[HBASE-11339] HBase MOB

• Type: Umbrella
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.0.0
• Fix Version/s: hbase-11339, 2.0.0
• Component/s: regionserver, Scanners
• Hadoop Flags: Reviewed

Release Note

The Moderate Object Storage (MOB) feature (HBASE-11339[1]) is modified I/O and compaction path that allows individual moderately sized values (100KB-10MB) to be stored in a way that write amplification is reduced when compared to the normal I/O path. MOB is defined in the column family and it is almost isolated with other components, the features and performance cannot be effected in normal columns.

For more details on how to use the feature please consult the HBase Reference Guide

• Assignee: Jingcheng Du
• Reporter: Jingcheng Du
• Created: 13/Jun/14 03:30
• Updated: 17/Jun/22 05:53
• Resolved: 22/Jul/15 20:13

Description

It's quite useful to save the medium binary data like images, documents into Apache HBase. Unfortunately directly saving the binary MOB(medium object) to HBase leads to a worse performance since the frequent split and compaction.
In this design, the MOB data are stored in an more efficient way, which keeps a high write/read performance and guarantees the data consistency in Apache HBase.

Issue Links

• breaks: HBASE-12418 Multiple branches for MOB feature breaking git for case insensitive filesystems
• depends upon: HBASE-11591 Scanner fails to retrieve KV from bulk loaded file with highest sequence id than the cell's mvcc in a non-bulk loaded file
• relates to: HBASE-22749 Distributed MOB compactions