The dual processor just allows multithreaded environments like tomcat to run better because 2 threads can be running at anyone time instead of just one. This is especially useful because the GC can run in one proc while the other proc still handles request threads. (I think) --Angus
> -----Original Message----- > From: Antony [mailto:[EMAIL PROTECTED] > Sent: Friday, June 20, 2003 9:44 AM > To: Tomcat Users List > Subject: Re: [OT] best hardware config for Tomcat > > > 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 > > > > > > 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 > <[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 > 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 > <[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. > 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. > > >> > > > >> > > > >> > > --------------------------------------------------------------------- > > >> > To unsubscribe, e-mail: > [EMAIL PROTECTED] > > >> > For additional commands, e-mail: > [EMAIL PROTECTED] > > >> > > > >> > > > >> > > >> > > >> > > >> -- > > >> Using M2, Opera's revolutionary e-mail client: http://www.opera.com/m2/ > >> > >> --------------------------------------------------------------------- > >> To unsubscribe, e-mail: [EMAIL PROTECTED] > >> For additional commands, e-mail: [EMAIL PROTECTED] > >> > >> > > > > --------------------------------------------------------------------- > > To unsubscribe, e-mail: [EMAIL PROTECTED] > > For additional commands, e-mail: [EMAIL PROTECTED] > > > > > > > > -- > Using M2, Opera's revolutionary e-mail client: http://www.opera.com/m2/ > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
