Re: block-level incremental backup - Mailing list pgsql-hackers

From Ibrar Ahmed
Subject Re: block-level incremental backup
Date
Msg-id CALtqXTeO_qVmZFdZ4sCMDeCED4289pj7tdfKhHWBVqkZhAGW4Q@mail.gmail.com
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In response to Re: block-level incremental backup  (Robert Haas <robertmhaas@gmail.com>)
Responses Re: block-level incremental backup
Re: block-level incremental backup
List pgsql-hackers


On Tue, Sep 3, 2019 at 6:00 PM Robert Haas <robertmhaas@gmail.com> wrote:
On Sat, Aug 31, 2019 at 3:41 PM Ibrar Ahmed <ibrar.ahmad@gmail.com> wrote:
> Are we using any tar library in pg_basebackup.c? We already have the capability
> in pg_basebackup to do that.

I think pg_basebackup is using homebrew code to generate tar files,
but I'm reluctant to do that for reading tar files.  For generating a
file, you can always emit the newest and "best" tar format, but for
reading a file, you probably want to be prepared for older or cruftier
variants.  Maybe not -- I'm not super-familiar with the tar on-disk
format.  But I think there must be a reason why tar libraries exist,
and I don't want to write a new one.
+1 using the library to tar. But I think reason not using tar library is TAR is
one of the most simple file format. What is the best/newest format of TAR?

--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company


--
Ibrar Ahmed

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