Re: nodetool rebuild on non-empty nodes?

[Voytek Jarnot <vo...@gmail.com>]

Apologies for the bump, but I'm wondering if anyone has any thoughts on the
question below - specifically about running nodetool rebuild on a
destination that has data that does not exist in the source

Thanks.

On Wed, Sep 11, 2019 at 2:41 PM Voytek Jarnot <vo...@gmail.com>
wrote:

> Pardon the convoluted scenario, but we face some pretty ridiculous
> infrastructure restrictions.
>
> datacenter DC1: nodes containing many years of data written before
> 2019-09-01 (for example)
>
> datacenter DC2: nodes containing data written after 2019-09-01
>
> The idea is that these are independent clusters. We now connect them into
> a multi-DC cluster, and alter our keyspace to replicate to both DCs.
>
> What is the effect of running `nodetool rebuild -- DC1` on nodes in DC2? I
> know we'll get that historical DC1 data, but my concern is about the new
> data that had been written to the DC2 datacenter. Would the rebuild end up
> dropping our post 2019-09-01 data?
>
> Thanks,
> Voytek Jarnot
>