that this could be improved since there might be requirements
from other users that cannot be covered with the proposed procedure.
BR
MK
From: Alain Rodriguez
Sent: April 22, 2024 18:27
To: user@cassandra.apache.org
Cc: Michalis Kotsiouros (EXT)
Subject: Re: Datacenter decommissioning on Cassandra 4.1.4
the default consistency level for
authentication/authorization to LOCAL_ONE as it used in previous C*
versions.
BR
MK
-Original Message-
From: Sebastian Marsching
Sent: April 22, 2024 21:58
To: Michalis Kotsiouros (EXT) via user
Subject: Re: Datacenter decommissioning on Cassandra 4.1.4
Recently, I successfully used the following procedure when decommissioning a
datacenter:
1. Reduced the replication factor for this DC to zero for all keyspaces except
the system_auth keyspace. For that keyspace, I reduced the RF to one.
2. Decommissioned all nodes except one in the DC using
datacenter being removed.
>5. Change system_auth keyspace so they no longer reference the
>datacenter being removed.
>
> BR
>
> MK
>
>
>
>
>
>
>
> *From:* Jeff Jirsa
> *Sent:* April 08, 2024 17:19
> *To:* cassandra
> *Cc:* Michalis K
system_auth keyspace so they no longer reference the datacenter
being removed.
BR
MK
From: Jeff Jirsa
Sent: April 08, 2024 17:19
To: cassandra
Cc: Michalis Kotsiouros (EXT)
Subject: Re: Datacenter decommissioning on Cassandra 4.1.4
To Jon’s point, if you remove from replication after step 1
To Jon’s point, if you remove from replication after step 1 or step 2 (probably
step 2 if your goal is to be strictly correct), the nodetool decommission phase
becomes almost a no-op.
If you use the order below, the last nodes to decommission will cause those
surviving machines to run out of
You shouldn’t decom an entire DC before removing it from replication.
—
Jon Haddad
Rustyrazorblade Consulting
rustyrazorblade.com
On Mon, Apr 8, 2024 at 6:26 AM Michalis Kotsiouros (EXT) via user <
user@cassandra.apache.org> wrote:
> Hello community,
>
> In our deployments, we usually rebuild
Hello community,
In our deployments, we usually rebuild the Cassandra datacenters for
maintenance or recovery operations.
The procedure used since the days of Cassandra 3.x was the one documented in
datastax documentation. Decommissioning a datacenter | Apache Cassandra 3.x
