[HDFS-8563] Erasure Coding: fsck handles file smaller than a full stripe

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: HDFS-7285
• Hadoop Flags: Reviewed
• Assignee: Walter Su
• Reporter: Walter Su
• Created: 09/Jun/15 06:06
• Updated: 30/Sep/15 19:38
• Resolved: 09/Jul/15 17:57

Description

Uploaded a small file. Fsck shows it's UNRECOVERABLE. It's not correct.

Erasure Coded Block Groups:
 Total size:    1366 B
 Total files:   1
 Total block groups (validated):        1 (avg. block group size 1366 B)
  ********************************
  UNRECOVERABLE BLOCK GROUPS:   1 (100.0 %)
  MIN REQUIRED EC BLOCK:        6
  ********************************
 Minimally erasure-coded block groups:  0 (0.0 %)
 Over-erasure-coded block groups:       0 (0.0 %)
 Under-erasure-coded block groups:      1 (100.0 %)
 Unsatisfactory placement block groups:         0 (0.0 %)
 Default schema:        RS-6-3
 Average block group size:      4.0
 Missing block groups:          0
 Corrupt block groups:          0
 Missing ec-blocks:             5 (55.555557 %)

Issue Links

• relates to: HDFS-8731 Erasure coding: For a small file missing and under replicated ec-block calculation is incorrect