Hi Frank,
Am 10.10.24 um 11:13 schrieb Frank Schilder:
I would like to recommend to look at stretch-mode. There have been
discussions on this list about the reliability of 2-DC set-ups and
just using crush rules to distribute shards doesn't cut it. There
are corner cases that are only handled correctly by stretch mode if
the system needs to be up with a DC down. For example, it will make
sure that with min_size=2 an ACK is only sent to a client if each DC
has a shard. An ordinary crush rule will not do that.
Stretch mode only works for replicated pools.
Thanks for pointing out this one, I think Bills idea in point 2 goes
into the same direction. To avoid unneccessary network traffic, we
definitely need to consider stretch mode.
--
Andre Tann
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