Re: what backup software do you use?
Hi Bernie. Used to use a lot of tapes, which requires a lot of handling, tape head cleaning , tape changing and usually requires on site access. These days with big cheap hard drives, I set up on and off site backup boxes and copy the data via network to these backup servers nightly or more if needed. Best thing about this solution, is it is fast and once setup, is very reliable and requires very little user intervention. Restores are super quick too. Also if i Have a hardware failure I already have the data on a running system. No stuffing around installing compatible tape drives into new systems.. I do backup up to tape still but really only for archiving of historical data. I use FTP and RSYNC and CRON. A script can compress the data once it has made it to the backup systems so you can store many backup sets. Best regards Glenn Hocking Publish Media Pty Ltd Bernie Berg wrote: Hi, What do you use for a complete backup and recovery solution? I was looking at mondo, but thought I would ask you guys. thanks for the input. bernie -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
Re: what backup software do you use?
Hi Bernie. Used to use a lot of tapes, which requires a lot of handling, tape head cleaning , tape changing and usually requires on site access. These days with big cheap hard drives, I set up on and off site backup boxes and copy the data via network to these backup servers nightly or more if needed. Best thing about this solution, is it is fast and once setup, is very reliable and requires very little user intervention. Restores are super quick too. Also if i Have a hardware failure I already have the data on a running system. No stuffing around installing compatible tape drives into new systems.. I do backup up to tape still but really only for archiving of historical data. I use FTP and RSYNC and CRON. A script can compress the data once it has made it to the backup systems so you can store many backup sets. Best regards Glenn Hocking Publish Media Pty Ltd Bernie Berg wrote: >Hi, > > What do you use for a complete backup and recovery solution? I was looking at >mondo, but thought I would ask you guys. > >thanks for the input. > >bernie > > -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
Re: what backup software do you use?
On Wed, May 29, 2002 at 03:36:26PM -0500, Bernie Berg wrote: > > Other software has issues, like you may need 1 week to > > recover the loss of > > the data. > > > > what about open files (is this an issue?). also is there a standard way to > restore (or do you just use a rescue disk and untar?) > open files is no more issue with tar than with other softs. The use of a rescue disk with tar is what I think the strongest point of it. (also cpio is another good tool to use) With a single o 2 floppies you can restore a full crash inmediatly. If you do incremental backups, the time to restore that, is much more than full backups. Full backups every week, left you to loose one week of work at most. Doing incremental backups left you with a much more work to restore. Recover from the first tape, switch to next, update, next, update and also if you have only backups of the data, you must first install and configure again everything. I use 4 monthly backups + 3 weekly backups. No incremental backups. Also this is not a bank, where the information cost much more that a raid/fault tolerant system... The data has a price, evaluate how much cost to you. -- Carlos Barros. -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
Re: what backup software do you use?
On Wed, May 29, 2002 at 09:04:53AM -0500, Bernie Berg wrote: > Hi, > > What do you use for a complete backup and recovery solution? I was > looking at mondo, but thought I would ask you guys. > > thanks for the input. tar without compression. Very standart and very fast to recover from a HD. Other software has issues, like you may need 1 week to recover the loss of the data. -- Carlos Barros. -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
Re: what backup software do you use?
On Wed, May 29, 2002 at 03:36:26PM -0500, Bernie Berg wrote: > > Other software has issues, like you may need 1 week to > > recover the loss of > > the data. > > > > what about open files (is this an issue?). also is there a standard way to restore >(or do you just use a rescue disk and untar?) > open files is no more issue with tar than with other softs. The use of a rescue disk with tar is what I think the strongest point of it. (also cpio is another good tool to use) With a single o 2 floppies you can restore a full crash inmediatly. If you do incremental backups, the time to restore that, is much more than full backups. Full backups every week, left you to loose one week of work at most. Doing incremental backups left you with a much more work to restore. Recover from the first tape, switch to next, update, next, update and also if you have only backups of the data, you must first install and configure again everything. I use 4 monthly backups + 3 weekly backups. No incremental backups. Also this is not a bank, where the information cost much more that a raid/fault tolerant system... The data has a price, evaluate how much cost to you. -- Carlos Barros. -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
Re: what backup software do you use?
On Wed, May 29, 2002 at 09:04:53AM -0500, Bernie Berg wrote: > Hi, > > What do you use for a complete backup and recovery solution? I was looking at >mondo, but thought I would ask you guys. > > thanks for the input. tar without compression. Very standart and very fast to recover from a HD. Other software has issues, like you may need 1 week to recover the loss of the data. -- Carlos Barros. -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
Re: benchmark tool for http session
At 07:09 PM 5/29/2002 +0800, Patrick Hsieh wrote: Hello, Is there any utility for http session benchmark? Say, I'd like to emulate 150,000 http sessions to benchmark the firewall or load-balancer, any utility recommended? httperf on woody, apt-get install httperf This tool is very useful to generate traffic in different ways to simulate almost any type of "user" traffic and gives you lots of useful stats. Hope this helps, Loren -- Patrick Hsieh <[EMAIL PROTECTED]> GPG public key http://pahud.net/pubkeys/pahudatpahud.gpg -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED] -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
woody php4-imap broken?
Heyas u tough hackers you Okay, im deploying a phpgroupware to about 400 users on top of an old box and debian woody. Phpgw is a very heavy app and the machine is quite small (dual PII-400 Xeon, 1.5 GB) but i guess it will do for now. Of course i didnt go out on a limb and put all 400 ppl into this bitchass oldboxen, i started out with 70 mouse pushers, just to see how it goes Interestingly enough, it all goes rather wellid even say this goes very fast considering the box and afaik, the 400 users should be no problemEXCEPT, ive found that under heavy load, an apache process locks up and takes 100% cpu time and it never comes back until i come and slap-HUP it Why is this d**k asking in deb-isp??? Well, i kind of have loooked for weeks for the bug in phpgroupware but ive decided that, if its locking an apache from php code, it should be a php bug (php apps have a time limit) Now, im asking u guys (the ones that got this far) if youre using medium imp implantations or anything that uses php4-imap stock package and u got this same kind of problems. I mean, If its appearing in woody and its frozen, and there is no pending bug on the whole apache-php-php-imap thing in bugs.debian.org, well...dangthat cant be good. Alex -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
what backup software do you use?
Hi, What do you use for a complete backup and recovery solution? I was looking at mondo, but thought I would ask you guys. thanks for the input. bernie -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
Re: benchmark tool for http session
Hi > Example: I want to check the speed of the company's intranet webpage. > I'm going to request the index.php page 1000 times, with 5 concurrent > connections. > 'ab -n 1000 -c 5 http://192.168.1.200/index.php' this is quite a good tool. Don't know it before. But, how to protect one server for someone using this tool to produce unwanted requests that consume all the available server power? Ciao, Uwe -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
Re: benchmark tool for http session
At 07:09 PM 5/29/2002 +0800, Patrick Hsieh wrote: >Hello, > >Is there any utility for http session benchmark? Say, I'd like to >emulate 150,000 http sessions to benchmark the firewall or load-balancer, >any utility recommended? httperf on woody, apt-get install httperf This tool is very useful to generate traffic in different ways to simulate almost any type of "user" traffic and gives you lots of useful stats. Hope this helps, Loren >-- >Patrick Hsieh <[EMAIL PROTECTED]> >GPG public key http://pahud.net/pubkeys/pahudatpahud.gpg > > >-- >To UNSUBSCRIBE, email to [EMAIL PROTECTED] >with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED] -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
Re: benchmark tool for http session
Hi, AB is still your friend. You can check remote hosts. Example: I want to check the speed of the company's intranet webpage. I'm going to request the index.php page 1000 times, with 5 concurrent connections. 'ab -n 1000 -c 5 http://192.168.1.200/index.php' It will output connectiondelays (ms), transferspeeds, time-outs, etcetera. Very usefull. Just put your testbox 'before' the firewall and go ahead. AB even supports round-robin. I suggest you check out 'man ab'. ;-) Regards, Pim - Original Message - From: "Patrick Hsieh" <[EMAIL PROTECTED]> To: "Pim Effting" <[EMAIL PROTECTED]> Cc: Sent: Wednesday, May 29, 2002 1:50 PM Subject: Re: benchmark tool for http session Hello "Pim Effting" <[EMAIL PROTECTED]>, Thanks. I'd not only to test the http request, but also the tcp session. A http request to a html page could couse many tcp session. And I want to test the tcp session limit on the firewall or server load balancer. Basically, a http request could generate 5 or more http session, right? On Wed, 29 May 2002 13:31:30 +0200 "Pim Effting" <[EMAIL PROTECTED]> wrote: > Hello, > > Apache comes with 'ab'. Which means 'Apache Benchmark'. > > From the manpage: > "ab is a tool for benchmarking your Apache HyperText Transfer Protocol > (HTTP) server. It is designed to give you an impression on how performant is > your current Apache installation. This especially shows you how much > requests per time your Apache installation is capable to serve." > > Kind regards, > > Pim > - Original Message - > From: "Patrick Hsieh" <[EMAIL PROTECTED]> > To: > Sent: Wednesday, May 29, 2002 1:09 PM > Subject: benchmark tool for http session > > > > Hello, > > > > Is there any utility for http session benchmark? Say, I'd like to > > emulate 150,000 http sessions to benchmark the firewall or load-balancer, > > any utility recommended? > > -- > > Patrick Hsieh <[EMAIL PROTECTED]> > > GPG public key http://pahud.net/pubkeys/pahudatpahud.gpg > > -- Patrick Hsieh <[EMAIL PROTECTED]> GPG public key http://pahud.net/pubkeys/pahudatpahud.gpg -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
woody php4-imap broken?
Heyas u tough hackers you Okay, im deploying a phpgroupware to about 400 users on top of an old box and debian woody. Phpgw is a very heavy app and the machine is quite small (dual PII-400 Xeon, 1.5 GB) but i guess it will do for now. Of course i didnt go out on a limb and put all 400 ppl into this bitchass oldboxen, i started out with 70 mouse pushers, just to see how it goes Interestingly enough, it all goes rather wellid even say this goes very fast considering the box and afaik, the 400 users should be no problemEXCEPT, ive found that under heavy load, an apache process locks up and takes 100% cpu time and it never comes back until i come and slap-HUP it Why is this d**k asking in deb-isp??? Well, i kind of have loooked for weeks for the bug in phpgroupware but ive decided that, if its locking an apache from php code, it should be a php bug (php apps have a time limit) Now, im asking u guys (the ones that got this far) if youre using medium imp implantations or anything that uses php4-imap stock package and u got this same kind of problems. I mean, If its appearing in woody and its frozen, and there is no pending bug on the whole apache-php-php-imap thing in bugs.debian.org, well...dangthat cant be good. Alex -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
Re: benchmark tool for http session
Hello "Pim Effting" <[EMAIL PROTECTED]>, Thanks. I'd not only to test the http request, but also the tcp session. A http request to a html page could couse many tcp session. And I want to test the tcp session limit on the firewall or server load balancer. Basically, a http request could generate 5 or more http session, right? On Wed, 29 May 2002 13:31:30 +0200 "Pim Effting" <[EMAIL PROTECTED]> wrote: > Hello, > > Apache comes with 'ab'. Which means 'Apache Benchmark'. > > From the manpage: > "ab is a tool for benchmarking your Apache HyperText Transfer Protocol > (HTTP) server. It is designed to give you an impression on how performant is > your current Apache installation. This especially shows you how much > requests per time your Apache installation is capable to serve." > > Kind regards, > > Pim > - Original Message - > From: "Patrick Hsieh" <[EMAIL PROTECTED]> > To: > Sent: Wednesday, May 29, 2002 1:09 PM > Subject: benchmark tool for http session > > > > Hello, > > > > Is there any utility for http session benchmark? Say, I'd like to > > emulate 150,000 http sessions to benchmark the firewall or load-balancer, > > any utility recommended? > > -- > > Patrick Hsieh <[EMAIL PROTECTED]> > > GPG public key http://pahud.net/pubkeys/pahudatpahud.gpg > > -- Patrick Hsieh <[EMAIL PROTECTED]> GPG public key http://pahud.net/pubkeys/pahudatpahud.gpg -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
MaxClient in apache and debian
Hello, I'd like to raise the MaxClient to 1500 in the apache on Debian. Am I supposed to rebuild the .deb package? How can I keep the max limit when I use apt-get to upgrade my apache package? -- Patrick Hsieh <[EMAIL PROTECTED]> GPG public key http://pahud.net/pubkeys/pahudatpahud.gpg -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
what backup software do you use?
Hi, What do you use for a complete backup and recovery solution? I was looking at mondo, but thought I would ask you guys. thanks for the input. bernie -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
Re: benchmark tool for http session
Hi > Example: I want to check the speed of the company's intranet webpage. > I'm going to request the index.php page 1000 times, with 5 concurrent > connections. > 'ab -n 1000 -c 5 http://192.168.1.200/index.php' this is quite a good tool. Don't know it before. But, how to protect one server for someone using this tool to produce unwanted requests that consume all the available server power? Ciao, Uwe -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
Re: benchmark tool for http session
Hello, Apache comes with 'ab'. Which means 'Apache Benchmark'. >From the manpage: "ab is a tool for benchmarking your Apache HyperText Transfer Protocol (HTTP) server. It is designed to give you an impression on how performant is your current Apache installation. This especially shows you how much requests per time your Apache installation is capable to serve." Kind regards, Pim - Original Message - From: "Patrick Hsieh" <[EMAIL PROTECTED]> To: Sent: Wednesday, May 29, 2002 1:09 PM Subject: benchmark tool for http session > Hello, > > Is there any utility for http session benchmark? Say, I'd like to > emulate 150,000 http sessions to benchmark the firewall or load-balancer, > any utility recommended? > -- > Patrick Hsieh <[EMAIL PROTECTED]> > GPG public key http://pahud.net/pubkeys/pahudatpahud.gpg -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
benchmark tool for http session
Hello, Is there any utility for http session benchmark? Say, I'd like to emulate 150,000 http sessions to benchmark the firewall or load-balancer, any utility recommended? -- Patrick Hsieh <[EMAIL PROTECTED]> GPG public key http://pahud.net/pubkeys/pahudatpahud.gpg -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
Re: benchmark tool for http session
Hi, AB is still your friend. You can check remote hosts. Example: I want to check the speed of the company's intranet webpage. I'm going to request the index.php page 1000 times, with 5 concurrent connections. 'ab -n 1000 -c 5 http://192.168.1.200/index.php' It will output connectiondelays (ms), transferspeeds, time-outs, etcetera. Very usefull. Just put your testbox 'before' the firewall and go ahead. AB even supports round-robin. I suggest you check out 'man ab'. ;-) Regards, Pim - Original Message - From: "Patrick Hsieh" <[EMAIL PROTECTED]> To: "Pim Effting" <[EMAIL PROTECTED]> Cc: <[EMAIL PROTECTED]> Sent: Wednesday, May 29, 2002 1:50 PM Subject: Re: benchmark tool for http session Hello "Pim Effting" <[EMAIL PROTECTED]>, Thanks. I'd not only to test the http request, but also the tcp session. A http request to a html page could couse many tcp session. And I want to test the tcp session limit on the firewall or server load balancer. Basically, a http request could generate 5 or more http session, right? On Wed, 29 May 2002 13:31:30 +0200 "Pim Effting" <[EMAIL PROTECTED]> wrote: > Hello, > > Apache comes with 'ab'. Which means 'Apache Benchmark'. > > From the manpage: > "ab is a tool for benchmarking your Apache HyperText Transfer Protocol > (HTTP) server. It is designed to give you an impression on how performant is > your current Apache installation. This especially shows you how much > requests per time your Apache installation is capable to serve." > > Kind regards, > > Pim > - Original Message - > From: "Patrick Hsieh" <[EMAIL PROTECTED]> > To: <[EMAIL PROTECTED]> > Sent: Wednesday, May 29, 2002 1:09 PM > Subject: benchmark tool for http session > > > > Hello, > > > > Is there any utility for http session benchmark? Say, I'd like to > > emulate 150,000 http sessions to benchmark the firewall or load-balancer, > > any utility recommended? > > -- > > Patrick Hsieh <[EMAIL PROTECTED]> > > GPG public key http://pahud.net/pubkeys/pahudatpahud.gpg > > -- Patrick Hsieh <[EMAIL PROTECTED]> GPG public key http://pahud.net/pubkeys/pahudatpahud.gpg -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
Re: benchmark tool for http session
Hello "Pim Effting" <[EMAIL PROTECTED]>, Thanks. I'd not only to test the http request, but also the tcp session. A http request to a html page could couse many tcp session. And I want to test the tcp session limit on the firewall or server load balancer. Basically, a http request could generate 5 or more http session, right? On Wed, 29 May 2002 13:31:30 +0200 "Pim Effting" <[EMAIL PROTECTED]> wrote: > Hello, > > Apache comes with 'ab'. Which means 'Apache Benchmark'. > > From the manpage: > "ab is a tool for benchmarking your Apache HyperText Transfer Protocol > (HTTP) server. It is designed to give you an impression on how performant is > your current Apache installation. This especially shows you how much > requests per time your Apache installation is capable to serve." > > Kind regards, > > Pim > - Original Message - > From: "Patrick Hsieh" <[EMAIL PROTECTED]> > To: <[EMAIL PROTECTED]> > Sent: Wednesday, May 29, 2002 1:09 PM > Subject: benchmark tool for http session > > > > Hello, > > > > Is there any utility for http session benchmark? Say, I'd like to > > emulate 150,000 http sessions to benchmark the firewall or load-balancer, > > any utility recommended? > > -- > > Patrick Hsieh <[EMAIL PROTECTED]> > > GPG public key http://pahud.net/pubkeys/pahudatpahud.gpg > > -- Patrick Hsieh <[EMAIL PROTECTED]> GPG public key http://pahud.net/pubkeys/pahudatpahud.gpg -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
MaxClient in apache and debian
Hello, I'd like to raise the MaxClient to 1500 in the apache on Debian. Am I supposed to rebuild the .deb package? How can I keep the max limit when I use apt-get to upgrade my apache package? -- Patrick Hsieh <[EMAIL PROTECTED]> GPG public key http://pahud.net/pubkeys/pahudatpahud.gpg -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
Re: benchmark tool for http session
Hello, Apache comes with 'ab'. Which means 'Apache Benchmark'. >From the manpage: "ab is a tool for benchmarking your Apache HyperText Transfer Protocol (HTTP) server. It is designed to give you an impression on how performant is your current Apache installation. This especially shows you how much requests per time your Apache installation is capable to serve." Kind regards, Pim - Original Message - From: "Patrick Hsieh" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Wednesday, May 29, 2002 1:09 PM Subject: benchmark tool for http session > Hello, > > Is there any utility for http session benchmark? Say, I'd like to > emulate 150,000 http sessions to benchmark the firewall or load-balancer, > any utility recommended? > -- > Patrick Hsieh <[EMAIL PROTECTED]> > GPG public key http://pahud.net/pubkeys/pahudatpahud.gpg -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
Re: Xeon on Linux
Patrick Hsieh wrote: Hello Glenn Hocking <[EMAIL PROTECTED]>, I am planing to run MySQL on either dual P3-1G or single Xeon 2.2G. The main board is smp architecture, therefore I may add another Xeon CPU in the future. I think MySQL has no problem on smp architecture, right? Just difficult to make the decision. MySQL has no problem on smp architecture, I run it on a dual pIII-1.2GHz without problems. -- Cedric Gavage <[EMAIL PROTECTED]>-o) | http://www.unixtech.be - http://eauzone.be /\\ | _\_v | --' -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
benchmark tool for http session
Hello, Is there any utility for http session benchmark? Say, I'd like to emulate 150,000 http sessions to benchmark the firewall or load-balancer, any utility recommended? -- Patrick Hsieh <[EMAIL PROTECTED]> GPG public key http://pahud.net/pubkeys/pahudatpahud.gpg -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
Re: Xeon on Linux
On Wed, 29 May 2002 06:18, Cameron Moore wrote: > * [EMAIL PROTECTED] (Patrick Hsieh) [2002.05.28 22:28]: > > How does Linux support Xeon CPU currently? > > I am considering to use dual P-III 1G or single Xeon 2.2G architecture. > > Consider the following pages: > > http://www.intel.com/eBusiness/products/server/processor/ > http://www.intel.com/eBusiness/pdf/prod/server/xeon/wp020901.pdf > > According to that white paper, the Xeon's new "Hyper-Threading" > technology that they're bragging about should show benefits without > modifications to current apps, but they say the threading scheme makes a But it requires modifications to the OS, modifications which (AFAIK) have not been done for Linux (yet). Also as has been previously noted multi-processing raises caching and locking issues which will degrade system performance in some areas, and some applications are incapable of taking advantage of SMP. As a general rule 2*1GHz processors will deliver less performance than 1*2GHz processor even if the applications can take advantage of SMP! Also it appears from Intel's web site that a processor designed for non-SMP use can be obtained at a higher clock rate than an SMP capable processor... I don't think that 2 CPUs is a benefit. If you've got an option of 4+ CPUs then it may be worth having though. -- I do not get viruses because I do not use MS software. If you use Outlook then please do not put my email address in your address-book so that WHEN you get a virus it won't use my address in the >From field. -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
Re: Xeon on Linux
One thing, I would not go with a Xeon, only if I was planning a quad then perhaps. When you run many concurrent processes, the cache utilization goes down since you do so much context switching. Granted that recent kernels have improved much, but since you still dont have fully associative cache memories, there will be a lot of cache competition and subsequent cache flushes.. with 4+ cpu's this changes and the performance gain begins to be noticeable.. Hyperthreading do help a little bit, but not by that much.. My suggestion is go with a 2CPU Athlon or P4 system.. Compared to Xeons they are fairly cheap, and you will only loose performance in the order or 1-2%. Regards Roger Abrahamsson Cameron Moore wrote: * [EMAIL PROTECTED] (Patrick Hsieh) [2002.05.28 22:28]: How does Linux support Xeon CPU currently? I am considering to use dual P-III 1G or single Xeon 2.2G architecture. Consider the following pages: http://www.intel.com/eBusiness/products/server/processor/ http://www.intel.com/eBusiness/pdf/prod/server/xeon/wp020901.pdf According to that white paper, the Xeon's new "Hyper-Threading" technology that they're bragging about should show benefits without modifications to current apps, but they say the threading scheme makes a big difference. Having said that, unless there are some kernel developers on this list, I'd suggest searching the linux-kernel list archives for an answer or getting up the nerve to ask the kernel gurus yourself. Heck, you may even make kernel-traffic. :-) -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
Re: Xeon on Linux
Patrick Hsieh wrote: > Hello Glenn Hocking <[EMAIL PROTECTED]>, > > I am planing to run MySQL on either dual P3-1G or single Xeon 2.2G. > The main board is smp architecture, therefore I may add another Xeon CPU > in the future. > > I think MySQL has no problem on smp architecture, right? > Just difficult to make the decision. > MySQL has no problem on smp architecture, I run it on a dual pIII-1.2GHz without problems. -- Cedric Gavage <[EMAIL PROTECTED]>-o) | http://www.unixtech.be - http://eauzone.be /\\ | _\_v | --' -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
Re: Xeon on Linux
On Wed, 29 May 2002 06:18, Cameron Moore wrote: > * [EMAIL PROTECTED] (Patrick Hsieh) [2002.05.28 22:28]: > > How does Linux support Xeon CPU currently? > > I am considering to use dual P-III 1G or single Xeon 2.2G architecture. > > Consider the following pages: > > http://www.intel.com/eBusiness/products/server/processor/ > http://www.intel.com/eBusiness/pdf/prod/server/xeon/wp020901.pdf > > According to that white paper, the Xeon's new "Hyper-Threading" > technology that they're bragging about should show benefits without > modifications to current apps, but they say the threading scheme makes a But it requires modifications to the OS, modifications which (AFAIK) have not been done for Linux (yet). Also as has been previously noted multi-processing raises caching and locking issues which will degrade system performance in some areas, and some applications are incapable of taking advantage of SMP. As a general rule 2*1GHz processors will deliver less performance than 1*2GHz processor even if the applications can take advantage of SMP! Also it appears from Intel's web site that a processor designed for non-SMP use can be obtained at a higher clock rate than an SMP capable processor... I don't think that 2 CPUs is a benefit. If you've got an option of 4+ CPUs then it may be worth having though. -- I do not get viruses because I do not use MS software. If you use Outlook then please do not put my email address in your address-book so that WHEN you get a virus it won't use my address in the >From field. -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
