Re: CephFS object mapping.

[Robert LeBlanc <robert@xxxxxxxxxxxxx>]

On Fri, May 24, 2019 at 2:14 AM Burkhard Linke <Burkhard.Linke@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote:

Hi,

On 5/22/19 5:53 PM, Robert LeBlanc wrote:

When you say 'some' is it a fixed offset that the file data starts? Is the first stripe just metadata?

No, the first stripe contains the first 4 MB of a file by default,. The xattr and omap data are stored separately.

Ahh, so it must be in the XFS xattrs, that makes sense.

For future posterity, I combined a couple of your commands to remove the temporary intermediate file for others who may run across this.

rados -p <CephFS data pool> getxattr <CephFS Inode Number>.00000000 parent | ceph-dencoder type inode_backtrace_t import - decode dump_json 

----------------
Robert LeBlanc
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