Re: [Ltsp-discuss] Clustering or app servers?
i have experimented with LDAP and had it working (I think) on what is now our back up server. So do I absolutely have to use LDAP to cluster servers? If so, I think I would opt to do a total new install on another box. With your experience does that seem like the best approach? Thanks On Thu, Sep 5, 2013 at 9:54 AM, Robert Mavrinac mavri...@uwindsor.cawrote: On 04/09/13 06:51 PM, Robert Lefebvre wrote: Hi, I'm not following the advantage of doing this with VMs. I've only dabbled with them but I'm thinking to add additional processing power to the network. If possible, I would like to scatter the servers throughout the school and have them double as workstations for the teachers too. I know the term server is loosely used in LTSP and isn't any special type of computer. In our network the teachers get the best, strongest machines. Often they are idle though as they are busy with students. I wasn't suggesting you should use VMs. Am I correct in believing that once the load balancer assigns a request to a particular server then that traffic would flow back and forth direct from the client through the switch to the server? That's how it works. You need one root server for the thin clients to boot from. As I said, this should also be your cluster control and load balancer. The teacher's computer's can act as application servers, but they need to be configured similarly, preferably identically, so the thin client user experiences the same environment everywhere. Also, I am assuming you have centralized authentication like LDAP and shared network home directories. Do you mean clustering beyond the load balancing LTSP would provide? Did I answer this above? Or is there some type of load balancing going on in my single server system now? Like I said, I am thinking of using teacher work stations as servers at the same time. Or is the idea totally whacked? -- Learn the latest--Visual Studio 2012, SharePoint 2013, SQL 2012, more! Discover the easy way to master current and previous Microsoft technologies and advance your career. Get an incredible 1,500+ hours of step-by-step tutorial videos with LearnDevNow. Subscribe today and save! http://pubads.g.doubleclick.net/gampad/clk?id=58041391iu=/4140/ostg.clktrk _ Ltsp-discuss mailing list. To un-subscribe, or change prefs, goto: https://lists.sourceforge.net/lists/listinfo/ltsp-discuss For additional LTSP help, try #ltsp channel on irc.freenode.net -- BungeeBones.com - A B2B Link Exchange - Free Links in limited locations - human edited and reviewed - Networked online advertising business opportunities available through our free, distributed web directory script -- Learn the latest--Visual Studio 2012, SharePoint 2013, SQL 2012, more! Discover the easy way to master current and previous Microsoft technologies and advance your career. Get an incredible 1,500+ hours of step-by-step tutorial videos with LearnDevNow. Subscribe today and save! http://pubads.g.doubleclick.net/gampad/clk?id=58041391iu=/4140/ostg.clktrk_ Ltsp-discuss mailing list. To un-subscribe, or change prefs, goto: https://lists.sourceforge.net/lists/listinfo/ltsp-discuss For additional LTSP help, try #ltsp channel on irc.freenode.net
Re: [Ltsp-discuss] Clustering or app servers?
On 06/09/13 09:22 AM, Robert Lefebvre wrote: i have experimented with LDAP and had it working (I think) on what is now our back up server. So do I absolutely have to use LDAP to cluster servers? No, you don't have to use LDAP to cluster the servers, but you should manage accounts from one source rather than trying to synchronize multiple password files. You could use NIS or Kerberos, but I wouldn't. The application servers all need to authenticate the same collection of users. If so, I think I would opt to do a total new install on another box. With your experience does that seem like the best approach? I think it might be better if you send me a more complete description of what you want the final setup to look like. As I understand it, you need a root server for clients to boot from, which is also a cluster controller and load balancer. You want multiple teacher desktop's to become the application servers. I'm sure you would probably be interested in setting up the classroom management software (epoptes) as well. Some important questions to be answered are: 1. Do the teachers all have unique accounts? 2. If so, do you have network storage for their home directories? The reason I'm asking this is that LTSP will provide you with distributed resources - each teacher could log in to any LTSP client or their own desktop (an application server) and get the exact same environment. 3. Do the students have their own accounts, or are they using computers as guests or kiosks? -- Learn the latest--Visual Studio 2012, SharePoint 2013, SQL 2012, more! Discover the easy way to master current and previous Microsoft technologies and advance your career. Get an incredible 1,500+ hours of step-by-step tutorial videos with LearnDevNow. Subscribe today and save! http://pubads.g.doubleclick.net/gampad/clk?id=58041391iu=/4140/ostg.clktrk _ Ltsp-discuss mailing list. To un-subscribe, or change prefs, goto: https://lists.sourceforge.net/lists/listinfo/ltsp-discuss For additional LTSP help, try #ltsp channel on irc.freenode.net
Re: [Ltsp-discuss] Clustering or app servers?
Thanks Robert, Each teacher and each student have their own accounts and home directories so they all log on anywhere in the school. The teacher servers (i.e. machines) will be located by the teachers work desks mainly so they can keep a close eye on them. I'm using webmin as an administrative GUI but can and do sometimes do things from the CL. The current install is EdUbuntu 12.04 w/o LDAP. The reason I was thinking of making a new install is safety because the current machine is the production unit. If I could get the main authentication and home directory server set up, add two more teacher/server cluster units then I can move the authentication passwords, user accounts, home directories and the network to the new cluster control server. After that is set up I would definitely want the current production unit to be added to the cluster but probably only as an app server right? I mean, it is the strongest machine we have and could handle most of the apps by itself whereas the authentication/ cluster control server has a lighter load and doesn't need to be as powerful correct? On Fri, Sep 6, 2013 at 10:12 AM, Robert Mavrinac mavri...@uwindsor.cawrote: On 06/09/13 09:22 AM, Robert Lefebvre wrote: i have experimented with LDAP and had it working (I think) on what is now our back up server. So do I absolutely have to use LDAP to cluster servers? No, you don't have to use LDAP to cluster the servers, but you should manage accounts from one source rather than trying to synchronize multiple password files. You could use NIS or Kerberos, but I wouldn't. The application servers all need to authenticate the same collection of users. If so, I think I would opt to do a total new install on another box. With your experience does that seem like the best approach? I think it might be better if you send me a more complete description of what you want the final setup to look like. As I understand it, you need a root server for clients to boot from, which is also a cluster controller and load balancer. You want multiple teacher desktop's to become the application servers. I'm sure you would probably be interested in setting up the classroom management software (epoptes) as well. Some important questions to be answered are: 1. Do the teachers all have unique accounts? 2. If so, do you have network storage for their home directories? The reason I'm asking this is that LTSP will provide you with distributed resources - each teacher could log in to any LTSP client or their own desktop (an application server) and get the exact same environment. 3. Do the students have their own accounts, or are they using computers as guests or kiosks? -- Learn the latest--Visual Studio 2012, SharePoint 2013, SQL 2012, more! Discover the easy way to master current and previous Microsoft technologies and advance your career. Get an incredible 1,500+ hours of step-by-step tutorial videos with LearnDevNow. Subscribe today and save! http://pubads.g.doubleclick.net/gampad/clk?id=58041391iu=/4140/ostg.clktrk _ Ltsp-discuss mailing list. To un-subscribe, or change prefs, goto: https://lists.sourceforge.net/lists/listinfo/ltsp-discuss For additional LTSP help, try #ltsp channel on irc.freenode.net -- BungeeBones.com - A B2B Link Exchange - Free Links in limited locations - human edited and reviewed - Networked online advertising business opportunities available through our free, distributed web directory script -- Learn the latest--Visual Studio 2012, SharePoint 2013, SQL 2012, more! Discover the easy way to master current and previous Microsoft technologies and advance your career. Get an incredible 1,500+ hours of step-by-step tutorial videos with LearnDevNow. Subscribe today and save! http://pubads.g.doubleclick.net/gampad/clk?id=58041391iu=/4140/ostg.clktrk_ Ltsp-discuss mailing list. To un-subscribe, or change prefs, goto: https://lists.sourceforge.net/lists/listinfo/ltsp-discuss For additional LTSP help, try #ltsp channel on irc.freenode.net
Re: [Ltsp-discuss] Clustering or app servers?
On 04/09/13 06:51 PM, Robert Lefebvre wrote: Hi, I'm not following the advantage of doing this with VMs. I've only dabbled with them but I'm thinking to add additional processing power to the network. If possible, I would like to scatter the servers throughout the school and have them double as workstations for the teachers too. I know the term server is loosely used in LTSP and isn't any special type of computer. In our network the teachers get the best, strongest machines. Often they are idle though as they are busy with students. I wasn't suggesting you should use VMs. Am I correct in believing that once the load balancer assigns a request to a particular server then that traffic would flow back and forth direct from the client through the switch to the server? That's how it works. You need one root server for the thin clients to boot from. As I said, this should also be your cluster control and load balancer. The teacher's computer's can act as application servers, but they need to be configured similarly, preferably identically, so the thin client user experiences the same environment everywhere. Also, I am assuming you have centralized authentication like LDAP and shared network home directories. Do you mean clustering beyond the load balancing LTSP would provide? Did I answer this above? Or is there some type of load balancing going on in my single server system now? Like I said, I am thinking of using teacher work stations as servers at the same time. Or is the idea totally whacked? -- Learn the latest--Visual Studio 2012, SharePoint 2013, SQL 2012, more! Discover the easy way to master current and previous Microsoft technologies and advance your career. Get an incredible 1,500+ hours of step-by-step tutorial videos with LearnDevNow. Subscribe today and save! http://pubads.g.doubleclick.net/gampad/clk?id=58041391iu=/4140/ostg.clktrk _ Ltsp-discuss mailing list. To un-subscribe, or change prefs, goto: https://lists.sourceforge.net/lists/listinfo/ltsp-discuss For additional LTSP help, try #ltsp channel on irc.freenode.net
Re: [Ltsp-discuss] Clustering or app servers?
You should be able to install the ltsp packages easily. I put the ltsp-root, ltsp-loadbalancer and ltsp-cluster-control on one VM and run a number of application server VMs. Just make sure your application servers have the same configuration/packages once you start load balancing between them. You can pretty much follow the instructions for which packages to install on which server and just follow the instructions. Since you haven't already installed ltsp cluster packages, you are pretty much working from scratch, even with your existing server. Do you mean clustering beyond the load balancing LTSP would provide? Clustering may require a lot of other work, including fencing and share disks to support fail-over scenarios and certainly doesn't make sense in an LTSP cluster. Beyond load balancing On 04/09/13 01:37 PM, Robert Lefebvre wrote: We are currently running just one Edubuntu 12.04 server with a 6 core AMD processor and 32 GB of ram but I would like to add 1 or more other servers. I've looked at the ltspcluster.org http://ltspcluster.org site and for other tutorials but they all sort of start from scratch. What I was wondering was if I can add the LTSP cluster suite (such as the load balancer,ltsp-cluster-agent,ltsp-cluster-control etc) to my current installation. And along with that I am wondering whether two independent servers each with edubuntu 12.04 installed can be clustered to work together? Thanks -- BungeeBones.com - A B2B Link Exchange - Free Links in limited locations - human edited and reviewed - Networked online advertising business opportunities available through our free, distributed web directory script -- Learn the latest--Visual Studio 2012, SharePoint 2013, SQL 2012, more! Discover the easy way to master current and previous Microsoft technologies and advance your career. Get an incredible 1,500+ hours of step-by-step tutorial videos with LearnDevNow. Subscribe today and save! http://pubads.g.doubleclick.net/gampad/clk?id=58040911iu=/4140/ostg.clktrk _ Ltsp-discuss mailing list. To un-subscribe, or change prefs, goto: https://lists.sourceforge.net/lists/listinfo/ltsp-discuss For additional LTSP help, try #ltsp channel on irc.freenode.net -- Learn the latest--Visual Studio 2012, SharePoint 2013, SQL 2012, more! Discover the easy way to master current and previous Microsoft technologies and advance your career. Get an incredible 1,500+ hours of step-by-step tutorial videos with LearnDevNow. Subscribe today and save! http://pubads.g.doubleclick.net/gampad/clk?id=58040911iu=/4140/ostg.clktrk_ Ltsp-discuss mailing list. To un-subscribe, or change prefs, goto: https://lists.sourceforge.net/lists/listinfo/ltsp-discuss For additional LTSP help, try #ltsp channel on irc.freenode.net
Re: [Ltsp-discuss] Clustering or app servers?
Hi, I'm not following the advantage of doing this with VMs. I've only dabbled with them but I'm thinking to add additional processing power to the network. If possible, I would like to scatter the servers throughout the school and have them double as workstations for the teachers too. I know the term server is loosely used in LTSP and isn't any special type of computer. In our network the teachers get the best, strongest machines. Often they are idle though as they are busy with students. Am I correct in believing that once the load balancer assigns a request to a particular server then that traffic would flow back and forth direct from the client through the switch to the server? Do you mean clustering beyond the load balancing LTSP would provide? Did I answer this above? Or is there some type of load balancing going on in my single server system now? Like I said, I am thinking of using teacher work stations as servers at the same time. Or is the idea totally whacked? On Wed, Sep 4, 2013 at 2:10 PM, Robert Mavrinac mavri...@uwindsor.cawrote: You should be able to install the ltsp packages easily. I put the ltsp-root, ltsp-loadbalancer and ltsp-cluster-control on one VM and run a number of application server VMs. Just make sure your application servers have the same configuration/packages once you start load balancing between them. You can pretty much follow the instructions for which packages to install on which server and just follow the instructions. Since you haven't already installed ltsp cluster packages, you are pretty much working from scratch, even with your existing server. Do you mean clustering beyond the load balancing LTSP would provide? Clustering may require a lot of other work, including fencing and share disks to support fail-over scenarios and certainly doesn't make sense in an LTSP cluster. Beyond load balancing On 04/09/13 01:37 PM, Robert Lefebvre wrote: We are currently running just one Edubuntu 12.04 server with a 6 core AMD processor and 32 GB of ram but I would like to add 1 or more other servers. I've looked at the ltspcluster.org site and for other tutorials but they all sort of start from scratch. What I was wondering was if I can add the LTSP cluster suite (such as the load balancer, ltsp-cluster-agent,ltsp-cluster-control etc) to my current installation. And along with that I am wondering whether two independent servers each with edubuntu 12.04 installed can be clustered to work together? Thanks -- BungeeBones.com - A B2B Link Exchange - Free Links in limited locations - human edited and reviewed - Networked online advertising business opportunities available through our free, distributed web directory script -- Learn the latest--Visual Studio 2012, SharePoint 2013, SQL 2012, more! Discover the easy way to master current and previous Microsoft technologies and advance your career. Get an incredible 1,500+ hours of step-by-step tutorial videos with LearnDevNow. Subscribe today and save!http://pubads.g.doubleclick.net/gampad/clk?id=58040911iu=/4140/ostg.clktrk _ Ltsp-discuss mailing list. To un-subscribe, or change prefs, goto: https://lists.sourceforge.net/lists/listinfo/ltsp-discuss For additional LTSP help, try #ltsp channel on irc.freenode.net -- Learn the latest--Visual Studio 2012, SharePoint 2013, SQL 2012, more! Discover the easy way to master current and previous Microsoft technologies and advance your career. Get an incredible 1,500+ hours of step-by-step tutorial videos with LearnDevNow. Subscribe today and save! http://pubads.g.doubleclick.net/gampad/clk?id=58040911iu=/4140/ostg.clktrk _ Ltsp-discuss mailing list. To un-subscribe, or change prefs, goto: https://lists.sourceforge.net/lists/listinfo/ltsp-discuss For additional LTSP help, try #ltsp channel on irc.freenode.net -- BungeeBones.com - A B2B Link Exchange - Free Links in limited locations - human edited and reviewed - Networked online advertising business opportunities available through our free, distributed web directory script -- Learn the latest--Visual Studio 2012, SharePoint 2013, SQL 2012, more! Discover the easy way to master current and previous Microsoft technologies and advance your career. Get an incredible 1,500+ hours of step-by-step tutorial videos with LearnDevNow. Subscribe today and save! http://pubads.g.doubleclick.net/gampad/clk?id=58041391iu=/4140/ostg.clktrk_ Ltsp-discuss mailing list. To un-subscribe, or change prefs, goto:
