Is Oracle VM HA failover supposed to be transparent to guests?

I've been struggling with HA now for days and couldn't figure out why I lose all my guest sessions during failover, despite the fact that my Server Pool must be set up OK because I can do Live Migration (emphasis on the Live) no problems and my guests keep running.
A horrible thought occurred to me though - maybe it IS working and this is the best I can get!!
So the question is - has anybody else set up an HA-enabled Server Pool in Oracle VM 2.2 and managed to crash the server the guests are running on and have them re-appear on the other server without losing current network sessions to the guests?
Am I expecting too much of OVM HA?
This is how I believe other HA solutions work (RHCS, VCS, Serviceguard etc etc)
P.S. When I say I lose my guests during failover, I mean they shut down and come up again on the other node but all processing and all sessions are obviosuly lost - so not "high availability" in my book. It also seems to take a very long time to do this - I've never cared to time it but I'm guessing it's around 20 minutes. I'm using an NFS shared disk btw.

You right :(
I am at a client and I am doing a big implementation of oracle vm, oracle rac and apps. When a oracle vm server crash, we had some storages issues, the guest will start up on the other oracle vm server. The guest will boot, so you will lose all sessions.
Live migration will only help you if you know of an disaster waiting to happen or if you can see the future ;) But it is handy for doing server maintenance.
Ciao
Nardus

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Oracle Database down /failover clause ?

hi
I am collecting the information regarding oracle database down / failover clouses , so all of you requested kindly send me your experience regarding Oracle database down/failover reason/clause.
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regards

Hi,
Are you looking for notes or scenarious.
If you are looking for some notes follow the below link:
http://pavandba.wordpress.com/category/dataguard/
Thanks,
Rafi.

Oracle RAC installation failover

Hi,
I have an Oracle RAC installation with 2 nodes with the data stored on a shared OCFS partition. I had a client test the connection using jdbc string for RAC failover. I tried shutting down one of the nodes on the RAC installation and the client could not connect to the oracle cluster database for the next 5 to 10mins.
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Thanks for any advice.

Hi,
Server side failover is arranged by setting the remote_listener parameter.
Client side failover is set by using T(ransparent) A(pplication) F(ailover) (9i and higher)
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Sybrand Bakker
Senior Oracle DBA

Oracle VM Server 2.2.1 as VM Ware Guest

Hi,
I have download and installed Oracle VM Server 2.2.1 and Oracle VM Manager 2.2.0 in a VM ware virtual machine.
After installing Oracle VM Manager i wanted to access https://127.0.0.1:4443/OVS, for that i tried changing to GUI, but its not working.
I have researched and found out that "Oracle VM Server is a bare-metal product. You cannot install it as a VMware guest."
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Ok, i have figured it out taht i have use another system to access the oracle vm server.
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Background is supposed to be transparent - but its not!

I am doing an NTSC DV project, 720x480.
Its just a simple lower 3rd.
When I right click the background Project Properties... its says "transparent" (not "solid") for background which is what I want.
However, when I export, I export as Apple ProRes 422 HQ NTSC (which I find is best quality).
When I import it into FCP, the background is SOLID black. So the transparency is being lost.
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Hmmm, just tried Animation... still black. :s
Here's my presets:
Project is NTSC DC
Project properties:
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W,H: 720x480
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Compressor: Animation
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Frame rate: 29.97
Key frame rate: 0
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Resolution 7820x480
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Do I need to change OCI layer to utilize Oracle RAC failover Feature?

Dear Oracle Experts,
From the Oracle documents, the RAC is a great feature providing the scalability and high availablility. I thought the failover features should be transparent to users.
However, from this book:
http://www.oreilly.com/catalog/oressentials2/chapter/ch01.html
"For instance, in high-availability implementations in which multiple systems share disks and implement Real Application Clusters/Oracle Parallel Server, you may want users to reattach to a second server transparently if the first fails. You can write programs that do this using OCI. "
"You can write applications with the Oracle Call Interface (OCI) to provide failover to a second instance transparently to the user. "
I am confused if RAC failover feature have to depend on OCI user application coding?
I have an application developed over Oracle 8.1.6, if I buy Oracle9i to use RAC failover feature, should I modify my application at OCI layer to make it work? Can I switch the oracle instance when the original one fails only by RAC setup instead of changing OCI code?
Thanks.
Wei
P.S. I am running application over Compaq tru64 5.1A.

Hi ,
As answered by Sumit u need not alter ur application for shifting it to RAC.But there are few things which will determine the perfoemance of your application on RAC and depend on the type of application u use .Application partioning,data partitioning,index partitioning ... look for these topics . This may help.
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Gud Luck!
Vijay Shanker
Edited by: Vijay Shanker on Feb 14, 2009 6:12 PM

How to deploy oracle 11g under cold failover cluster

Hi,
I am trying to install oracle 11g under failover cluster environments. I am trying to find some oracle documentation about it. But not able to find one. Can anyone help me. Please i need it badly.
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Also is it wise to install 11g warehouse with fail safe or use RAC.
regards
Nick
Edited by: Nick Naughty on Feb 1, 2009 4:02 AM

thanks alot for reply.
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regards
Nick

Problem when trying to refresh oracle screens with latest data

hello experts,
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base.
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now the second screen will appear and the detail of the employee will be displayed.
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Hi,
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how did you populate the datablock in the second form ?
Typical solution would be:
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In Form 1, transfer the primary key-value of the current record to a global or parameter (will use global in my example):
e.g. you have a WHEN-BUTTON-PRESSED-Trigger with the following code:
<pre>
:GLOBAL.EMPNO:=:EMP.EMPNO;
CALL_FORM('FORM2');
</pre>
In Form 2, you have a WHEN-NEW-FORM-INSTANCE-Trigger with code:
<pre>
DEFAULT_VALUE('GLOBAL.EMPNO', NULL);
IF :GLOBAL.EMPNO IS NOT NULL THEN
GO_BLOCK('EMP');
EXECUTE_QUERY;
:GLOBAL.EMPNO:=NULL;
END IF;
</pre>
On block EMP in Form 2 there is a PRE-QUERY-Trigger with following code:
<pre>
IF :GLOBAL.EMPNO IS NOT NULL THEN
:EMP.EMPNO:=:GLOBAL.EMPNO;
END IF;
</pre>
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<pre>
:GLOBAL.EMPNO:=:EMP.EMPNO;
GO_BLOCK('EMP');
EXECUTE_QUERY;
:GLOBAL.EMPNO:=NULL;
</pre>
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Ant oracle:compileJsp errors in JDeveloper 10.1.3.5 with PolicyClassLoader

Hi,
I am developing ant script to build and ADF 10g application through jDeveloper 10.1.3.5 and then later we'll running it on the app server.
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regards - rutwik

There is a workaround for this issue.. instead of using standard <tt>oracle:compileJsp</tt> task you can do the following:
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How to set up external storage in Oracle VM?

Hi,
We have oracle VM server 2.1.2 installed with the Oracle DB vm, and will need the Oracle DB access the external storage for better I/O perf. We'd need to install SAS Raid controller driver and Raidman software to configure the storage array, firstly, my understanding is that we can't install the dirver and sw to a virtual machine(oracle db vm) but would need to install them on the Oracle VM server, then create raw disk file on it and add it into the disk parameter in the "vm.cfg", after restart the oracle db vm, we suppose to be able to format and create partition in the oracle db vm. Please let me know if my understanding of configuration procedure as above is correct.
Second question is: Do we suppose to download driver and Raidman software for the RedHat Enterprise Linux 5 platform? Can the driver/sw versions on the Redhat enterprise linux 5 be used on Oracle VM server 2.1.2?
Thanks in advance for your reply.
Jenny

If you are using OVM without a support license, you can try building the drivers from source. If you do have support for OVM, then open a Metalink SR to request the drivers you need. Adding drivers that were not originally included with OVM or provided for your OVM version by Oracle will void your support.

PDF Compression in Oracle Reports

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JDBC URL for Two Oracle Nodes

Hi All,
I have two DB nodes which are running independently (Mean no RAC), I want to configure JDBC URL for these nodes that if one node goes down my application automatically connected to second one.
Both nodes have different HOST and SID.
Regards,
imran

Hi jwenting,
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imran

Oracle VM 3.1.1, Oracle VM Server, PeopleSoft Templates and networking

I have installed Oracle VM Manager on an Oracle Linux x86_64 system, all freshly installed, and two Oracle VM Server 6 systems also freshly installed. These three servers are each connected to two networks. One is a 192.168.15.0/24 ("net-A"), and the other is 10.8.15.0/24 ("net-B"). net-B also has the fileserver for the repositories et al directly attached. "net-A" is connected to the outside world. This is all working great; all servers can intercommunicate, can be reached from other devices on each network, et cetera. I can ssh from any machine on the network to these machines, and vice versa. All servers correctly use the internal and the external DNS, and can communicate with Google, et cetera. Excellent!
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My Oracle VM network is super simple at present: There is exactly one network ("ps-net"), and it runs all five network channels (server management, live migrate, storage, etc.). Both servers are on this network, and the NIC used is the "net-B" NIC. There is no VLAN, and the IP addresses are set by DHCP. Bonding, the configuration display says, is Not applicable. Since these devices are on the same NIC as "net-B," I provided the 10.8.15.x network information when prompted, and assigned them fixed IP addresses on that network. For "gateway," I specified the address of the VMM, not knowing what else to use. And, as I said, these VM don't talk to anything, not even to each other.
My needs are very simple. The shame is I've built all this up for the express purpose of running those two templates, and it's been a battle, to say the least, to get this far. Who can point me to the error of my ways, or a better way to accomplish this end?
Thanks for your time, and for reading this far!

OK. Out of desire to resolve this, I have completely removed the 192.* network from this configuration, by disconnecting the eth0 networks, and changing the ifcfg-eth0 to ONBOOT=no (yes, I know either action should suffice).
So there is exactly one network involved now. (Greg King said that's OK, if scalability is not an issue, and if he said it, I believe it. I'll complicate it later, after I get simple working.) And one VMS is out of the configuration for now. So I have ora-vmm at 10.8.15.49 ora-vms1 at 10.8.15.47, and the fileserver at 10.8.15.50. ora-vms2 is at 10.8.15.48, but is down for now. The server pool address is set to 10.8.15.1. The network looks like this:
ID: 10.8.15.0
Name: ps-net1
Channels: all
Servers: ora-vms1, ora-vms2
Selected paths: ora-vms1 Port (2) (eth1), ora-vms2 Port (2) (eth1)
VLAN Group: None
VLAN Segment: None
Configure IP Address: ora-vms1 Port (2) (eth1) Use DHCP 10.8.15.47 255.255.255.0 Bonding: N/A
Configure IP Address: ora-vms2 Port (2) (eth1) Use DHCP 10.8.15.48 255.255.255.0 Bonding: N/A
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eth1 Link encap:Ethernet HWaddr 00:0C:29:38:92:7E
inet addr:10.8.15.49 Bcast:10.8.15.255 Mask:255.255.255.0
inet6 addr: fe80::20c:29ff:fe38:927e/64 Scope:Link
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RX packets:3516 errors:0 dropped:0 overruns:0 frame:0
TX packets:3186 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:1520847 (1.4 MiB) TX bytes:383384 (374.3 KiB)
eth2 Link encap:Ethernet HWaddr 00:0C:29:38:92:88
inet addr:10.8.16.1 Bcast:10.8.16.255 Mask:255.255.255.0
inet6 addr: fe80::20c:29ff:fe38:9288/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:13 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 b) TX bytes:830 (830.0 b)
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:136683 errors:0 dropped:0 overruns:0 frame:0
TX packets:136683 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:30853824 (29.4 MiB) TX bytes:30853824 (29.4 MiB)
ifconfig from ora-vms1
10.8.15.0 Link encap:Ethernet HWaddr 00:0C:29:D5:97:F1
inet addr:10.8.15.47 Bcast:10.8.15.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:21463 errors:0 dropped:1 overruns:0 frame:0
TX packets:23017 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:10033833 (9.5 MiB) TX bytes:12175262 (11.6 MiB)
10.8.15.0:0 Link encap:Ethernet HWaddr 00:0C:29:D5:97:F1
inet addr:10.8.15.1 Bcast:10.8.15.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
eth1 Link encap:Ethernet HWaddr 00:0C:29:D5:97:F1
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:47343 errors:0 dropped:0 overruns:0 frame:0
TX packets:48885 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:23261224 (22.1 MiB) TX bytes:22212168 (21.1 MiB)
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:5858 errors:0 dropped:0 overruns:0 frame:0
TX packets:5858 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:2749072 (2.6 MiB) TX bytes:2749072 (2.6 MiB)
I don't understand why, but the VMM has placed this entry into each server's /etc/sysconfig/network-scripts directory:
ifcfg-10.8.15.0
Contents are:
#This file was dynamically created by OVM manager. Please Do not edit
DEVICE=10.8.15.0
TYPE=Bridge
BOOTPROTO=dhcp
ONBOOT=yes
DELAY=0
I am able to start the guest with no issue. It has been configured with IP address 10.8.15.101, netmask 255.255.255.0. Its gateway is 10.8.15.50, the same network configuration as all the other servers.
The important parts of ifconfig output from the guest (which I must manually type since Launch Console provides no copy/paste functionality) are:
eth0 Ethernet, HW Addr: 00:21:f6:00:00:11
inet addr: 10.8.15.101 Bcast: 10.8.15.255 Mask: 255.255.255.0
inet6 ...
UP BROADCAST RUNNING MULTICAST ...
RX Packets: 11 errors:0 dropped:0 overruns:0 frame:0
TX Packets: 101 errors:0 dropped:0 overruns:0 carrier:0
RX bytes:620 (620.0 b) TX bytes:10592 (10.3 KiB)
Interrupt:14
Ping to 10.8.15.47 (the server on which this guest is running) is successful
All other ping attempts fail.
This is where I am, and why I'm confused. Can anyone help me understand why this guest can only talk to its "host?"
Thank you.

Shrinking BLOB tablespace in Oracle 10g

Hello,
I have table created with 32 GB in Oracle 10g with BLOB field containing images. after that I have deleted some of the images from the table but when I'm checking free space, it is show full 32 GB. But when I'm looking at Toad it shows me out of 32 GB 17 GB is free.
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Hello urgent,
Tablespace management is not really an Oracle Spatial topic, I suppose these are georaster images?. You probably want to search and post in the more general database forums.
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Cheers,
Paul
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Hi,
I have created an Oracle Procedure which is supposed to fetch a record as per the input parameter passed.
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SELECT DISTINCT col1 FROM my_tab WHERE col2 = 'Input parameter'
Few of the input parms (col2) has more number of records (col1) and so the procedure gives an error like -
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Thank you!

It still gives me the same error when it encounters more than one output.Yes, I'm sure it does.
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Is Oracle VM HA failover supposed to be transparent to guests?

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