Bug 1305795

Summary:	Set chattr +C /var/lib/libvirt/images during libvirt installation
Product:	[Community] Virtualization Tools	Reporter:	Peter Kotvan <pkotvan>
Component:	libvirt	Assignee:	Libvirt Maintainers <libvirt-maint>
Status:	CLOSED CURRENTRELEASE	QA Contact:	Virtualization Bugs <virt-bugs>
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	berrange, dyuan, jdenemar, libvirt-maint, mprivozn, mzhan
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Hardware:	Unspecified
OS:	Unspecified
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Fixed In Version:		Doc Type:	Bug Fix
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Last Closed:	2021-08-18 09:56:44 UTC	Type:	Bug
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Peter Kotvan 2016-02-09 09:25:19 UTC

Description of problem:
This is more of a suggestion. During the installation of libvirt the /var/lib/libvirt/images directory is created as a default place for virtual machines images. In case of installing on a system with COW filesystem such as btrfs or zfs one should disable copy-on-write on directories that will contain the images to avoid low IO performance.

This could be achieved by executing

chattr +C /var/lib/libvirt/images/

in postscript.

Comment 1 Daniel Berrangé 2021-08-18 09:56:44 UTC

Libvirt now makes storage pools nocow when on btrfs automatically