Support for ext4 as default filesystem for ephemeral disks

Registered by Davanum Srinivas (DIMS)

The ext3 filesystem does orders of magnitude more I/O than ext4 in
mkfs - a brief benchmark showed 14m to make a 1TB ext3 filesystem
vs 7 seconds to make a 1TB ext4 filesystem, with the ext3 filesystem
doing upwards of 6GB I/O.
Since ext4 has been a default in all major Linux distributions for
a long time now - RHEL5 has it as default, for instance - there is
no reason to default to ext3: users that need ext3 can configure
that themselves.

Blueprint information

Status:
Started
Approver:
None
Priority:
Undefined
Drafter:
Davanum Srinivas (DIMS)
Direction:
Needs approval
Assignee:
Davanum Srinivas (DIMS)
Definition:
New
Series goal:
None
Implementation:
Needs Code Review
Milestone target:
None
Started by
Davanum Srinivas (DIMS)

Related branches

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https://review.openstack.org/#/q/status:open+project:openstack/nova+branch:master+topic:bug/1266262,n,z

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Work Items

Work items:
Ephemeral file names should reflect fs type and mkfs command : INPROGRESS
Support for ext4 as default filesystem for ephemeral disks : INPROGRESS

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