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Subject: RE: Docs: Token Selection
Date: Fri, 17 Jun 2011 11:49:10 -0500
Message-ID: <05CEA178DD88EE4FA89EED77C245F8490FDF7EDA@msex85.morningstar.com>
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Thread-Topic: Docs: Token Selection
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From: "Jeremiah Jordan" <JEREMIAH.JORDAN@morningstar.com>
To: <user@cassandra.apache.org>

Run two Cassandra clusters...=20

-----Original Message-----
From: Eric tamme [mailto:etamme@gmail.com]=20
Sent: Friday, June 17, 2011 11:31 AM
To: user@cassandra.apache.org
Subject: Re: Docs: Token Selection

> What I don't like about NTS is I would have to have more replicas than =

> I need. =A0{DC1=3D2, DC2=3D2}, RF=3D4 would be the minimum. =A0If I =
felt that 2=20
> local replicas was insufficient, I'd have to move up to RF=3D6 which=20
> seems like a waste... I'm predicting data in the TB range so I'm=20
> trying to keep replicas to a minimum.
>
> My goal is to have 2-3 replicas in a local data center and 1 replica=20
> in another dc. =A0I think that would be enough barring a major=20
> catastrophe. =A0But, I'm not sure this is possible. =A0I define =
"local" as=20
> in the same data center as the client doing the insert/update.

Yes, not being able to configure the replication factor differently for =
each data center is a bit annoying.  Im assuming you basically want DC1 =
to have a replication factor of {DC1:2, DC2:1} and DC2 to have =
{DC1:1,DC2:2}.

I would very much like that feature as well, but I dont know the =
feasibility of it.

-Eric