Re: CPU for firewall machine?
In a message dated 8/10/00 9:27:30 PM Eastern Daylight Time, email@example.com
> Two or three hours ago, I had to transfer a CD image between
> two machines of mine and both of them are using el-cheapo
> 10mbps ISA cards. I started the transfers using NFS but after
> I saw that it would take my entire life for the transfer to be
> finished, I simply installed Apache on the serving side and
> used wget to pull the file. Whoa, I visibly got much better
> transfer rates and wget, at the final of the transfer said it
> got 400MB+ with a transfer rate of 915.xx KB/s, which is much
> more than 5mbps. This obviously doesn't count the overhead
> incurred by the TCP/IP protocols.
> So, this means the 486 might be subject to more than 5mbps.
> But I still believe it can handle it, depending on the needs
> of the network and pattern of usage.
Are we overlooking any cpu time traded for compression/decompression for the
smaller amount eventually sent?
Infotel has scsi cards down below 25$ ISA. For $50 you can get one w/a bios
for over 1024 cyls; over 2 disks, etc. The isa scsi ethernet cards should be
in same $ range. Then you can put 2 ethernet cards on scsi bus (just don't
let'em know about each other, or a "bridged" connection can leap from one to
the other w/o checking w/OS/cpu).
But, as stated in thread, don't even think about (allow any) disk latency for
the firewall, logging can be niced/compressed thereon to be sent out to
bigger box (w/appropriate transaction processing assurances of accurate true
receipt etc.) and disks become a non-issue (firewall effectively is diskless,
disks only buffer outbound logs data or participate in pipeline of it;
logging records created/dispatched to i/o>file/pipeline done in kernal
space-time of firewall/OS/Server processes; you're just transmitting log
files to someplace else where they "fit" better; having dealt
w/log-entry/transmit concurrency; try simple/small obvious/flagged overlap &
just start each log transmit confirm by looking from bottom end for overlap
mark/timestamp match true&accurate transfer confirm - else loop for
Jim Cunningham at "home"
If you can't remember it ... ... ... forget it.