I agree with the limited usefulness of split config on a T2000 in production environments but for test and dev I find it very useful. With dual port HBA's I can test 2 completely different driver stacks and multipathing solutions with one system.
On 10/29/07, Octave Orgeron <unixconsole at yahoo.com> wrote: > I forgot to copy the alias on my response to Victors questions. I think some > other people might find the information useful. > > Octave > > > *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-* > Octave J. Orgeron > Solaris Systems Engineer > http://www.opensolaris.org/os/community/sysadmin/ > http://unixconsole.blogspot.com > unixconsole at yahoo.com > *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-* > > ----- Forwarded Message ---- > From: Octave Orgeron <unixconsole at yahoo.com> > To: Victor Engle <victor.engle at gmail.com> > Sent: Sunday, October 28, 2007 8:58:06 AM > Subject: Re: [ldoms-discuss] Booting split-config with a file..cfgadm problem > > > Hi, > > First off, I doing a split-pcie config is not going to buy you much in > redundancy. This has more to do with the hardware layout than LDoms. > But here are the keypoints when you do this on a T2k: > > 1. You end up with one service/io domain with only one PCI-E slot and > two GigE ports. The other service/io domain will have 2 PCI-E slots, 2 > PCI-X slots, and two GigE ports. This limits your ability to have > redundancy for SAN, networking, etc. > 2. Only one of the service/io domains will have a SAS controller. > Meaning that only one of them has direct access to the internal storage. > 3. Even if you virtualize the internal storage from one service/io > domain to the other for its boot environment. It's a point of failure. If > the primary service/io domain goes down, the secondary won't have access > to its boot drives! If the primary doesn't come backup up in a > reasonable amount of time, you can probably guess what will happen. > 4. If you install a SCSI controller and attached external storage to > boot the second service/io domain, you consume a valuable slot. And if > it's the domain that has only one PCI-E slot, you obviously can't have an > SAN HBA. So that can affect your redundancy for SAN storage. > > So in the end, it's not something I would recommend as it doesn't buy > you a lot. It just ends up consuming more resources (VCPU, mem, IO, > etc.) that could be used by a guest domain. > > Perhaps when the hardware is layed out properly, it'll have some > advantages. I have to see how the T5120/T5220 behaves in this area. > > As for doing flash archives, the more vanilla you make the source > system, the more applicable it is across the board. So installing things > like VxVM can complicate things. I have fairly generic flash archives with > the OS and patches. This works well in all LDom types without any > issues. > > You will run into problems with cfgadm, format command, and products > like VxVM(doesn't know how to handle virtual disks). Some issues are > already resolved in Solaris Express. And other issues, like VxVM will have > to wait until the vendor releases a new version. > > > > *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-* > Octave J. Orgeron > Solaris Systems Engineer > http://www.opensolaris.org/os/community/sysadmin/ > http://unixconsole.blogspot.com > unixconsole at yahoo.com > *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-* > > ----- Original Message ---- > From: Victor Engle <victor.engle at gmail.com> > To: Alexandre Chartre <Alexandre.Chartre at sun.com> > Cc: ldoms-discuss at opensolaris.org > Sent: Sunday, October 28, 2007 5:40:10 AM > Subject: Re: [ldoms-discuss] Booting split-config with a file..cfgadm > problem > > > On 10/26/07, Alexandre Chartre <Alexandre.Chartre at sun.com> wrote: > > > > Yes, that's normal. cfgadm is not supported with virtual disks. > > This is working now. The guest domain has an hba in pcie-0 and when I > initially installed I did an initial_install jumpstart onto a physical > disk which I had exported from the control domain. > > Then I reinstalled using a flash archive created on another T2000 > which had not been configured with ldoms and this time I installed > onto a disk backed by a file. That's when I ran into the cfgadm > problem. I had the same problem when put that flash image on the > physical disk. > > The flash image had VxVM installed and I noticed that at boot it was > complaining about a bunch of stale disk links so I ran "devfsadm -C" > and that fixed the cfgadm problem. I would have expected the device > files to be created properly during the flash install. > _______________________________________________ > ldoms-discuss mailing list > ldoms-discuss at opensolaris.org > http://mail.opensolaris.org/mailman/listinfo/ldoms-discuss > > > > > __________________________________________________ > Do You Yahoo!? > Tired of spam? Yahoo! Mail has the best spam protection around > http://mail.yahoo.com > > > > > __________________________________________________ > Do You Yahoo!? > Tired of spam? Yahoo! Mail has the best spam protection around > http://mail.yahoo.com > _______________________________________________ > ldoms-discuss mailing list > ldoms-discuss at opensolaris.org > http://mail.opensolaris.org/mailman/listinfo/ldoms-discuss >
