Re: [CentOS] Bonding and Xen
On Tuesday 15 July 2008 22:34:56 Victor Padro wrote: Does anyone has implemented this sucessfully? I am asking this because we are implementing Xen on our test lab machines, which they hold up to three 3com and intel Nics 10/100mbps based. These servers are meant to replace MS messaging and intranet webservers which holds up to 5000 hits per day and thousands of mails, and probably the Dom0 could not handle this kind of setup with only one 100mbps link, and could not afford changing all the networking hardware to gigabit, at least not yet. Any pointers perhaps? Just go the normal way. As long as you are not using VLANs on top of bonds the default bridgescripts should do just fine. Before starting with using a bond as no active/backup configuration I urge you to read and understand the bonding.txt from the kernel-source: http://www.mjmwired.net/kernel/Documentation/networking/bonding.txt or just websearcch: bonding.txt The problem is not to configure the bonding on a linux-machine but to get the network setup right (Etherchannel, LACP, one switch or multiple switches, etc.) and know what to expect from which setup. And last but not least human communication between network guys and os-guys. That are the biggest problem with bonding in my experience. -marc. Greetings from Mexico. -- It is human nature to think wisely and act in an absurd fashion. Todo el desorden del mundo proviene de las profesiones mal o mediocremente servidas -- Gruss / Regards, Marc Grimme http://www.atix.de/ http://www.open-sharedroot.org/ ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
RE: [CentOS] Bonding and Xen
-Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Victor Padro Sent: Wednesday, 16 July 2008 8:34 AM To: CentOS mailing list Subject: Re: [CentOS] Bonding and Xen We're not using windows under Xen, we're trying to get rid of M$(reducing licensing fees mostly). Pray tell, what are you replacing Exchange with? My end users are dependent on Exchange for calendaring but organization is becoming more and more anti MS and it won't be long before they decide enough is enough, especially being that some savvy users refused to upgrade to Vista and are now using CentOS as their preferred desktop. These savvy users are software developers who were previously using XP and multiple PuTTY sessions to get the job done! Cheers, AK. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Bonding and Xen
From: Anthony Kamau -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Victor Padro Sent: Wednesday, 16 July 2008 8:34 AM To: CentOS mailing list Subject: Re: [CentOS] Bonding and Xen We're not using windows under Xen, we're trying to get rid of M$(reducing licensing fees mostly). Pray tell, what are you replacing Exchange with? My end users are dependent on Exchange for calendaring but organization is becoming more and more anti MS and it won't be long before they decide enough is enough, especially being that some savvy users refused to upgrade to Vista and are now using CentOS as their preferred desktop. These savvy users are software developers who were previously using XP and multiple PuTTY sessions to get the job done! I am currently testing Sun Java Communications Suite 5 on Centos 5.2 http://www.sun.com/software/communications_suite/index.xml which seems to be a good alternative for Exchange. There is a free Outlook connector and the documentation is very good. Its free, if you don't need technical support. Regards Lars ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Bonding and Xen
Victor Padro [EMAIL PROTECTED] writes: Does anyone has implemented this sucessfully? I have not used bonding with xen, but once you have a bonded interface in the Dom0 it should be trivial. setup your bonded interface as usual, then in /etc/xend-config.sxp where it says (network-script network-bridge) set it to (network-script 'network-bridge netdev=bond0') it should just work. These servers are meant to replace MS messaging and intranet webservers which holds up to 5000 hits per day and thousands of mails, and probably the Dom0 could not handle this kind of setup with only one 100mbps link, and could not afford changing all the networking hardware to gigabit, at least not yet. 100Mbps is a whole lot of bandwidth for a webserver unless you are serving video or large file downloads or something. 100Mbps is enough to choke a very powerful mailserver, nevermind exchange. I suspect that if you are using windows on Xen, disk and network I/O to and from the windows DomU will be a bigger problem than network speeds. Are you using the paravirtualized windows drivers? without them, network and disk IO is going to feel pretty slow in windows, no matter how fast the actual network or disk is. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Bonding and Xen
I have not used bonding with xen, but once you have a bonded interface in the Dom0 it should be trivial. setup your bonded interface as usual, then in /etc/xend-config.sxp where it says (network-script network-bridge) set it to (network-script 'network-bridge netdev=bond0') it should just work. Somewhere I read that a while ago...will make notes about that, thank you. 100Mbps is a whole lot of bandwidth for a webserver unless you are serving video or large file downloads or something. 100Mbps is enough to choke a very powerful mailserver, nevermind exchange. Webservers are used to upload video and audio conferences and even stream them across the LAN and access SugarCRM to download/view reports, etc. If we use only one M$ exchange server sometimes gets bottlenecked with all those kinds of mails sent. avi's mpeg's videos, wav's, mp3's, excel and powerpoint docs, etc. But we have 2 backups that can handle all just fine, so we're trying to replace them with a Xen cluster based on Centos and postfix. I suspect that if you are using windows on Xen, disk and network I/O to and from the windows DomU will be a bigger problem than network speeds. Are you using the paravirtualized windows drivers? without them, network and disk IO is going to feel pretty slow in windows, no matter how fast the actual network or disk is. We're not using windows under Xen, we're trying to get rid of M$(reducing licensing fees mostly). We use CentOS for SugarCRM and Debian for DNS, but want to use CentOS for everything if we could. -- It is human nature to think wisely and act in an absurd fashion. Todo el desorden del mundo proviene de las profesiones mal o mediocremente servidas ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
