Configure a DNS to use SCAN for Solaris VMs

Grid Version: 11.2.0.3
Planning a two node RAC cluster
I am creating a RAC setup with Solaris VM in my Desktop. Although it is a VM setup, I don't want to use /etc/hosts file for name resolution as I am going to fully test SCAN. ie. All SCAN VIPs rotating in round robin manner when nslookup is executed.
Can I make one of my 2-node RAC a DNS server ?
If anyone has any document on Linux/Solaris, please let me know.

Hi,
technically yes, but it would not help you in a way. If the node with the DNS server dies your cluster will not function correctly anymore.
However for a test cluster, you don't need DNS. You can simply stay with 1 address for the SCAN, which is totally enough (for test, not production). No need to go through DNS setup. This would be an overkill for this VBox setup.
Regards
Sebastian

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If you found this post helpful, please give it a "Helpful" vote.
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Here's what I'd do, based upon a whole lot of experience with Solaris 10 and not so much with Solaris 11, and also assuming this box is going to be around for a good long time as an Oracle DB server:
1. Don't use SVM for your boot drives. Use the onboard RAID controller to make TWO 2-disk RAID-1 mirrors. Use these for TWO ZFS root pools. Why two? Because if you use live upgrade to patch the OS, you want to create a new boot environment in a separate ZFS pool. If you use live upgrade to create new boot environments in the same ZFS pool, you wind up with a ZFS clone/snapshot hell. If you use two separate root pools, each new boot environment is a pool-to-pool actual copy that gets patched, so there are no ZFS snapshot/clone dependencies between the boot environments. Those snapshot/clone dependencies can cause a lot of problems with full disk drives if you wind up with a string of boot environments, and at best they can be a complete pain in the buttocks to clean up - assuming live upgrade doesn't mess up the clones/snapshots so badly you CAN'T clean them up (yeah, it has been known to do just that...). You do your first install with a ZFS rpool, then create rpool2 on the other mirror. Each time you do an lucreate to create a new boot environment from the current boot environment, create the new boot environment in the rpool that ISN'T the one the current boot environment is located in. That makes for ZERO ZFS dependencies between boot environments (at least in Solaris 10. Although with separate rpools, I don't see how that could change....), and there's no software written that can screw up a dependency that doesn't exist.
2. Create a third RAID-1 mirror either with the onboard RAID controller or ZFS, Use those two drives for home directories. You do NOT want home directories located on an rpool within a live upgrade boot environment. If you put home directories inside a live upgrade boot environment, 1) that can be a LOT of data that gets copied, 2) if you have to revert back to an old boot environment because the latest OS patches broke something, you'll also revert every user's home directory back.
3. That leaves you 10 drives for a RAID-6 array for DB data. 8 data and two parity. Perfect. I'd use the onboard RAID controller if it supports RAID-6, otherwise I'd use ZFS and not bother with SVM.
This also assumes you'd be pretty prompt in replacing any failed disks as there are no global spares. If there would be significant time before you'd even know you had a failed disk (days or weeks), let alone getting them replaced, I'd rethink that. In that case, if there were space I'd probably put home directories in the 10-disk RAID-6 drive, using ZFS to limit how big that ZFS file system could get. Then use the two drives freed up for spares.
But if you're prompt in recognizing failed drives and getting them replaced, you probably don't need to do that. Although you might want to just for peace of mind if you do have the space in the RAID-6 pool.
And yes, using four total disks for two OS root ZFS pools seems like overkill. But you'll be happy when four years from now you've had no problems doing OS upgrades when necessary, with minimal downtime needed for patching, and with the ability to revert to a previous OS patch level with a simple "luactivate BENAME; init 6" command.
If you have two or more of these machines set up like that in a cluster with Oracle data on shared storage you could then do OS patching and upgrades with zero database downtime. Use lucreate to make new boot envs on each cluster member, update each new boot env, then do rolling "luactivate BENAME; init 6" reboots on each server, moving on to the next server after the previous one is back and fully operational after its reboot to a new boot environment.

How to configure DHCP on linux jumpstart for solaris installation

I have configured jumpstart on linux and able to install solaris on SUN sparcs
using rarp and bootparams files.now im trying to use linux DHCP for solaris clients. I have the done the DHCP setup on linux using this doc http://www.sun.com/bigadmin/content/submitted/setup_dhcp.jsp.
but when im trying to boot the sun spac client with boot net:dhcp - install command it is failing with error "panic - boot: Could not mount filesystem.
Program terminated". exports file is ok and NFS service is also running.
Please help me on this issue.
Thanks in advance.
Shashi

Darren,
Thanks for the response.
I tried to install client60001dev (sparc client) from server60060pxe (linux jumpstart) as follows
client60001dev is able to get the IP address from server60060pxe DHCP and then the boot file also, but after that the client is not showing any NFS queries.
{0} ok boot net:dhcp - install
Boot device: /pci@1f,4000/network@1,1:dhcp File and args: - install
Using Onboard Transceiver - Link Up.
Timeout waiting for BOOTP/DHCP reply. Retrying ...
Timeout waiting for BOOTP/DHCP reply. Retrying ...
2aa00
Server IP address: xx.xx.xx.119
Client IP address: xx.xx.xx.111
Subnet Mask : 255.255.255.0
Using Onboard Transceiver - Link Up.
panic - boot: Could not mount filesystem.
Program terminated
tcpdump on server60060pxe
03:16:12.292836 IP server60060pxe.42445 > client60001dev.20759: UDP, len
gth 516
03:16:12.303646 IP client60001dev.20759 > server60060pxe.42445: UDP, len
gth 4
03:16:12.303669 IP server60060pxe.42445 > client60001dev.20759: UDP, len
gth 516
03:16:12.314479 IP client60001dev.20759 > server60060pxe.42445: UDP, len
gth 4
03:16:12.314501 IP server60060pxe.42445 > client60001dev.20759: UDP, len
gth 516
03:16:12.325313 IP client60001dev.20759 > server60060pxe.42445: UDP, len
gth 4
03:16:12.325347 IP server60060pxe.42445 > client60001dev.20759: UDP, len
gth 516
03:16:12.336158 IP client60001dev.20759 > server60060pxe.42445: UDP, len
/var/log/messages on server60060pxe
Feb 26 03:15:35 server60060pxe dhcpd: DHCPDISCOVER from 08:00:20:fe:4a:23 via eth0.
369
Feb 26 03:15:35 server60060pxe dhcpd: DHCPOFFER on xx.xx.xx.111 to 08:00:20:fe:4
a:23 via eth0.369
Feb 26 03:16:08 server60060pxe dhcpd: Dynamic and static leases present for 139.185
.168.111.
Feb 26 03:16:08 server60060pxe dhcpd: Remove host declaration client60001dev or remove
139.185.168.111
Feb 26 03:16:08 server60060pxe dhcpd: from the dynamic address pool for xx.xx.xx
/24
Feb 26 03:16:08 server60060pxe dhcpd: DHCPREQUEST for xx.xx.xx.111 (xx.xx.xx.
119) from 08:00:20:fe:4a:23 via eth0.369
Feb 26 03:16:08 server60060pxe dhcpd: DHCPACK on xx.xx.xx.111 to 08:00:20:fe:4a:
23 via eth0.369
Feb 26 11:16:09 server60060pxe in.tftpd[10266]: RRQ from xx.xx.xx.111 filename 8
BB9A86F
Feb 26 03:22:00 server60060pxe kernel: eth0.369: dev_set_promiscuity(master, -1)
Feb 26 03:22:00 server60060pxe kernel: device eth0 left promiscuous mode
Feb 26 03:22:00 server60060pxe kernel: device eth0.369 left promiscuous mode
Shashi

I would appreciate it if someone could advise me as to the optimum resolution, dimensions and dpi for actual photographic slides that I am scanning for use in a Keynote Presentation, that will be projected in a large auditorium. I realize that most proje

I would appreciate it if someone could advise me as to the optimum resolution, dimensions and dpi for actual photographic slides that I am scanning for use in a Keynote Presentation, that will be projected in a large auditorium. I realize that most projectors in auditoriums that I will be using have 1024 x 1200 pixels, and possibly 1600 x 1200. There is no reference to this issue in the Keynote Tutorial supplied by Apple, and I have never found a definitive answer to this issue online (although there may be one).
Here’s my question: When scanning my photographic slides, what setting, from 72 dpi to 300 dpi, would result in the best image quality and use up the most efficient amount of space?
Here’s what two different photo slide scanning service suppliers have told me:
Supplier No. 1 tells me that they can scan slides to a size of 1544 x 1024 pixels, at 72 dpi, which will be 763 KB, and they refer to this as low resolution (a JPEG). However, I noticed when I looked at these scanned slides, the size of the slides varied, with a maximum of 1.8 MB. This supplier says that the dpi doesn’t matter when it comes to the quality of the final digital image, that it is the dimensions that matter. They say that if they scanned a slide to a higher resolution (2048 x 3072), they would still scan it at 72 dpi.
Supplier No. 2: They tell me that in order to have a high quality image made from a photographic slide (starting with a 35 mm slide, in all cases), I need to have a “1280 pixel dimension slide, a JPEG, at 300 dpi, that is 8 MB per image.” However, this supplier also offers, on its list of services, a “Standard Resolution JPEG (4MB file/image – 3088 x 2048), as well as a “High Resolution JPEG (8 MB file/image – 3088x2048).
I will be presenting my Keynotes with my MacBook Pro, and will not have a chance to try out the presentations in advance, since the lecture location is far from my home, so that is not an option.
I do not want to use up more memory than necessary on my laptop. I also want to have the best quality image.
One more question: When scanning images myself, on my own scanner, for my Keynote presentations, would I be better off scanning them as JPEGs or TIFFs? I have been told that a TIFF is better because it is less compressed.
Any enlightenment on this subject would be appreciated.
Thank you.

When it comes to Keynote, I try and start with a presentation that's 1680 x 1050 preset or something in that range. Most projectors that you'll get at a conference won't project much higher than that and if they run at a lower resolution, it's better to have the device downsize your Keynote. Anything is better than having the projector try and upsize your presentation... you work hard to make it look good, and it's mangled by some tired Epson projector.
As far as slides go, scan them in at 150 dpi or better, and make them at least the dimensions of your presentation. Keynote is really only wanting 72dpi, but I do them at 150, just in case I need to print out the presentation as a handout later, and having the pix at 150 dpi gives me a little help with their quality on a printer.
You'd probably have to drop in the 150 versions again if you output the Keynote to .pdf or Word or something, but at least you have the option.
And Gary's right (above) go ahead and scan them as TIFFs. Sooner or later you'll want to do something else with these slides (like make something for an iPad or the like) and having them as TIFFs keeps your presentation looking good.
Finally, and this is a big one, get to the location for your presentation ahead of time if you can, and plug the laptop in and see what you get. There's always connection problems. Don't let the AV bonehead tell you everything will work just fine ('... I don't have any adapters for a Mac...') . See it for yourself... you're the one that's standing up there. Unless it's your boss, then you better be really sure it works.

Configure a DNS to use SCAN for Solaris VMs

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