Yes, you should run upgradesstables on each node. If the sstable structure has
changed, you will need this completed before you can do streaming operations
like repairs or adding nodes.
As for running in parallel, that should be fine. It is a “within the node”
operation that pounds I/O (but is capped by compaction threshold). You need to
look at the level of activity from normal operations, though. If Cassandra is
running without much stress/sweat, go ahead and run 2 at once. (Conservatively,
that’s all I would do on 6 nodes.) If the cluster is inactive, let it fly on
all nodes.
Sean Durity
Lead Cassandra Admin, Big Data Team
From: Ola Nowak [mailto:ola.nowa...@gmail.com]
Sent: Thursday, August 13, 2015 5:30 AM
To: user@cassandra.apache.org
Subject: Can I run upgrade sstables on many nodes on one time
Hi all,
I'm trying to update my 6 node cluster from 2.0.11 to 2.1.8.
I'm following this update procedure:
http://docs.datastax.com/en/upgrade/doc/upgrade/cassandra/upgradeCassandraDetails.html
and the point 8 says: If you are upgrading from a major version (for example,
from Cassandra 1.2 to 2.0) or a major point release (for example, from
Cassandra 2.0 to 2.1), upgrade the SSTables on each node.
$ nodetool upgradesstables
As far as I understood it correctly I should run nodetool upgradesstables on
every node after upgrading the version on each node. Is that right?
As it is a really time consuming operation I wonder if I could run
upgradesstables on multiple nodes at one time ( parallelly)?
Regards,
Ola
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