I have been attempting to add an image crud using postgresql to my php app. I use a local copy of mysql for the admin
databut wanted to use a remotely hosted copy of postgres for the images. After a lot of effort it is clear that the
imagecrud I am using doesn't support being hosted in a second database. Does anyone know of a php callable image crud
thatuses Postgresql?
On June 8, 2020, at 22:43, Peter <pmc@citylink.dinoex.sub.org> wrote:
Actually, the affair had some good side: as usual I was checking
my own designs first and looking for flaws, and indeed I found one:
If you do copy out the archive logs not directly to tape, but to
some disk area for further processing, then there is an issue with
possible loss. If you do it like the docs say, with a command like
this:
archive_command = 'test ! -f /mnt/server/archivedir/%f && cp %p
+/mnt/server/archivedir/%f' # Unix
That "cp" is usually not synchronous. So there is the possibility
that this command terminates successfully, and reports exitcode zero
back to the Postgres, and then the Postgres will consider that log
being safely away.
But the target of the copy may not yet been written to disk. If
at that point a power loss happens, the log may become missing/damaged/
incomplete, while the database may or may not consider it done
when restarting.
Therefore, mounting such a target filesystem in all-synchronous mode
might be a good idea. (UFS: "-o sync", ZFS: "set sync=always")
cheerio,
PMc
