> </ion-tabs> |
Here’s an Ionic play demo for the same code: Demo1 As you may have experienced in above demo,tabs are not changing. Guessed…
Continue readingHere is Why use track by Using ng-options is better than using ng-repeat in select for so many reasons, major being ng-options does not create a new $scope for every option and thus improves performance when you have a long list of options to be populated in a select box. You can read more about…
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