SCRU64: Sortable, Clock-based, Realm-specifically Unique identifier

SCRU64 ID offers compact, time-ordered unique identifiers generated by distributed nodes. SCRU64 has the following features:

• 63-bit non-negative integer storable as signed/unsigned 64-bit integer
• Sortable by generation time (as integer and as text)
• 12-digit case-insensitive textual representation (Base36)
• ~38-bit Unix epoch-based timestamp that ensures useful life until year 4261
• Variable-length node/machine ID and counter fields that share 24 bits

# pass node ID through environment variable
import os

os.environ["SCRU64_NODE_SPEC"] = "42/8"

import scru64

# generate a new identifier object
x = scru64.new_sync()
print(x)  # e.g., "0u2r85hm2pt3"
print(int(x))  # as a 64-bit unsigned integer


# generate a textual representation directly
print(scru64.new_string_sync())  # e.g., "0u2r85hm2pt4"

See SCRU64 Specification for details.

SCRU64's uniqueness is realm-specific, i.e., dependent on the centralized assignment of node ID to each generator. If you need decentralized, globally unique time-ordered identifiers, consider SCRU128.

License

Licensed under the Apache License, Version 2.0.