Twitter had opensourced snowflake back in 2010
https://github.com/twitter/snowflake
The repo hasn't been updated in a while, but I do see a fork, which
has been fairly actively developed.
https://github.com/dgkim84/snowflake

On Thu, Feb 14, 2013 at 8:45 AM, Ralph Goers <[EMAIL PROTECTED]> wrote:
> Only on a single machine with a single cpu. Multiple machines could still generate the same value. Multiple threads on the same machine could generate the same value.
>
> The uuid log4j 2 uses accounts for this. The Cassandra FAQ wiki page discusses using a uuid but the project it references is unfortunately not thread safe - at least the last I checked.
>
> Ralph
>
> On Feb 14, 2013, at 5:11 AM, Madhu Gmail <[EMAIL PROTECTED]> wrote:
>
>> you can use time stamp along with nano seconds  which would give unique row key.
>>
>> Madhu  Munagala
>> (214)679-2872
>>
>> On Feb 13, 2013, at 10:35 PM, Sri Ramya <[EMAIL PROTECTED]> wrote:
>>
>>> hi,
>>>
>>> How to generate a unique row key for every event in flume- ng??
>>> So that i can store data into cassandra.
>>>
>>> Thank you