RE: Regarding key/value interface

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I am not sure, if Rocksdb/LevelDB can work on a raw device. When I looked at code they were doing write to mount point/directory.

Varada

-----Original Message-----
From: ceph-devel-owner@xxxxxxxxxxxxxxx [mailto:ceph-devel-owner@xxxxxxxxxxxxxxx] On Behalf Of Haomai Wang
Sent: Friday, October 03, 2014 10:55 AM
To: Somnath Roy
Cc: Sage Weil (sweil@xxxxxxxxxx); ceph-devel
Subject: Re: Regarding key/value interface

Correctly, maybe we can move these super metadata to backend!

On Fri, Oct 3, 2014 at 6:47 AM, Somnath Roy <Somnath.Roy@xxxxxxxxxxx> wrote:
> Hi Sage/Haomai,
>
> I was going through the key/value store implementation and have one basic question regarding the way it is designed.
>
> I think key/value interface is assuming there will be a filesystem on top of the device . I saw in mount you are accessing files like superblock/fsid. So, for example, /var/lib/ceph/osd/ceph-0 should be a filesystem path, right ?
> If so, this may not be the case always as there are key/value stores which can work on the raw device. In that case, these files (superblock/fsid) also need to go in the key/value db.
>
> Let me know if I am missing anything.
>
> Thanks & Regards
> Somnath
>
>
>
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--
Best Regards,

Wheat
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