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Date: Wed, 9 Dec 2015 13:26:24 -0800
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 <CAJOO_ROCFBFGq0ytVcNGPYO38Op4npgZ7H8PFoB7m4OYgxwK+A@mail.gmail.com>
Subject: Switching to Vnodes
From: cass savy <casssavy@gmail.com>
To: user@cassandra.apache.org
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We want to move our clusters to use Vnodes. I know the docs online say we
have to create new DC with vnodes and move to new dC and decommission old
one. We use DSE for our c* clusters.C* version is 2.0.14

1. Is there any other way to migrate existing nodes to vnodes?
2. What are the known issues with that approach?
3. We have few secondary indexes in the keyspace, will that cause any
issues with moving to vnodes?

4. What are the issues encountered after moving to vnodes in PROD
5. anybody recommend Vnodes for Spark nodes.

*Approach : Moving to new DC with vnodes enabled*:
When I tested it for  a  keyspace which has secondary indexes, rebuilds on
Vnode enabled Datacenter takes days and don't know when it completes or
even if it will complete. I tried with 256,32,64 tokens per node but no
luck.

Please advise.

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<div dir=3D"ltr">We want to move our clusters to use Vnodes. I know the doc=
s online say we have to create new DC with vnodes and move to new dC and de=
commission old one. We use DSE for our c* clusters.C* version is 2.0.14<div=
><br></div><div>1. Is there any other way to migrate existing nodes to vnod=
es?</div><div>2. What are the known issues with that approach?</div><div>3.=
 We have few secondary indexes in the keyspace, will that cause any issues =
with moving to vnodes?</div><div><br></div><div>4. What are the issues enco=
untered after moving to vnodes in PROD</div><div>5. anybody recommend Vnode=
s for Spark nodes.</div><div><br></div><div><b>Approach : Moving to new DC =
with vnodes enabled</b>:</div><div>When I tested it for =C2=A0a =C2=A0keysp=
ace which has secondary indexes, rebuilds on Vnode enabled Datacenter takes=
 days and don&#39;t know when it completes or even if it will complete. I t=
ried with 256,32,64 tokens per node but no luck.=C2=A0</div><div><br></div>=
<div>Please advise.</div><div><br></div><div>=C2=A0</div></div>

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