For RAC experts -- OCFS2

GOOD MORNING!!!
Is correct the OCFS2 restart my LINUX when he can´t write on my storage ??
My STORAGE = OPEN FILER with ISCSI !
THANKS

I am wrong about the hangcheck timer.
The relevant FAQ to answer your question is at http://oss.oracle.com/projects/ocfs2/dist/documentation/ocfs2_faq.html#HEARTBEAT might help answer your question better
Specifically look at the addendum to the answer to Q.77

Similar Messages

GURUS-----How can any one proof he is a RAC expert

Hi,
In my recent interview with one of the top company they asked me "ARE YOU A RAC EXPERT" person who interviewd me was claiming he is an RAC expert.
How can I proof that I am a RAC expert.
If I know RAC installation on AIX/HP-UX/SUN and have good knowledge of RAC archicuture.
There is no certification for RAC also.
Thanks in advance.
Regards
MMU

First, I never proclaim myself an expert in anything. I always respond that while I may know a lot about a particular subject, it is up to others to label someone an expert or not. Then I state that while I may know a lot, there's always new technology to learn.
I think too many people self-proclaim themselves to be experts, when in reality, they are either more on the advanced or intermediate level. Proclaiming yourself an expert means you think you know all there is to know, and if you then answer a question incorrectly (or don't know an answer), you've suddenly disqualified yourself.

Shared Disks For RAC

Hi,
I plan to use shared disks to create Oracle RAC using ASM. What options do I have? OCFS2? or any other option?
Can some one lead me to a documnet on how can I use the shared disks for RAC?
Thanks.

javed555 wrote:
I plan to use shared disks to create Oracle RAC using ASM. What options do I have? You have two options:
1. Create shared virtual, i.e. file-backed disks. These files will be stored in /OVS/sharedDisk/ and made available to each guest
2. Expose physical devices directly to each guest, e.g. an LVM partition or a multipath LUN.
With both options, the disks show up as devices in the guests and you would then provision them with ASM, exactly the same way as if your RAC nodes were physical.
OCFS2 or NFS are required to create shared storage for Oracle VM Servers. This is to ensure the /OVS mount point is shared between multiple Oracle VM Servers.

How Do I Configure SSL for RAC Installation.

Experts,
Requesting your inputs on configuring SSL for my RAC environment.
- Oracle DB version is 11.2.0.2
- RAC is with two nodes.
- Two nodes are : rac1.oracle.com and rac2.oracle.com
- RAC setup has SCAN feature configured. SCAN FQDN : racscan.oracle.com
- All clients talk to RAC DB using SCAN feature as shown below.
client applications -> racscan.oracle.com ---> rac1.oracle.com
---> rac2.oracle.com
- tnsnames.ora file on both RAC instances has hostname as "racscan.oracle.com" instead of their individual phyiscal host names.
How do I configure SSL for RAC:
1. Do I need to generate certificate request for individual hostnames or only for SCAN hostname ?.
2. If I generate a certificate based on SCAN hostname, how does SSL work since SCAN hostname is not a phyiscal host name ?
3. What is recommended strategy for configuring SSL for RAC environment ?
Thanks

The documentation on the creation of Oracle Wallets is not specific to RAC, and the RAC SCAN instructions for TCPS are very vague on the specific requirements for the certificates required in the wallets for proper operation. I too am struggling to get it to work. Does anyone have a more technical guide to the specific configuration of the certificates needed and what specific configuration file changes need to be made?
Also, the self signed documentation is getting REALLY old. Oracle, please stop giving instructions that demonstrate irresponsibility and show the proper method of certificate requesting and importing to wallets.
Edited by: user11338513 on Mar 21, 2012 2:23 PM

Doubts about shared disk for RAC

Hi All,
I am really new to RAC.Even after reading various documents,I still have many doubts regarding shared storage and file systems needed for RAC.
1.Clusterware has to be installed on a shared file system like OCFS2.Which type of hard drive is required to install OCFS2 so that it can be accessed from all nodes??
It has to be an external hard drive???Or we can use any simple hard disk for shared storage??
If we use external hard drive then does it need to be connected to a seperate server alltogether or can it be connected to any one of the nodes in the cluster???
Apart from this shared drives,approximately what size of hard disk is required for all nodes(for just a testing environment).
Sincerely appreciate a reply!!
Thanks in advance.

Clusterware has to be installed on shared storage. RAC also requires shared storage for the database.
Shared storage can be managed via many methods.
1. Some sites using Linux or UNIX-based OSes choose to use RAW disk devices. This method is not frequently used due to the unpleasant management overhead and long-term manageability for RAW devices.
2. Many sites use cluster filesystems. On Linux and Windows, Oracle offers OCFS2 as one (free) cluster filesystem. Other vendors also offer add-on products for some OSes that provide supported cluster filesystems (like GFS, GPFS, VxFS, and others). Supported cluster filesystems may be used for Clusterware files (OCR and voting disks) as well as database files. Check Metalink for a list of supported cluster filesystems.
3. ASM can be used to manage shared storage used for database files. Unfortunately, due to architecture decisions made by Oracle, ASM cannot currently be used for Clusterware files (OCR and voting disks). It is relatively common to see ASM used for DB files and either RAW or a cluster filesystem used for Clusterware files. In other words, ASM and cluster filesystems and RAW are not mutually exclusive.
As for hardware--I have not seen any hardware capable of easily connecting multiple servers to internal storage. So, shared storage is always (in my experience) housed externally. You can find some articles on OTN and other sites (search Google for them) that use firewire drives or a third computer running openfiler to provide the shared storage in test environments. In production environments, SAN devices are commonly employed to provide concurrent access to storage from multiple servers.
Hope this helps!
Message was edited by:
Dan_Norris

Please read my question carefully, this is, I think, a question for the experts. It's not the usual name change question. When I setup my new MacBook Pro, something slipped by me and my computer was named First-Lasts-MacBook-Pro (using my real first and

Please read my question carefully, this is, I think, a question for the experts. It's not the usual name change question.
When I setup my new MacBook Pro, something slipped by me and my computer was named First-Lasts-MacBook-Pro (using my real first and last name).
I changed the computer name in Preferences/Sharing to a new name and Preferences/Accounts to just be Mike. I can right click on my account name, choose advanced, and see that everything looks right.
However, If I do a scan of my network with my iPhone using the free version of IP Scanner, it lists my computer as First-Lasts-MacBook-Pro! And it lists the user as First-Last.
So even though another Mac just sees my new computer name, and my home folder is Mike, somewhere in the system the original setup with my full name is still stored. And it's available on a network scan. So my full name might show up at a coffee shop.
Can I fully change the name without doing a complete re-install of Lion and all my apps?

One thought... you said the iPhone displayed your computer's old name? I think that you must have used the iPhone with this computer before you changed the name. So no one else's iPhone should display your full name unless that iPhone had previously connected to your Mac. For example, I did this exact same change, and I use the Keynote Remote app to connect with my MacBook Pro. It would no longer link with my MacBook Pro under the old name, and I found that I had to unlink and then create a new link under the new name. So the answer to your question is, there is nothing you need to do on the Mac, but rather the phone, and no other phone will display your full name.

How can I have a collective AWR report for RAC database in 10gR2 and 11gR1?

Plz correct me here
awrrpt.sql takes the snapshot at the instance level and incase we have 5 instances we have to take 5 awr reports for a particular period.correct???
If above is true ,any wayout to collect a single collective AWR report for RAC database which includes information on all the instances in Oracle 10g R2 or 11gR1 ?
Thanks in advance
Gagan

I have never come across a way for this. though I can n't say it is not there.
But I guess it may not be feasible too becuase as we know the current AWR report contains data which is specific for one instance.
Various hit ratios, top events, instance effeciency reports.... what not ..
It would be really nice to see something is a new format where it lists values from each instance in a single report.. I guess such a thing Does not exiist as of now.

Urgent help needed in configuring X1151A for RAC cluster

for RAC requirements I have to configure this card to use the interface name of ce1 but I have tried changing slots and puting /etc/hostname.ce1 file out there but it fails .. it always comes up as ce0.
my question is : How can I cofigure this card to come up as ce1 ? in the other box I had to do nothing .. i just placed the /etc/hostname.ce1 file with hostname and it works perfect.
can you please email me a copy of your response at [email protected] ?
thanks
Sami

Look for "ce" instances in the /etc/path_to_inst file. You'll need to change the lines so that the hardware path you want is "1".
Keep a backup and write down the pathname. You can give that path to a 'boot -a' prompt if anything bad happens.
Darren

Error for rman for RAC db

Copyright (c) 1982, 2007, Oracle. All rights reserved.
connected to target database: TEST (DBID=485988764) connected to recovery catalog database
RMAN> run {
2> resync catalog;
3> allocate channel oem_backup_disk1 type disk
4> format '/misc/OraBackup/TEST/%d_ARCH_%T_%t_%s';
5> allocate channel oem_backup_disk2 type disk
6> format '/misc/OraBackup/TEST/%d_ARCH_%T_%t_%s';
7> backup as COMPRESSED BACKUPSET tag=Nov100921
8> archivelog all not backed up 2 times;
9> release channel oem_backup_disk1;
10> release channel oem_backup_disk2;
11> }
12>
starting full resync of recovery catalog full resync complete
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of allocate command at 11/10/2009 09:22:07
RMAN-06004: ORACLE error from recovery catalog database:
ORACLE error from recovery catalog database:
This is the error for RAC database. This error is because if i include recovery catalog in the script. if there is no recovery catalog then it is working fine.

run {
allocate channel oem_backup_disk1 type disk format '/misc/OraBackup/TEST/%d_ARCH_%T_%t_%s';
backup as COMPRESSED BACKUPSET tag=Nov100921 archivelog all not backed up 2 times;
release channel oem_backup_disk1;
it worked successfully.
if i run like this keeping it in script
run {
resync catalog;
allocate channel oem_backup_disk1 type disk
format '/misc/OraBackup/${3}/%d_ARCH_%T_%t_%s';
allocate channel oem_backup_disk2 type disk
format '/misc/OraBackup/${3}/%d_ARCH_%T_%t_%s';
backup as COMPRESSED BACKUPSET tag=$TAG
archivelog all not backed up 2 times;
release channel oem_backup_disk1;
release channel oem_backup_disk2;
then i will get the error
Copyright (c) 1982, 2007, Oracle. All rights reserved.
connected to target database: TEST (DBID=485988764) connected to recovery catalog database
RMAN> run {
2> resync catalog;
3> allocate channel oem_backup_disk1 type disk
4> format '/misc/OraBackup/TEST/%d_ARCH_%T_%t_%s';
5> allocate channel oem_backup_disk2 type disk
6> format '/misc/OraBackup/TEST/%d_ARCH_%T_%t_%s';
7> backup as COMPRESSED BACKUPSET tag=Nov100921
8> archivelog all not backed up 2 times;
9> release channel oem_backup_disk1;
10> release channel oem_backup_disk2;
11> }
12>
starting full resync of recovery catalog full resync complete
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of allocate command at 11/10/2009 09:22:07
RMAN-06004: ORACLE error from recovery catalog database:
ORACLE error from recovery catalog database:

What is acceptable level of Private Interconnect Latency for RAC

We have build 3 Node RAC on RHEL5.4 on VMware.
There is node eviction problem due to loss of Network Heartbeat.
ocssd.log:[ CSSD]2010-03-05 17:48:21.908 [84704144] >TRACE: clssnmReadDskHeartbeat: node 3, vm-lnx-rds1173, has a disk HB, but no network HB, DHB has rcfg 0, wrtcnt, 2, LATS 1185024, lastSeqNo 2, timestamp 1267791501/1961474
Ping statistics from Node2 to Node1 are as below
--- rds1171-priv ping statistics ---
443 packets transmitted, 443 received, 0% packet loss, time 538119ms
rtt min/avg/max/mdev = 0.150/2.030/630.212/29.929 ms
[root@vm-lnx-rds1172 oracle]#
Can this be reason for Node eviction? What is acceptable level of of private interconnect latency for RAC ?

What is acceptable level of of private interconnect latency for RAC ?Normal local network latency should be enough. By the way latency settings are very generous.
Can you check if your to-be-evicted node runs and is reachable when seeing the node eviction messages?
In addition to that: Can you check the log files of the eviced node. Check for time stamps around "2010-03-05 17:48:21.908". Make sure all systems are NTP synchronized.
Ronny Egner
My Blog: http://blog.ronnyegner-consulting.de

Oracle White Paper- Storage Option for RAC. on Linux

hi..
This in reference with White Paper.. Stotage Option for RAC on LINUX. Author- Umadevi Byrappa.
Which states on page 10: To Use NAS for RAC database file storage select the file system storage option in OUI. or the Clustered file system storage option in DBCA.
With which i disagree. File storage option of oracle 10g RAC only shows.
1. Clustered File system.
2. ASM
3. Raw Devices.
When i try to select Cfs and select the shared directory on NFS it says. < Directory_Name> is not a clustered file system or Shared on Both <Server_1> < Server_2>. and at this point of time i m stuck.
1. I dont want to use OCFS as its not supporting NAS.
2. Selecting CFS doesnt recognise mounted shared volume as valid storage device option can only store OCRfile and CSS file.
3. So, I have to use ASM.. with zero padded files..which i dont want to because no other option. ( PART NO. B10766-02 PAGE C-6)
Also, I would like oracle to provide Back up Recovery Option or Document which tells me how could i Recover Database when i use Zero Padded Files.
What would be the best Option in the above scenario ?
I hope by applying patch or with workaround somehow it shows Filesystem ONLY.I'll be the happiest man in this Case.
Any suggestions and corrections are most welcome. I wish i m wrong.
Nadeem ( [email protected] )

NFS isn't a clustered file system at all - by RFC it is an exported file system with access controls
If your vendor offers an NFS solution over and beyond that - more power to them. However that isn't "NFS"..
http://www.faqs.org/rfcs/rfc3010.html
You can use NFS in a clustered server environment (to mount apps, read only data and for synchronous access to files), however it doesn't support the concurrency out of the box for RDBMS transactions - if a vendor is supporting this promise then that is for you to decide.
However i stand by my statement that NFS is a file system exported across your network and not a full clustered file system.

Looking for best practice / installation guide for grid agent for RAC

I am looking for best practice / installation guide for grid agent for RAC, running on windows server.
Thanks.

Please refer :
MOS note Id : [ID 378037.1] -- How To Install Oracle 10g Grid Agent On RAC
http://repettas.wordpress.com/2007/10/21/how-to-install-oracle-10g-grid-agent-on-rac/
Regards
Rajesh

Is a gateway mandatory for RAC environment?

Question:
Is a gateway mandatory for RAC installation, general on RAC environment?
*..when yes, why?*
Many thanks
I make this test with my only one RAC node
1. Run with gateway:
[oracle@linux1 ~]$ crs_stat -t
Name           Type           Target    State     Host
ora....SM1.asm application    ONLINE    ONLINE    linux1
ora....X1.lsnr application    ONLINE    ONLINE    linux1
ora.linux1.gsd application    ONLINE    ONLINE    linux1
ora.linux1.ons application    ONLINE    ONLINE    linux1
ora.linux1.vip application    ONLINE    ONLINE    linux1
ora.orcl.db    application    ONLINE    ONLINE    linux1
ora....l1.inst application    ONLINE    ONLINE    linux1
ora....test.cs application    ONLINE    ONLINE    linux1
ora....cl1.srv application    ONLINE    ONLINE    linux1
[oracle@linux1 ~]$ srvctl status database -d orcl
Instance orcl1 is running on node linux1All thing seem correct!
2. run without gateway (blank setting):
[oracle@linux1 ~]$ crs_stat -t
Name           Type           Target    State     Host
ora....SM1.asm application    ONLINE    OFFLINE
ora....X1.lsnr application    ONLINE    OFFLINE
ora.linux1.gsd application    ONLINE    ONLINE    linux1
ora.linux1.ons application    ONLINE    ONLINE    linux1
ora.linux1.vip application    ONLINE    OFFLINE
ora.orcl.db    application    ONLINE    OFFLINE
ora....l1.inst application    ONLINE    OFFLINE
ora....test.cs application    ONLINE    OFFLINE
ora....cl1.srv application    ONLINE    OFFLINE
[oracle@linux1 ~]$ srvctl status database -d orcl
Instance orcl1 is not running on node linux1Something is false!

By default, the server's default gateway is used as a ping target during the Oracle RAC 10g VIP status check action.
Upon a ping failure, Oracle will decide that the current interface where the VIP is running has failed, and will initiate
an interface / internode VIP failover.
In above case, we used just one node for CRS installation, so the VIP coudn't failover to other nodes and thus reported additional error like :
CRS-1006: No more members to consider
CRS-0215: Could not start resource 'ora.dbtest2.vip'.
Try ->
A parameter FAIL_WHEN_DEFAULTGW_NOT_FOUND in the file
$ORA_CRS_HOME/bin/racvip to address this problem.
The following steps will fix the VIP starting problem for above mentioned scenario.
1- stop nodeapps
2- As root,
vi the script $ORA_CRS_HOME/bin/racgvip and change the value of
variable FAIL_WHEN_DEFAULTGW_NOT_FOUND=0 .
3- start nodeapps and you should see the resources ONLINE
You may proceed with netca and dbca to create a RAC database after this.

NETCA listener configuration error for RAC database

Hi,
WE have a RAC setup on 2 nodes and now we want to change the default listener port for RAC database.
Database ver: 10.2.0.4
We now that srvctl does not work to add listener manually to CRS.
We are now using netca to create new listener on both the RAC nodes but it gives error throwing :
Problem in configuration : Node(S): hostname
Try again...
When we try to start the listener say listener_I it throws following error:
Problem in configuration :node1
Listener start to failed:Listener may already be running
CRS-0215:Could not start resource
This is urgent
any help is appreciated.
Regards,
Milan

user12073248 wrote:
How you fix it? write to [email protected]
Hi Mauricio,
In this forum we help for free regardless of priority.
First you try to help in the forum if the author of the post request your e-mail you give to him.
Hope you understand it.
Thanks in advance for doing your part to make this community as valuable as possible for everyone!
Levi Pereira

May i go for sql expert(1Z0-047) exam or 11g sql fundamentals 1(1Z0-051)

Hi all,
Please suggest me, may i go for sql expert(1Z0-047) Test or 11g sql fundamentals 1(1Z0-051) Test with
oracle Administration 1(1Z0-042) Test.
Which will be the best option.
Thanks & Regards

You may use either exam along with the Oracle Administration 1 (1Z0-042) exam if your goal is to get a 10g DBA OCA credential.
The SQL Expert exam is quite a bit more challenging than the SQL Fundamentals exam. On the other hand, the SQL Expert exam gives you a separate SQL Certified Expert credential. If you can pass it, you should take the SQL Expert exam.
Justin

For RAC experts -- OCFS2

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