CODEWITHSUNDEEP
cassandraupgrade
Firdousi Farozan
Firdousi Farozan

Reputation: 882

Skipping "nodetool upgradesstables" for time series ttl expiry data in Cassandra upgrade from 2.1 to 3.11

In Cassandra 2.1 cluster, data format is ka and post upgrade to Cassandra 3.11, I see the new sstables are written in md format. For the time-series data that is going to be expired in 3 months time, can I skip running the nodetool upgradesstables?

I validated the data reads are working fine from the older ka format sstables after upgrade. The reason I want to skip the upgrade is from other threads, I know it is going to take a lot of time for format conversion and anyway this data is going to expire in 3 months.

Upvotes: 0

Views: 163

Answers (1)

Valentina
Valentina

Reputation: 534

I don't think it's mandatory to run nodetool sstablesupgrade, Cassandra 3 will be able to work with old SSTables, but you lose a lot of advantages of Cassandra 3 (for instance, space consumption is significantly reduced). Also Datastax has a warning in their upgrade documentation:

WARNING: Failure to upgrade SSTables when required results in a significant performance impact and increased disk usage and possible data loss. Upgrading is not complete until the SSTables are upgraded.

Upvotes: 1

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