Re: Streaming base backups

On Mon, Jan 17, 2011 at 11:32 AM, Tatsuo Ishii <ishii@postgresql.org> wrote:
>>> Good point. I have been always wondering why we can't use exiting WAL
>>> transporting infrastructure for sending/receiving WAL archive
>>> segments in streaming replication.
>>> If my memory serves, Fujii has already proposed such an idea but was
>>> rejected for some reason I don't understand.
>>
>> I must be confused, because you can use backup_command/restore_command
>> to transport WAL segments, in conjunction with streaming replication.
>
> Yes, but using restore_command is not terribly convenient. On
> Linux/UNIX systems you have to enable ssh access, which is extremely
> hard on Windows.

Agreed.

> IMO Streaming replication is not yet easy enough to set up for
> ordinary users. It is already proposed that making base backup easier
> and I think it's good. Why don't we go step beyond a little bit more?
>
>> What Fujii-san unsuccessfully proposed was to have the master restore
>> segments from the archive and stream them to clients, on request.  It
>> was deemed better to have the slave obtain them from the archive
>> directly.
>
> Did Fuji-san agreed on the conclusion?

No. If the conclusion is true, we would not need a streaming backup feature.

Regards,

--
Fujii Masao
NIPPON TELEGRAPH AND TELEPHONE CORPORATION
NTT Open Source Software Center