Re: [MooseFS-Users] restoring from splitted trash

[Wolfgang <moo...@wo...>]

Hi Piotr Robert!

Thank you for your answer! Please find my response below:

On 2016-01-15 08:13, Piotr Robert Konopelko wrote:
> Hi Wolfgang,
>
>
>> On 15 Jan 2016, at 2:44 AM, Wolfgang <moo...@wo... 
>> <mailto:moo...@wo...>> wrote:
>>
>> Dear List!
>>
>> As I have recognized today according to Changelog on version 3.0.64-1 
>> the mounted /mnt/meta/trash/
>> folder is now splitted up into 4096 like "000", "001", ..., "FFE", FFF
>>
>> # MooseFS 3.0.64-1 (2015-12-21)
>>
>>   * (master+mount) split trash into 4096 separate sub-trashes
>>
>> I guess you had a reason to do this - but how am I supposed to 
>> undelete a complete folder including many files when this is spread 
>> up in thousand folders.
>>
> Yes, we had. The reason is problem with performing any operation on 
> trash when you have a big instance and a lot of files in trash (like 
> millions, tens of millions).
> When you have such amount of files in trash, any operation on it fails 
> because of e.g. timeouts during connection with master.
> Apart this, rm or even find is not able to operate on such a big 
> amount of files.
Yes I thought so that there are problems with lot of files in one 
directory - but whats the suggested way to undelete files/folders? (in 
big instances as well as in small instances)
Probably it would be nice to have a cli-tool which can list deleted 
files in the folder-structure as it was - and then undelete it from 
client. ?

Greetings
Wolfgang


>> Is there any mfs tool one can use for restoring?
>>
>> In the previous versions I had done a
>> mv *testfolder* undel/
>>
>> But now I should do a:
>> find /mnt/meta/trash/ -iname testfolder -exec mv {} ./undel/ \;
>> to restore each file but I think this would be error prune and ugly ;-)
>>
> Maybe we consider adding back whole trash as a directory, probably 
> hidden especially for small instances.
>
>> Thanks for any advise.
>>
>> Greetings
>> Wolfgang
>>
>
> Regards,
>
> -- 
> Piotr Robert Konopelko
> *MooseFS Technical Support Engineer* | moosefs.com <https://moosefs.com>
>