TopLink grid 11g and data consistency affinity

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• TopLink grid 11g and transaction consistency

  During TopLink UOW is committed, only updated cache of transactional consistency? If the customer fails in the middle of TopLink UOW is committed, he let the situation that only partial objects are updated in the cache consistency? How TopLink manages the rollback to the cache consistency?

  In fact I miss - speak. In all cases TopLink will write only in cache coherence once all the writing to the database took place, although some entries are directed towards consistency. In the written case is directed to the consistency that we're investigating the TransactionCache to improve Atomic nature of the writing of coherence.

  If there is a failure of consistency after a base of data of TopLink writing consistency then native code will be necessary to force a reload of the entities that do not have consistent. The list of entities as part of the operation can be extracted from the UnitOfWork of the EntityManager

  -Gordon

• TopLink grid 11g: conversion of SQL queries to the filters of consistency

  I would like to know how efficient the conversion of SQL queries for filters of coherence is wen search an object in the cache coherence. TopLink does something as instruction cache cache filters consistency as well? In this regard, you have number of performance?
  
  Thank you very much!
  
  Ming-Wen

  TopLink grid currently has a rudimentary filter cache that allows TopLink to only translate NamedQuery once. This allows TopLink grid to reuse the same filter on subsequent runs of this NamedQuery.
  -Gordon

• Control grid agent and Data Guard in montage mode

  Hello
  
  I would like to know how you handle your data security when you don't have the license for the active data guard with grid control agents. The database pending is in montage mode, so the agents cannot query the database.
  
  What you guys do in such cases? Remove the agent? Or wait a failover?

  I think

  Sources:

  How to change the DBSNMP control user to another user for grid-control targets? [370234.1 ID]

  WARNING: The Dbsnmp user doesn't have privileges to monitor this data base [ID 604389.1]

  Best regards

  mseberg

• TopLink Grid: Create EntityManager fails when running on WebLogic

  Hello
  I am creating WebService that usus TopLink grid to access data. First of all I created simple stand-alone application with TopLink grid and all work very well. Then, I created WebService based on app created previously.
  When I try to run WebService deployed on WebLogic, I got error:
  "line Class ="Oracle.EclipseLink.Coherence.Integrated.config.GridCacheCustomizer"file =" GridCacheCustomizer.java "="30"method ="Customize. "
  java.lang.NoSuchMethodError org.eclipse.persistence.descriptors.ClassDescriptor.setFullyMergeEntity (Z) V
  It fails in the entityManagerFactory.createEntityManager () method.
  If deleted the eclipse configuration file - link.xml webservice customizer statement works. Maybe for server application needed some additional configuration or initialization?
  
  
  Thank you
  Alex
  
  Published by: user9360947 on March 29, 2012 06:09

  What is the version that you perform the deployment? The method not found was added in a later version, so it is probably there is a version mismatch where the Weblogic instance that is running and the version that you configured when running stand-alone. I think you need probalby use a version of Weblogic as 12.1.1 which comes with TopLink which includes EclipseLink 2.3.2 for this to work, or use a different version of EclipseLink which comes with the Weblogic instance that you are using. Tom described here:
  http://dev.Eclipse.org/mhonarc/lists/EclipseLink-users/msg06874.html

  Best regards
  Chris

• TopLink grid/JPA

  Hi all
  I use toplink grid grid read the weblogic server configuration + consistency.
  As soon as I load the cache using 'IgnoreDefaultRedirector' and redeploy the application, I get class cast exception. I use a distributed system.
  Can someone explain to work around this issue.
  Thank you
  Sainaba

  What are the details of the Exception. How is your consistency and TopLink grid packed? If consistency is on the classpath of the system, then you will need to shut down the server when the redeployment. If you set up consistency and TopLink grid as a shared library or package them as part of your application you do not meet the exception of class cast to the redeployment.
  -Gordon

• Clarification of grid Plug-and-Play (GPnP)

  I lu something on this introduced feature in Oracle 11 g R2 , I have not very clear that you can get When you add a new node to the cluster is configured automatically.
  I understand that using GNS , you can help reduce the cost of Management of IPs et is used with a DHCP server Server GNS sevice . But not if there is more feature that allows for a more powerful Management software in the installation management of ASM or RDBMS instances on the new server cluster .
  
  I would like to pourrait clarify if what is called Grid Plug and play is the GNS ()Grid naming Service) features?
  Or is it more Dynamics Management capacity of ?
  What role the negotiators, alias profile.xml profile file?
  
  Thank you.
  Best regards.
  Arturo
  
  

  Hello, Arturo.

  Negotiators and GNS are independent of each other

  From 11 GR 2 onwards, files with right to vote can be hosted on ASM. And the upcoming ASM to cssd demon. And for the cssd start the cluster needs to access files with right to vote.

  These voting files location information is stored in the profile of negotiators (grid Plug n Play) file.

  GNS, is for the resolution of the cluster name. For customers outside the cluster to find the virtual servers in the cluster, we provide a Naming Service (GNS) grid. It works with any level superior DNS to provide names can be resolved to external customers. DHCP provides dynamic configuration of the IP address of hosts, but does not provide a good way to produce names which are useful to external clients. Accordingly, it has been rare in the server complex. In Oracle 11g release 2 Clusterware (11.2), this problem is solved by providing clusterwares own service name in the cluster and this connection resolution DNS that is visible to customers.

  Ref: DNS and DHCP configuration example of Infrastructure of grid GNS (Doc ID 946452.1)

  Kind regards

  Vautrin - Oracle

• RAC + ASM: Grid OCR and VotingDisk - installer puts on simple Diskgroup

  Hi all
  
  It seems that the grid Setup does me not to choose/create more than 1 (one) Diskgroup OCR and voting disk. Am I missing something, or is it best practice?
  
  I thought it would have been good to multiplex OCR/vote at least 2 different ASM starts...
  
  I'm also confused because the oracle documentation says that, for most installations, starts at only 2 would be enough ("Data + index + LOBs" and "FRA").
  
  In a matter of fact, what I was planning to do is have 3 starts in this configuration (data, index + LOBs, FRA) and have OCR and vote multiplexes on TWO 'data' and 'Index + LOB '. But now I don't know if the sharing of data and indexes have a meaning, ASM...
  
  (1) that it makes sense (the fact I want to multiplex OCR + vote)?
  (2) how to achieve the result desired during the installation, if possible (multiplexing OCR + vote)?
  (3) to other recommendations (for example using a 4th Diskgroup, or should I use only 2 of them)?
  (4) with ASM, is it still wise to separate the data and the indexes on different starts?
  
  Thanks for your help

  Hello

  rlomba wrote:
  Hi all

  It seems that the grid Setup does me not to choose/create more than 1 (one) Diskgroup OCR and voting disk. Am I missing something, or is it best practice?

  My recommendation: this first diskgroup you can use to store your files with the right to vote and the OCR, and later, you can create another small diskgroup add OCR and move ASMSPFILE to this new diskgroup.

  Vote files can be stored in a single diskgroup.

  I thought it would have been good to multiplex OCR/vote at least 2 different ASM starts...

  I'm also confused because the oracle documentation says that, for most installations, starts at only 2 would be enough ("Data + index + LOBs" and "FRA").

  In a matter of fact, what I was planning to do is have 3 starts in this configuration (data, index + LOBs, FRA) and have OCR and vote multiplexes on TWO 'data' and 'Index + LOB '. But now I don't know if the sharing of data and indexes have a meaning, ASM...

  (1) that it makes sense (the fact I want to multiplex OCR + vote)?

  I really do not recommend putting database files and clusterware together. This may disturb the management of the environment and could dowtime. (for example, you can never stop the diskgroup)
  for example: files with right to vote are not stored in the diskgroup (+ data), they are placed directly into asmdisk, then in case of maintenance in the diskgroup, for example to increase the size of the lun, you can just delete the asmdisk, you must move the files with right to vote in another place and realize the diskgroup maintenance.

  Dowtime? Yes... You can move only the voice and the ocr without interruption of service, but to move ASMSPIFILE, you need downtime. This is necessary for ASM using new SPFILE and release the old Diskgroup. * ORA-15027: active use of the diskgroup opposes its release (with no connected customer database) [ID 1082876.1*]

  (2) how to achieve the result desired during the installation, if possible (multiplexing OCR + vote)?

  You can't get the result desired during installation, but you can reconfigure at the end of the installation.

  Read:
  {message: id = 10028550}
  I recommend you read the entire thread above

  (3) to other recommendations (for example using a 4th Diskgroup, or should I use only 2 of them)?

  My recommendation, OCR and ASM SPFILE (diskgroup1), MIRROR of the OCR and VOTING QUEUES (DISKGROUP 2), FILES of DATABASE (DISKGROUP3), ONLINELOG (4 Diskgroup in an array with RAID 10) and FRA (DISKGROUP 5)

  Read:
  {message: id = 9676881}

  (4) with ASM, is it still wise to separate the data and the indexes on different starts?

  If you use different tables in the storage of data and indexes, perhaps, but I recommend doing this only if you have performance issues and you did the test and know there will be benefits if you don't have a reason why I do not recommend this because it increases the administration of storage, ASM and data base.

  Read about the use of different tablespace for data and indexes.
  {: identifier of the thread = 2189138}

  More 1 diskgroup using database files must be careful, because the Oracle restore can only use a single diskgroup.
  http://levipereira.WordPress.com/2011/10/25/tip-hint-db_create_file_dest-behavior-when-using-ASM/

  Kind regards
  Levi Pereira

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  Hello!
  
  I hope that you could suggest an appropriate approach to make this request.
  
  We need treat and find data in XML files (which are consistent with an XSD) and store them in the database. There is a huge amount of XML files to deal with every day and these files are received through some messaging queues and must also be shipped to different queues.
  
  We use OSB as tool integration approach should therefore be centred OSB. I have now the OSB is able to process XML files through the XQuery expressions and store data in the database (at least to read the data, I don't know if she is able to insert data directly). But the problem I see, is that we have to analyze a lot of data of each XML file, so I think it could be very cunbersome to build all the XQuery expressions in a stadium of the OSB.
  
  Another approach, I thought consist of an MDB that receives XML, JAXB support building process and data stores files in the database. OSB could receive the queue of the original XML files, send them to the queue target as well as MDB to commit processing.
  
  What approach seems most suitable for you?
  
  Thank you.
  
  Daniel.

  The OSB database adapter would give you XSD modeling the tables that you want to insert. You can consider fields of mapping of the input XML to XSD data adapter directly.

  Come discover the database adapter, and you will find them easy.

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  Omari says:

  I want to delete unnecessary files in several applications under general > use storage and iCloud > manage storage, but the section documents and data for the respective applications will not operate.

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