c3d2f0cd81
this script provides a tool to decode a base36 encoded timeuuid to the underlying msb and lsb bits, and to encode msb and lsb to a string with base36. Both scylla and Cassandra 4.x support this new SSTable identifier used in SSTable names. like "nb-3fw2_0tj4_46w3k2cpidnirvjy7k-big-Data.db". Since this is a new way to print timeuuid, and unlike the representation defined by RFC4122, it is not straightforward to connect the the in-memory representation (0x6636ac00da8411ec9abaf56e1443def0) to its string representation of SSTable identifiers, like "3fw2_0tj4_46w3k2cpidnirvjy7k". It would be handy to have this tool to encode/decode the number/string for debugging purpose. For more context on the new SSTable identifier, please see https://cassandra.apache.org/_/blog/Apache-Cassandra-4.1-New-SSTable-Identifiers.html and https://issues.apache.org/jira/browse/CASSANDRA-17048 Signed-off-by: Kefu Chai <kefu.chai@scylladb.com> Closes #14374