272 lines
9.8 KiB
Perl
272 lines
9.8 KiB
Perl
.\" Copyright (c) 1983, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by the University of
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.\" California, Berkeley and its contributors.
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.\" 4. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" @(#)5.t 8.1 (Berkeley) 6/8/93
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.\"
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.\".ds RH "Sample Configuration Files
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.ne 2i
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.NH
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SAMPLE CONFIGURATION FILES
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.PP
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In this section we will consider how to configure a
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sample VAX-11/780 system on which the hardware can be
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reconfigured to guard against various hardware mishaps.
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We then study the rules needed to configure a VAX-11/750
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to run in a networking environment.
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.NH 2
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VAX-11/780 System
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.PP
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Our VAX-11/780 is configured with hardware
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recommended in the document ``Hints on Configuring a VAX for 4.2BSD''
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(this is one of the high-end configurations).
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Table 1 lists the pertinent hardware to be configured.
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.DS B
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.TS
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box;
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l | l | l | l | l
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l | l | l | l | l.
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Item Vendor Connection Name Reference
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_
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cpu DEC VAX780
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MASSBUS controller Emulex nexus ? mba0 hp(4)
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disk Fujitsu mba0 hp0
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disk Fujitsu mba0 hp1
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MASSBUS controller Emulex nexus ? mba1
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disk Fujitsu mba1 hp2
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disk Fujitsu mba1 hp3
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UNIBUS adapter DEC nexus ?
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tape controller Emulex uba0 tm0 tm(4)
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tape drive Kennedy tm0 te0
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tape drive Kennedy tm0 te1
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terminal multiplexor Emulex uba0 dh0 dh(4)
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terminal multiplexor Emulex uba0 dh1
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terminal multiplexor Emulex uba0 dh2
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.TE
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.DE
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.ce
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Table 1. VAX-11/780 Hardware support.
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.LP
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We will call this machine ANSEL and construct a configuration
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file one step at a time.
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.PP
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The first step is to fill in the global configuration parameters.
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The machine is a VAX, so the
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.I "machine type"
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is ``vax''. We will assume this system will
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run only on this one processor, so the
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.I "cpu type"
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is ``VAX780''. The options are empty since this is going to
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be a ``vanilla'' VAX. The system identifier, as mentioned before,
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is ``ANSEL,'' and the maximum number of users we plan to support is
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about 40. Thus the beginning of the configuration file looks like
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this:
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.DS
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.ta 1.5i 2.5i 4.0i
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#
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# ANSEL VAX (a picture perfect machine)
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#
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machine vax
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cpu VAX780
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timezone 8 dst
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ident ANSEL
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maxusers 40
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.DE
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.PP
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To this we must then add the specifications for three
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system images. The first will be our standard system with the
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root on ``hp0'' and swapping on the same drive as the root.
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The second will have the root file system in the same location,
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but swap space interleaved among drives on each controller.
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Finally, the third will be a generic system,
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to allow us to boot off any of the four disk drives.
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.DS
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.ta 1.5i 2.5i
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config kernel root on hp0
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config hpkernel root on hp0 swap on hp0 and hp2
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config genkernel swap generic
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.DE
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.PP
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Finally, the hardware must be specified. Let us first just try
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transcribing the information from Table 1.
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.DS
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.ta 1.5i 2.5i 4.0i
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controller mba0 at nexus ?
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disk hp0 at mba0 disk 0
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disk hp1 at mba0 disk 1
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controller mba1 at nexus ?
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disk hp2 at mba1 disk 2
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disk hp3 at mba1 disk 3
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controller uba0 at nexus ?
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controller tm0 at uba0 csr 0172520 vector tmintr
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tape te0 at tm0 drive 0
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tape te1 at tm0 drive 1
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device dh0 at uba0 csr 0160020 vector dhrint dhxint
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device dm0 at uba0 csr 0170500 vector dmintr
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device dh1 at uba0 csr 0160040 vector dhrint dhxint
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device dh2 at uba0 csr 0160060 vector dhrint dhxint
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.DE
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.LP
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(Oh, I forgot to mention one panel of the terminal multiplexor
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has modem control, thus the ``dm0'' device.)
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.PP
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This will suffice, but leaves us with little flexibility. Suppose
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our first disk controller were to break. We would like to recable the
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drives normally on the second controller so that all our disks could
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still be used without reconfiguring the system. To do this we wildcard
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the MASSBUS adapter connections and also the slave numbers. Further,
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we wildcard the UNIBUS adapter connections in case we decide some time
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in the future to purchase another adapter to offload the single UNIBUS
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we currently have. The revised device specifications would then be:
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.DS
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.ta 1.5i 2.5i 4.0i
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controller mba0 at nexus ?
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disk hp0 at mba? disk ?
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disk hp1 at mba? disk ?
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controller mba1 at nexus ?
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disk hp2 at mba? disk ?
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disk hp3 at mba? disk ?
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controller uba0 at nexus ?
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controller tm0 at uba? csr 0172520 vector tmintr
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tape te0 at tm0 drive 0
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tape te1 at tm0 drive 1
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device dh0 at uba? csr 0160020 vector dhrint dhxint
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device dm0 at uba? csr 0170500 vector dmintr
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device dh1 at uba? csr 0160040 vector dhrint dhxint
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device dh2 at uba? csr 0160060 vector dhrint dhxint
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.DE
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.LP
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The completed configuration file for ANSEL is shown in Appendix C.
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.NH 2
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VAX-11/750 with network support
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.PP
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Our VAX-11/750 system will be located on two 10Mb/s Ethernet
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local area networks and also the DARPA Internet. The system
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will have a MASSBUS drive for the root file system and two
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UNIBUS drives. Paging is interleaved among all three drives.
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We have sold our standard DEC terminal multiplexors since this
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machine will be accessed solely through the network. This
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machine is not intended to have a large user community, it
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does not have a great deal of memory. First the global parameters:
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.DS
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.ta 1.5i 2.5i 4.0i
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#
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# UCBVAX (Gateway to the world)
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#
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machine vax
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cpu "VAX780"
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cpu "VAX750"
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ident UCBVAX
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timezone 8 dst
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maxusers 32
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options INET
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options NS
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.DE
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.PP
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The multiple cpu types allow us to replace UCBVAX with a
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more powerful cpu without reconfiguring the system. The
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value of 32 given for the maximum number of users is done to
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force the system data structures to be over-allocated. That
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is desirable on this machine because, while it is not expected
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to support many users, it is expected to perform a great deal
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of work.
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The ``INET'' indicates that we plan to use the
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DARPA standard Internet protocols on this machine,
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and ``NS'' also includes support for Xerox NS protocols.
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Note that unlike 4.2BSD configuration files,
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the network protocol options do not require corresponding pseudo devices.
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.PP
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The system images and disks are configured next.
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.DS
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.ta 1.5i 2.5i 4.0i
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config kernel root on hp swap on hp and rk0 and rk1
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config upkernel root on up
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config hkkernel root on hk swap on rk0 and rk1
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controller mba0 at nexus ?
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controller uba0 at nexus ?
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disk hp0 at mba? drive 0
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disk hp1 at mba? drive 1
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controller sc0 at uba? csr 0176700 vector upintr
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disk up0 at sc0 drive 0
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disk up1 at sc0 drive 1
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controller hk0 at uba? csr 0177440 vector rkintr
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disk rk0 at hk0 drive 0
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disk rk1 at hk0 drive 1
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.DE
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.PP
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UCBVAX requires heavy interleaving of its paging area to keep up
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with all the mail traffic it handles. The limiting factor on this
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system's performance is usually the number of disk arms, as opposed
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to memory or cpu cycles. The extra UNIBUS controller, ``sc0'',
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is in case the MASSBUS controller breaks and a spare controller
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must be installed (most of our old UNIBUS controllers have been
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replaced with the newer MASSBUS controllers, so we have a number
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of these around as spares).
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.PP
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Finally, we add in the network devices.
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Pseudo terminals are needed to allow users to
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log in across the network (remember the only hardwired terminal
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is the console).
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The software loopback device is used for on-machine communications.
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The connection to the Internet is through
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an IMP, this requires yet another
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.I pseudo-device
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(in addition to the actual hardware device used by the
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IMP software). And, finally, there are the two Ethernet devices.
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These use a special protocol, the Address Resolution Protocol (ARP),
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to map between Internet and Ethernet addresses. Thus, yet another
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.I pseudo-device
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is needed. The additional device specifications are show below.
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.DS
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.ta 1.5i 2.5i 4.0i
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pseudo-device pty
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pseudo-device loop
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pseudo-device imp
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device acc0 at uba? csr 0167600 vector accrint accxint
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pseudo-device ether
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device ec0 at uba? csr 0164330 vector ecrint eccollide ecxint
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device il0 at uba? csr 0164000 vector ilrint ilcint
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.DE
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.LP
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The completed configuration file for UCBVAX is shown in Appendix C.
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.NH 2
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Miscellaneous comments
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.PP
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It should be noted in these examples that neither system was
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configured to use disk quotas or the 4.1BSD compatibility mode.
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To use these optional facilities, and others, we would probably
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clean out our current configuration, reconfigure the system, then
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recompile and relink the system image(s). This could, of course,
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be avoided by figuring out which relocatable object files are
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affected by the reconfiguration, then reconfiguring and recompiling
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only those files affected by the configuration change. This technique
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should be used carefully.
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