Author: James T. Walker
Date: 23:05:16 11/28/02
Go up one level in this thread
On November 28, 2002 at 19:27:19, Jeremiah Penery wrote: >On November 28, 2002 at 17:11:08, James T. Walker wrote: > >>On November 28, 2002 at 16:54:25, mike schoonover wrote: >> >>>could it be that the master drive determines the access speed? >>>or,the system gives the master priority,hoging resources? >>>regards >>>mike >> >>Hello Mike, >>The only problem with that theory is the computer where the TB's are on the >>"Master" drive is the slow one. The fastest one uses the 8G/5400rpm as drive C >>(Master) and the 40G/7200rpm as drive D (Slave). The chess programs are on the >>"C" drive in both cases. >>Jim > >I would guess that the reason for the slowdown is because the virtual memory >(pagefile) is on the same drive as the tablebases. So, when it caches >information, it's copying on the same disk, while also trying to access other >tablebases. On the other machine, it copies to a different disk, which will be >much faster. > >Other things that can affect the access speed of tablebases are disk >fragmentation and the physical position of the tablebase files on the disk. If >the files are heavily fragmented on one system, and are contiguous on the other, >the fragmented ones should be quite a bit slower. Files near the beginning of >the disk have faster access times and faster transfer rates than files near the >end of the disk, as well. Thanks for trying to help. I did de-frag the drive on the slow computer and it seemed to help some. It now starts out at almost the same speed but slowly lags behind. For instance, both computers will reach 14 ply in 15 seconds on one computer and 16 seconds on the other. But when getting to say 16 ply at 2:15 on one computer it takes like 3:10 on the other. Also as you might guess, the NPS on the computers gets further apart with time. Jim
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.