Hi All I am new to Hbase and exploring the ways how to manage dimensional modeling using Hbase for data warehousing. The dimensions can be Date, Time, Categories, Products. Can anybody give example of implementation of Star schema in HBase? Regards Shuja ...
Hi All I have one question which can be best described by the following scenario. Suppose I have three tables BaseCategory,Category and products. If i am thinking in terms of RDBMS then the relationship amoung these tables are 1- One BaseCategory has Many categories 2- One Category has Many Products. Now i am thinking to convert it ...
I am trying to filter rows from a HBase table using two SingleColumnValueFilter objects to bring back all records that fall within a range of long values for the column. According to the documentation for the SingleColumnValueFilter, it does a lexicographic compare of the column value unless you pass it your own comparator. The api shows...
hey friend How to read/write data in Hbase using PHP? ...
Over vacation I read Pat Helland's "Life Beyond Transactions" (yes, vacation was that good :). To sum it up briefly, it advocates limiting the scope of transactions to a single entity and then using groups of "activities" that have the ability to update the entity or cancel a task anytime a change takes place that would make that task in...
What HBase ORM/adapters for Ruby exists? Which are the best? WHY? ...
Hi, I just wanted to know if there is a fundamental difference between hbase, cassandra, couchdb and monogodb ? In other words, are they all competing in the exact same market and trying to solve the exact same problems. Or they fit best in different scenarios? All this comes to the question, what should I chose when. Matter of taste? ...
I am working on a search engine design, which is to be run on cloud. We have just started, and have not much idea about Hdoop. Can anyone tell if HBase , MapReduce and HDFS can work on a single machine having Hdoop installed and running on it ? ...
Hi, What is the pros and cons of MongoDB (document-based), HBase (column-based) and Neo4j (objects graph)? I'm particularly interested to know some of the typical use cases for each one. http://stackoverflow.com/questions/703999/what-are-some-examples-of-problems-that-are-best-solved-with-graphs Maybe any Slideshare or Scribd...
Hey, If my data is relational (publishers-authors-books, associations-teams-players), can we use NoSQL system like HBase or MongoDB to store the data? (I know it may sound like a stupid question but I'm just learning :)) ...
I know that you can launch hbase in non-distributed mode. It's not clear from my reading whether it's practical to use it in production for a range from one node through a few up to a full-fledged cluster. The alternative would be to abstract out an interface and toss in something simpler in the small case(s). Has anyone out there experi...
I am running a little test/poc here. I need to load a few million rows every day into a database. And it's not log file data, I have comma delimited rows (of columns) which would exactly fit a relational database. After the loading, I need to allow a very fast search mechanism. Looking a bit at Google's implementation of bigtable and s...
Are there any similarities between these two? ...
Is there a way to rollback values to a previous stage at cell level (row level might work also) I imported a file with wrong data and I just need to go back to previous stage. ...
I'm getting this error message in my log file WARN hbase.HBaseConfiguration: instantiating HBaseConfiguration() is deprecated. Please use HBaseConfiguration#create() to construct a plain Configuration how can I get rid of this? My class extends Configured.class , and I'm instantiating configuration like this : HBaseConfiguration hBas...
I am good at coding in .NET and I build some my own websites when I am free. Also I want to start a small organization for software development. In recent days I have found so many open source technologies like NOSQL, HBase, MapReduce and other stuff that support to build scalable applications. Is it good to learn completely new techno...
Hello, We have a website developed in PHP with MySQL and sometimes facing problems when traffic increases. We have almost optimized the site in all ways to handle more requests but still facing problems at peak hours. One of my friends suggests to rebuild the site using HBase / MongoDB as back-end to improve the performance. Also he su...
I can tell hbase to disable and delete particular tables using: disable 'tablename' delete 'tablename' But I want to delete all the tables in the database without hardcoding the names of any of the tables. Is there a way to do this? I want to do this through the command-line utility ./hbase shell, not through Java or Thrift. ...