Bug 868120

Summary:	Metadata written to disk even if no changes occur.
Product:	[Community] Gluster-Swift	Reporter:	Peter Portante <pportant>
Component:	object-server	Assignee:	Nobody <nobody>
Status:	MODIFIED ---	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	0.1	CC:	bugs, perfbz, pportant
Target Milestone:	---
Target Release:	---
Hardware:	x86_64
OS:	Linux
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Fixed In Version:		Doc Type:	Bug Fix
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Last Closed:		Type:	Bug
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
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Embargoed:
Bug Depends On:
Bug Blocks:	903396, 978061

Description Peter Portante 2012-10-19 05:30:06 UTC

Description of problem:

  Today the code can write metadata to disk even if it has not been changed.

Version-Release number of selected component (if applicable):

  RHS 2.0

How reproducible:

  Readily

Steps to Reproduce:
1. Clear memcache, or use object_only=False config
2. Issue a Swift API GET on a container
3. Observe that the metadata is read then written even though it has not changed
  
Actual results:

  Metadata written to disk when it has not changed.

Expected results:

  Metadata is only written to disk when it has changed.

Additional info:

Comment 1 Peter Portante 2012-10-19 05:30:39 UTC

Working on changes for this one.

Comment 2 Vijay Bellur 2012-10-25 22:04:28 UTC

CHANGE: http://review.gluster.org/4111 (Further reduce extended attribute reads/writes) merged in master by Anand Avati (avati)

Comment 3 Vijay Bellur 2012-11-16 12:46:31 UTC

CHANGE: http://review.gluster.org/4173 (object-storage: only update metadata that changes) merged in master by Vijay Bellur (vbellur)