20061215, 00:42  #1 
Oct 2006
On a Suzuki Boulevard C90
F6_{16} Posts 
reservation sizing assistance
I apologize for all of the small reservations lately. I'm trying to keep everyone loaded without being too greedy. I have also been adding machines (another 10 CPUs today, for a current total of 114). If anyone has some advice on good sized ranges I should be taking to minimize the overhead that I put everyone through here are my specs:

20061215, 15:16  #2 
Dec 2004
13·23 Posts 
Sheep I don't think anyone ever has to apologize for reserving too much! Also the amount of work for scoring and managing the factors is not all that great. Takes quite a few minutes certainly but I'm sure your CPU time donation is well worth the personal time offset.
If you want my advice on range sizes... Sieve a range is not something that needs to be done quickly after a reservation is made. In addition if one reserves a large chunk and sits on it for a month or two it doesn't really hurt the project either, especially if it's inadvance of the current reservations and you actually do complete the range. So my advice would be, reserve about a months worth per CPU as one range, IMHO one month is actually a midsize reservation time wise. That would be about 1000G for either processor... speeds are not all that different probably take between 46 weeks. I don't think anyone would complain if you reserved something like... 530000577000 579000646000 That would give you 1000G per processor. Any other suggestions or comments from others??? 
20061215, 16:01  #3 
Sep 2006
11·17 Posts 
no suggestion, just a little hint:
in the SoB forum, http://www.freedc.org/forum/showthread.php?t=3501 there is a little MS Excel file, called "Sievecalc". This file helps you calculate your ranges: you just write your sieve speed, and it calculates, how much G you can do in one day, week and month. It also calculates, how long you will need for a specific range, so you dont have to do it on your own. 
20061215, 16:24  #4 
Oct 2006
On a Suzuki Boulevard C90
2·3·41 Posts 
VJS & Xentar,
Thanks! That is exactly the sort of guidance I was looking for. One last question/example: Say I know that on one set of boxes I want to sieve range AB and on the other I want to sieve range BC (such that AC is a contiguous range). These two ranges will not be completed at the same time, and are being done in different physical locations, and the results will be reported separately (ie. as factorsAB and factorsBC). What is the preferred way to do the reservations: as two reservations or as one lump AC reservation? Again, thanks in advance for your patience. P.S. Of course, one option is for you to say "Shut up with your stupid questions and go away, you're too much trouble." 
20061215, 16:33  #5  
Aug 2002
1000001101_{2} Posts 
Quote:
I'm sure that 200000204000 was reserved way in advance of the then current reservations. Now it is far in the rear of completed ranges. This tends to cause problems for the project administration. 

20061215, 16:55  #6  
Aug 2002
3·5^{2}·7 Posts 
Quote:


20061215, 17:06  #7 
Apr 2003
2^{2}×193 Posts 
I agree with Joe's suggestions about reservations for BlisteringSheep.
But from my feeling 34 weeks would still work. I reserve normally for 4 weeks. Lars 
20061216, 14:20  #8 
2^{2}×3^{2}×103 Posts 
Just to make sure I follow everyone  the Sieve test should not run more than 1 month or else it causes problems (unnecessary work)?

20061216, 16:22  #9 
Jun 2005
373 Posts 
...or else it is succeptible to cause unneccessary work. The thing is that it should be finished before it arrives at the bottom of the reservation list and gets stuck there all alone for a long time. If everybody takes the reservations below some reasonable limit(one month), this will not happen. H.
Last fiddled with by hhh on 20061216 at 16:27 
Thread Tools  
Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
Using long long's in Mingw with 32bit Windows XP  grandpascorpion  Programming  7  20091004 12:13 
Sieve Reservation Archive thread  axn  Sierpinski/Riesel Base 5  13  20080727 02:15 
Sieve reservation  hhh  Prime Cullen Prime  5  20070803 04:37 
Sieve reservation history  hhh  Prime Cullen Prime  0  20070324 15:17 
Sieve reservation discussions  jmblazek  Twin Prime Search  27  20070131 21:41 