.\" $Cambridge: hermes/doc/talks/2005-02-eximconf/arch.pic,v 1.1 2005/02/09 17:42:33 fanf2 Exp $
.\"
.\" Architecture of email system
.\"
.ds < \fI\s-1
.ds > \fR\s+1
.PS

maxpswid = 6.0

arrowht  = 0.0625
arrowwid = 0.0375

boxht    = 0.40
boxwid   = 0.75

define cyrus {[
  START:
    for i = 0 to 7 do {
      box "\fIcyrus-$1\fP · · \fI$2\fP" "msg. stores" fill 0 width 1 with .s at START + (0.06 * i, -0.03 * i)
    }
]}

C1: cyrus(1,8)
arrow <-> "pair-wise" "replication" 1
C2: cyrus(9,16)

C1n: line <-> up 0.25 from C1.n
C2n: line <-> up 0.25 from C2.n

PN: line from C1n.end - (2.5,0) to C2n.end + (2.0,0)

line dashed from last line.start +(0,1.125) to last line.end +(0,1.125)


line  -> " POP"  ljust up 0.25 from 1/6 <C2n.end,C1n.end>
line <-> " IMAP" ljust up 0.25 from 3/6 <C2n.end,C1n.end>
line <-  " LMTP" ljust up 0.25 from 5/6 <C2n.end,C1n.end>
line  -> " SMTP" ljust up 0.25 from 7/6 <C2n.end,C1n.end>

"\*<ppsw.cam\*>" above at last line.end


line <-> "IMAP " rjust up 0.25 from PN.end - (0.75,0)

MUA: box "" "\fIhermes-1\fP,\fI2\fP" "MUA servers" height 0.625 width 1

line -> "SMTP" below left 0.5 from MUA.left

"" "\*<smtp.\*> " rjust "\*<hermes\*> " rjust

PPSW: box "\s+2\f(BIppsw-0\fP · · · \f(BIppsw-9\fP\s-2" height 0.625 width 4


move left 0.25 from PPSW.left

box "admin" "server"

line <-> down 0.375 from last box.s

move right 0.375

line -> down 0.175

box "backup" "server"
line down 0.075
box "disk shelf" height 0.15
line down 0.075
box "tape robot" height 0.15


"Pine " rjust below at MUA.ne

line <- " ssh" ljust right 0.25 up 0.66 from 1/4 <MUA.ne,MUA.nw>
box "ssh and" "telnet"

" webmail" ljust below at MUA.nw

line <- "HTTP " rjust left 0.25 up 0.66 from 1/4 <MUA.nw,MUA.ne>
box "web" "browsers"


line -> "POP " rjust up 0.66 from 1/10 <PPSW.ne,PPSW.nw>
"\*<pop.hermes\*>" below at last line.start

line <-> "IMAP " rjust up 0.66 from 3/10 <PPSW.ne,PPSW.nw>
box "mail user agents" width 2
"\*<imap.hermes\*>" below at last line.start

line <- "submit " rjust up 0.66 from 5/10 <PPSW.ne,PPSW.nw>
"\*<smtp.hermes\*>" below at last line.start


line <-> "SMTP " rjust left 0.125 up 0.66 from 7/10 <PPSW.ne,PPSW.nw>
box "Cam Univ" "servers"
"\*<ppsw.cam\*>" below at last line.start

line <-> "SMTP  " rjust left 0.25 up 0.66 from 9/10 <PPSW.ne,PPSW.nw>
ellipse "The" "Internet" width 1 with .se at last line.end
"\*<mx.cam\*>" below at last line.start


.PE