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________________________________
From: Cirillo Costantino <[email protected]>
To: Hugo Mills <[email protected]> 
Cc: ""[email protected]"" <[email protected]> 
Sent: Monday, December 9, 2013 1:05 PM
Subject: Re: Btrfs questions



thanks Hugo,

the link you sent indicates that has been "submitted" but it is not in a kernel 
release... does it mean it could be in a 3.14 or 15 release? 

with the release of Haswell from Intel, persistent memory will be possible and 
cheap... portions of this memory could be made visible as block devices and 
mirrored for protection to a neighboring system for later replay in the event 
of a crash or power outage; how are such feature request be included in btrfs?

lino


________________________________
From: Hugo Mills <[email protected]>
To: Cirillo Costantino <[email protected]> 
Cc: ""[email protected]"" <[email protected]> 
Sent: Monday, December 9, 2013 12:08 PM
Subject: Re: Btrfs questions


On Mon, Dec 09, 2013 at 12:02:02PM -0800, Cirillo Costantino wrote:
> 
> 
> i am looking at using btrfs for a new project and i have a few questions:
> 
>     * i have heard that as it currently stands Btrfs has some issues to be 
> used as a Lustre file system; is he aware of the issues and any plans to 
> address these and integrate Btrfs in to Lustre

   I don't recall seeing any Lustre-specific issues being reported
here. Do you have any links to bug reports with this configuration?

>     * any plans to support native clustering on Btrfs

   No: 
https://btrfs.wiki.kernel.org/index.php/FAQ#Will_Btrfs_become_a_clustered_file_system

>     * on ZFS the ZIL is a separate device, any plans to implement a
the B-Tree log on a separate device?

   Not that I'm aware of, but it may come out of the work below.

>     * any plans to allow to have a file system metadata be placed on a 
> separate device

https://btrfs.wiki.kernel.org/index.php/Project_ideas#Device_IO_Priorities

   ... but it's not being worked on right now.

   Hugo.

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