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.
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
> On Feb 13, 2013, at 10:35 PM, Sri Ramya <[EMAIL PROTECTED]> wrote:
>> How to generate a unique row key for every event in flume- ng??
>> So that i can store data into cassandra.
>> Thank you