information Exadata

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• Will begin to dba Setup on exadata machine. Need guideance/information

  Hi, the company I worked for more than 10 years finally decided to buy an exadata machine.

  Can someone tell me where I can start building databases oracle exadata machine?

  Thanks in advance.

  Hello user301176,

  Don't you _have_ to change anything as the index, compression, partitions etc.?  No, you don't have to, but it can also prevent you from maximizing the benefit of the Exadata features like hybrid columnar compression.  As changes such as indexing, partitioning and compression generally involve the movement of data in any case, migration of platform (where you are already running all data) can be the perfect opportunity to make these types of changes with a minimum load.

  Marc

• Datapatch on the new empty container (CBD, exadata 12.1.0.2) database returns the error state of the PDB.

  I created a new CBD CAR empty database on a cluster exadata using an ORACLE_HOME (12.1.0.2) which has been patched with patch latest bundle.

  I ran the datapatch utility to apply these patches to the container before any new APB to a database that is already patched the cloning.

  However, datapatch first correctly identifies adjustments but it fails on a prereq error:

  DINVCDB:Oracle@dev-EXD-dbadm01:~/DINVCDB > datapatch

  Remedial tool version 12.1.0.2.0 SQL kill him Dec 22 21:14:15 2015

  Copyright (c) 2015, Oracle.  All rights reserved.

  Connecting to the database... Ok

  Note: Datapatch will only apply or rollback SQL fix for PDB

  that are in an open State, no patches will be applied to the closed PDBs.

  Please refer to the Note: Datapatch: database 12 c Post Patch SQL Automation

  (Doc ID 1585822.1)

  Determine the current state...

  Adding patches to the installation queue and execution prereq checks...

  Queue the installation:

  For the following PDB files: PEH$ ROOT APB$ SEEDS

  Nothing to roll back

  Apply the following patches:

  21555660 (database 12.1.0.2.5, consisting of virtual machine Java of Oracle (Oct2015) power supply)

  21694919 (DATABASE PATCH BUNDLE: 12.1.0.2.13 (21694919))

  Error: failure of prereq cheques!

  patch 21555660: pluggable databases that need to be patched should be in upgrade mode

  PREREQ check failed, out without having to install patches.

  
  

  Please refer to 1609718.1 Note MOS and/or the log of the invocation

  /U01/app/Oracle/cfgtoollogs/sqlpatch/sqlpatch_11932_2015_12_22_21_14_15/sqlpatch_invocation.log

  For more information on how to fix the above errors.

  
  

  Patching SQL tool on Mar 22 21:16:26 dec 2015

  
  

  Unfortunately the MOS score is General and I do not see this situation described. The newspaper simply indicates this same error.

  
  

  Since there is no PDB, why make this mistake?  I don't think it's possible to open the PDB$ SEEDS as upgrade?

  
  

  I had already tried cloning my non - PDB in a PDB here (successfully) file, but then I also met problems with datapatch (in PDB not at CDB patch).  I tried with the options and force database and this succeeded with warnings, but I was unable to open the PDB.  I thought, okay, what oracle says that the whole point of multitenant is to be able to update the plugin, it should be possible to patch a CBD empty.  I can't seem to find much on this point, somebody manage this problem?

  
  

  What is the best method to establish the original CDB and ensure that it is patched in line with its ORACLE_HOME?

  
  

  Thank you!

  Sandra
  

  sidneys wrote:

  Error: failure of prereq cheques!

  patch 21555660: pluggable databases that need to be patched should be in upgrade mode

  PREREQ check failed, out without having to install patches.

  to work around this problem, new PSU have a new dependency for the datapatch to be applied correctly.

  1 starting in fashion upgrade instance

  start upgrade

  2. then apply datapach

  $ORACLE_HOME/OPatch/datapach - verbose

  3. restart the instance in normal mode

• Why is there no separation of roles in exadata?

  Material: X 3-quarter Rack

  # imageinfo

  Version of the kernel: 2.6.32 - 400.11.1.el5uek #1 SMP Thu Nov 22 03:29:09 PST 2012 x86_64

  Version of the image: 11.2.3.2.1.130109

  Image enabled: 2013-10-13 18:12:52 + 0800

  Image status: success

  The score system on the device: / dev/map/VGExaDb-LVDbSys1

  DB version: 11.2.0.3.0

  The GI version: 11.2.0.3.0

  I noticed that there is no user network in Exadata. That is to say the grid Infrastructure is managed by the oracle user. It is against the recommendation of the oracle. Why is this?

  Hi Max,.

  Prior to the deployment of an Oracle Exadata will ask you to provide information about the property intellectual property extends, setting of the software base etc.

  Here you can tell Oracle want an Exadata configuration with separation of the roles (user of grid and oracle) or no separation of roles (user oracle only) as well.

  During the deployment, a script called onecommand will run which will configure your Exadata accordingly.

  Kind regards

  Tycho

• backup rman Exadata with zfs

  Our company has recently decided to start backup rman ZFS instead of regular tape backup.

  I would like to know what is the right measures to check if ITS configured right device of ZFS, the implementation of rman backups, etc.

  I'd appreciate someone here can point me to the right document.  I read ZFS Q and A and backup using ZFS best practices. All very unclear and seems none of them provide a digital step step.

  I wonder if Oracle provides an instruction step by step for the DBA.

  9233598-

  Q documents & you examined include the "Oracle ZFS storage pool: FAQ: Exadata RMAN backup with Oracle ZFS Storage Appliance (Doc ID 1354980.1)" Note? This note has a lot of information and is updated regularly and includes information about configuring ZFS and RMAN backups to the device of ZFS.

  Some useful books of whites, an I have used in the past and has been updated again last year: Oracle Exadata with the Sun ZFS Storage Appliance protection: best practices in Configuration and backup and recovery Performance and best practices using Sun ZFS Storage Appliance with Oracle Exadata Database Machine

  These documents will in many details - including providing examples of scripts.

  HTH.

  Thank you

  Kasey

• Exadata problem critical DB24

  I have another question here.

  exachk rises above two questions. Seems that both need to apply patches.

  There are corresponding notes for how to apply these fixes.

  So I wonder what should I apply patches? or just apply the latest patches to exadata information center?

  Please advice.

  Thank you

  Hi user569151

  Do not forget that the bundle patches come out each month and releases of exachk doing frequently as well, so if you want to completely avoid the exachk warnings in the future, plan on correcting regularly.

  888828.1 DocID is the right place to look.  Search for "11.2.0.4.8."

  Marc

• Is it possible to create different starts to exadata?

  We have a need to have a few more starts other than + DATA and + RECO.

  How do we proceed? Exadata version is x 3.

  Thank you

  user569151-

  As 1188454 said it's possible. First of all, I would like to ask why do you need to create groups of additional disks data, the reco, and dbfs disk group is created by default. I see Exadata users often question the default disk groups and add or modify the disk groups to follow what they did previously on no RAC environments/Exadata ASM. However, usually the groups of data disks and reco are sufficient and allow the best flexibility and performance. One of the reasons to create multiple groups of disks could be wanting to have redundancy options different two different for a group of data disks - to have a prod on high redundancy database and a database of test on normal redundancy for example; but it is not much needs to change.

  Adding groups of disks, you will also need to rearrange and add new disks of grid. You must keep the prefix grid drive and disc corresponding equivalent group names. Do not forget that all the Exadata storage is allocated to the existing network disks and disk groups - and it is necessary to keep the configuration of the necessary balance and optimize performance. So add and resize the disks of the grid and disk groups are not a trivial task if you have already running on the Exadata DB environments and especially if you have enough of free space in the data and the recommendation to drop the grid of all disks in a failgroup - because it requires the removal of data before you proceed to add and resize network disks. I also met problems with the grid disks that end up forcing you to move the data on resizing disks - even if you think you have enough space for a fall aloo any group fail.

  Be sure to correctly estimate the size of the groups drive - factoring in redundancy, lack of groups and book space to handle the failure of the cell - thus the anticipated growth of the data on disk groups. Because if you run out of space in a disk group, you need to go through the process of resizing of all disks in the grid and groups of disks as a result - or buy an additional extension of Exadata or Exadata storage grids. This is one of the reasons why it is often better to stick with just the data and existing Reco.

  To add new records grid and disk groups and resize other becomes very familiar with the information and follow the steps the section "Resizing storage Griddisks" Ch. 7 user's guide the Exadata Machine as well as the information and examples in the MOS score: ' resizing disks grid Exadata: examples (Doc ID 1467056.1). I also like to refer to MOS often remark "How to add Exadata Storage servers using disks 3 TB for an existing database Machine (Doc ID 1476336.1)" what grid addition of disc or resize operations. The use case may not match, but several steps in this note are useful as discusses adding new disks to grid and treats even to create a new group of disks for occasions when you have discs of cells of different sizes.

  Be sure also to that you stick to Exadata recommended for storage as described in "Oracle Exadata Best Practices (Doc ID 757552.1). For example, the total number of griddisks by server storage for a prefix name given (for example: DATA) must match on all storage servers where the given prefix name exist. Also, for best performance you should have each grid prefix disc and corresponding disk group, spread evenly over each cell storage. You will also need to maintain the integrity of the group fail, separation of groups fail by the bin to the loss of cells without losing data.

  Hope that helps. Good luck!

  -Kasey

• What is the last level of patch bundle for x 3-2 exadata machine? How to find the doc?

  We have a x 3-2 exadata machine. I have a question: what is the last level of patch bundle for x 3-2 exadata machine? How to find the doc?

  Thanks in advance.

  Check note id 888828.1

  It has all the information you need.

• Exadata - databases how?

  Hi members,

  Exadata has amazing hardware specifications for eg - even the smallest config - Exadata X 3-2 c RAC has:

  Storage servers 3 DB 2 with very large storage, pci cards, faster servers infiband network etc...

  Now my question...

  (1) if these materials are used to only run a DB (which can actually be requiring a high-end configuration)?

  (2) what is the real meaning of 2 DB servers? You can use it to implement two node RAC [Server assuming 1 DB for a single node] system?

  (3) these DB servers can are accessible individually to run in a heterogeneous environment of the databases such as the use of 1 DB for 1 database server...

  Or is it just a plain pre-configured, "no changes could be made" system?

  I'm just a beginner so please help me to clarify my doubts...?

  Hello user12054962,

  (1) if these materials are used to only run a DB (which can actually be requiring a high-end configuration)

  A quarter rack gives you two database servers.  You can run a single database, or several, depending on your choice.  The main factor governing the maximum shadow of databases is generally the amount of memory on the servers, so I wouldn't say thousands of databases running on a single server.

  (2) what is the real meaning of 2 DB servers? You can use it to implement two node RAC [Server assuming 1 DB for a single node] system?

  You get two physical servers that are running the Oracle database software.  You can indeed set a node two RAC system, and this is the most common configuration.

  (3) these DB servers can are accessible individually to run in a heterogeneous environment of the databases such as the use of 1 DB for 1 database server...

  Altogether.  Or just run several databases on your two-node RAC system.

  Oracle RAC documentation has more information on the differences between the servers, clusters, instances and databases.

  HTH!

  Marc

• How to find the version of Exadata database machine (whether X 2 or X 3 etc?)

  People,
  
  Y at - it a command that can tell us the Exadata Database machine to show it is V2, X 2 or X 3?
  
  The imageinfo command does not show this information.
  
  Appreciate any help on this.
  
  Kind regards
  Sameer

  Hi Sameer,

  This topic has been discussed on this forum last month, with some good ideas:

  Exadata version

  Also note that the V2 and X 2 have gone through several rounds of material during their life, so not all machine V2 have the same CPU features, for example.

  See you soon!

  Marc

• Can we connect Exalogic and Exadata Machines?

  Hi Experts,
  
  
  We will connect Exalogic and Exadata for our new application. Is this possible? can leverage us Infiniband switch capacity?
  
  See you soon,.
  Kumar

  Hi friend

  It is possible.

  You can interconnect the Exalogic to Exadata Database Machine machine and take advantage of the high bandwidth of the InfiniBand fabric for demand for communication of data base and low latency.

  For more information, see the technical documentation for Oracle.

  It could be that useful...

  Thank you
  LaserSoft

• All dynamic views for (Exadata) Flash using the Cache?

  All,
  
  Although it is one of the main points of sale of Exadata (especially of the X 3 from), I am struggling to find much information about our use of the Exadata Smart FlashCache (I'm under RDBMS 11.2.0.2 BP7 on a quarter V2-rack).
  
  I can check the FlashCache usage by checking if the object has been "pinned" to the FlashCache via DBA_SEGMENTS and I use FlashCache can check by querying a gv$ sysstat (and even v$ mystat), but are there other views that I could use? It seems a little strange for Oracle is not to enlighten the DBA on their use of this feature...
  
  Mark

  Hi Mark,

  My colleague Christo Kutrovsky put in place a script smart to collect this info of storage servers and accessed as an external table: http://www.pythian.com/blog/whats-in-your-exadata-smart-flash-cache/

  HTH!

  Marc

• Oracle EXADATA database

  Hi, I'm doing research on which impact would be in my (ETL) application to Oracle EXADATA.
  
  How, where can I find information on this topic?
  
  Thanks in advance

  As says the famous phrase: "Exadata is still Oracle!
  In other words, your application will most likely work the same as before - but 10 times faster :)

  Seriously, you gave us too few details to say something specific.

  A single point: ETL has generally flat files involved. You would put them in DBFS on Exadata.
  If you have not yet heard about this: it looks like a regular file system for your ETL process, but it spans disks (almost) all storage servers.

  Kind regards
  Uwe Hesse

  "Don't believe it, try it!
  http://uhesse.com

• Exadata - unix admin responsobility

  Dear experts,
  I'm completely new to this forum. My skill set is HP - UX. but now, according to my new project, I have to work on a new project call exadata. My part will not be as s/n, but I have to work on the Unix administration. I have very little information that the operating system is Solaris. so I'm also learning Solaris administration. Those working on Exadata can you please guide me as a unix administrator what are the day to day activities the day on exadata... If you have any pdf/url where I can get some idea please let me know.
  
  Kind regards
  ANI

  Hi Ani,

  can you please guide me as a unix administrator what are the day to day activities the day on exadata?

  The most complete answer would be in this blog from Arup Nanda.
  http://Arup.blogspot.com/2011/07/who-manages-Exadata-machine.html

  Kind regards

  Tycho

• Exadata characteristic and execution of study plan

  Hi all
  
  I have questions about Exadata functionality.
  We have meet a performance problem in the current system and to improve the system. We are studying how much benefits that Exadata can give.
  After reviewing the daily execution of the SQL statement, we find that there is certain amount of "index range scan", operation "index full scan" (from execution plan). Exadata helps these operation (e.g. smart scan)? On the other hand, it is that all execute SQL (for example the full table scan) can be advantage in using Exadata?
  
  Thank you and best regards,
  M.T.

  903714 wrote:
  Dear christian Christmas Pal Singh,

  Thanks for your information.
  Currently, the SPA is not available for evulation. It is any document describe what type of operation (e.g. Index scan interval, scan of table full) Exadata eligible in terms of performance?

  Kind regards
  M.T.

  Yes, you can have simulation setting CELL_OFFLOAD_PLAN_DISPLAY to always. With this setting at the level of the session we could see change explain the plan, such as optimizer would think exadata is available.

  Please note that oracle would not recommend to use/infact analyzes all your indexes in Exadata, because by FTS is much more effective in Exadata. Once you have moved your application to Exadata, you apply main index in INVISIBLE mode and the benefits you get (there would be huge :)).

  Also check
  http://Antognini.ch/2010/04/Exadata-storage-server-and-the-query-optimizer-part-1/