Keep in mind that in a distributed environment you probably have so much variance that nanosecond precision is pointless. Even google notes that in the paper, Dapper, a Large-Scale Distributed Systems Tracing Infrastructure [http://research.google.com/pubs/pub36356.html <http://research.google.com/pubs/pub36356.html>]
> On Oct 29, 2015, at 11:42 AM, DuyHai Doan <doanduy...@gmail.com> wrote: > > You can use TimeUUID data type and provide the value yourself from client > side. > > The Java driver offers an utility class com.datastax.driver.core.utils.UUIDs > and the method timeBased() to generate the TimeUUID. > > The precision is only guaranteed up to 100 nano seconds. So you can have > possibly 10k distincts values for 1 millsec. For your requirement of 20k per > sec, it should be enough. > > On Thu, Oct 29, 2015 at 12:10 PM, <chandrasekar....@wipro.com > <mailto:chandrasekar....@wipro.com>> wrote: > Hi, > > > > Oracle Timestamp data type supports fractional seconds (upto 9 digits, 6 is > default). What is the Cassandra equivalent data type for Oracle TimeStamp > nanosecond precision. > > > > This is required for determining the order of insertion of record where the > number of records inserted per sec is close to 20K. Is TIMEUUID an alternate > functionality which can determine the order of record insertion in Cassandra ? > > > > Regards, Chandra Sekar KR > > The information contained in this electronic message and any attachments to > this message are intended for the exclusive use of the addressee(s) and may > contain proprietary, confidential or privileged information. If you are not > the intended recipient, you should not disseminate, distribute or copy this > e-mail. Please notify the sender immediately and destroy all copies of this > message and any attachments. WARNING: Computer viruses can be transmitted via > email. The recipient should check this email and any attachments for the > presence of viruses. The company accepts no liability for any damage caused > by any virus transmitted by this email. www.wipro.com <http://www.wipro.com/>
