HBase Architecture 101 - Write-ahead-Log

What is the Write-ahead-Log you ask? In my previous post we had a look at the general storage architecture of HBase. One thing that was mentioned is the Write-ahead-Log, or WAL. This post explains how the log works in detail, but bear in mind that it describes the current version, which is 0.20.3. I will address the various plans to improve the log for 0.21 at the end of this article. For the term

[yuiseki]

Write Ahead Logging

[sessan]

hbase　write ahead logの記事