What kind of damage have you had? Maybe it is worth trying to get MDS to start and backup valuable data instead of doing long running recovery?
Sounds like I get to have some fun tonight. inode linkage (i.e. folder hierarchy) and file names are stored in omap data of objects in metadata pool. You can write a script that would traverse through all the metadata pool to find out file names correspond to objects in data pool and fetch required files via 'rados get' command.
> On 6.11.2018, at 02:26, Sergey Malinin <hell@xxxxxxxxxxx> wrote:
>
> Yes, 'rados -h'.
>
>
>> On 6.11.2018, at 02:25, Rhian Resnick <xantho@xxxxxxxxxxxx> wrote:
>>
>> Does a tool exist to recover files from a cephfs data partition? We are rebuilding metadata but have a user who needs data asap.
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