Re: [qmailtoaster] Hypervisor recommendations for virtualizing QMT
Hi, On Fri, Jan 27, 2012 at 4:43 AM, Casey Price ca...@smileglobal.com wrote: That is a good point Peter...Xen is working great on the systems I'm currently using it on at the moment. Even Amazon is using Xen for their EC2. The one thing I really want is some type of snapshot or backup system for Xen that would allow me to backup guests while they are running. Also, some form of migration capabilities...maybe not quite as far as vMotion (although I wouldn't complain if it were free...but it is way out of my price range). I have my Xen guests on their logical volumes. I simply do LVM snapshots and then use dd to copy the image of the VM to another server if I need to do a full backup of the machine. Otherwise I use BackupPC for regular backups. Best, Peter - Qmailtoaster is sponsored by Vickers Consulting Group (www.vickersconsulting.com) Vickers Consulting Group offers Qmailtoaster support and installations. If you need professional help with your setup, contact them today! - Please visit qmailtoaster.com for the latest news, updates, and packages. To unsubscribe, e-mail: qmailtoaster-list-unsubscr...@qmailtoaster.com For additional commands, e-mail: qmailtoaster-list-h...@qmailtoaster.com
Re: [qmailtoaster] Hypervisor recommendations for virtualizing QMT
To be honest, this is akin to asking which Linux Distro is best... ask 100 people, and get 102 different answers! I used Xen in CentOS 5, and now use KVM in CentOS 6 (yes, I like CentOS better than the more popular Debian-based distros). I found little difficulty in migrating from my knowledge of Xen to getting some knowledge about KVM. I've been quite happy with both, and even successfully migrated a hosted Windows 2003 client from an older Xen host to a newer KVM one (with faster networking too!). In fact, I found the CLI interface for managing clients easier in KVM than I did with Xen... a big plus for me, as I tend to prefer a non-GUI server install! I suspect there will be some performance preferences for one or the other (and my understanding is that Xen has gained entrance to the base kernel, so KVM is no longer the only kernel-based VM option). Just my thoughts... they're as personal (and unique) as any of the others... Dan IT4SOHO On 1/26/2012 1:44 AM, Casey Price wrote: Hi all, I'm curious to hear which hypervisors some of you guys are using for virtualizing QMT or just VMs in general. I played around with Citrix XenServer for a good 6-8 months last year, very very briefly checked out Hyper-V, and currently am running Xen on CentOS 5.7 on a few of my PowerEdge 2650's. I also briefly tried out VMware's free one...ESXi? From what I've been hearing, KVM is supposed to be the new up and coming standard. I haven't used it at all and don't know much about it, but I was hoping to get some recommendations from others on here. Someone mentioned Proxmox on here a few weeks back, so I downloaded Proxmox VE 1.9 and installed it on a server I just recently bought the other night. That's about as far as I've gotten with it at this point, so maybe someone can provide some insight? -- Casey Price Smile Global Technical Support Submit or check trouble tickets http://billing.smileglobal.com www.smileglobal.com http://www.smileglobal.com Follow us on Twitter https://twitter.com/#%21/SmileInternet Find us on Facebook https://www.facebook.com/smileglobal
Re: [qmailtoaster] Hypervisor recommendations for virtualizing QMT
Hi, On Thu, Jan 26, 2012 at 8:44 AM, Casey Price ca...@smileglobal.com wrote: I'm curious to hear which hypervisors some of you guys are using for virtualizing QMT or just VMs in general. I played around with Citrix XenServer for a good 6-8 months last year, very very briefly checked out Hyper-V, and currently am running Xen on CentOS 5.7 on a few of my PowerEdge 2650's. I also briefly tried out VMware's free one...ESXi? From what I've been hearing, KVM is supposed to be the new up and coming standard. I haven't used it at all and don't know much about it, but I was hoping to get some recommendations from others on here. Someone mentioned Proxmox on here a few weeks back, so I downloaded Proxmox VE 1.9 and installed it on a server I just recently bought the other night. That's about as far as I've gotten with it at this point, so maybe someone can provide some insight? I've ran my toaster in a centos5 + xen combination and been quite happy with it. No stability or perfomance issuses whatsoever. Xen is not officially supported in rhel/centos version 6, but there is a 3rd party repository for the kernel/xen packages and those have been working with ok for my dom0 and web server domUs. As qmailtoaster does not support centos6 yet, I havent tried installing a toaster on centos6 domU though. I would be interested in trying out KVM, but for me it has seemed still a bit immature, so I went with 3rd party Xen. And as time resources are limited I don't want to waste time learning another technology as I have a working solution with Xen. Regards, Peter - Qmailtoaster is sponsored by Vickers Consulting Group (www.vickersconsulting.com) Vickers Consulting Group offers Qmailtoaster support and installations. If you need professional help with your setup, contact them today! - Please visit qmailtoaster.com for the latest news, updates, and packages. To unsubscribe, e-mail: qmailtoaster-list-unsubscr...@qmailtoaster.com For additional commands, e-mail: qmailtoaster-list-h...@qmailtoaster.com
Re: [qmailtoaster] Hypervisor recommendations for virtualizing QMT
I use both Vsphere 4.1 and ESX1 4.0 One commercial qmail server , the second just for home use and testing builds. On 1/26/2012 2:12 AM, Peter Peltonen wrote: Hi, On Thu, Jan 26, 2012 at 8:44 AM, Casey Priceca...@smileglobal.com wrote: I'm curious to hear which hypervisors some of you guys are using for virtualizing QMT or just VMs in general. I played around with Citrix XenServer for a good 6-8 months last year, very very briefly checked out Hyper-V, and currently am running Xen on CentOS 5.7 on a few of my PowerEdge 2650's. I also briefly tried out VMware's free one...ESXi? From what I've been hearing, KVM is supposed to be the new up and coming standard. I haven't used it at all and don't know much about it, but I was hoping to get some recommendations from others on here. Someone mentioned Proxmox on here a few weeks back, so I downloaded Proxmox VE 1.9 and installed it on a server I just recently bought the other night. That's about as far as I've gotten with it at this point, so maybe someone can provide some insight? I've ran my toaster in a centos5 + xen combination and been quite happy with it. No stability or perfomance issuses whatsoever. Xen is not officially supported in rhel/centos version 6, but there is a 3rd party repository for the kernel/xen packages and those have been working with ok for my dom0 and web server domUs. As qmailtoaster does not support centos6 yet, I havent tried installing a toaster on centos6 domU though. I would be interested in trying out KVM, but for me it has seemed still a bit immature, so I went with 3rd party Xen. And as time resources are limited I don't want to waste time learning another technology as I have a working solution with Xen. Regards, Peter - Qmailtoaster is sponsored by Vickers Consulting Group (www.vickersconsulting.com) Vickers Consulting Group offers Qmailtoaster support and installations. If you need professional help with your setup, contact them today! - Please visit qmailtoaster.com for the latest news, updates, and packages. To unsubscribe, e-mail: qmailtoaster-list-unsubscr...@qmailtoaster.com For additional commands, e-mail: qmailtoaster-list-h...@qmailtoaster.com - Qmailtoaster is sponsored by Vickers Consulting Group (www.vickersconsulting.com) Vickers Consulting Group offers Qmailtoaster support and installations. If you need professional help with your setup, contact them today! - Please visit qmailtoaster.com for the latest news, updates, and packages. To unsubscribe, e-mail: qmailtoaster-list-unsubscr...@qmailtoaster.com For additional commands, e-mail: qmailtoaster-list-h...@qmailtoaster.com
Re: [qmailtoaster] Hypervisor recommendations for virtualizing QMT
On 01/26/2012 01:12 AM, Peter Peltonen wrote: Hi, On Thu, Jan 26, 2012 at 8:44 AM, Casey Priceca...@smileglobal.com wrote: I'm curious to hear which hypervisors some of you guys are using for virtualizing QMT or just VMs in general. I played around with Citrix XenServer for a good 6-8 months last year, very very briefly checked out Hyper-V, and currently am running Xen on CentOS 5.7 on a few of my PowerEdge 2650's. I also briefly tried out VMware's free one...ESXi? From what I've been hearing, KVM is supposed to be the new up and coming standard. I haven't used it at all and don't know much about it, but I was hoping to get some recommendations from others on here. Someone mentioned Proxmox on here a few weeks back, so I downloaded Proxmox VE 1.9 and installed it on a server I just recently bought the other night. That's about as far as I've gotten with it at this point, so maybe someone can provide some insight? I've ran my toaster in a centos5 + xen combination and been quite happy with it. No stability or perfomance issuses whatsoever. Xen is not officially supported in rhel/centos version 6, but there is a 3rd party repository for the kernel/xen packages and those have been working with ok for my dom0 and web server domUs. As qmailtoaster does not support centos6 yet, I havent tried installing a toaster on centos6 domU though. I would be interested in trying out KVM, but for me it has seemed still a bit immature, so I went with 3rd party Xen. And as time resources are limited I don't want to waste time learning another technology as I have a working solution with Xen. Regards, Peter - Qmailtoaster is sponsored by Vickers Consulting Group (www.vickersconsulting.com) Vickers Consulting Group offers Qmailtoaster support and installations. If you need professional help with your setup, contact them today! - Please visit qmailtoaster.com for the latest news, updates, and packages. To unsubscribe, e-mail: qmailtoaster-list-unsubscr...@qmailtoaster.com For additional commands, e-mail: qmailtoaster-list-h...@qmailtoaster.com Excuse the stupid question, but what's the advantage of VM over hardware? Are you running multiple instances of VM? Isn't there a performance loss over hard iron when running multiple instances? CJ -- Cecil Yother, Jr. cj cj's 2318 Clement Ave Alameda, CA 94501 tel 510.865.2787 http://yother.com Check out the new Volvo classified resource http://www.volvoclassified.com - Qmailtoaster is sponsored by Vickers Consulting Group (www.vickersconsulting.com) Vickers Consulting Group offers Qmailtoaster support and installations. If you need professional help with your setup, contact them today! - Please visit qmailtoaster.com for the latest news, updates, and packages. To unsubscribe, e-mail: qmailtoaster-list-unsubscr...@qmailtoaster.com For additional commands, e-mail: qmailtoaster-list-h...@qmailtoaster.com
Re: [qmailtoaster] Hypervisor recommendations for virtualizing QMT
On 01/26/2012 01:12 AM, Peter Peltonen wrote: Hi, On Thu, Jan 26, 2012 at 8:44 AM, Casey Priceca...@smileglobal.com wrote: I'm curious to hear which hypervisors some of you guys are using for virtualizing QMT or just VMs in general. I played around with Citrix XenServer for a good 6-8 months last year, very very briefly checked out Hyper-V, and currently am running Xen on CentOS 5.7 on a few of my PowerEdge 2650's. I also briefly tried out VMware's free one...ESXi? From what I've been hearing, KVM is supposed to be the new up and coming standard. I haven't used it at all and don't know much about it, but I was hoping to get some recommendations from others on here. Someone mentioned Proxmox on here a few weeks back, so I downloaded Proxmox VE 1.9 and installed it on a server I just recently bought the other night. That's about as far as I've gotten with it at this point, so maybe someone can provide some insight? I've ran my toaster in a centos5 + xen combination and been quite happy with it. No stability or perfomance issuses whatsoever. Xen is not officially supported in rhel/centos version 6, but there is a 3rd party repository for the kernel/xen packages and those have been working with ok for my dom0 and web server domUs. As qmailtoaster does not support centos6 yet, I havent tried installing a toaster on centos6 domU though. I would be interested in trying out KVM, but for me it has seemed still a bit immature, so I went with 3rd party Xen. And as time resources are limited I don't want to waste time learning another technology as I have a working solution with Xen. Regards, Peter - Qmailtoaster is sponsored by Vickers Consulting Group (www.vickersconsulting.com) Vickers Consulting Group offers Qmailtoaster support and installations. If you need professional help with your setup, contact them today! - Please visit qmailtoaster.com for the latest news, updates, and packages. To unsubscribe, e-mail: qmailtoaster-list-unsubscr...@qmailtoaster.com For additional commands, e-mail: qmailtoaster-list-h...@qmailtoaster.com Excuse the stupid question, but what's the advantage of VM over hardware? Are you running multiple instances of VM? Isn't there a performance loss over hard iron when running multiple instances? Nah, not stupid if you haven't had the need. VM allows one iron box server (Host) to run multiple instances of other servers (Guests) within it. Those guests can be anything from Windows, Linux, workstation, server, I think even MAC but not sure. The gain is where most time a hard box running something like mail or database might spend it's life at 10% load or less. Why waste the other 90%? Also, why have the duplicate hardware like drives, power supplies, etc. Just to help visualize, I'm running VSphere 4.1. I have 2 quad core dual xeon socket servers with 16G in each. For storage, there's a NAS box (Qnap) with 4Tb sharing out NFS shares. On those shares are the files for my VM guests. The 2 servers (hosts) reach into the NFS and run the guests much like you run instances of Word, Excell, etc. Within those 2 hosts, I have a total of I think 10 guests all running. Web servers, mail servers, database servers, etc. Very cool huh? As they say, you aint seen nothin' yet. Here's where the magic comes in... Since both hosts are same hardware and they are managed centrally, if one host drops dead, within seconds the other host picks up the dead hosts running guest servers. Just like clustering but for the whole server not just an application. Also, if one of the guests starts getting out of hand and eats up the hosts resources, other guests will migrate to the other host to give it room. All AUTOMAGICALLY!!
Re: [qmailtoaster] Hypervisor recommendations for virtualizing QMT
On 01/25/2012 11:44 PM, Casey Price wrote: Hi all, I'm curious to hear which hypervisors some of you guys are using for virtualizing QMT or just VMs in general. I played around with Citrix XenServer for a good 6-8 months last year, very very briefly checked out Hyper-V, and currently am running Xen on CentOS 5.7 on a few of my PowerEdge 2650's. I also briefly tried out VMware's free one...ESXi? From what I've been hearing, KVM is supposed to be the new up and coming standard. I haven't used it at all and don't know much about it, but I was hoping to get some recommendations from others on here. Someone mentioned Proxmox on here a few weeks back, so I downloaded Proxmox VE 1.9 and installed it on a server I just recently bought the other night. That's about as far as I've gotten with it at this point, so maybe someone can provide some insight? I run my toasters as guests under VMware Server, soon to migrate to ESXi v4. After getting over initial configuration issues (mostly related to time sync configuration) I haven't had any problems. It's nice to be able to snapshot the system before applying major updates. If there's a problem, rolling back to a known good state is a single click. Haven't tried any other virtualization technologies yet. Brent Gardner - Qmailtoaster is sponsored by Vickers Consulting Group (www.vickersconsulting.com) Vickers Consulting Group offers Qmailtoaster support and installations. If you need professional help with your setup, contact them today! - Please visit qmailtoaster.com for the latest news, updates, and packages. To unsubscribe, e-mail: qmailtoaster-list-unsubscr...@qmailtoaster.com For additional commands, e-mail: qmailtoaster-list-h...@qmailtoaster.com
Re: [qmailtoaster] Hypervisor recommendations for virtualizing QMT
On 1/26/12 1:12 AM, Peter Peltonen wrote: Hi, On Thu, Jan 26, 2012 at 8:44 AM, Casey Priceca...@smileglobal.com wrote: I'm curious to hear which hypervisors some of you guys are using for virtualizing QMT or just VMs in general. I played around with Citrix XenServer for a good 6-8 months last year, very very briefly checked out Hyper-V, and currently am running Xen on CentOS 5.7 on a few of my PowerEdge 2650's. I also briefly tried out VMware's free one...ESXi? From what I've been hearing, KVM is supposed to be the new up and coming standard. I haven't used it at all and don't know much about it, but I was hoping to get some recommendations from others on here. Someone mentioned Proxmox on here a few weeks back, so I downloaded Proxmox VE 1.9 and installed it on a server I just recently bought the other night. That's about as far as I've gotten with it at this point, so maybe someone can provide some insight? I've ran my toaster in a centos5 + xen combination and been quite happy with it. No stability or perfomance issuses whatsoever. Xen is not officially supported in rhel/centos version 6, but there is a 3rd party repository for the kernel/xen packages and those have been working with ok for my dom0 and web server domUs. As qmailtoaster does not support centos6 yet, I havent tried installing a toaster on centos6 domU though. That is a good point Peter...Xen is working great on the systems I'm currently using it on at the moment. Even Amazon is using Xen for their EC2. The one thing I really want is some type of snapshot or backup system for Xen that would allow me to backup guests while they are running. Also, some form of migration capabilities...maybe not quite as far as vMotion (although I wouldn't complain if it were free...but it is way out of my price range). I would be interested in trying out KVM, but for me it has seemed still a bit immature, so I went with 3rd party Xen. And as time resources are limited I don't want to waste time learning another technology as I have a working solution with Xen. I'm curious about KVM as well, and will probably test with it a little bit and see what I think. I don't really get why RedHat decided to stop supporting xen. Does anyone have anything to say about RHEV or oVirt? Is there any type of CentOS-based RHEV? What type of virtualization is VMware doing with ESX? Is it KVM, Xen, or something else? Anyone try using Cloudmin to manage your virtual servers? Regards, Peter - Qmailtoaster is sponsored by Vickers Consulting Group (www.vickersconsulting.com) Vickers Consulting Group offers Qmailtoaster support and installations. If you need professional help with your setup, contact them today! - Please visit qmailtoaster.com for the latest news, updates, and packages. To unsubscribe, e-mail: qmailtoaster-list-unsubscr...@qmailtoaster.com For additional commands, e-mail: qmailtoaster-list-h...@qmailtoaster.com Casey Price Smile Global Technical Support Submit or check trouble tickets http://billing.smileglobal.com www.smileglobal.com http://www.smileglobal.com Follow us on Twitter https://twitter.com/#%21/SmileInternet Find us on Facebook https://www.facebook.com/smileglobal
[qmailtoaster] Hypervisor recommendations for virtualizing QMT
Hi all, I'm curious to hear which hypervisors some of you guys are using for virtualizing QMT or just VMs in general. I played around with Citrix XenServer for a good 6-8 months last year, very very briefly checked out Hyper-V, and currently am running Xen on CentOS 5.7 on a few of my PowerEdge 2650's. I also briefly tried out VMware's free one...ESXi? From what I've been hearing, KVM is supposed to be the new up and coming standard. I haven't used it at all and don't know much about it, but I was hoping to get some recommendations from others on here. Someone mentioned Proxmox on here a few weeks back, so I downloaded Proxmox VE 1.9 and installed it on a server I just recently bought the other night. That's about as far as I've gotten with it at this point, so maybe someone can provide some insight? -- Casey Price Smile Global Technical Support Submit or check trouble tickets http://billing.smileglobal.com www.smileglobal.com http://www.smileglobal.com Follow us on Twitter https://twitter.com/#%21/SmileInternet Find us on Facebook https://www.facebook.com/smileglobal
