Row iteration using RandomPartitioner

[ch...@ubs.com]

Hi,

Bit of a silly question, is row iteration using the RandomPartitioner
deterministic?  I don't particularly care what the order is relative to
the row keys (obviously there isn't one, it's the RandomPartitioner),
but if I run a full iteration over all rows in a CF twice, assuming no
underlying changes to the CF in the meantime, will the rows be returned
in the same order both times?

I assume so, as I don't see how one could use get_range_slices to do
this otherwise, but I wanted to check.

Re: Row iteration using RandomPartitioner

[Jake Luciani <ja...@gmail.com>]

Correct. Random partitioner order is md5 token order. If you make no changes you will get the same order

 

On Apr 2, 2012, at 7:53 AM, <ch...@ubs.com> wrote:

> Hi,
> 
> Bit of a silly question, is row iteration using the RandomPartitioner deterministic?  I don't particularly care what the order is relative to the row keys (obviously there isn't one, it's the RandomPartitioner), but if I run a full iteration over all rows in a CF twice, assuming no underlying changes to the CF in the meantime, will the rows be returned in the same order both times?
> 
> I assume so, as I don’t see how one could use get_range_slices to do this otherwise, but I wanted to check.
> 
> Visit our website at http://www.ubs.com 
> 
> This message contains confidential information and is intended only 
> for the individual named. If you are not the named addressee you 
> should not disseminate, distribute or copy this e-mail. Please 
> notify the sender immediately by e-mail if you have received this 
> e-mail by mistake and delete this e-mail from your system. 
> 
> E-mails are not encrypted and cannot be guaranteed to be secure or 
> error-free as information could be intercepted, corrupted, lost, 
> destroyed, arrive late or incomplete, or contain viruses. The sender 
> therefore does not accept liability for any errors or omissions in the 
> contents of this message which arise as a result of e-mail transmission. 
> If verification is required please request a hard-copy version. This 
> message is provided for informational purposes and should not be 
> construed as a solicitation or offer to buy or sell any securities 
> or related financial instruments. 
> 
> UBS Limited is a company limited by shares incorporated in the United 
> Kingdom registered in England and Wales with number 2035362. 
> Registered office: 1 Finsbury Avenue, London EC2M 2PP.  UBS Limited 
> is authorised and regulated by the Financial Services Authority. 
> 
> UBS AG is a public company incorporated with limited liability in 
> Switzerland domiciled in the Canton of Basel-City and the Canton of 
> Zurich respectively registered at the Commercial Registry offices in 
> those Cantons with Identification No: CH-270.3.004.646-4 and having 
> respective head offices at Aeschenvorstadt 1, 4051 Basel and 
> Bahnhofstrasse 45, 8001 Zurich, Switzerland.  Registered in the 
> United Kingdom as a foreign company with No: FC021146 and having a 
> UK Establishment registered at Companies House, Cardiff, with No:  
> BR 004507.  The principal office of UK Establishment: 1 Finsbury Avenue, 
> London EC2M 2PP.  In the United Kingdom, UBS AG is authorised and 
> regulated by the Financial Services Authority.
> 
> UBS reserves the right to retain all messages. Messages are protected 
> and accessed only in legally justified cases.