Clustered ASM question

Can you have clustered ASM instance (RAC) with 2 nodes, but each node to use local storage only (local disks only) and somehow share it with other node?
Hope question is clear enough.
Let's say I have two physical machines but no money for anything attached (NAS,SAN,NFS). Just those two machines and make them somehow clustered ASM storage.
Sorry for asking stupid questions ... still newbe
10gR2 + Linux x86

I am not aware of anything like that. BUt for testing purpose you can use whats called an openfiler...below is out of the doc
Powered by rPath Linux, Openfiler is a free browser-based network storage management utility that delivers file-based Network Attached Storage (NAS) and block-based Storage Area Networking (SAN) in a single framework.
http://www.oracle.com/technology/pub/articles/hunter_rac10gr2_iscsi.html

Similar Messages

How to change an ASM single-instance into a clustered ASM ?

Hi,
I have a node#1 with Oracle10gR2 installed (standard installation, not RAC).
Everything is in the ORACLE_HOME.
A unique single-instance database DB1 uses ASM#1 to access a diskgroup on a SAN.
I'd like to install Clusterware in a separate CRS_HOME (within the oracle account), and protect ASM#1 and the database DB1 using an application VIP.
The things is: I want to create another single-instance database DB2 on another node#2, with another ASM#2 instance.
I need a clustered ASM (with Clusterware) installation to do that because ASM#1 and ASM#2 need to access the same diskgroup.
I don't want to lose the existing data & configuration of the ASM#1 instance.
What modifications I need to do in the current ASM#1 instance on node#1 to make it Clusterware-aware ?
(Again, it's not a RAC installation...)
Thanks

Hi,
I finally found this Metalink Note 452758.1, which describe the procedure....
Any feedback about this ?

Windows Clustering Networks question...

Hi all;
This is my scenario:
I have installed Windows Server 2012 on two servers. Then enabled Windows Clustering feature on it. The shared storage is based on Fibre Channel technology. Each server has 4 NICs and I have splitted them as followis:
One NIC for remote mangement of the servers with the range of 172.16.105.0/24.
One NIC dedicated for heartbeat communication.
Two NICs has been bundled together with NIC Teaming feature of the operating system.
But as you see in the following figure there are 4 Cluster Network links:
Is it normal?
Thanks
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DataGuard and ASM Question

I want to implement Dataguard between non-asm instances. My question is how to move data from non-asm to asm box.
Thanks,

Sure. The location of the data files is irrelevent to DataGuard-- DataGuard is only concerned with the change vectors (i.e. the redo information).
Justin

Oracle 10gR2 RAC - ASM question

Hi
I have a question regarding the ASM storage. Let says I have a system here running Oracle 10gR2 RAC and would like to add a new/extend the current DATA disk group with more disk space. How do I do that? will it affect the existing data stored inside there?

So to add a little more to the discussion. Let's say your storage administrator presents you a LUN and is nice enough to add a partition of say 7G. (/dev/sdo1).
Now you need to take /dev/sdo1 stamp it and alter your storage group.
For illustration purposes I shall use rac1 and rac2 as my dual instance RAC and add to the asm group ARCH.
As root on rac1
/etc/init.d/oracleasm createdisk ARCH2 /dev/sdo1
then run
/etc/init.d/oracleasm listdisks
to make sure ARCH2 shows up.
On rac2 you run
/etc/init.d/oracleasm listdisks
You don't see ARCH2 so then run
/etc/init.d/oracleasm scandisks
then
/etc/init.d/oracleasm listdisks
Now you should see ARCH2
Ok the asm stamps are in sync now.
Back to rac1
su - oracle
set ORACLE_SID to asm instance and use sqlplus
sqlplus / as sysasm
If you query V$ASM_DISK you will see your disk with a header_status of PROVISIONED
that's good ...
NOw while still in sqlplus
Let's bump up the asm_power_limit so rebalancing runs faster
alter system set asm_power_limit=5 scope=both ;
If your asm instance are sharing the same spfile you only need do this on one instance; otherwise run the command both on all asm instances.
Lastly
ALTER DISKGROUP ARCH ADD DISK 'ORCL:ARCH2' ;
Now you can query V$ASM_OPERATION and watch ASM do it's magic of rebalancing.
That's it. All done while the DB is up and running.
How does that work for you?
-JR jr

ASM question for Diskgroup not complete

Hi guys
Currently i am trying to solve a problem that is created by me in order for me to handle a real scenario. For example, there are three failgroups and each failgroup has 3 disks in window environment(VMWARE).
Diskgroup DATA
Failgroup 1: A, B and C
failgroup 2: D, E and F
failgroup 3: G, H, I
When i removed drive I (simulate a hard disk failure), the DATA diskgroup would not mount. If i tried to mount the diskgroup DATA, i would receive an error message like "DISKgroup not complete, ASM disk 6 and 4 missing". If i added a new disk for example T, i would receive an error message such as "diskgroup DATA does not exist or is not mounted". But if i added the disk I back, i would able to mount the DISKGROUP. Can anyone tell me how i can deal with this kind of situation without adding back the old disk I ?

Hi
I am not too sure about how ASM is able to handle disk failure
For example in ASM confiiguration :
Diskgroup DATA (Normal redundance) consists of 3 Failgroups:
Failgroup 1: A, B and C
failgroup 2: D, E and F
failgroup 3: G, H, I
Now lets assume Disk I fails. For ASM configuration, Data will be rebalanced within the Failgroup 3 to keep up normal redundancy. By right, the database is still online and is able to handle users.
But for my case:
When i removed drive I (simulate a hard disk failure) and start up the instance, the diskgroup would not mount. If i tried to mount the diskgroup DATA, i would receive an error message like "DISKgroup not complete, ASM disk 1 missing". ---> At this point, I thought ASM should able to handle disk failure and the diskgroup should be able to handle missing disk.
But if i added the original disk I back and start the vmware, i would able to mount the DISKGROUP. I was trying to make sure ASM configuration can handle disk failure.
How can i be too sure that ASM instance is able to handle disk failure if DISK I fails --->

ASM Question

Just want to get an idea of how people are configuring the underlying disks with ASM. I've seen multiple studys/articles/etc showing very little difference between using RAID1 and RAID10, ASM doesn't seem to care. My storage admin is giving me some pushback b/c at RAID1 (whole disks), he has a RAID group for each LUN that I want to use, so with 20 disks (20 mirrors), he has to create 20 RAID groups/LUNs, he would rather just put all 40 disks into a RAID10 group and create 1 massive LUN to present to ASM. I don't think ASM cares either way, it's a matter of letting the SAN stripe (RAID10) or letting ASM stripe (RAID1). Anybody give me some real world examples of what you're doing or have seen customers doing? Thanks.

Well your controlfiles are in right place. Oracle created a link "+TUNOP_DISK_GROUP_001/LETO/control01.ctl " which is the filename specified in init.ora to point to "control01.ctl => +TUNOP_DISK_GROUP_001/LETO/CONTROLFILE/Current.256.585244865" which is the actual filename in ASM instance.
Read oracle doc for more on asm aliases.
Daljit Singh

Weblog 6 Clustering basic question

I am trying to setup Weblogic ver 6.0 Clustering on my Windows NT machine.
          From the weblogic console i created a Cluster, which has the IP address of
          my machine, and given it some name MyCluster.
          I have not given any Multicast IP address to it.
          On the left hand pane : For my servers under Servers/exampleServer
          On the right hand pane :
          I go to Configuration/Cluster window and choose MyCluster for the cluster
          field for my Server exampleServer.
          And click Apply.
          This results in error messages in my Weblogic command line window with lots
          of NullPointerExceptions etc...
          Have i missed any step here ?
          Can any one please give me a step by step guide to creating a Cluster, and
          then adding server (instances ?) to it.
          Do i need more than one IP address (i guess...) ?


          A cluster needs at least TWO IPs (2 IPs in 1 PC or 2 PCs).
          Your IP for cluster should be like 1.1.1.1,1.1.1.2 or cluster.domain
          with two IPs assigned to it.
          That should be why you got NullPoint for the missing 2nd IP.
          You might follow my attached ReadMe.doc and modify my sample config.xml
          for both machines/locations (use same config.xml on the two), modify
          my startExamplesCluster.cmd (for master), startExamplesSlave.cmd
          (for slave) and setExamplesEnv.cmd (for both) to fit yours, and
          try.
          config.xml has all the result you can make in console.
          Cluster feature in WL6 is far from perfect, don't guess the ideal
          possibilities all the time.
          Good luck!
          Steven
          "JSB" <[email protected]> wrote:
          >I am trying to setup Weblogic ver 6.0 Clustering on my
          >Windows NT machine.
          >
          >From the weblogic console i created a Cluster, which has
          >the IP address of
          >my machine, and given it some name MyCluster.
          >I have not given any Multicast IP address to it.
          >
          >On the left hand pane : For my servers under Servers/exampleServer
          >On the right hand pane :
          >I go to Configuration/Cluster window and choose MyCluster
          >for the cluster
          >field for my Server exampleServer.
          >And click Apply.
          >
          >This results in error messages in my Weblogic command
          >line window with lots
          >of NullPointerExceptions etc...
          >
          >Have i missed any step here ?
          >Can any one please give me a step by step guide to creating
          >a Cluster, and
          >then adding server (instances ?) to it.
          >Do i need more than one IP address (i guess...) ?
          >
          >
          >
          [startExamplesSlave.cmd]

MultiProcessor Clustering Architecture Question

Comments inlines.
          Cheers - Wei
          Jim Zhou <[email protected]> wrote in message
          news:[email protected]...
          > Wei,
          > When servlet calls ejb, if that ejb is deployed on four wls servers,
          > because the round-robin, only 25% of the chance the servlet and ejb are in
          > same JVM. Am I right on this?
          If your servlet and ejb are deployed on different clusters, the answer is
          yes.
          If they are on the same clusters, WLAS will call the ejb on the same local
          machine, if the call fails, that's the time load-balancing algorithms plays
          into the picture.
          Hope it helps.
          > What do you mean on "WebLogic rjvm will try to
          > call local remote object as much as possible."? How do achieve load
          balancing
          > if the servlet always get the local ejb to serve its request?
          > I have a client going to use 50 low-end Sun box as JSP/Servlet
          cluster,
          > 4~6 high-end Sun box as EJB cluster. Just curious how much performance
          penalty
          > I will get. Thanks.
          >
          > Jim Zhou
          > BEA Professional Service.
          >
          > Wei Guan wrote:
          >
          > > If I were you, I would like to create one cluster with four weblogic
          > > servers. Every server will serve both servlet and ejb. The benefits:
          > > 1) High availabilty and utlilization.
          > > 2) RMI calls between servlet and ejb will be optimized. WebLogic rjvm
          will
          > > try to call local remote object as much as possible. Save
          > > serizliation/deserilization overhead and communication cost.
          > > 3) Better load balancing.
          > >
          > > My 2 cents
          > > --
          > > Cheers - Wei
          > > bahar <[email protected]> wrote in message news:[email protected]...
          > > > Hello,
          > > >
          > > > I have a client who needs to cluster two Sun E420R (4 procesor)
          > > > machines.
          > > >
          > > > I have presented the following architecture for a cluster of two
          > > > machines running 5.1.0 and JDK 1.2.2:
          > > >
          > > > Three Apache WebServers are load balanced via a director. On the
          > > > Application Servers, I have created two clusters (on each machine) for
          > > > the servlets and EJBs. So, basically, each machine has two clusters
          > > > (web and ejb) with two JVMs. So, there are two members of the web
          > > > cluster and two members of the EJB cluster. The apache plugin
          contains
          > > > a comma delimited list of the IP addresses of the machines in the web
          > > > cluster.
          > > >
          > > > I have added a Multi-IP URL in the JNDI ProviderURL for the calls in
          the
          > > > Web Cluster to point to the list of servers in the EJB cluster
          > > > (comma-delimited list).
          > > >
          > > > The Http cluster uses In-Memory replication for HttpSessions.
          > > >
          > > > Is this a valid architecture that will support failover and
          clusterable
          > > > service load balancing? If not, what suggestions should I make?
          > > >
          > > > Thanks in advance.
          > > >
          >

Installation with ASM question

In reading one of the ASM install docs it says to install the OS and the Oracle home on the same drive. Is this really a requirement? The client is a windows shop, OS is Windows 2008 R1, Oracle 11.1.0.7. We want to install the OS on one drive and the Oracle home on another, will that cause issues for ASM?
Thanks in advance.

I do not think so. You should be able to install your ORACLE_HOME on a different partition or drive. Just out of curiosity: where exactly did you read this?
Bjoern

Clustering newbie questions

          Pls forgive some naivete as am new to clusters ... we have WLS 6.0 running an app
          clustered on 3 servers and we have problems crashing every other day and slow
          performance all the time. Platform is Win NT 4.0 SP4 with 640 MB RAM, using IIS
          as HTTP server, with BigIP F5 load balancer in front. This is a strange configuration
          to me and WLS 6.0/NT is pretty old I think ... but it's hard to know where to
          start looking for source of problems !!
          Can anybody pls help with general thoughts ? appreciate it ...
          thans in advance ...


Do you get any stack trace at the time of crash?
          For performance related issues - you will have to profile the application
          and understand where the most time is being spent. If its too slow , then
          may be even threaddumps can help identify what is happening. Generally you
          should have a test setup and some way of simulating the normal load on the
          application and thats where you should profile the application with some
          profiling tools.
          Yes, WLS6.0 is now retired.
          sree
          "Ethan Allen" <[email protected]> wrote in message
          news:[email protected]..
          >
          > Pls forgive some naivete as am new to clusters ... we have WLS 6.0 running
          an app
          > clustered on 3 servers and we have problems crashing every other day and
          slow
          > performance all the time. Platform is Win NT 4.0 SP4 with 640 MB RAM,
          using IIS
          > as HTTP server, with BigIP F5 load balancer in front. This is a strange
          configuration
          > to me and WLS 6.0/NT is pretty old I think ... but it's hard to know where
          to
          > start looking for source of problems !!
          >
          > Can anybody pls help with general thoughts ? appreciate it ...
          >
          > thans in advance ...

Clustered volume question

I've recently taken over the administration of a network that has the core file shares on 3 physical, clustered Netware 6.5 machines. They are extremely old servers and the Fiber-Channel SAN on which the file shares reside is at end-of-life. The combined size of these file shares is around 1 TB. I need to migrate these volumes to some other platform.
I'm much more familiar with SLES and OES2 than I am with Netware. I need to move these file shares to new Equalogic SAN volumes. I'd like to create a clustered or at least an HA environment. I'd like the hosts to be VM's on ESX 3.5 (soon to be upgraded to ESXi 4.0).
What I'm looking for are some suggestions from the community as to how to proceed. Reliability is an issue as is speed. The Netware/Clustered volume environment has been extremely reliable.
We are a private university with approximately 600-800 concurrent users. Any suggestions would be helpful.

Novell does provide migration tools.. Personally I like to do the work
manually.
To move the data shouldn't be a problem.. you can export on netware the
volumes via NFS and Rsync the Data directly to an OES Server (obviously
you could use CIFS or NCP as well, I just find NFS faster)
If you use the rsync -a option it preserves most file information (there
are other options)
Backup the trustees on Netware (using trustee.nlm)
you will then need to convert this file format to OES file format,
Again I do this via a script that turns each line in to a RIGHTS import
command (rights is used on OES Linux)
If you have moved homedrives you will need to re-apply file permissions
either via trustee export or I just run in linux an 'ls' in a for loop
on the Users folders and apply that using the rights command.
You will also need to re-add the homeDirectory attribute. again I use a
tool, that a colleague wrote, it is called ldapdo and is on coolsolutions
We run a 5 node cluster, on physical hardware, I am not sure how well
supported clustering is on ESX.. Personally I would use physical
hardware. But then I am not a fan of ESX.
Personally, I don't find OES Linux as good as Netware, We had the same
number of resources on fewer servers, That said with the latest updates
stability has vastly improved and so has the cluster migrate speeds.
We currently have up to 2000 concurrent users on a busy day (with up to
80 - 90 concurrent logins for labs). We provide access via NCP, CIFS
and NFS for Linux labs, although we are looking to remove NFS as with
NSS you can only export the file system with a NO_ROOT_SQUASH.
Our data usage is about 14TB across 30 resources, Our university is try
to centralise all IT, onto Windows however are failing to provide a
solution that is stable and able to support multi protocol access. In
the mean time, our system limps on, on old hardware.
If you want any of the scripts let me know, they really were thrown
together but they do the job.. I have to migrate data quite often on to
new disks (Bigger) As our data requirements grow. We use some pretty
reliable but cheap sata SANS called infortrends... As our budget is
minimal..
On 24/09/10 12:36 AM, tagross wrote:
>
> I've recently taken over the administration of a network that has the
> core file shares on 3 physical, clustered Netware 6.5 machines. They are
> extremely old servers and the Fiber-Channel SAN on which the file shares
> reside is at end-of-life. The combined size of these file shares is
> around 1 TB. I need to migrate these volumes to some other platform.
>
> I'm much more familiar with SLES and OES2 than I am with Netware. I
> need to move these file shares to new Equalogic SAN volumes. I'd like to
> create a clustered or at least an HA environment. I'd like the hosts to
> be VM's on ESX 3.5 (soon to be upgraded to ESXi 4.0).
>
> What I'm looking for are some suggestions from the community as to how
> to proceed. Reliability is an issue as is speed. The Netware/Clustered
> volume environment has been extremely reliable.
>
> We are a private university with approximately 600-800 concurrent
> users. Any suggestions would be helpful.
>
>

Scroll bar on clusters example - question

Hello,
I know there are allot of toppics about this subject but I found an example that would do the trick for me.
But it won't work. I can scroll but nothing happens...
I'll post the original example i found and an example to show you how i'm using it.
My cluster contains a boolean 2D array and a nummeric 1D array.
It is not the actual data but the setup is the same.
kind regards,
Lore Maris
Student
Solved!
Go to Solution.
Attachments:
Cluster_scrollbars_myexample.vi ‏12 KB
Cluster_Scrollbars.vi ‏12 KB

i'm affraid I did something wrong again
I think it could be a solution but it won't fill up.
I'll send you the original VI i'm working on.
You won't be able to run it though 'cause i'm using hardware.
I kept the original layout too so you could see what the idea actually was. But yours is an option too.
thanks for your time and effort!
Attachments:
CANExpert opt3.2.vi ‏43 KB

A non-RAC question for the experts: Clusterware + ASM

Hi
We have a 2-nodes cluster in production.
It's an active/passive cluster with a cold failover using SUN Cluster.
There is only one Oracle 10G single-instance database (DB1), running on node #1, that use ASM to access the SAN (it's raw devices).
We want to add a third nodes to move to a 3-nodes cluster, that would have 2 separates single instance Oracle 10g database
node #1: DB1 with ASM (the existing database, existing raw devices)
node #2: cluster passive node
node #3: DB2 with ASM (new additional database, new raw devices)
All nodes are connected to the same SAN.
We' want to use Clusterware instead of SUN Cluster.
The single-instance databases, the listeners and the ASM instances would be protected by Clusterware using "application VIP" (not oracle-vip).
It's not RAC ! but in the future both database might become RAC (but that's not the need today)...
My concern is about ASM !
Do I have to install an ASM instance on each node (just like in RAC) ?
Or may I just configure clusterware to ensure there is only ASM instance running on a node ?
Is it possible to have the ASM instance of node #1 and the ASM intance of node#2 that access the same SAN & raw devices ?
In the case DB1 & DB2 fail over to node#2, the unique ASM instance must see the raw devices of both databases, is this possible ?
Do I have to destroy the curent ASM configuration of DB1 to build the new one, or can I just add new raw devices and share tem across all nodes ?
Thanks for your answers.

Hi,
Thanks for the answer
I found this very interesting doucument but it does not go into enough details about ASM, which is my concern.
I found in the Oracle 11g documentation a statement which say that clustered ASM instances for single instance database do not need to talk each other as long as they do not handle the same diskgroup (Figure 1.3 ; http://download.oracle.com/docs/cd/B28359_01/server.111/b31107/asmcon.htm#i1021337) . Otherwise, it must be clustered. It would also be a problem for me when DB1 and DB2 are on the same node. I would need two different ASM instance, on the same node, which is not a good situation.
What happen when I start an ASM instance on node #3 to access raw devices already in use by node # 2.
I think I need to start from node #1 and change some ASM configuratoion to make it cluster-aware.
Next, I would add a second clustered ASM instance on node #2, and so on, to make sure that all ASM instances of all nodes can access the same diskgroup, and thefore being able to re-use the existing database on node #1 as well as creating a new one one node #2 (all on the same SAN)

How to convert single instance10g db to 11gR2 RAC with ASM

Hi,
I need your help to decide the plan about how to convert single instance 10g database to 11gr2 rac with asm.
I can have about 6 to 8 hours of downtime to upgrade and move to rac with asm.
db size is about 1.5tb and on AIX.
here is my plan....
1) install 11gr2 rac with asm on two nodes
2) verify rac installation and clustered asm
3)install 10g oracle binaries( yes 10g )
4) shutdown production db ( machine prod )
5) make copy of production and restore on 1st node ( using shadow image , so it's quick and its file system )
6) upgrade db to 11g ( still of file system )
7) after successful upgrade, move to asm ( rman backup )
8) add another node
does it look okay ? OR is there a better approach to save time?
can someone help me ?
Thanks...

Thanks ...
So here is what I thought... suggest if something is not right...
1) install 11gr2 grid infra on node A and B with ASM
2) stop CLUSTER ON BOTH NODES.
3) shutdown prod db on 10g ( downtime starts )
4) take rman cold backup
5) restore rman backup on node A on ASM ( as if single instance 11g , no rac parameters )
6) mount and run upgrade script for 11g, then open db with 11
7) after successful upgrade, shutdown db node A
8) change all rac related parameters, spfile,undo,redo for rac environment on both nodes
9) open db in rac environment
can I do this way ?
My only question is, even though I installed rac on node A and B, in step 5 and 6 I'm using only node A as if it is single instance. Is it possible ?
if it is then I'm good to go...
Thanks for all suggestions.

Clustered ASM question

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