To address concerns with recovery from file system
failures, we consolidate the new and old log
files into a single file, introduce checksums to the
file, and record on-disk sstable state to permit
validation of the log file on restart. This permits
us to be pessimistic in the case of any failure,
leaving all affected files on disk.
patch by stefania; reviewed by benedict for CASSANDRA-7066
Stefania Alborghetti