Re: How long can a cluster member be down before it becomes dangerous?

It depends on how long. If you have any dbs with low settings for
replication cutoff, then you'd want to be super careful. But I probably
would look at rebuilding the down server from the up one if it's more than
2 or 3 weeks...

On Wed, Jan 6, 2021, 2:16 PM Rob Berendt <[email protected]> wrote:

> I remember reading somewhere that if a cluster member is down for an
> extended time, such as a week or so, that bringing it back online can be
> dangerous.  Meaning something like this:
> ServerA is in a cluster with ServerB.
> ServerA is dropped for an extended period of time.
> Databases on ServerB get new records, etc.
>
> Since ServerA was down so long if you bring it back up resyncing it may
> actually drop the new rows or some such thing.  It's all a little foggy to
> me exactly what the concern was.  Maybe it was deletions in ServerB would
> get replicated back in from ServerA.  This seems more likely.
>
> I tried a google search but apparently I'm not getting the right
> terminology to find a related hit.
>
> Rob Berendt
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