[HDFS-4053] Increase the default block size

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.1.0-beta
• Hadoop Flags: Reviewed
• Release Note: The default blocks size prior to this change was 64MB. This jira changes the default block size to 128MB. To go back to previous behavior, please configure the in hdfs-site.xml, the configuration parameter "dfs.blocksize" to 67108864.
• Assignee: Eli Collins
• Reporter: Eli Collins
• Created: 15/Oct/12 18:55
• Updated: 27/Aug/13 22:07
• Resolved: 18/Oct/12 22:58

Description

The default HDFS block size (dfs.blocksize) has been 64mb forever. 128mb works well in practice on today's hardware configurations, most clusters I work with use it or higher (eg 256mb). Let's bump to 128mb in trunk for v3.