Dual is just a preference.
If you are just going to be using it as an intranet server, with a given number of users, for a limited time period each day, I would just buy a desktop with 2 equal size disks and use RAID 1 mirroring.
John
On Fri, 20 Jun 2003 19:14:17 +0530, Antony <[EMAIL PROTECTED]> wrote:
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" <[EMAIL PROTECTED]> To: "Tomcat Users List" <[EMAIL PROTECTED]> Sent: Friday, June 20, 2003 6:35 PM Subject: Re: [OT] best hardware config for Tomcat
poor.
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 isRAID
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 getmatter,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 reallyand sooner or later your "server" will go down.of
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 <[EMAIL PROTECTED]> 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" <[EMAIL PROTECTED]>
> To: "Tomcat Users List" <[EMAIL PROTECTED]>
> 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>> hardware provisioning. This isn't bad, I am just suggesting that youWe
>> 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 <[EMAIL PROTECTED]>
>> 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.>> > have to run both Tomcat and Oracle 8i on it. It is business(intranet>> )Am
>> > 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.>> ITomcat
>> > 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>> > needor
>> > 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>> > 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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