Can you please help me understand the difference between Cassandra UUID vs TimeUUID data type values ?
Many Thanks
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2maybe you can find it here : http://stackoverflow.com/questions/17945677/cassandra-uuid-vs-timeuuid-benefits-and-disadvantages – Zahra Aminolroaya Nov 29 '15 at 11:20
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thank you. It answered my question. – user3780030 Nov 29 '15 at 23:17
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The Cassandra Docs have an explanation of the difference between the two types.
The key difference is,
A value of the timeuuid type is a Type 1 UUID. A type 1 UUID includes the time of its generation and are sorted by timestamp...
It is easy to think of a UUID as a randomly generated unique key and a TIMEUUID as a randomly generated unique key with a timestamp embedded within making sorting possible.
Nathan
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The timeuuid cassandra type is a type 1 uuid, which is composed of a date-time, MAC address, and sequence number. If generated from the same location, they will be monotonically increasing, hence somewhat compressible when you compress many.
The uuid cassandra type is a type 4 uuid, which is just a huge random number. It is not monotonic or compressible.
Everything is detailed there https://en.wikipedia.org/wiki/Universally_unique_identifier
lacroix1547
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