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From Voytek Jarnot <>
Subject Re: nodetool rebuild on non-empty nodes?
Date Wed, 16 Oct 2019 19:38:28 GMT
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


On Wed, Sep 11, 2019 at 2:41 PM Voytek Jarnot <>

> 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

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