nosql « hbase « Java Database Q&A





1. What happens when HBase node fails?    stackoverflow.com

HBase is wonderful, but... What will happen to the data when a node (explodes/burns down/gets stolen/Torn into pieces by mad IT on the loose)?

  • Is the data lost?
  • Can the cluster ...

2. Scaling HBASE *down* instead of *up*    stackoverflow.com

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 ...

3. Learning open source technologies    stackoverflow.com

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 ...

4. Are RDBMS that bad as described in Hadoop: The definitive guide?    stackoverflow.com

I'm reading Hadoop: The definitive guide by Tom White. In chapter 13.6 "HBase vs RDMS" he said that if you have a lot of data, even simple queries like getting 10 ...

5. Returning aggregations from HBASE data    stackoverflow.com

I have an HBASE table of about 150k rows, each containing 3700 columns. I need to select multiple rows at a time, and aggregate the results back, something like: row[1][column1] + row[2][column1] ... ...

6. HBase Error - assignment of -ROOT- failure    stackoverflow.com

I've just installed hadoop and hbase from cloudera (3) but when I try to go to http://localhost:60010 it just sits there continually loading. I can get to the regionserver fine ...

7. Hbase Administrator    stackoverflow.com

Is there any straight forward GUI tool for exploring, viewing and querying hbase? I intend conditional queries for example items which have a specific value for a specific column. (A tool like ...

8. HBase hierarchical key scan    stackoverflow.com

I want to have hierarchical keys like: app:page:user:item = value (where : indicates concatenating with a delimiter). I understand that I can quickly find all the items that that user modified ...

9. Hbase data on Slaves    stackoverflow.com

If I use Hbase Cluster, does every slave have the same data or it could be partitioned? What are the best practices?