Installation of pre-production in Oracle 11 g RAC 2

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• How to clone of pre-production to the production database in Oracle 10g?

  I'm a newbie DBA and gave me this task to clone a primary DB environment preprodcution of Production environment. I tried Googling, but all other positions have different and confusing steps. Can someone help me get the exact steps please?

  sweetritz wrote:

  Hi EdStevens,

  I'm a newbie Oracle DBA. Yes prod server has a database running on it and I want to clone a DB of preproduction on the Prod as an extra DB server (fusion has not any data with any DB existing).

  then I would say rman DUPLICATE DATABASE is your best choice.  And it does not require the Pb of pre-production to be arrested, only that you take backups rman (Yes, online backups work as long as you have the necessary archivelog files.)

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• Need help to synchronize the pre-production and production box init parameter

  Hello
  
  I have a HP - UX 11i production database. The database is the CARS with 3 instances. The storage is on ASM. Recently, we have created a database of pre-production for tests on RedHat Linux 4 worm. Here are the details of the environment 2:
  
  Production: HP - UX 11i, 24 GB of RAM, 8 CPU, Oracle 10g R2
  
  Pre-production: RED HAT ver 4, 16 GB RAM, 4 CPUS, Oracle 10 g R2
  
  Basically everything in creation the two environment are not identical configuration. Now, I need to bring to the pre-production environment in harmony with the environment of Production from the point of view oracle init parameter. I have listed down below below the parameters that is different. Please tell me how many of these parameters can be bring in sync. Setting shmmax doesn't set on the two core area is 4 GB.
  
  Name of the parameter of V$, value on Production - value on the pre-production
  -----------------------------------------------------------------------------------------------------
  cpu_count----------------------------------8-------------------------------------     4
  CURSOR_SHARING - EXACT - FORCE
  db_recovery_file_dest_size - 32212254720 - 15032385536
  dml_locks----------------------------------1472----------------------------------748
  fast_start_parallel_rollback - LOW - FALSE
  filesystemio_options - asynch - no
  LARGE_POOL_SIZE - 33554432 - 0
  log_buffer - 14493696 - 7012352
  log_checkpoints_to_alert - TRUE - FALSE
  open_cursors - 1000 - 300
  parallel_execution_message_size - 2152 - 2148
  PARALLEL_MAX_SERVERS - 160-80
  pga_aggregate_target - 2147483648 - 1692401664
  processes----------------------------------     300-----------------------------------150
  session_cached_cursors - 100-20
  sessions------------------------------------     335-----------------------------------170
  SGA_MAX_SIZE - 5368709120 - 675282944
  SGA_TARGET - 3221225472 - 675282944
  sql92_security - FALSE - TRUE
  standby_file_management - MANUAL - AUTO
  transactions - 368-187
  UNDO_RETENTION - 10800 - 1800
  
  Thank you

  NOTE: You must be a query V$ PARAMETER ISDEFAULT = "FALSE" only to identify the paraemters which are or have to be defined.
  You must identify these paraemters which are explicitly defined by the DBA, rather automatically determined by Oracle.

  1. you do not explicitly set or change cpu_count. Let Oracle automatically set it based on the number of processors / cores he sees as being available. (if you have multiple instances of database on the same server, each instance will 'see' the same number of processors / cores)

  2 cursor_sharing must always be the same development, pre-production and Production. However, I would first of all ask allows you to determine why it has been set by the dint of Production. That must be done only after careful consideration and test!

  3 db_recovery_dest_file size is relevant for backups RMAN identified by db_recovery_dest disk space. If it is not relevant to this discussion.

  4 dml_locks, sessions, transactions, etc. are all automatically determined by Oracle based on the PROCESS.

  5 fast_start_parallel_rollback is irrelevant. I wonder why it has been explicitly defined?

  6 filesystemio_options really depends on your platform. HP - UX 11i and Redhat Linux are very different.

  7 are defined explicitly large_pool_size and log_buffer? Or they remain to be determined automatically by Oracle based on other parameters (SGA_TARGET for example)?

  8 open_cursors, generally not be set unless you have an application that really opens up very many cursors by session. Why is defined differently? It is a per session setting.

  9. I suppose that parallel_max_servers is not explicitly defined, but remains to be determined by Oracle based on other parameters (for example cpu_count).

  10. I wonder if parallel_execution_message_size has been explicitly defined or is automatically defined by Oracle and OS dependent.

  11 pga_aggregate_target would have explicitly set the appropriate value based on your hardware and its use must be determined.

  12 session_cached_cursors generally didn't need to be explicitly defined. If it is set, why he is set on these different values?

  13. Why is SQL92_SECURITY explicitly different?

  14 standby_file_management is not relevant here.

  15 undo_retention could be about the same.

  Your REAL concern should be the values defined for CURSOR_SHARING and SQL92_SECURITY. These are the only ones who are really identical in both environments. The others are "setting buttons" while these "fix"behavior ".

  Hemant K Collette

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• Set up a pre-production environment...

  My current employer has a pre-production environment that is being updated nightly from the production. I started to look at how it is done (powerCLI script) and I'm trying to make things better.

  Here's how it works.

  A snapshot is taken of production servers, which 'freeze' the base vmdk disk. A new virtual machine is created for pre-production and it uses the 'frozen' drive to the production server database, because it is not persistent mode, clean disc. Of course, the virtual machine is connected to a group of isolated ports. Basically, this allows the team dev/infra to have an identical copy of the production servers anytime (just run the refresh script).

  While this works very well, I have a problem on using disks of production for this purpose. Usually, I prefer to leave only one production and complete clones have either fully provisioned pre-production environment.

  Suppose I'm onboard with happens like that and I want to automate the creation of these reservoirs of pre-production. Right now they are built manually to the new servers, and then the refresh script.

  Refresh the script:

  (A) pre-production shutdown server

  (B) remove the snapshot on the production server (committing the latest changes to the base vmdk)

  (C) create new snapshot to the production server (freeze the base vmdk)

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  This script is scheduled every night to start the next day with a cool environment. Another advantage of this approach that is not persistent, it is that a simple reboot brings the pre-production back to a clean version (if tests are not doing well).

  Issues related to the:

  Is there a way to clone a virtual machine without the disc? This would make the easy creation of new servers in pre-production. Clone, log drives, change the port group. Fact.

  Is there a better way to achieve that kind of result without this kind of 'false linked clones?

  The following seems to work for me. A few notes:

  • The virtual machine is cloned without any of its VMDK
  • The new virtual machine is created on the same node of ESXi and store data as a source of VM (since you don't seem to have special requirements in this aspect)
  • This script does not work for a virtual computer with RDM disks

  $vmName = "sourceVM".

  $vmClone = "cloneVM".

  $folderName = "MyBlueFolder".

  $vm = get-VM-name $vmName

  $folder = get-file-name $folderName

  $spec = new-Object - TypeName VMware.Vim.VirtualMachineCloneSpec

  $spec. Location = New-Object - TypeName VMware.Vim.VirtualMachineRelocateSpec

  $spec. Location.Datastore = $vm. ExtensionData.Datastore [0]

  $spec. Location.Host = $vm. ExtensionData.Runtime.Host

  $spec. Config = New-Object - TypeName VMware.Vim.VirtualMachineConfigSpec

  Get-disk hard - VM $vm | %{

  $dev = new-Object - TypeName VMware.Vim.VirtualDeviceConfigSpec

  $dev. Device = $_. ExtensionData

  $dev. Operation = [VMware.Vim.VirtualDeviceConfigSpecOperation]: remove

  $dev. FileOperation = [VMware.Vim.VirtualDeviceConfigSpecFileOperation]: destroy

  $Spec.Config.DeviceChange += $dev

  }

  $vm. ExtensionData.CloneVM_Task ($folder. ExtensionData.MoRef, $vmClone, $spec)

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• Installing Oracle 11 g RAC 2: cannot delete directory under/tmp bootstrap

  People,
  
  Hello. I want to install Oracle 11 g RAC 2 with 2 Virtual Machines (rac1 and rac2 which BONES are Oracle Linux 5.6) VMPlayer and according to the tutorial
  
  http://appsdbaworkshop.blogspot.com/2011/10/11gr2-RAC-on-Linux-56-using-VMware.html
  
  I'm installing network infrastructure. I'm on step 7/10 (check the installation grid environment) and you get this error:
  
  "Free space: Rac2: / tmp '.
  Cause: Could not determine the mounting point for the specified location.
  Action: Check the specified location is available.
  Expected value: n/a
  "Actual value: n/a"
  
  
  In order to correct the above error, I run "cluster verification utility" according to
  http://docs.Oracle.com/CD/E14072_01/RAC.112/e10717/CVU.htm I run the following command:
  
  [ora11g@rac1-] $ /home_grid/runcluvfy.sh pre - crsinst - n rac1, rac2-verbose stage
  
  Output:
  / bin/rm: cannot remove directory ' / tmp/bootstrap ': operation not permitted
  ./runcluvfy.sh:line 99:/tmp/bootstrap/ouibootstrap.log: permission denied
  
  
  The above output, we see that the bootstrap of under/tmp directory is causing the problem. The solution is to remove bootstrap directory. I run the 2 commands:
  
  [ora11g@rac1 tmp] $ rmdir bootstrap
  
  Output: Operation not permitted
  
  bootstrap [ora11g@rac1 tmp] $ rm - rf
  
  Output: cannot remove bootstrap: operation not permitted.
  
  [ora11g@rac2 tmp] $ ls
  
  Output: there is no directory "bootstrap".
  
  My questions are:
  
  First of all, who "cannot remove bootstrap in rac1" cause/tmp in rac2 could not be determine mount point?
  
  Secondly, all folk can help remove bootstrap directory under the directory/tmp?
  
  
  Thank you.

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