Daran wrote: > > On Thu, Mar 06, 2003 at 08:12:31PM -0800, Chris Marble wrote: > > > Daran wrote: > > > > > > Whichever machine you choose for P-1, always give it absolutely as much > > > memory as you can without thrashing. There is an upper limit to how much it > > > will use, but this is probably in the gigabytes for exponents in even the > > > current DC range. > > > > So I should use the PIII with 1 3/4 GB of RAM to do nothing but P-1. > > This depends upon what it is you want to maximise. If it's your effective > contribution to the project, then yes.
I like my stats but I could certainly devote 1 machine out of 20 to this. Assume I've got 1GB of RAM. Do the higher B2s mean I should use a P4 rather than a P3 for this task? > Unfortunately, pure P-1 work is not supported by the Primenet server, so > requires a lot of ongoing administration by the user. > Alternatively, if the server is currently making > assignments in your desired range, then you could obtain them by setting > 'Always have this many days of work queued up' to 90 days - manual > communication to get some exponents - cut and past from worktodo.ini to a > worktodo.saved file - manual communication to get some more - cut and past - > etc. This is what I do. > > The result of this will be a worktodo.saved file with a lot of entries that > look like this > > DoubleCheck=8744819,64,0 > DoubleCheck=8774009,64,1 > ... > > (or 'Test=...' etc.) Now copy some of these back to your worktodo.ini file, > delete every entry ending in a 1 (These ones are already P-1 complete), > change 'DoubleCheck=' or 'Test=' into 'Pfactor=', and change the 0 at the > end to a 1 if the assignment was a 'DoubleCheck'. Would I unreserve all the exponents that are already P-1 complete? If I don't change the DoubleCheck into Pfactor then couldn't I just let the exponent run and then sometime after P-1 is done move the entry and the 2 tmp files over to another machine to finish it off? > If you're willing to do all this, then there's another optimisation you > might consider. Since it's only stage 2 that requires the memory, you could > devote your best machine(s) to this task, using your other boxes to feed > them by doing stage 1. That sounds like more work than I care to do. I can see having 1 machine do P-1 on lots of double-checks. > A couple of other points: You are limited in the CPU menu option to > 90% of physical memory, but this may be overridden by editing local.ini, > where you can set available memory to physical memory less 8MB. As an mprime user I edit the local.ini file all the time. Per your notes I upped *Memory to 466. -- [EMAIL PROTECTED] - HMC UNIX Systems Manager _________________________________________________________________________ Unsubscribe & list info -- http://www.ndatech.com/mersenne/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers
