Understanding UUID v1
A time-based identifier that uses the current timestamp and the node's MAC address.
Key Benefits of UUID v1
- Guaranteed uniqueness across space and time
- Includes precise creation timestamp
- Ideal for legacy systems requiring time-based IDs
- Easy to extract generation time
Technical Details
UUID v1 is generated by concatenating the 60-bit timestamp, 14-bit clock sequence, and 48-bit node ID (MAC address). It follows the RFC 4122 standard.
Frequently Asked Questions
Statistically, yes. While not mathematically guaranteed to be unique across all time and space, the probability of generating two identical UUIDs is so small that it's practically impossible in any real-world scenario.
GUID (Globally Unique Identifier) is Microsoft's implementation of the UUID standard. For most practical purposes, they are identical and follow the same format.
Yes, especially v4 and v7, which are generated using cryptographically secure random numbers, making them suitable for session IDs and security-sensitive identifiers.