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4657d9e32c
The stream_mutation_fragments RPC handler did not check is_in_critical_disk_utilization_mode before accepting incoming mutation fragments. This meant load-and-stream (nodetool refresh --load-and-stream) could push data onto a node at critical disk utilization, potentially filling the disk completely. Add a critical disk utilization check in the get_next_mutation_fragment lambda, throwing critical_disk_utilization_exception when the node is in critical mode. This mirrors the existing protection in stream_blob.cc. Also remove the xfail marker from the corresponding test added in the previous commit.
Extension of the cluster tests, where all tests require externally mounted volumes to be used by scylla cluster nodes. The volumes are passed with --workdir.
The volumes can be of any size. A help generator space_limited_servers is provided
to easily create a cluster of any given number of nodes, where each node operates in
a separate volume.