Bug 1301332

Summary:	improve sparse file handling by supporting SEEK_HOLE / SEEK_DATA
Product:	[Retired] nfs-ganesha	Reporter:	Niels de Vos <ndevos>
Component:	FSAL_GLUSTER	Assignee:	Niels de Vos <ndevos>
Status:	CLOSED CURRENTRELEASE	QA Contact:
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	unspecified	CC:	jthottan, kkeithle, pasik
Target Milestone:	---	Keywords:	FutureFeature, Triaged
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	Enhancement
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-06-24 11:18:45 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1220173
Bug Blocks:

Description Niels de Vos 2016-01-24 10:20:24 UTC

Description of problem:
NFSv4 supports SEEK_HOLE and SEEK_DATA and this can improve the handling of sparse files (like virtual machine images) a lot. Gluster is going to support this soon too, see bug 1220173 for more details.

Steps to Reproduce:
1. create a sparse file on a NFSv4 mountpoint (use 'qemu-img')
2. copy the sparse file from the NFSv4 mount to somewhere (use 'cp')
3. compare the allocated space of the two files

Actual results:
The copy is fully allocated.

Expected results:
The copy should have holes as well.

Comment 1 Pasi Karkkainen 2018-08-31 13:57:11 UTC

Does nfs-ganesha support SEEK_HOLE / SEEK_DATA these days? 
Those features are part of NFSv4.2 protocol standard.

Comment 2 Jiffin 2018-09-05 03:39:45 UTC

The support was added in 2.7 branch(current devel branch) https://review.gerrithub.io/#/c/ffilz/nfs-ganesha/+/393642/. But not available in stable releases.

Comment 3 Pasi Karkkainen 2018-09-05 06:37:16 UTC

Great, thanks!

Comment 4 Kaleb KEITHLEY 2020-06-24 11:18:45 UTC

If this is still an issue please open an issue in the github tracker at https://github.com/nfs-ganesha/nfs-ganesha/issues