sstableutil and sstabledump are your go-to tools for peering inside Cassandra’s SSTable files, the immutable data files that store your data on disk.
Let’s see sstableutil in action. Imagine you’re debugging a slow read for a specific partition. You’ve identified the SSTable file responsible, say nb-1-big-Data.db. You can use sstableutil to quickly scan it for that partition:
nodetool sstableutil nb-1-big-Data.db --scan-partition 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