Aric, So I wanted to followup on this ...
Could you tell if the lockups were in the VM software, or in the guest OS? I assume/hope the lockups weren't on the host OS!?! (i.e. requires a real reboot to recover) Was the underlying host hardware SCSI as well or IDE? Cheers, BrettSh On Mon, 20 Dec 2004, Bernard, Aric wrote: > Noah, > > Just as a point of comparison, I have two Exchange 2003 Servers running > in VMs as well as some domain controllers. Originally they ran under > VMWare GSX for about 9 months and now under VS2005 for about 6 months. > The only problems I have ever had (aside from performance) occurred > during the move from GSX to VS2005. Originally I had set up the VS2005 > systems with Virtual SCSI disks, per the white paper. Unfortunately I > experienced VM lockups a dozen times during the first week. In the > troubleshooting effort I switched to Virtual IDE disks and have not had > a problem since. > > Regards, > > Aric > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Noah Eiger > Sent: Monday, December 20, 2004 8:20 AM > To: [email protected] > Subject: RE: Exchange in VM (was RE: [ActiveDir] Running DCs in Virtual > Se rver 2005 - whitepaper) > > I believe the disks are fixed size. (I will check when I get to the > office) > I will also look a the logs to see the specific errors. > > Brett, does that mean that defragging the underlying OS will have little > impact on the virtual environment? Should I defrag the virtual disks > from > within the virtual machine? And, does anyone know if the 3rd part tools > are > supported in the virtual environment? > > -- nme > > -----Original Message----- > From: Myrick, Todd (NIH/CIT) [mailto:[EMAIL PROTECTED] > Sent: Monday, December 20, 2004 3:34 AM > To: [email protected] > Subject: RE: Exchange in VM (was RE: [ActiveDir] Running DCs in Virtual > Se > rver 2005 - whitepaper) > > Man this sucks, I didn't know this White Paper existed. I have been > working > on documenting AD on VM's for both VS2005 and VMware ESX. > > You might be experiencing the fragmentation due to using the feature > that > dynamically expands the volume as it uses disk space. You might try > just > mapping raw disk space. > > Todd > > -----Original Message----- > From: Brett Shirley [mailto:[EMAIL PROTECTED] > Sent: Saturday, December 18, 2004 9:38 PM > To: [email protected] > Subject: RE: Exchange in VM (was RE: [ActiveDir] Running DCs in Virtual > Server 2005 - whitepaper) > > Noah, > > You've piqued my curiousity ... > > What VM software were you using? > > Did you "hard" reboot the VMs? > > You were experiencing actual corruption issues? I guess I'm a little > skeptical. > > Do you remember the nature of the corruptions? Were there AD JET level > recovery issues? If you still have any of the event logs, I'd be > curious > to know what JET and AD events you felt indicated corruption, and the > cause of the non-booting DC, get this via event log in DSRM (DS Restore > Mode). > > I ask, because correctness (i.e. no corruption) should not be sacraficed > b/c the underlying host has a fragmented FS. It should just be slow ... > > Cheers, > Brett Shirley > Dev > > Wooo hoo, I happened upon the actual thingy I'm supposed to put at the > bottom of my mail! Here: > This posting is provided "AS IS" with no warranties, and confers > no > rights. > > > On Sat, 18 Dec 2004, Noah Eiger wrote: > > > A little bit of a tangent: I had built an entire virtual network with > DCs > > and an Exchange server. I started getting tons of serious corruption > errors > > in the logs and soon DC2 would just not boot. It turns out that the > host > > machine was horribly fragmented. > > > > Is the presence of Exchange a likely culprit? If so, is the solution > to > run > > Exchange on a physical box patched in via a physical extension of that > > virtual network? > > > > -- nme > > > > -----Original Message----- > > From: Michael B. Smith [mailto:[EMAIL PROTECTED] > > Sent: Saturday, December 18, 2004 1:44 PM > > To: [email protected] > > Subject: RE: Exchange in VM (was RE: [ActiveDir] Running DCs in > Virtual > > Server 2005 - whitepaper) > > > > It's not support in any emulated environment. > > > > -----Original Message----- > > From: [EMAIL PROTECTED] > > [mailto:[EMAIL PROTECTED] On Behalf Of Chris Lynch > > Sent: Saturday, December 18, 2004 3:14 PM > > To: [email protected] > > Subject: RE: Exchange in VM (was RE: [ActiveDir] Running DCs in > Virtual > > Server 2005 - whitepaper) > > > > > > -----BEGIN PGP SIGNED MESSAGE----- > > Hash: SHA1 > > > > Because VS2005 wasn't designed for intensive I/O, CPU or RAM systems. > > VS2005 has on average a 35-45% overhead on the host machine, because > of > > the Host OS. Also, all VM's are running in Emulated Mode on the CPU. > > VMware would be better suited for your need of Exchange running within > a > > VM. > > > > VS2005 doesn't offer the same performance enhancements VMware ESX > server > > can, and GSX server for that matter. Ok, GSX doesn't offer CPU > resource > > throttling, like VS2005. But, I would rather spend the extra money > for > > GSX, and have a more stable virtualization platform than VS/VPC 2005. > > > > Chris > > > > > > > > > > > > List info : http://www.activedir.org/mail_list.htm > > List FAQ : http://www.activedir.org/list_faq.htm > > List archive: > http://www.mail-archive.com/activedir%40mail.activedir.org/ > > > > List info : http://www.activedir.org/mail_list.htm > List FAQ : http://www.activedir.org/list_faq.htm > List archive: > http://www.mail-archive.com/activedir%40mail.activedir.org/ > List info : http://www.activedir.org/mail_list.htm > List FAQ : http://www.activedir.org/list_faq.htm > List archive: > http://www.mail-archive.com/activedir%40mail.activedir.org/ > > > > List info : http://www.activedir.org/mail_list.htm > List FAQ : http://www.activedir.org/list_faq.htm > List archive: > http://www.mail-archive.com/activedir%40mail.activedir.org/ > List info : http://www.activedir.org/mail_list.htm > List FAQ : http://www.activedir.org/list_faq.htm > List archive: http://www.mail-archive.com/activedir%40mail.activedir.org/ > List info : http://www.activedir.org/mail_list.htm List FAQ : http://www.activedir.org/list_faq.htm List archive: http://www.mail-archive.com/activedir%40mail.activedir.org/
