Re: Power consumption HZ100, HZ250, HZ1000: new numbers

2005-08-02 Thread Joel Jaeggli

On Tue, 2 Aug 2005, Lars Marowsky-Bree wrote:


But rather think "data center".


The difference between using our idle cpu cycles for [EMAIL PROTECTED] or just 
leaving the xeons and opterons idle when they're not crunching away is 
around $1300 a month (yes, I know it's a big datacenter) slightly more 
than half that, is the cooling used to remove the heat generated by the 
machines. the rest is the machines themselves.



Those guys want maximum cycles per watt. One way of getting there is
using less watts when we don't use all cycles. This bring down power
consumption, which directly brings down heat production, which brings
down A/C needs.


Why pay for power you don't need to use. Why pay for a ups thats bigger 
then it has to be. Why pay for more hvac then you need. Even now an idle 
rack of dual opterons 244s is something like 4-5kw, busy is more like 
6.8-8kw.



Everyone wants to save power.


or lower their costs, or both.






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Re: ext2/3 files per directory limits

2005-02-23 Thread Joel Jaeggli
On Wed, 23 Feb 2005, Ron Peterson wrote:
I would like to better understand ext2/3's performance characteristics.
I'm specifically interested in how ext2/3 will handle a /var/spool/mail
directory w/ ~6000 mbox format inboxes, handling approx 1GB delivered as
75,000 messages daily.  Virtually all access is via imap, w/ approx
~1000 imapd processes running during peak load.  Local delivery is via
procmail, which by default uses both kernel-supported locking calls and
.lock files.
At some point it makes sense to subdivide you mail load because 
serialization of i/o on that one filesystem becomes a bigger issue than 
the performance of your filesystem... We deliver into mbox formatted 
mailboxes inside users homedirs, some folks do a similar thing with 
maildir. In the end you can on make one filesystem so fast. beyond that 
you need more filesystems to acheive any kind of reasonable scaling...

I understand that various tuning parameters will have an impact,
e.g. putting the journal on a separate device, setting the noatime mount
option, etc.  I also understand that there are other mailbox formats and
other strategies for locating mail spools (e.g. in user's home
directories).
I'm interested in people's thoughts on these issues, but I'm mostly
interested in whether or not the scenario I described falls within
ext2/3's designed capabilities.
Best.

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Re: [OT] Quad-cpu motherboard recommendation

2001-07-05 Thread Joel Jaeggli

pIII's other than xeons aren't capable of running in > 2  cpu
configurations...

you chipset choices are also limited to 450nx, profusion, and serverset
IIIHE


joelja

On Thu, 5 Jul 2001 [EMAIL PROTECTED] wrote:

> Hello,
>
> can someone please recommend a motherboard that can carry four CPUs,
> either AMD or Intel (but other than Pentium III Xeon 700 Mhz) capable of
> running Linux?
>
> Best regards,
> Ognen
>

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Re: Uncle Sam Wants YOU!

2001-07-01 Thread Joel Jaeggli

On Sun, 1 Jul 2001, William T Wilson wrote:

> On Sun, 1 Jul 2001, Ben Ford wrote:
> My understanding is that astronauts going up on the shuttle take turns
> bringing a laptop computer so they have actual computing power available
> to them.

actually the mission related laptops are thinkpads running win95...

http://www.spaceref.com/news/viewnews.html?id=213

the ISS also has some running solaris x86...

all sorts of other computers have flow as parts of payloads...

>  The shuttle computer is not adequate for many tasks because it
> is something like 30 years old, but that's what they use because it is
> certified.  So somebody has to bring along a non-certified system in their
> "personal effects" allowance to get real work done :}

avionics packages onboard the suttle have been significantly updated,
since first flight(understatement). atlantis was the first to fly with the
glass cockpit sometime in early 2000.

joelja

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Re: Microsoft and Xenix.

2001-06-26 Thread Joel Jaeggli

On Tue, 26 Jun 2001, Jocelyn Mayer wrote:

you get DR-DOS = Digital Research DOS, then you get Novell DOS, then
you get Caldera OpenDOS, currently opendos is owned by lineo

> I think I remember that DR-DOS was the name that Caldera
> gave to the Digital Research OS, previously known as GEMDOS,

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Re: Microsoft and Xenix.

2001-06-25 Thread Joel Jaeggli

On Sun, 24 Jun 2001, Rob Landley wrote:

> On Saturday 23 June 2001 23:07, Mike Castle wrote:
> > On Sat, Jun 23, 2001 at 09:41:29PM -0500, [EMAIL PROTECTED] wrote:
> > > Ah, yes, the RT/PC.  That brings back some fond memories.  My first
> > > exposure to Unix was with AIX on the RT.  I still have some of those
> > > weird-sized RT AIX manuals around somewhere...
> >
> > We always ran AOS on RT's.  Actually, the server was the only RT, the rest
> > were some other model that was basically a PS/2 (286) that booted DOS, then
> > booted the other same chip that the RT used that was on a daughter card.
> >
> > AOS was basically IBM's version of BSD.  Academic Operating System.
>
> Now if somebody here could just point me to a decent reference on A/UX -
> Apple's mid-80's version of Unix (for the early macintosh, I believe...)
>
> A big thing I'm trying to show in my book is that Unix has been, for almost
> thirty years, the standard against which everything else was compared.  Even
> when it wasn't what people were directly using it's what the techies were
> thinking about when they designed their other stuff.  (That and the Xerox
> Parc work...)
>
> Let's see, the real earthquakes in the computing world (off the top of my
> head) are:

1937 claude shannon A Symbolic Analysis of Relay and Switching Circuits,"

1948 claude shannon A mathematical theory of information.

without those you're kind in trouble on the computing front...

> MIT: project whirlwind (which got computing off of vacuum tubes, spawned DEC,
> and Minsky's hacker lab.  Gurus too numerous to mention.)
>
> Bell Labs: (the transistor, and 20 years later Unix.  Gurus ken thompson,
> dennis ritchie, the three transistor guys, ).
>
> DARPA: (Arpanet (BBN), funded project MAC at MIT, and Multics which brought
> the MIT stuff to bell labs.)
>
> Xerox Parc (WIMP interface, WYSIWYG word processing/printing/desktop
> publishing, object oriented programming,
>
> The integrated circuit/microchip (Texas Instruments' manufacturing
> innovation, which led to the Intel 4004, which eventually led to the Altair,
> which led to the personal computer.  Moore's Law would probably be the theme
> here...)
>
> The whole free software thing (Berkeley in the 70's to early 80's, Stallman
> and the FSF taking over from there.  And Andrew Tanenbaum's Minix, which
> spawned Linux...)
>
> Huh, I'd have to mention IBM (forget the PC, how about the winchester
> drive?), and of course the AT&T breakup (a negative earthquake, but big
> anyway, sort of leading to the commercialization of the software side of
> things, although Gates was trying that already.  AT&T just removed a lot of
> the roadblocks by shattering the opposition for a while.)
>
> Alright, I need to sit down and make an outline and a timeline.   I admit
> this...  (Collecting the data is the easy part.  ORGANIZING this fermenting
> heap of disconnected facts and observations is the hard part...)
>
> > mrc
>
> Rob
>
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Re: Big-ish SCSI disks

2001-05-25 Thread Joel Jaeggli

75GB 80GB 180GB all work fine...

your issues are:

location of kernel, below 8GB until you have the chance to turn on lba32
in your lilo.conf...

2GB  filesize limit bites people who use large disks more often (well at
least in my app), use reiserfs.

joelja

On Fri, 25 May 2001, Greg Johnson wrote:

> Hi kernel poeple,
>
> Can anyone out there say for certain that 76GB SCSI disks should
> just work with kernel versions 2.2 and/or 2.4? We need to get some
> big disk space and have heard reports of problems with disks
> bigger than 30GB under linux.
>
> Thanks.
>
> Greg.
>
>

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Re: Not a typewriter

2001-05-11 Thread Joel Jaeggli

On Fri, 11 May 2001 [EMAIL PROTECTED] wrote:

> >Heaven help us when tradition is more important than clarity.
> >
>
> If clarity is the most important consideration, then other things should be
> changed as well.  For instance, the command we use to search for text strings in
> files should be called "textsearch."  That's a lot more clear than "grep."

it's not clear to me that that textsearch is a more  accurate description
than Get Regular ExPression


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Re: reiserfs, xfs, ext2, ext3

2001-05-09 Thread Joel Jaeggli

I have a proxy server that's been running 2.4.3pre4 with reiserfs for the
partitions on the cache disks. it has an uptime of 43 days at this point.
it wasn't very stable at all (two crashes in one week) with 2.4.2. I'll be
building 2.4.4 something when I get back from ghana to the US, but I don't
want to reboot it onto a fresh kernel while I'm 11,000 miles away, serial
console notwithstanding.

Overall I'm of the belief that reiserfs is robust enough for mainstream
use, and it's significantly faster than ext2 for the squid box, you do as
usal need to be a bit selective about what kernel you choose to run.

On Wed, 9 May 2001, Martín Marqués wrote:

> Hi,
>
> We are waiting for a server with dual PIII, RAID 1,0 and 5 18Gb scsi disks to
> come so we can change our proxy server, that will run on Linux with Squid.
> One disk will go inside (I think?) and the other 4 on a tower conected to the
> RAID, which will be have the cache of the squid server.
>
> One of my partners thinks that we should use reiserfs on all the server (the
> partitions of the Linux distro, and the cache partitions), and I found out
> that reiserfs has had lots of bugs, and is marked as experimental in kernel
> 2.4.4. Not to mention that the people of RH discourage there users from using
> it.
>
> There has also been lots of talks about reiserfs being the cause of some data
> lose and performance lose (not sure about this last one).
>
> So what I want is to know which is the status of this 3 journaling FS. Which
> is the one we should look for?
>
> I think that the data lose is not significant in a proxy cache, if the FS is
> really fast, as is said reiserfs is.
>
> Saludos... :-)
>
>

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Re: monitor file writes

2001-05-08 Thread Joel Jaeggli

lsof will tell you what files are open and what applications are using
them.

joelja

On Tue, 8 May 2001, Dennis Bjorklund wrote:

> Is there a way in linux to montior file writes?
>
> I have something that is writing to the disk every 5:th second (approx.)
> And I don't know what it is.. In windows I had a small program called
> FileMonitor that where quite good in this situation.
>
> Is there such a program i linux? If not, is it because the kernel does not
> provide this information. Maybe there is needed some new hooks to make it
> possible?
>
>

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Re: your mail

2001-04-26 Thread Joel Jaeggli

yeah two hour upgrade window today...

joelja

On Thu, 26 Apr 2001, Alexandru Barloiu Nicolae wrote:

> is ftp.kernel.org down or is just my connections fault ?
>
> axl
>
>
> __
> support slackware anyway posible [EMAIL PROTECTED] anyone ?
>http://www.slackware.com/forum/read.php?f=5&i=7887&t=7887
>
>
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Re: More ATA100 oddity

2001-04-19 Thread Joel Jaeggli

udma 5 is ata100 udma4 is 66 so it's seeing your disk fine...

as far as the 27MB/s goes, it actually testing the disk and that's
what it got for throughput... that's acutally a pretty good number, on the
diamondmax 80 I get 23MB/s

/dev/hde:

 Model=Maxtor 98196H8, FwRev=ZAH814Y0, SerialNo=V80H9YCC
 Config={ Fixed }
 RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=57
 BuffType=DualPortCache, BuffSize=2048kB, MaxMultSect=16, MultSect=off
 CurCHS=16383/16/63, CurSects=-66060037, LBA=yes, LBAsects=160086528
 IORDY=on/off, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120}
 PIO modes: pio0 pio1 pio2 pio3 pio4
 DMA modes: mdma0 mdma1 mdma2 udma0 udma1 *udma2 udma3 udma4 udma5

/dev/hde:
 Timing buffered disk reads:  64 MB in  2.77 seconds = 23.10 MB/sec

using promise ultra-100

On Thu, 19 Apr 2001, Nicholas Petreley wrote:

> I just noticed something odd. (I'm using 2.4.3-ac9 on an
> ASUS A7V, Athlon 1000 mHz)
>
>
> (1) As noted in other messages, my machine boots up the Promise
> chipset as UDMA(100)
>
>
> hde: 80041248 sectors (40981 MB) w/2048KiB Cache, CHS=79406/16/63, UDMA(100)
>
>
> (2) hdparm recognizes it as UDMA5 with 27 MB/sec speed
>
>
> /dev/hde:
>
>  Model=Maxtor 54098H8, FwRev=DAC10SC0, SerialNo=K80EP5NC Config={ Fixed }
>  RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=57
>  BuffType=DualPortCache, BuffSize=2048kB, MaxMultSect=16,MultSect=off
>  CurCHS=16383/16/63, CurSects=16514064, LBA=yes,LBAsects=80041248
>  IORDY=on/off, tPIO={min:120,w/IORDY:120},tDMA={min:120,rec:120}
>  PIO modes: pio0 pio1 pio2 pio3 pio4
>  DMA modes: mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 udma4 *udma5
>  Timing buffered disk reads:  64 MB in  2.31 seconds = 27.71 MB/sec
>
>
>
> (3) /proc/ide/pdc202xx sees it as UDMA 4
>
>
>
> PDC20265 Chipset.
> --- General Status -
> Burst Mode   : enabled
> Host Mode: Normal
> Bus Clocking : 33 PCI Internal
> IO pad select: 10 mA
> Status Polling Period: 1
> Interrupt Check Status Polling Delay : 2
> --- Primary Channel  Secondary Channel -
> enabled  enabled
> 66 Clocking enabled  disabled
>Mode PCI Mode PCI
> FIFO Empty   FIFO Empty
> --- drive0 - drive1  drive0-- drive1 --
> DMA enabled:yes  no  no no
> DMA Mode:   UDMA 4   NOTSET  NOTSET NOTSET
> PIO Mode:   PIO 4NOTSET   NOTSETNOTSET
>
>
>
> Oh, and by the way, ACPI support has never powered off this
> machine.  Ever.  But I use apm and I'm happy.
>
>
> -Nick
>
>

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Re: Kernel 2.5 Workshop RealVideo streams -- next time, please getbetter audio.

2001-04-17 Thread Joel Jaeggli

There might be room in our educational mission for us the send someone
with equipment to support the meeting like we do with the ietf, and nanog.

joelja


On Tue, 17 Apr 2001, Theodore Tso wrote:

> On Mon, Apr 16, 2001 at 05:53:19PM -0700, David S. Miller wrote:
> >
> > It does not work in a relaxed "people sit at tables and comment
> > at arbitrary points in time during a talk" setting such as the
> > kernel summit.  Besides putting a microphone at every table (which
> > isn't all that practical honestly) I can't come up with a solution.
>
> I suspect that if we're going to do this again, having a microphone at
> each table is what we'd have to do, assuming that we can keep the
> numbers of people at the workshop down to 60-70 (which will be a *lot*
> harder next time, since everyone and his brother will want to show up,
> and will therefore pester, whine, and otherwise beg the workshop
> organizers to be included onto the invite list).
>
> If we have a lot more people, we'll probably have to go to the two
> microphones in the aisle approach.  But at that point a large part of
> the workshop will be destroyed; so hopefully we'll just be able to
> keep the numbers of people in the workshop to manageable number.
>
>   - Ted
>
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Re: Proper way to release binary driver?

2001-04-06 Thread Joel Jaeggli

Hi,

I'd take a look at how nvidia delivers the module for their video
cards...

http://www.nvidia.com/Products/Drivers.nsf/Linux.html

you build the module with your current kernel or download the one for your
distribution (limited number)

4-front tenchnologies has also done a long-term good job on this with oss

joelja

On Fri, 6 Apr 2001, Christopher Turcksin wrote:

> "Eric W. Biederman" wrote:
>
> > If what you are after is a way to release a driver that is not a
> > hassle to add to an already working system, you will find a more
> > receptive ear.  I have heard some talk, that it would be a good idea
> > to figure out how to standardize how to compile a kernel driver
> > outside the kernel tree, so it could be trivial enough that anyone
> > could do it.  To date there are enough people around who don't have
> > problems compiling their own kernel that this hasn't become a major
> > issue.
>
> Eric,
>
> I am finding myself exactly in this situation, and I've got a feeling
> that this won't be the last time either.
>
> I expect that every future Linux driver I get involved with will be
> released under GPL. However, I think that the majority of our customers
> will be running a distribution that does not yet support a new driver,
> and even at Linux speeds, it'll take a long enough time that customers
> cannot afford to wait for the next release that includes the driver.
>
> So the big issue for us appears to be how we support these customers.
>
> There is no way that we can support customers who have custom kernels,
> but since they are 'in it' enough to compile their own kernel, I guess
> they're able to apply our patch and recompile it. I actually suspect
> that there aren't that many who do this anyway.
>
> Where we find we have a problem is the number of different 'standard'
> kernels out there. We find that we need to support all releases since
> the last year or so for each distribution. And for each of those, we
> find that there are many different kernel versions (some bugfixes, some
> provide half a dozen different kernels with the CDs, aso.). And since we
> do not expect these customers to compile their own kernel, we see no
> option but to provide a precompiled binary driver. The numbers multiply
> quickly and building all of those becomes an interesting problem.
>
> We had hoped that MODVERSIONS would allow us to provide a single (or at
> most a few) binary driver. Kernels with even minor version numbers are
> supposed to be stable (even if they are buggy) ie. not have wildly
> changing kernel interfaces.
>
> In practice, that doesn't work. A driver compiled with 2.2.16 doesn't
> load with 2.2.16-5.0 (from RedHat 6.2) (just an example).
>
>
>
>

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RE: Plans for 2.5

2001-03-30 Thread Joel Jaeggli

On Thu, 29 Mar 2001, Hen, Shmulik wrote:

> Just some general questions:
>
> 1) Is there anywhere a list that describes what is intended to be in 2.5.x ?
> 2) Are there any early releases of 2.5.x ?

if it's anything like 2.1 or 2.3 we need a bit more 2.4 tidying till
somebody decides some major component needs a rewrite.

> 3) Are the things for 2.5.x being discussed on another mailing list ?
> 4) What is the time frame of releasing 2.5.x-final (or 2.6.x) ?

wow that's jumping the gun a bit.

> Specifically, I'm more interested in the network driver aspect.
> 1) Are there any intended changes to the networking layer ?

I should think.

> 2) I over heard something about making the driver reentrant - any news ?
> 3) What about support for IPv6 ? (I noticed it was marked as experimental
> until now)

one of things I'd like to see is igmpv3 support. The sprintlabs code would
need pretty serious effort to make pretty, but folks are starting to work
on getting wilberts (kpn) code into freebsd 4.3 beta so it might be time
to start looking at it.

>
>   Thanks in advance,
>   Shmulik Hen
>   Software Engineer
>   Linux Advanced Networking Services
>   Intel Network Communications Group
>   Jerusalem, Israel
>
>
> -Original Message-
> From: Bruno Avila [mailto:[EMAIL PROTECTED]]
> Sent: Thursday, March 29, 2001 12:45 AM
> To: [EMAIL PROTECTED]
> Subject: Plans for 2.5
>
>
> Hello people,
>
>   I got some questions. When are we going to develop stuff for 2.5?
> What is
> planed? My opinion for linux 2.5 should be performance. Since linux already
> is stable or well done for nature, we could thing more on performance to be
> a diferencial over others. What do you people thing?
>
>   Bruno Avila
>
> PS: Not a good english. I know! :)
>
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Re: Linux Kernel IRC Room?

2001-03-30 Thread Joel Jaeggli

there's discussion on irc.linpeople.org and irc.slashnet.org... but I'm
not sure the kernel needs an offical channel...

joelja

On Thu, 29 Mar 2001, Colin Watson wrote:

> David Lang <[EMAIL PROTECTED]> wrote:
> >how do you hold a real-time chat with people around the world? the fact
> >that the key people would seldom be on at the same time severly limits
> >it's usefullness. the mailing list does a pretty good job as is.
>
> Doesn't seem to harm #debian-devel ...
>
>

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Re: menuconfig snafu?

2001-03-28 Thread Joel Jaeggli

note also smp is enabled by default... While that's won't break most boxes
it will prevent some other things like apm from working... You sorta got
to pick your battles... no default kernel config is gonna work for
everyone.

joelja

On Wed, 28 Mar 2001, Brad Johnson wrote:

> On Wed, Mar 28, 2001 at 04:07:23PM -0500, Doug McNaught wrote:
> > Dennis <[EMAIL PROTECTED]> writes:
> >
> > > I also find it interesting that the default at kernel.org wont boot on a
> > > Pentium...generic should be the default.
> >
> > The default config is what boots on Linus' machine.  Once you realise
> > that your life get a lot easier.  ;)
>
> Hmmm... wonder why that's not a Crusoe? ;-}
>
>

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Re: Forwarding broadcast traffic

2001-03-03 Thread Joel Jaeggli

> Is it possible to selectively bridge broadcast traffic in the way I have
> described?

Take a look at how your router handles broadcast dhcp requests cisco at
least have a dhcp helper functionality which is essentially just what
you're asking for (selective forwarding of broadcast traffic.

if you really want to do this in a standard fashion though it sounds like
an application for multicast...

joelja

> Normally of course I'd have the router either being a standard router or
> a bridge but in this case some kind of hybrid arrangement would be
> preferable.
>
> Thanks for your help,
>   --jcm
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Re: DMA blues...System lockup on setting DMA mode using hdparam

2001-02-23 Thread Joel Jaeggli
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Re: Multiplexing mouse input

2001-01-30 Thread Joel Jaeggli

On Tue, 30 Jan 2001, Dax Kelson wrote:

>
> My laptop has a touchpad builtin with two buttons, I also have an external
> PS2 and/or USB mouse (3 buttons with scroll wheel).
>
> I would like to be able to use the touchpad, and then plug in the mouse
> (with either PS2 or USB connector) and use it without reconfiguring
> anything.

It's works on Toshiba's and some other varieties of laptop... typically
there's a setting like "simultanious point ing device in the bios"

> In fact, it would be cool if I could use both at the same time.

you can in those cases... in others (some older cannon laptops I know for
sure) connecting an external ps/2 device disables the internal...

> Is this possible with the new "Input Drivers" in the 2.4 kernel?  Is it
> possible with Linux at all?
>
> As a comparison, at least two other OSes, Windows 2000 and NetBSD 1.5
> multiplex mouse input and allow use of two (or more!) mice at the same
> time.
>
> Dax Kelson
>
> NetBSD "wscons console driver" info:
>
> http://www.netbsd.org/Documentation/wscons/
>
> -
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Re: Any dual AGP slot motherboards?

2000-10-19 Thread Joel Jaeggli

the AGP bus specification is for a single device (master)

you can review it at:

http://www.intel.com/technology/agp/agp_index.htm

joelja

On Thu, 19 Oct 2000, James Simmons wrote:

> 
> Hi!
> 
>  I looking for a motherboard that supports more than one AGP slot. Does
> anyone know any like this?
> 
> -
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Re: Supermicro 370DE6

2000-10-18 Thread Joel Jaeggli

we have an outstanding order for one... word from the vendor was first or
second week in november.

joelja

On Wed, 18 Oct 2000, Wakko Warner wrote:

> Has anyone tried this board with any recent 2.2 or 2.4 kernel?
> 
> It has:
> Onboard Intel 82559 Ethernet controller 
> Onboard Adaptec AIC-7899 dual channel Ultra160 SCSI controller
> ServerWorks ServerSet III HE-SL Chipset
> 
> 

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RE: Availability of kdb

2000-09-18 Thread Joel Jaeggli

Gene Amdahl I think...


On Mon, 18 Sep 2000, Marty Fouts wrote:

> I think that more people quote Brooks than have read him and that more
> people know him from the Mythical Man Month than from the POO.
> 
> He wasn't, by the way, the principle architect of OS/360; he was the manager
> of the 360 development organization.  I will email a monster cookie to the
> first person who correctly identifies the original architect of OS/360.
> 
> And yes, if Linus manages to learn some new lesson from Linux and writes a
> book about it of the endurance of MMM, I'll be shown wrong in my assertion
> about his being remembered.
> 
> By the way, my favorite part of the anniversary edition of MMM is Brooks'
> apology to Gries about being wrong about information hiding.
> 
> -Original Message-
> From: Malcolm Beattie [mailto:[EMAIL PROTECTED]]
> Sent: Monday, September 18, 2000 3:22 AM
> To: [EMAIL PROTECTED]
> Subject: Re: Availability of kdb
> 
> Marty Fouts writes:
> > Here's another piece of free advice, worth less than you paid for it: in
> 25
> > years, only the computer history trivia geeks are going to remember you,
> > just as only a very small handful of us now remember who wrote OS/360.
> 
> You mean like Fred Brooks who managed the development of OS/360, had
> some innovative ideas about how large software projects should be run,
> whose ideas clashed with contemporary ones, who became a celebrity?
> You don't spot any parallels there? He whose book "Mythical Man Month"
> with "No Silver Bullet" and "The Second System Effect" are quoted
> around the industry decades later? And you think that's only a small
> handful of people?
> 
> --Malcolm
> 
> --
> Malcolm Beattie <[EMAIL PROTECTED]>
> Unix Systems Programmer
> Oxford University Computing Services
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Re: Who ate my BogoMIPS?!

2000-09-10 Thread Joel Jaeggli

the mobile pentium III's will operate at 500mhz when disconnected from
power in order to conserve the battery unless you disable this
functionality in the bios(which yoou can do at the expense of some
battery life)... 

you should see the lower bogomips result when booting without the laptop
connected to ac power...

joelja

On 11 Sep 2000, Alexander Hoogerhuis wrote:

> A similar issue here that has cropped up with a few laptops I've
> tried: The measured BogoMIPS and CPU clock speed varies from boot to
> boot.
> 
> The machines are all Compaq Armada M700's, all models are PIII-500,
> PIII-600, PIII-650, PIII-700 and PIII-750's.  Any one of these models
> will be randomly detected as having any speed that is either a)
> correct or b) of any model below it.
> 
> It has always been tried on a kernel with APM, 2.2.14-17. If anyone
> wants more info, feel free to ask for moer info.
> 
> cheers,
> Alexander
> 
> Bernd Kischnick <[EMAIL PROTECTED]> writes:
> 
> > I'm sure I missed some redefinition,
> > but lately I noticed that the BogoMIPS count 
> > for my PowerMac has dropped rather significantly.
> > 
> > My logs still show kernel 2.4.0-test6 at 166.30 BogoMIPS ---
> > and now there are only 14.23 left! (since -test7)
> > 
> > CPU showing signs of age?
> > Should I invest in a new computer?
> > By the way, has someone tested Linux on Apple's cube? ;-)
> > 
> > - Bernd
> > -
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> 

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Re: 2T for i386

2000-08-31 Thread Joel Jaeggli


On Thu, 31 Aug 2000, Alan Cox wrote:

> > >You might be able to do that with hardware IDE raid controllers and the like
> > >such as the 3ware 8 port cards, or scsi raid controllers and then run ext3
> > >or reiserfs.
> > 
> > If you're building a 2TB array, you're not gonna do it with bloody IDE
> > hardware. (I hope you're joking.)
> 
> I used to think that. Im planning on deploying a 1Tb IDE raid using 3ware kit
> for an ftp site very soon. Its very cheap and its very fast. UDMA with
> one disk per channel and the controller doing some of the work. 
> 
> All it lacks is hot swap.

especially when you start considering size and cost requirements ide looks
particularly attractive.

75GB scsi disks are 11 platter (ibm) or 12 (seagate)  half height drives
vs the 75gxp ide (ibm) with has five platters and is 1" high. The 75GB
scsi disks are around $1500ea vs the ide which are around $550. so if
you're requirements are lots of disk space you can do ide in about 1/2 the
physical space and for about 1/3 the cost of a similar scsi
implementation, at this time.  there are of course still good reasons to
go with scsi for various applications, but raw space alone probably isn't
one of them.

we're bringing up two 675GB stripes shortly to augment an existing 160GB
stripe we have.
 
joelja

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