Author: Vincent Lejeune
Date: 07:02:37 12/17/04
Go up one level in this thread
On December 17, 2004 at 04:39:41, Dann Corbit wrote: >On December 17, 2004 at 03:36:51, Vincent Lejeune wrote: > >>On December 17, 2004 at 02:37:32, Vincent Lejeune wrote: >> >>>On December 16, 2004 at 23:20:34, Paul Byrne wrote: >>> >>>>On December 16, 2004 at 22:23:49, Dann Corbit wrote: >>>> >>>>>On December 16, 2004 at 20:56:56, Robert Hyatt wrote: >>>>> >>>>>>On December 16, 2004 at 18:25:42, Vincent Lejeune wrote: >>>>>> >>>>>>>On December 16, 2004 at 17:31:10, Scott Gasch wrote: >>>>>>> >>>>>>>>On December 16, 2004 at 14:46:33, Dann Corbit wrote: >>>>>>>> >>>>>>>>>On December 16, 2004 at 03:37:46, Gian-Carlo Pascutto wrote: >>>>>>>>> >>>>>>>>>>On December 15, 2004 at 22:24:49, Alex wrote: >>>>>>>>>> >>>>>>>>>>>Of course it would be foolish to buy a New computer now...... Micrsoft is going >>>>>>>>>>>to present a 64 bit OS nest year, the Christmas prices of new computers will >>>>>>>>>>>drop like a BRICK by Jan 1.......... But ! Let us speculate.... Hmmmmmmmmmm >>>>>>>>>>>What will 64 bit DO for chesss programs ....Yes yes I KNOW AMD has New processor >>>>>>>>>>>that does 64 bit..... but what is the difference ..reallY? D >>>>>>>>>> >>>>>>>>>>Speed. >>>>>>>>>> >>>>>>>>>>You can expect programs to get 10-60% faster from 64 bit mode. >>>>>>>>>> >>>>>>>>>>This is in addition to the Athlon64 already being so fast in 32 bit mode. >>>>>>>>> >>>>>>>>>Another potential advantage is the large address space. >>>>>>>>> >>>>>>>>>With terabytes of ram directly addressable, potentially totally new solution >>>>>>>>>ideas may be formulated. >>>>>>>>> >>>>>>>>>For instance, you could memory map the 3-4-5 man tablebase files and lose the >>>>>>>>>disk access penalty. That might make them give a large Elo boost, while the >>>>>>>>>disk access method for 32 bit systems seems to be about break even. >>>>>>>>> >>>>>>>>>You could have 20 GB hash tables. >>>>>>>>> >>>>>>>>>You could store (in ram) a large tree of every chess game ever played together >>>>>>>>>with statistical information on each node. >>>>>>>> >>>>>>>>...of course this all assumes you have a machine with 20Gb of physical memory >>>>>>>>and a chipset that supports that much RAM. Until the cost of memory comes way >>>>>>>>down, you won't see me mapping EGTB files (compressed or not) into memory. :) >>>>>>>> >>>>>>>>Scott >>>>>>> >>>>>>>I'd suggest 2 pen drive USB like this : >>>>>>>http://www.supermediastore.com/pendrive-4gb-flash-drive.html >>>>>>> >>>>>>>Yes, no that cheap, but all 3-4-5 egtb way faster than disk >>>>>> >>>>>> >>>>>>"faster than disk"? What kind of disk do you use for your egtb's? Floppy or >>>>>>CDRom? :) The think you gave a link to is horribly slow compared to anything >>>>>>except for CD/floppy drives... >>>>> >>>>>480Mbps seems pretty fast to me. >>>>>What kind of disks are you using? >>>>>;-) >>>> >>>>They lie. :) I think 480 Mpbs is the limit for usb 2.0; nothing to do with >>>>the actual speed... they mention 7 Mbps on that page. Maybe 3 ms to read a >>>>tablebase block? I looked a while back with a similar idea, the latency >>>>of those things was a millisecond or two also. So it *might* be a little faster >>>>than a hard drive, but if it is, it won't be by a huge amount... >>>>-paul >>> >>> >>>read: 7000KByte/s >>>and access time is very low compare to disk ! >> >>and if you want better performance than USB go for ATA : >>http://www.memtech.com/35inch.html > >While 26 MB/sec read throughput sounds fairly impressive: > >2 to 60 Gbyte capacity >16 Gbytes under 16mm >Full -40°C to +85°C industrial temperature >Low-profile 3.5" drive form-factor >Unitized 40 pin IDE and 4-pin power shrouded header >96-bit ECC for exceptional data reliability >5-volt, low power operation >2000G operating shock >20G operating vibration >16 Mbyte Cache >26 Mbyte/sec Read throughput >20 Mbytes/sec Write throughput >10 year data integrity > > > The AT3550 Wolverine solid-state flash drive is a UDMA-66 compliant IDE memory >module offered in an extremely low profile 3.5 inch drive form-factor. The >primary storage media within the drive is sector erasable NAND EEPROMs (Flash >Memory). Using these devices, Memtech is able to deliver up to 60 Gbytes of >uncompressed, nonvolatile solid state storage in an extremely small, rugged >form-factor. The access time for the drive is under 0.1 milliseconds, which >permits thousands of transactions to occur per second. Sporting a UDMA-66 >compliant interface with a 66 Mbyte/sec burst data rate, cached read data rates >are 26 Mbytes/second, with cached writes going at 20 Mbytes/second. An >integrated holdup circuit guarantees data integrity under brownout or power-fail >conditions. > >It's nearly 3-4 times slower than 15K U320 SCSI: >http://www.storagereview.com/php/benchmark/compare_rtg_2001.php?typeID=10&testbedID=3&osID=4&raidconfigID=1&numDrives=1&devID_0=279&devID_1=277&devID_2=272&devID_3=273&devCnt=4 It's nearly 55 times faster than 15K U320 SCSI: 5.5 ms to 0.1 ms access time > >Between 97.4 MB/sec and 74.4 MB/sec for Maxtor Atlas 15K II (147 GB Ultra320 >SCSI), depending on the platter position during the write.
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