Row iteration using RandomPartitioner

2012-04-02 Thread christopher-t.ng
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.
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Re: Row iteration using RandomPartitioner

2012-04-02 Thread Jake Luciani
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, christopher-t...@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.