Re: Could rados pool support tree view feature ?

[Jeff Wu <cpwu@tnsoft.com.cn>]

Hi ,Tommi
Thank you very much.

00011 and 00012 are sub-pools ,we want to map our iaas devices topology
view meta data to these these sub-pools as a reference model. 

On Tue, 2011-12-20 at 01:16 +0800, Tommi Virtanen wrote:
> On Sun, Dec 18, 2011 at 22:51, Jeff Wu <cpwu@tnsoft.com.cn> wrote:
> > Could rados pool support tree view feature ?for instance :
> >
> > $rados lspools -m 172.16.10.10
> > data
> > metadata
> > rbd
> > Product:00000001
> > ├── 00011
> > │   └── 00012
> > |        └── 00013
> 
> What type are the 00011 and 00012 entries? Are they pools or objects,
> or what? RADOS pools are flat namespaces of objects, there's no tree
> structure there.
> 
> You should be able to write that easily, for example less than 100
> lines of Python using the "rados" module gets you the listing of the
> pools and the objects in them, and then you can use whatever your
> custom logic is for creating that tree shape.
> 
> The Ceph team pretty much starts with the assumption that your pools
> are going to have at least millions of objects, so it's unlikely we'll
> write pretty visual navigation apps listing individual objects. The
> output would just be too long to be useful.

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