HBase is the Hadoop database. Use it when you need random, realtime read/write access to your Big Data. This project's goal is the hosting of very large tables -- billions of rows X millions of columns -- atop clusters of commodity hardware.

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9
votes
2answers
57 views

Moving the SecondaryName Node in a Cloudera HBase Cluster

I deployed the secondary namenode on the same machine is my main namenode: This is wrong for performance and durability reasons (the secondary name node isn't a hot spare, but it does have a copy ...
6
votes
2answers
66 views

HBASE Space Used Started Climbing Rapidly

Update 4,215: After looking at space usage inside of hdfs, I see that .oldlogs is using a lot of space: 1485820612766 /hbase/.oldlogs So new questions: What is it? How do I clean it up? How ...
2
votes
1answer
46 views

Linux Network tuning to prevent tcp rcvpruned and backlogdrop?

My datanodes in my hbase cluster are triggering some tcp rcvpruned and backlog drops from time to time: It seems to be there are at least two angles to approach this at: Tune HBase/HDFS etc... so ...
0
votes
1answer
32 views

How to know which script or executable is linked with a metric in ganglia?

I have just started to explore ganglia and my question is "How to know which script or executable is linked with a metric in ganglia?" The fact is that I don't know much about ganglia. I have good ...
2
votes
2answers
336 views

Disable The Under Replicated Blocks Alert in Cloudera Manager

I have a single server Hbase cluster that I am only using as the sink end of HBase replication. Therefore I don't want to replicate any blocks within this cluster (since the source has replicated ...
1
vote
0answers
122 views

HBase issue with *some* regionservers connecting

I have an HBase cluster that is working, and I'm attempting to add some new servers to the cluster, but "SocketException: Invalid argument" and "FailedServerException: This server is in the failed ...
0
votes
0answers
70 views

hadoop hbase environment variables

I tried to setup a 4 node Hadoop cluster using CDH4.7. The cluster is up and running fine and when I submit a word count MR job it completed successfully but when I am submitting an MR job to insert ...
2
votes
0answers
59 views

Hbase block locality index is always 0

I have a Hbase (v 0.94.19 with Hadoop 1.2.1) setup with one master machine and two region servers. Each region server has 16 GB heap (6.4 GB cache, 4.0 GB memstore) and 1.6 TB (2 X 800 GB) SSD disk ...
2
votes
1answer
633 views

Could not start ZK at requested port of 2181, while export HBASE_MANAGES_ZK=false

Problem The first aim was to run HBase standalone. Navigating to ip:60010/master-status is succesfull once HBase has been started. The second aim is to run a distinct ZooKeeper quorum. ZooKeeper has ...
4
votes
1answer
111 views

Does Cloudera Manager need ongoing Root Access?

When installing Cloudera Manager 4, it asks for the root password on a passwordless sudo user to install packages. Does this account need to be retained, or is it just for initial setup?
2
votes
0answers
536 views

java.lang.NullPointerException When Doing A Read in HDFS

I have had a 10 node HBase cluster up and running for the past 4 months. The cluster was setup on VMs in a corporate environment which I do not control, but everything has been working great...until ...
0
votes
0answers
95 views

OpenTSDB Web interface showing nothing other than header and footer

NOTE: I moved the question from stackoverflow to serverfault as this question didn't attract attention. I have a temporary OpenTSDB and hbase hosted on a aws micro server. http://54.72.180.169:4242/ ...
1
vote
0answers
46 views

Hbase catalog tables custom location

I have a Hbase cluster running with 2 region servers, each hosting around 100 regions. I can see that the ROOT and META tables are automatically assigned to separate region servers. My system is read ...
1
vote
1answer
2k views

HBase: hbck can't fix region inconsistencies

We are using stock HBase 0.94.4 on Hadoop 1.0.4. One of HBase regions stuck in transition state and I got the following when I run /opt/hbase/bin/hbase hbck: ERROR: Region { meta => ...
0
votes
0answers
97 views

Cannot access data from hbase with amazone ec2

I have a single node Hadoop machine in which HBase is running in the Amazon EC2 instance. Due to some reason the server got restarted. So i need to start Hadoop and Hbase again. Then it's working ...
1
vote
1answer
242 views

Java process failure (hadoop, hbase)

Anytime I am running hadoop/hbase process from a command prompt I get an error: /usr/local/hadoop/bin/hadoop: line 320: /usr/lib/jvm/jdk1.7.0/bin/java: cannot execute binary file ...
3
votes
1answer
6k views

Can't connect to HDFS in pseudo-distributed mode

I followed the instructions here for installing hadoop in pseudo-distributed mode. However, I'm having trouble connecting to HDFS. When I execute this command : ./hadoop fs -ls / I get a ...
1
vote
1answer
342 views

What version of HDFS is compatible with HBase stable?

HBase stable is currently hbase-0.90.4, what version(s) of HDFS is it compatible with?
1
vote
1answer
183 views

scribe log analysis

I have decided to use scribe to log all the error and request details in my site for analysis. How can I use the scribe log data to analyze the data. Is there any tool for this or scribe server ...
-2
votes
3answers
993 views

why http://server:60010 web page for the running HBase Master

I installed by : wget http://archive.cloudera.com/cdh/3/hbase-0.90.3-cdh3u1.tar.gz This is my hbase_site.xml <property> <name>hbase.master</name> ...
4
votes
1answer
2k views

Is it possible to Managing 20 TB data using MySQL?

I am working in a project and my job is to build a database system to manage about 60,000,000,000 data entries. The project background is I have to do real-time storage for large number of messages ...
3
votes
6answers
667 views

How to achieve zero down time

For an application we want to achieve zero database and application down time using Active Active configuration. Our dB is Oracle Following are my questions: How can we achieve active active ...