CODEWITHSUNDEEP
cassandraupgradenodetool
Mostafa Jamareh
Mostafa Jamareh

Reputation: 1439

Upgrading Cassandra

my Cassandra version is 1.2.4 and i'm trying to upgrade it to 2.0.5 and i know that in the first part i have to upgrade it to 1.0.14 and after that try to upgrade it to the 2.0.5 ,

when I try to run nodetool -h localhost removenode Host ID it gives me :

Exception in thread "main" java.lang.UnsupportedOperationException: Cannot remove self at org.apache.cassandra.service.StorageService.removeNode(StorageService.java:3199) .....

before running that command i tried nodetool upgradesstables

what is the problem ? and how can i resolve it ?

OS:Ubuntu 12.04 lts

Upvotes: 0

Views: 622

Answers (1)

DmitryKanunnikoff
DmitryKanunnikoff

Reputation: 2266

UPDATE

  1. Download the versions 1.2.13 and 2.0.5 of Cassandra from the official site . Unpack . Configure cassandra.yaml in both versions downloaded Cassandra. Take as a basis the existing (old) version cassandra.yaml.
  2. Make snapshot for old Cassandra: nodetool snapshot.
  3. Stop recording unit (reading will continue to work): nodetool drain.
  4. Stop old Cassandra.
  5. Copy the data from the current (old) Cassandra in a new version 1.2.13. Run it (1.2.13).
  6. Perform for Cassandra 1.2.13 update command table format: nodetool upgradesstables-a.
  7. Copy data from Cassandra 1.2.13 to Cassandra 2.0.5.  

FINE POINTS

  1. In 2.0.5 are included by default virtual hosts - vnodes (record "num_tokens: 256" in cassandra.yaml).
  2. In 2.0.5 record "index_interval: 128" factored out of the file cassandra.yaml to the level properties of the table.
  3. In 2.0.5 some settings from previous versions of cassandra.yaml are absent.

Upvotes: 2

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