On 08/28/2017 08:22 AM, Stephen Frost wrote:
> * Christoph Moench-Tegeder (cmt@burggraben.net) wrote:
>> ## Ron Johnson (ron.l.johnson@cox.net):
>>
>>> How is this done in v8.4? (I tried adding "date; rsync ..." but pg
>>> didn't like that *at all*.)
>> There's a DEBUG1-level log message on successful archive_command
>> completion - that would give you a lot of other low-prio log
>> messages wich you probably don't care about.
>> I'd put a wrapper around your rsync (a short shell script
>> would be sufficient) in the lines of rsync ... && logger "done",
>> that way you'd get the information via syslog.
>> On the other hand, do you really need the details about each WAL
>> segment? Since 9.4 there's pg_stat_wal_archiver... You're really
>> making your job harder than it needs to be with that ancient
>> PostgreSQL...
> Worse, such scripts run the serious risk of losing WAL if a crash
> happens because nothing is ensuring that the WAL has been sync'd to disk
> before returning from the archive_command.
>
> Most of the existing tools for dealing with WAL archival (pgbackrest,
> barman and WAL-E, at least) already log successful and unsuccessful
> archive command runs. I'm pretty sure barman supports back to 8.4 and I
> know pgbackrest does.
Thanks for the info on pgbackrest.
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