>Jesper Brondum wrote:
>> 
>> Hi
>> 
>> I made a test (in life test) of 3 unix's to a ss1+
>> 
>> ftp a 12MB file to the ss1+ (with identical disks)
>> 
>> SunOS 4.1.3    699 kb/s    (8 meg ram)
>> NetBSD 1.3.2   420 kb/s    (16 meg ram)
>> S/Linux RH 5.1 510 kb/s    (16 meg ram)
>> 
>> How is it that the difference is that big ...
>
>
>  You seem to have changed the machine configuration (RAM) between
>tests.  Did the 4.1.3 test use a SCSI/Ethernet (FSBE) combo Sbus card? 
>The SS1, 1+, IPC, and SLC have onboard SCSI & Ethernet that share a DMA
>channel.  The ethernet has a higher priority, so when there's high
>network activity, the disk I/O rate on the onboard SCSI interface drops.
>  There are several other questions that need to be answered... Was the
>other host system changed?  Was the other host idle during all three
>tests?  How about the ethernet segment the transfer occured over?  Did
>you make any router hops?  Etc... Etc...

All three systems are identical, exept that the SunOS machine has less mem.

(They share the same HUB ... )


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                      Jesper Brondum, Cognitive AB
                            mailto:jb@ct.se
        telefon 046-130976, telefax 046-130975, mobil 0706-277766