Hi all, I want to start experimenting with clusters, and I would like to use normal desktop grade hardware for this. I have some extra PC components lying around, enough to build 3 - 4 moderate desktops with a PIV / C2D CPU & 512MB - 1GB RAM each. All the machines should have at least a 100MB NIC, but I can add a gigabit NIC to the machines that doesn''t have it if need be. I have used Linux Heartbeat to failover a MySQL cluster before, and it''s actually been running very well for about 3 years now. But, I want to start looking @ total clustering, with DRBD - where everything (not just MySQL) is being replicated across the 4 machines. I''m also intereated in load balancing. Has anyone done anything like this? The cluster will be running / hosting a few XEN Virtual Machines, and idealy if one PC / server dies (hardware failure / power failure / etc), then on of the other machines should still be running the virtual machines, i.e. no downtime. Is this possible? Can somone steer me into a direction where I can get more info on this? My aim: to use common, cheap PC equipment & CentOS for the project, I don''t want to spend any more money, and want to use what I have. -- Kind Regards Rudi Ahlers _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Waldirio Manhães Pinheiro
2008-Dec-03 10:16 UTC
Re: [Xen-users] does anyone have experience with clusters?
Good Morning Rudi Check here to start your cluster environment and configuration - http://www.redhat.com/docs/manuals/enterprise/RHEL-AS-2.1-Manual/cluster-manager/ Good Luck Waldirio On Wed, Dec 3, 2008 at 7:08 AM, Rudi Ahlers <rudiahlers@gmail.com> wrote:> Hi all, > > I want to start experimenting with clusters, and I would like to use > normal desktop grade hardware for this. I have some extra PC > components lying around, enough to build 3 - 4 moderate desktops with > a PIV / C2D CPU & 512MB - 1GB RAM each. All the machines should have > at least a 100MB NIC, but I can add a gigabit NIC to the machines that > doesn''t have it if need be. > > I have used Linux Heartbeat to failover a MySQL cluster before, and > it''s actually been running very well for about 3 years now. But, I > want to start looking @ total clustering, with DRBD - where everything > (not just MySQL) is being replicated across the 4 machines. I''m also > intereated in load balancing. > > Has anyone done anything like this? > > The cluster will be running / hosting a few XEN Virtual Machines, and > idealy if one PC / server dies (hardware failure / power failure / > etc), then on of the other machines should still be running the > virtual machines, i.e. no downtime. Is this possible? Can somone steer > me into a direction where I can get more info on this? > > My aim: to use common, cheap PC equipment & CentOS for the project, I > don''t want to spend any more money, and want to use what I have. > > -- > > Kind Regards > Rudi Ahlers > > _______________________________________________ > Xen-users mailing list > Xen-users@lists.xensource.com > http://lists.xensource.com/xen-users >-- ______________ Atenciosamente Waldirio msn: waldirio@gmail.com Site: www.waldirio.com.br Blog: blog.waldirio.com.br PGP: www.waldirio.com.br/public.html _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Rudi Ahlers
2008-Dec-03 10:46 UTC
Re: [Xen-users] does anyone have experience with clusters?
On Wed, Dec 3, 2008 at 12:16 PM, Waldirio Manhães Pinheiro <waldirio@gmail.com> wrote:> Good Morning Rudi > > Check here to start your cluster environment and configuration - > http://www.redhat.com/docs/manuals/enterprise/RHEL-AS-2.1-Manual/cluster-manager/ > > Good Luck > Waldirio > > On Wed, Dec 3, 2008 at 7:08 AM, Rudi Ahlers <rudiahlers@gmail.com> wrote: >> Hi all, >> >> I want to start experimenting with clusters, and I would like to use >> normal desktop grade hardware for this. I have some extra PC >> components lying around, enough to build 3 - 4 moderate desktops with >> a PIV / C2D CPU & 512MB - 1GB RAM each. All the machines should have >> at least a 100MB NIC, but I can add a gigabit NIC to the machines that >> doesn''t have it if need be. >> >> I have used Linux Heartbeat to failover a MySQL cluster before, and >> it''s actually been running very well for about 3 years now. But, I >> want to start looking @ total clustering, with DRBD - where everything >> (not just MySQL) is being replicated across the 4 machines. I''m also >> intereated in load balancing. >> >> Has anyone done anything like this? >> >> The cluster will be running / hosting a few XEN Virtual Machines, and >> idealy if one PC / server dies (hardware failure / power failure / >> etc), then on of the other machines should still be running the >> virtual machines, i.e. no downtime. Is this possible? Can somone steer >> me into a direction where I can get more info on this? >> >> My aim: to use common, cheap PC equipment & CentOS for the project, I >> don''t want to spend any more money, and want to use what I have. >> >> -- >> >> Kind Regards >> Rudi Ahlers >> >> _______________________________________________ >> Xen-users mailing list >> Xen-users@lists.xensource.com >> http://lists.xensource.com/xen-users >> > > > > -- > ______________ > Atenciosamente > Waldirio > msn: waldirio@gmail.com > Site: www.waldirio.com.br > Blog: blog.waldirio.com.br > PGP: www.waldirio.com.br/public.html >Hi Waldirio, I have gone through that document already, but I don''t see how it handles load balancing, i.e. sharing resources across servers. -- Kind Regards Rudi Ahlers _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Nick Couchman
2008-Dec-03 13:21 UTC
Re: [Xen-users] does anyone have experience with clusters?
The first issue that I can spot is that I believe DRBD only supports 2 machines per volume at most. Now, you could probably work out some sort of combo DRBD + software RAID arrangement that would let you get it onto all four machines, but you may end up with issues with the data sync''ing correctly. Network-attached storage is very, very easy to come by these days - you can pick up a simple, two-disk mirroring device that supports NFS (and sometimes even iSCSI) for a few hundred USD. Maybe this is out of the question - no idea what sort of a budget you''re going on here, but getting something like that would alleviate the problem of getting more than just two of the PCs synchronized with DRBD. It looks like the company that sponsors DRBD, LINBIT, has a commercial offering of it that supports synchronization with more than two machines. -Nick>>> "Rudi Ahlers" <rudiahlers@gmail.com> 2008/12/03 02:08 >>>Hi all,but I want to start experimenting with clusters, and I would like to use normal desktop grade hardware for this. I have some extra PC components lying around, enough to build 3 - 4 moderate desktops with a PIV / C2D CPU & 512MB - 1GB RAM each. All the machines should have at least a 100MB NIC, but I can add a gigabit NIC to the machines that doesn''t have it if need be. I have used Linux Heartbeat to failover a MySQL cluster before, and it''s actually been running very well for about 3 years now. But, I want to start looking @ total clustering, with DRBD - where everything (not just MySQL) is being replicated across the 4 machines. I''m also intereated in load balancing. Has anyone done anything like this? The cluster will be running / hosting a few XEN Virtual Machines, and idealy if one PC / server dies (hardware failure / power failure / etc), then on of the other machines should still be running the virtual machines, i.e. no downtime. Is this possible? Can somone steer me into a direction where I can get more info on this? My aim: to use common, cheap PC equipment & CentOS for the project, I don''t want to spend any more money, and want to use what I have. -- Kind Regards Rudi Ahlers This e-mail may contain confidential and privileged material for the sole use of the intended recipient. If this email is not intended for you, or you are not responsible for the delivery of this message to the intended recipient, please note that this message may contain SEAKR Engineering (SEAKR) Privileged/Proprietary Information. In such a case, you are strictly prohibited from downloading, photocopying, distributing or otherwise using this message, its contents or attachments in any way. If you have received this message in error, please notify us immediately by replying to this e-mail and delete the message from your mailbox. Information contained in this message that does not relate to the business of SEAKR is neither endorsed by nor attributable to SEAKR. _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users