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From Manoj Samel <manojsamelt...@gmail.com>
Subject Re: Applying delta between two HDFS snapshot using hdfs command
Date Mon, 14 Apr 2014 22:08:39 GMT
Thanks Jing,

The Jira is open since Nov 12 but seems a design doc was added just few
days back ...

Would you have any ETA on this ?

Thanks again !

Manoj


On Mon, Apr 14, 2014 at 2:47 PM, Jing Zhao <jing@hortonworks.com> wrote:

> Hi Manoj,
>
>     You're right, right now we do not have a complete snapshot
> rollback/restore functionality in HDFS. Thus users have to manually
> copy/delete files according to the snapshot diff report. There's an open
> jira HDFS-4167 for it. We plan to provide this support soon.
>
> Thanks,
> -Jing
>
>
> On Mon, Apr 14, 2014 at 2:14 PM, Manoj Samel <manojsameltech@gmail.com>wrote:
>
>> Hi,
>>
>> It seems the only restore from a HDFS snapshot using hdfs command line is
>> copy snapshot files to a target path.
>>
>> If the use cases are
>>
>>
>> 0. .... stuff ...
>>
>> 1. Take snapshot s_N
>>
>> 2. Add some files, delete other files
>>
>> 3. Take snapshot s_N+1
>>
>>
>> then copying s_N+1 to target just copies the newly added file to target,
>> it does not propagates the deletes between s_N and s_N+1.
>>
>> How does one apply the full delta between s_N and s_N+1 to target (and
>> not just additions) ? Is Using Java API the only option or is it possible
>> to use command line to do it ?
>>
>> Thanks,
>>
>
>
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