Hello everyone! I am setting up a couple of Xen servers for the first time and I have a couple of questions. Also, as this is my first attempt at using Xen, if you spot anything in my descriptions that looks to be a stupid thing to do, please let me know. As an overview, I will be running 4-5 domU machines on 2 dom0''s . The dom0 machines will be doing nothing but managing the domU machines. I will be using an iSCSI SAN for the storage on my domU machines. All OS''s will be FC5. I have not yet decided whether to put my domU OS''s on physical partitions or on the SAN. I am leaning toward using the SAN, as that will give me the most flexibility and make live migrations easier. Thoughts? Anyone know which will preform better: Mapping the iSCSI drives to dom0 and assigning them to each domU as a phy (such as /dev/sda) or mapping them directly on each domU? I will have 4GB of physical RAM per physical server. How much of that should I reserve for the dom0''s, keeping in mind that they will not be running any apps of their own, just managing the domU''s? Thanks! -- Anthony Valentine Asst. I.T. Manager Spenard Builders Supply UNIX was not designed to stop you from doing stupid things, because that would also stop you from doing clever things. _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Anthony Valentine wrote:> Hello everyone! > > I am setting up a couple of Xen servers for the first time and I have > a couple of questions. Also, as this is my first attempt at using > Xen, if you spot anything in my descriptions that looks to be a > stupid thing to do, please let me know. > > As an overview, I will be running 4-5 domU machines on 2 dom0''s . The > dom0 machines will be doing nothing but managing the domU machines. I > will be using an iSCSI SAN for the storage on my domU machines. All > OS''s will be FC5. > > > I have not yet decided whether to put my domU OS''s on physical > partitions or on the SAN. I am leaning toward using the SAN, as that > will give me the most flexibility and make live migrations easier. > Thoughts? >If you go through this mailing lists it self you can see a lot of discussions about performance of SAN, Physical partition, Lvm partition and File as vbd. Please do a quick search. I think SAN can provide better performance than others.> > Anyone know which will preform better: Mapping the iSCSI drives to > dom0 and assigning them to each domU as a phy (such as /dev/sda) or > mapping > them directly on each domU? >Better you use LVM if possible so that resizing would be easy.> > I will have 4GB of physical RAM per physical server. How much of that > should I reserve for the dom0''s, keeping in mind that they will not be > running any apps of their own, just managing the domU''s? >I use only 64 MB of ram for Dom-0, its functin is controlling dom-U''s, which run 20 live Dom-U''s. I have beenwaiting for months to get a cause to increase the ram for Dom-0, but didn''t have any such causes.> > Thanks! >_______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Hello everyone! I am setting up a couple of Xen servers for the first time and I have a couple of questions. Also, as this is my first attempt at using Xen, if you spot anything in my descriptions that looks to be a stupid thing to do, please let me know. As an overview, I will be running 4-5 domU machines on 2 dom0''s . The dom0 machines will be doing nothing but managing the domU machines. I will be using an iSCSI SAN for the storage on my domU machines. All OS''s will be FC5. I have not yet decided whether to put my domU OS''s on physical partitions or on the SAN. I am leaning toward using the SAN, as that will give me the most flexibility and make live migrations easier. Thoughts? Anyone know which will preform better: Mapping the iSCSI drives to dom0 and assigning them to each domU as a phy (such as /dev/sda) or mapping them directly on each domU? I will have 4GB of physical RAM per physical server. How much of that should I reserve for the dom0''s, keeping in mind that they will not be running any apps of their own, just managing the domU''s? Thanks! -- Anthony Valentine Asst. I.T. Manager Spenard Builders Supply UNIX was not designed to stop you from doing stupid things, because that would also stop you from doing clever things. _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users