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From "Antony" <antonypau...@hotmail.com>
Subject Re: [OT] best hardware config for Tomcat
Date Fri, 20 Jun 2003 13:44:17 GMT
It is production server. I am a staff of the company where I have to deploy
the application. We will use the server only at office time. At most 12
hours a day. After that shut it down. I dont know  what to name this kind of
machines. I want to run the machine to run 12 hours a day and overcome the
trouble of data loss. Any way u r mails have given me lots of insight. I
think I have to learn more about hardware configurations. Why u r suggesting
dual processors ?. Can a dual processor system switch to a single processor
if one fails ?. Is there any bechmarks on hardware runningjava web
applications ? If u suggest me any discussion forums or mailing lists where
I can ask this kind of questions I will not bother u with a silly question.

Thanks for the reply
regards
Antony

----- Original Message -----
From: "John Turner" <tomcat-user@johnturner.com>
To: "Tomcat Users List" <tomcat-user@jakarta.apache.org>
Sent: Friday, June 20, 2003 6:35 PM
Subject: Re: [OT] best hardware config for Tomcat


>
> The biggest effect on Tomcat's performance will be the architecture and
> design of your application.  You can buy the biggest fastest server in the
> world, and have lousy performance if your application architecture is
poor.
>
> If this is a production server, the absolute minimum I would consider for
> "production", that is, for providing services that others pay me to
> provide, and providing those services in such a way as to have the highest
> uptime possible, is:
>
> Abs. minimum:
> P3-1.4 GHz (dual absolutely preferred)
> 1024 GB RAM
> 2 36GB SCSI drives, RAID 1 (mirrored)
> 100Mbps NIC
>
> Medium:
> Dual P3-1.4GHz
> 2GB RAM
> 3 36GB SCSI drives, RAID 5 (2 + spare = 72GB usable)
>
> Better:
> Dual P3-1.4 or higher
> 4GB RAM
> 3-5 36GB SCSI drives, RAID 5
>
> Still Better:
> Dual P3-1.4 or higher
> 6GB RAM
> as much disk as you can provide
>
> Obviously, disk depends on how much you think you will need.  My servers
> provide services to about 25 different clients.  Each has their own Tomcat
> instance.  My servers are dual P3, 6GB RAM, 800GB-1TB disk in RAID-5 with
> parity and hot spare, dual everything (dual NIC, dual power supply, dual
> fans, etc).
>
> Don't get bogged down in desktop PC terminology like DDR RAM, etc....for
> servers that sort of stuff is irrelevant.  You want stability, not
> speed...having the fastest CPU or the fastest RAM technology does you
> nothing if your server keeps going down.  For servers (if you're serious
> about it being a server), you want redundancy, parity and error-checking
> and spares over everything else.  If it were up to me, I would take a
> budget of X dollars and trade performance specs like MHz and GB for
> redundancy, all day.  Drop back on CPU and RAM if it means you can get
RAID
> disk (hardware RAID is better than software RAID), redundant power
> supplies, etc.  If all you are doing is looking to buy a desktop PC and
> call it a server, then just buy whatever you want...it won't really
matter,
> and sooner or later your "server" will go down.
>
> Even then, pay attention to the architecture and design of your
> application, and test it under load...that will make more of a difference
> than jacking up some RAM or CPU hardware.
>
> John
>
> On Fri, 20 Jun 2003 18:04:34 +0530, Antony <antonypaul24@hotmail.com>
> wrote:
>
> > Thanks for the reply. I had never thought of the RAID sub system. My
> > situation is that there is no one I know to advice me in this regard and
> > my
> > company can't affod any highly paid consultancy. That is why asked a
> > question like this here.
> > Another question. Do Tomcat a requires a faster hard disk. The
> > application uses JSP and Servlets only. No HTML pages are used and it
> > generates some PDF and Excel files. It also serves some small images
> > files
> > from local hard disk. I think Tomcat will cache these images. Now my
> > concern
> > is  whether Tomcat's performance increases by faster DDR RAM.
> >
> > regards Antony
> >
> > ----- Original Message -----
> > From: "John Turner" <tomcat-user@johnturner.com>
> > To: "Tomcat Users List" <tomcat-user@jakarta.apache.org>
> > Sent: Thursday, June 19, 2003 6:09 PM
> > Subject: Re: [OT] best hardware config for Tomcat
> >
> >
> >>
> >> I won't get into specifics, but I can tell you that if you are planning
> >> to
> >> put this server into production, and run Oracle on it, a single hard
> >> disk
> >> is the WORST thing you can do, for a whole range of reasons.
> >>
> >> In most cases, CPU and RAM are not bottlenecks...disk is.  When in
> >> doubt,
> >> get more and faster disk, even if it means less RAM and less CPU.
> >>
> >> At a minimum you will want RAID 1...better yet, two systems disks
> >> mirrored
> >> with RAID 1 containing your OS and systems files, and then a RAID 5
> >> array
> >> for Oracle.
> >>
> >> I strongly suggest you consult a professional.  Do not try to spec this
> > out
> >> on your own, it is clear that you are not familiar on some key points
of
> >> hardware provisioning.  This isn't bad, I am just suggesting that you
> >> should find someone who is familiar, and will recommend an adequate
> >> system
> >> for you.  Making the wrong decision now could harm your efforts in the
> >> future.
> >>
> >> If you're planning on putting this server into production, and selling
> >> the
> >> services on this server to other people, it would be unethical to make
> >> promises about uptime and reliability unless you at least have a RAID
> >> array, redundant power supplies, a 4-hour window service contract, and
> >> preferably a duplicate system for hot backup.
> >>
> >> John
> >>
> >> On Thu, 19 Jun 2003 12:25:47 +0530, Antony <antonypaul24@hotmail.com>
> >> wrote:
> >>
> >> > Hi all,
> >> > If it is not the place to ask this question forgive me Please any one
> >> > tell me a place to ask this question.
> >> > I want to know the most suitable hardware configuration for Tomcat.
We
> >> > have to run both Tomcat and Oracle 8i on it. It  is business(
intranet
> >> )
> >> > application with about 10 users accessing at starting but planning to
> >> > take
> >> > it to 60 users in future. Then we can increase the RAM to accommodate
> > new
> >> > users. I assume by increasing RAM we Tomcat can service more users.
Am
> >> I
> >> > right ?
> >> > I am not an admin or hardware expert. We plan to buy an assembled
> >> > system. We can afford only Intel based system. I have several
> >> questions.
> >> > Do
> >> > Tomcat need the processing power of dual processor PIV or single Xeon
> >> > processor ?. What kind of memory shall I use SDRAM or DDR ?  Do
Tomcat
> >> > need
> >> > large amount of memory or high speed memory ?.We plan to use a single
> >> > hard
> >> > disk. What type of hard disk is best for this configuration ?. SCSI
or
> >> > IDE ?
> >> > When I lloked at the Intel site I have seen different categories like
> >> > server,mainstream ,work station, performance etc. Remember I can't
> >> > recommend
> >> > any latest high cost technology.
> >> > At present three developers are using a single Pentium 4 based system
> >> > with 512 MB of SDRAM with Oracle and Tomcat running. It runs fine in
> >> it.
> >> > We
> >> > dont have conducted any stress test on it. We dont know to use JMeter
> >> or
> >> > something else. I have to give the config details within 2 days.
> >> > Any comments will be apprecited.
> >> >
> >> > Regars
> >> > Antony.
> >> >
> >> >
> >> > ---------------------------------------------------------------------
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> >> >
> >> >
> >>
> >>
> >>
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>
>
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