What would be the point of benchmarks? Benchmarks say pretty much nothing about distributed databases.
But you do want to know how such database behaves in general and during failures with some load and some data, say 100M records and 3 nodes. What kind of latency it has when nodes are added, replaced, moved etc. Including 90th percentile latency. How long does it take to move 1 TB worth of records, what if this process was interrupted, can it resume later or not. How does it deal with HDDs and bad sectors, especially wrt to performance, since disks like to retry bad sectors for a few seconds, completely blocking all I/O, requiring special handling. Or is it only suitable for SSDs.
But you do want to know how such database behaves in general and during failures with some load and some data, say 100M records and 3 nodes. What kind of latency it has when nodes are added, replaced, moved etc. Including 90th percentile latency. How long does it take to move 1 TB worth of records, what if this process was interrupted, can it resume later or not. How does it deal with HDDs and bad sectors, especially wrt to performance, since disks like to retry bad sectors for a few seconds, completely blocking all I/O, requiring special handling. Or is it only suitable for SSDs.