Re: pg_basebackup cannot compress to STDOUNT

On 5/8/2020 1:24 PM, Adrian Klaver wrote:
> On 5/8/20 12:31 PM, Support wrote:
>>
>> On 5/8/2020 12:18 PM, Adrian Klaver wrote:
>>> On 5/8/20 12:14 PM, Support wrote:
>>>> Hi,
>>>>
>>>> Despite of the --help saying that it's possible to gzip to STDOUT
>>>> and pipe it for another process
>>>> pg_basebackup fails saying that it's not possible to gzip to STDOUT.
>>>
>>> 1) Postgres version?
>>>
>>> 2) Command run?
>>>
>>> 3) Error reported?
>>>
>>>>
>>>> Who to believe then?
>>>>
>>>>
>> 1) Postgres version?
>> 12.2 selt compiled with
>> ./configure --with-perl --enable-integer-datetimes --enable-depend
>> --with-pam --with-systemd --enable-nls --with-libxslt --with-libxml
>> --with-llvm --with-python --with-icu --with-gssapi --with-openssl
>>
>> 2) Command run?
>> ssh postgres(at)nodeXXX "pg_basebackup -h /run/postgresql -Ft -D- | pigz
>> -c -p2 " | pigz -cd -p2 | tar -xf- -C /usr/local/pgsql/data
>>
>> 3) Error reported?
>> pg_basebackup: error: cannot stream write-ahead logs in tar mode to
>> stdout
>
> https://www.postgresql.org/docs/12/app-pgbasebackup.html
> "t
> tar
>
>     Write the output as tar files in the target directory. The main
> data directory will be written to a file named base.tar, and all other
> tablespaces will be named after the tablespace OID.
>
>     If the value - (dash) is specified as target directory, the tar
> contents will be written to standard output, suitable for piping to
> for example gzip. This is only possible if the cluster has no
> additional tablespaces and WAL streaming is not used.
>                 ^^^^^^^^^^^^^^^^^^^^^^^^^^
> "
>
> So use -X fetch or X none
>
>
>> Try "pg_basebackup --help" or more information.
>> tar: This does not look like a tar archive
>> tar: Exiting with failure status due to previous errors
>>
>> Thanks!
>>
>>

Good catch thank you!