Re: block-level incremental backup

Hi Jeevan,

The idea is very nice.
When Insert/update/delete and truncate/drop happens at various
combinations, How the incremental backup handles the copying of the
blocks?


On Wed, Jul 17, 2019 at 8:12 PM Jeevan Chalke
<jeevan.chalke@enterprisedb.com> wrote:
>
>
>
> On Wed, Jul 17, 2019 at 7:38 PM Ibrar Ahmed <ibrar.ahmad@gmail.com> wrote:
>>
>>
>>
>> On Wed, Jul 17, 2019 at 6:43 PM Jeevan Chalke <jeevan.chalke@enterprisedb.com> wrote:
>>>
>>> On Wed, Jul 17, 2019 at 2:15 PM Ibrar Ahmed <ibrar.ahmad@gmail.com> wrote:
>>>>
>>>>
>>>> At what stage you will apply the WAL generated in between the START/STOP backup.
>>>
>>>
>>> In this design, we are not touching any WAL related code. The WAL files will
>>> get copied with each backup either full or incremental. And thus, the last
>>> incremental backup will have the final WAL files which will be copied as-is
>>> in the combined full-backup and they will get apply automatically if that
>>> the data directory is used to start the server.
>>
>>
>> Ok, so you keep all the WAL files since the first backup, right?
>
>
> The WAL files will anyway be copied while taking a backup (full or incremental),
> but only last incremental backup's WAL files are copied to the combined
> synthetic full backup.
>
>>>
>>>>
>>>> --
>>>> Ibrar Ahmed
>>>
>>>
>>> --
>>> Jeevan Chalke
>>> Technical Architect, Product Development
>>> EnterpriseDB Corporation
>>>
>>
>>
>> --
>> Ibrar Ahmed
>
>
>
> --
> Jeevan Chalke
> Technical Architect, Product Development
> EnterpriseDB Corporation
>


--
Regards,
vignesh
EnterpriseDB: http://www.enterprisedb.com