Re: File removed while backup is running

Thanks Jan

I read your links and It solve the errors.

Regards.

Mario

2015-05-21 9:16 GMT+02:00 Jan Lentfer <Jan(dot)Lentfer(at)web(dot)de>:

> Hi,
>
> that is generally not a problem. _fsm is the "Free Space Map" file (
> http://www.postgresql.org/docs/9.4/static/storage-fsm.html) It's OK and
> normal, that files change or even disappear within PGDATA directory during
> backup - because the Postgres cluster is still operational. Those changes
> end up in the WAL files and that is why you need those from the start of
> the backup. This is also described in the manual:
>
> "Some file system backup tools emit warnings or errors if the files they
> are trying to copy change while the copy proceeds. When taking a base
> backup of an active database, this situation is normal and not an error.
> However, you need to ensure that you can distinguish complaints of this
> sort from real errors. For example, some versions of rsync return a
> separate exit code for "vanished source files", and you can write a driver
> script to accept this exit code as a non-error case. Also, some versions of
> GNU tar return an error code indistinguishable from a fatal error if a file
> was truncated while tar was copying it. Fortunately, GNU tar versions 1.16
> and later exit with 1 if a file was changed during the backup, and 2 for
> other errors. With GNU tar version 1.23 and later, you can use the warning
> options --warning=no-file-changed --warning=no-file-removed to hide the
> related warning messages."
>
>
> http://www.postgresql.org/docs/9.4/interactive/continuous-archiving.html#BACKUP-LOWLEVEL-BASE-BACKUP
>
>
> hth
>
> Jan
>
> Am 2015-05-21 09:04, schrieb Mario Aguado:
>
>> Hi,
>>
>> I have two postgres cluster in 9.4 version and all run backups
>> correctly. Recently I add a new cluster and the backup doesnt work on
>> it.
>>
>> All databases have archive_mode = on and wal_level=archive
>>
>> My backup has this steeps:
>>
>> SELECT pg_start_backup(${clustername});"
>> tar PGDATA and TABLESPACES
>> Select pg_stop_backup();
>> tar WAL files
>>
>> With this database when I run backup I get errors like:
>>
>> t3_28961_fsm: File removed before we read it
>>
>> I dont know what file type is t3_28961_fsm.
>>
>> If I go to tablespace dir i have several t files and this file types
>> are adding and removing continously.
>>
>> -rw------- 1 postgres postgres 8.0K May 21 09:01 t3_29094
>> -rw------- 1 postgres postgres 0 May 21 09:01 t3_29087
>> -rw------- 1 postgres postgres 8.0K May 21 09:01 t3_29093
>>
>> Im looking for this error but i didnt found any.
>>
>> Any idea?
>>
>> Thanks in advance.
>>
>> Regards.
>>
>> Mario
>>
>
>
>
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