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
