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We have two nodes. Node1 was down for a long time. During this time Node2 raised 1 TB capacity when Node1 has 100 GB.

We tried to repair Node1 with nodetool repair but nothing changed. After that we started nodetool repair in Node2, it took 5 days to compaction but nothing changed either.

Actual status here:

Datacenter: dc1
===============
Status=Up/Down

|/ State=Normal/Leaving/Joining/Moving
--  Address       Load       Tokens       Owns (effective)  Host ID    Rack

UN  172.x.y.z     149.46 GB  256          100.0%            xxx  rack1
UN  172.x.y.k     1.04 TB    256          100.0%            xyz  rack1

Nodes are in AWS. What should we do?

  • What replication factor are you using? – Christophe Schmitz Mar 28 '18 at 7:33
  • @ChristopheSchmitz cqlsh:5.0.1 cassandra: 3.0.9 CQL Spec: 3.4.0, Replication factor = 2 – Ekrem Gurdal Mar 28 '18 at 7:41
  • Are you doing any delete queries? Are you using TTL? – Christophe Schmitz Mar 28 '18 at 7:42
  • @ChristopheSchmitz We have never done delete queries yet and we are not using TTL. We only use store data and do some backward processing jobs. – Ekrem Gurdal Mar 28 '18 at 7:56
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We had a solution but don't know how it happened. Here what we did:

  • Took snapshot of both servers in case of data loss over AWS
  • We detached Volume where data is stored. (for instance 172.x.y.k)
  • We formatted instance and loaded Cassandra with new version. Then we attached Volume where data is stored.
  • Finally we started nodetool repair --full in terminal and it took 4 days.

Now our nodes are equal.

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