I'm trying alternate metadata pool approach. I double checked that MDS servers 
are down and both original and recovery fs are set not joinable.


> On 27.09.2018, at 13:10, John Spray <[email protected]> wrote:
> 
> On Thu, Sep 27, 2018 at 11:03 AM Sergey Malinin <[email protected]> wrote:
>> 
>> Hello,
>> Does anybody have experience with using cephfs-data-scan tool?
>> Questions I have are how long would it take to scan extents on filesystem 
>> with 120M relatively small files? While running extents scan I noticed that 
>> number of objects in data pool is decreasing over the time. Is that normal?
> 
> The scan_extents operation does not do any deletions, so that is
> surprising.  Is it possible that you've accidentially left an MDS
> running?
> 
> John
> 
> John
> 
>> Thanks.
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