hbase-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Mark <static.void....@gmail.com>
Subject Re: Reverse timestamp
Date Sat, 20 Aug 2011 13:29:05 GMT
Thanks but I was more referring to reverse ordered timestamps for 
composite keys to be used for sorting purposes.

On 8/19/11 10:26 PM, lars hofhansl wrote:
> HBase maps (row-key, column family name, column, timestamp) to a value.
>
> The KeyValues are also sorted by the same attributes in reverse timestamp order.
>
> The default timestamp is the current time, but you can set any long value (which does
not need correlate in any way to the time domain)
> as the time stamp and hence define your own ordering within multiple version of the same
row key.
>
> See Put: Put(byte[] row, long ts).
>
> Is that what you meant?
>
> -- Lars
>
>
>
> ________________________________
> From: Mark<static.void.dev@gmail.com>
> To: user@hbase.apache.org
> Sent: Friday, August 19, 2011 6:39 PM
> Subject: Reverse timestamp
>
> I understand the need but I don't understand how to generate a reverse timestamp. Can
someone please explain how this is accomplished and how I can test that its working correctly?
>
> Thanks

Mime
View raw message