Goal: This article explains what does the command "enable_table_replication" do internally in Hbase replication by looking into th...

Symptom: Hbase master failed to start with error "java.io.IOException: Timedout 300000ms waiting for namespace table to be assigned&quo...

 Goal: This article records the common commands and issues for hbase replication.

Goal: How to modify hbase thrift client code if Hbase Thrift Service enables framed transportation and compact protocol. The background i...

Goal: How to install Thrift and run a sample Hbase thrift job towards Hbase Thrift Gateway on MapR Cluster. The example job is written in...

This article explains the behavior of MapRDB table auto-split algorithm. All tests below are done in MapR 4.0.1. Theory 1. auto split is...

1. Configure max row size. maprcli config save -values {"mfs.db.max.rowsize.kb":<value in KB>} maprcli config load -json | ...

This article shows a sample code to load data into Hbase or MapRDB(M7) using Scala on Spark. I will introduce 2 ways, one is normal load us...

This is just a memo for a sample java code to scan a hbase/M7 table. Source Code -- MaprHbaseTest.java import java.io.IOException; i...

Sometime if you want to create a large sample table in hbase to do some performance test, here is the way: 1. Create a table with pre-split...

Please read Apache HBase Region Splitting and Merging firstly. This is a quick explanation on the Hbase Region Split policy.

1. General Command Sample status Show cluster status summary. Below 2 are the same. hbase(main):002:0> status 3 servers, 0 dead, 1...

Below are good readings for HBase, FYI: 1. Bending time in HBase Explanation on HBase versions. 2. HBase "raw" scans 3. Scanni...

Hbase raw scan can see invisible(aka deleted) rows. "Version" decides how many versions of data can be showed for each *column* f...

Hbase table is using epoch time as TTL(Time to Live) in milliseconds. Here are 2 ways to convert it to readable time. For example: hbase...

Refer to Introduction to HBase Mean Time to Recovery (MTTR): In short: 1. Detecting node failures change hbase.zookeeper.timeout to 600...

How facebook designed the Hbase Schema for Analytic layer Watch live streaming video from facebookeducation at livestream.com ==

Below slides are good candidate as introduction to hbase. (Not written by me) Introduction to HBase from Avkash Chauhan HBase ...