On Mon, May 30, 2016 at 10:57 AM, Alex Ignatov <a.ignatov@postgrespro.ru> wrote:
> Following this bug reports from redhat
> https://bugzilla.redhat.com/show_bug.cgi?id=845233
>
> it rising some dangerous issue:
>
> If on any reasons you data file is zeroed after some power loss(it is the
> most known issue on XFS in the past) when you do
> select count(*) from you_table you got zero if you table was in one
> 1GB(default) file or some other numbers !=count (*) from you_table before
> power loss
> No errors, nothing suspicious in logs. No any checksum errors. Nothing.
>
> Silent data loss is its pure form.
>
> And thanks to all gods that you notice it before backup recycling which
> contains good data.
> Keep in mind it while checking you "backups" in any forms (pg_dump or the
> more dangerous and short-spoken PITR file backup)
>
> You data is always in danger with "zeroed data file is normal file"
> paradigm.
That bug shows as having been fixed in 2012. Are there any modern,
supported distros that would still have it? It sounds really bad btw.
