Oracle ASM, SAN and VMware

Similar Questions

• ASM, SAN and Consolidation of LUN

  We lack a couple because with 11 GR 1 material clusterware and ASM. We have an HP EVA SAN on the back end and we arrived at a point where the number of LUNS allocated to our CARS will be ridiculous. I want to do is to consolidate the number of LOGICAL units to a more manageable (a max 8) number. Did anyone done this before? All good tips/tricks that I can look at? We are already looking to the possibility to upgrade to 11 GR 2 and if there is additional support for San with ASM on 11 GR 2, it's going to make this decision a lot easier.
  
  Thank you
  
  John

  I have another question: in the future, can we just expand the LUNS in the SAN and ASM will be pretty smart to pick that up, or is there another step to get this expansion detected?

  Well, I've never tried. But the steps required will involve something like this:

  1 expand LUNS on the storage site
  2. change the partition table on LUN exported to the database server to accommodate the new size
  3. reboot (because on disks used [in your case by ASM] changes of presentation of the score are seen after a reboot only)

  -now, I - assumptions

  4 ASM will detect the new size

  OR

  4. you must remove and re-add the updated disk the

  If you want my recommendation: just add new LUNS if you need to expand the space. Make sure they are of equal size. If the number of LUNS can test too large, you can rearrange them like you do here.

  --
  Ronny Egner

  My Blog: http://blog.ronnyegner-consulting.de

• Oracle ASM normal, high and external redundancy

  Hello

  I have some doubts in the levels of normal, high, and external redundancy in the concept of the DSO.

  External - any group fail. No mirroring.

  Normal - two way mirror. Group of failure.

  Top - three way mirror. Group of two failed.

  1. I hope that my understanding on above mentioned 3 types in good.

  2. my main question is what is the minimum number of disks required for the establishment of normal and external redundancy disk group? We cannot create disk group with the members of a single disc?

  Kind regards

  007

  Normal - two way mirror. Group of failure.

  Top - three way mirror. Group of two failed.

  This is false. You need at least two failure for normal and three groups of failure for high redundancy.

  By default, each disk or logical unit number is a group of default, but you can also add more drives to the same group of interlacing of the installation failure. The configuration depends on material available, disk space requirements and the needs of redundancy. ASM provides redundancy between groups of failure.

  Remember that ASM is not disk mirror. It is not RAID. ASM from mirrors of the level and allocation of file units. He knows about Oracle database files and can therefore use optimum and variable block sizes based on the patterns of files. You can add and remove disks to reconfigure your drive grouips online without having to re - initialize your storage, which you can not do with RAID or external redundancy.

• behavior of the api VMware SAN and NFS

  While working on the vmware api Reconfigure_task fact face a problem. A single montage, in the same scenario, he started the exception as

  incompatiable backup device 1 in the case of NFS, but in the case of SAN, it is throwing exception as a Configuration not valid for the '1' device.

  My question here is that if vmware SDK behaves differently in the case of SAN and NFS for the same api?

  Is there any document coming from where we can get more information on the different behavior and how to approach us differently through the c# application?

  Basically, the answer is no. VimSdk acts not differently for NFS for SAN.

  Of course, ReconfigureVM_Task can have constraints special som according to the storage used.

  Tos2k

• Oracle Grid Infrastructure and ASM Tech Supprot

  Purchase given the Support of Oracle grid Infrastructure and ASM. Is there a site web/link I can go?

  Hello

  ASM is part of the database. So you get the support with the RDBMS product.

  Concerning
  Sebastian

• SAN multisite and VMware Fault Tolerance

  Hello

  My apologies if this is in the wrong section.

  I have a requirement for the two main rooms, with SAN and ESX hosts in each room.

  In total I have, for the sake of arguments, 200 VMS, with a split 50-50, so 100 in each room Basic.

  I want to use VMware of fault tolerance for machines remain operational in the event of a major failure or the other room Basic.

  I think I can use Multisite SAN to do.

  Please see attached diagram fo what I want to do, I know that the diagram is not correct but I drew it fast just to try to explain the scenario.

  What I want to know (or have help on) is:

  Is it possible to use fault tolerance in this way have no downtime in the result of a failure of basic room? (basic rooms are not very remote and use the same networks)

  How does multi-site SAN work, are there articles I can read to help me understand this?

  Multisite perhaps SAN iSCSI or fibrechannel?

  Thank you.

  SAN should resemble a single San for all ESXes. It doesn't matter how you do it.

  > If I my synchronous SAN mirror, might simply use FT for the vcenter as well?

  It is possible for the small environment. In general, vCenter requires 2 vCPU, while FT works for uniprocessor VMs only. But do not overestimate FT, it is not a universal solution and the universal answer.

  > Also with FT, can you specify the server host in the cluster to act as the secondary?

  Directly - no. The only way - to create link VM to any resource that is available for 2 ESXes only.

  ---

  MCSA, MCTS, VCP, VMware vExpert 2009

  http://blog.vadmin.ru

• Oracle ASM or not?

  Hi all!

  I just read document VMware, titled "Oracle Database on VMware best practices Guide"... It is a very good document, but I wonder why it only addresses configuration using Oracle ASM database.

  I understand that for better flow, it would be preferable to use ASM...

  (I also understant as raw device mapping is the best configuration for performance - BUT I certainly would not recommend using RDM for the complexity of management he added..).

  It seems simple to implement ASM here because of responsibilities (sysadmins vs s/n).

  So my question is:

  1 - at - it someone * NOT * using DSO for their Oracle on VMware database successfully?

  What I mean by that, no instance ASM, data files on VMFS file system...

  2 - does anyone actually measured the performance difference (between ASM and DO NOT ASM use)?

  3. I know that it is recommended as a best practice (for the best flow) to separate online redo logs and data files - but not really NOT bad to do?

  In other words, how is harm to merge the logs with data files.

  All thoughts/references are welcome...

  Jocelyn

  See https://community.oracle.com/message/12273470#12273470

  1 & 2: ASM or non - difference performance wise is not that big

  2 - reasons to log files & data separate are for caching of the locations (i.e. EMC Fast Cache) & recovery.

• Cloning of Oracle ASM disks

  Hello

  We will virtualize a server physical Linux having an Oracle ASM database.  The physical server will remain intact and the new will be virtual under test.  How to meet the LUNS / volumes on which the DSO has database of data?  I guess we can clone them via SAN, but do not know what's next on the virtual server.

  Thank you very much.

  Since you are using ASM, the SPFILE is also the ASM.  You will need to clone the operating system disks, trees and ASM software and introduce them to the VM Oravcle.  This will give you admin/diag directories as well as password files.  The TNS files and the listener must exist as well.

  On the oracle VM, start the listener.  Then start ASM.  You need perhaps to remove localconfig and localconfig add tips to clear clusterware and reset the ASM.  When you start ASM, if the ASM mount is the same, the asm_diskstring shall not be changed.  He should see the clone disks ASM and climb very well, otherwise change the asm_diskstring to indicate where are the disks ASM, ASM bounce and they are expected to rise.

  Once the DSO is started and starts up, you should be able to start the database without any problems.

• Oracle ASM support without installing ASMlib in Oracle11g r2 RAC

  Dear experts,
  
  We want to use the Oracle ASM for Oracle11g r2 RAC.
  
  Partitions raw storage (SAN) shared can support for ORACLE ASM for storage of OCR, voting and DATABASE and LOGS of ARCHIVING?
  
  In Oracle10g RAC
  ASM is capable of referencing of discs as raw devices or using the ASMLib software.
  
  Is any alternative for ASMLib in Oracle11g CARS or that mandatory!
  
  Please help clear the understanding of Oracle ASM with Oracle11g r2 RAC.
  
  
  Concerning
  Hitesh Gondalia
  
  Published by: hitgon on August 11, 2011 02:20
  
  Published by: hitgon on August 11, 2011 02:23

  hitgon wrote:
  Can I use raw devices for the grid infrastructure of r2 Oracle11g (for ASM storage) of OCR, VOTING and DATA / ARCHIVE!

  Thank you
  Hitesh Gondalia

  From raw devices 11 g is not supported for the storage of the OCR + vote but you can present the raw devices for ASM. in 11 GR 2 OCR and voting can be stored in ASM

  Hope this helps

  See you soon

• Creation of Oracle ASM agent - collections allow the BONE?

  If an agent has already been created for a given instance of Oracle and an agent has already been created for the host operating system that the Oracle instance is installed on, then creating a 3rd agent to monitor Oracle ASM on the same host, you are given the option of 'collections Enable OS' on the host operating system platform.

  It is not clear to me that the impact is to select Yes or no here, given that I've already created other officers. Does anyone have any idea on this?

  Thank you.

  It seems that in your case the operating system is already be montiored so you don't need to create the home screen again. If you enable it, it will create another agent of the OS.

  Golan

• Need help for Oracle ASM

  Hello Experts,

  My name is Rohan and I work as an Oracle DBA now, I fell on the ASM and I want to learn it.

  I have a knowledge base of Oracle ASM and I also configured/created an instance using DBCA.

  Now for the best understanding I want to create the same with the command line.

  Everyone please give me the great tutorial for the same?

  I'm using oracle 11.2.0.3 on windows.

  
  

  Thanks in advance.
  

  CREATE DATA base should be with the ORACLE_SID set to the desired database SID, not the SID of the DSO.  Also, if you have (as in 11 g) two separate ORACLE_HOMEs for the ASM and the database, the DATA CREATE database must be run ORACLE_HOME database.

  Hemant K Collette

• How to re - create an an existing tablespace in oracle ASM 11 g? I'm looking to add a script

  How to re - create an an existing tablespace in oracle ASM 11 g? I'm looking to add a script

  user12081439 wrote:

  How to re - create an an existing tablespace in oracle ASM 11 g? I'm looking to add a script

  Dbms_metadata can help and if you have EM (GC or CC), which has a nice, create like option, may help as well.

  Aman...

• To work with a SAN and vMotion virtual servers configuration

  Hi all:

  I apologize in advance if this discussion is too much like another.

  I intend to use the following configuration (not yet deployed) and would appreciate your comments and input:

  2 physical host servers running VMware ESXi

  1 SAN Fiber Channel

  high availability and vMotion

  I just have a few questions:

  (1) then I keep all the VHD on the SAN files?  (I intend to have VHD files separate OS disk and DATA drive for each virtual computer).

  (2) is it recommended that I have all the hard drives the on host computers physical (to run virtual machines or anything else like swap files)?

  (3) how much space I have on the SAN?  I guess too much for the readers of the OS and DATA readers of all virtual machines... it's any additional space recommended for anything?

  (4) everyone would be able to direct me towards guides describing how to set up?

  Sincerely,

  Kahn

  (1) then I keep all the VHD on the SAN files?  (I intend to have VHD files separate OS disk and DATA drive for each virtual computer).

  Yes you can, and just a tip, on VMware world the virtual disk is called VMDK :-)

  (2) is it recommended that I have all the hard drives the on host computers physical (to run virtual machines or anything else like swap files)?

  You can use the same physical host computers without the hard drive, because you can boot from SAN, or use features such as automatic deployment, but it is the facility for the virtual machine, my recommendation is to use disks (volumes) of your San and share this volumes between your hosts to be able to configure High Availability (HA). Without shared storage, you can not HA.

  (3) how much space I have on the SAN?  I guess too much for the readers of the OS and DATA readers of all virtual machines... it's any additional space recommended for anything?

  Space on SAN depends on the size of your virtual machines and little extra space to make room for Exchange and snapshot files.

  (4) everyone would be able to direct me towards guides describing how to set up?

  The documentation will have everything you need: VSphere 6.0 Documentation Center , but if you want some guide step by step and with video/screen, see this one: BackToBasics | Mike Landry...

• Oracle ASM 11.2.0.1.0 on Linux 6.5 (Red Hat)

  Can someone point me to a doc that says that Oracle ASM 11.2.0.1.0 is NOT supported on Linux (Red Hat) 6.5?   I looked and looked, but can't this particular doc.

  Is Oracle ASM 11.2.0.4 supported Linux (Red Hat) 6.5?

  Thanks for your help.

  Hello

  Thanks for your reply. I'm not an Oracle client. I'm just a student, try to install it and learn Oracle.

  In this case I suggest you use 11.2.0.1 database on OEL 5.7/5.8

  Thank you

  A H E E R X

• Resize the space Oracle ASM

  Hello
  
  My use of oracle ASM database, I use the storage of DATA (data files and Archives...). my storage autour to be complete, so I want to add the new storage space (new hard disks).
  
  So my question... on the side DBA is, something needs to be done? new hard drive then added to the disk group as fdisk? or the space will automatically be added to the total space?
  
  My storage admin told me that it can re-size space on its side without doing anything on my side as a DBA, a problem this way? again is the same as for an old hard drive.
  
  Please advice,
  
  
  Kind regards
  Awad Awad

  There are two options.

  1. your store admin can expand a LUN, and then you can resize the ASM drive in the extra space.
  http://docs.Oracle.com/CD/E11882_01/server.112/e18951/asmdiskgrps.htm#sthref282

  2. your store admin can give you another logic unit number. When you add this logic unit number to a diskgroup, ASM will automatically use and therefore to increase the size of the diskgroup.

  My preference is #2. It of less work and less risk.