With the help of Flashback Database with Yvert

Similar Questions

• Why the arhivelogs are required for the execution of FLASHBACK database

  Please explain. Thank you.

  Assume, flashback journal contains two images for block of data before: with YVERT 100 and 200. You want to flashback to 150 YVERT. After the flashback to 100 YVERT, redo apply will be required up to 150 YVERT.

• With the help of various databases for an application from merger web ADF

  Hi all
  
  Here's the thing. Following some steps in a book of developing an application, and I must say looks really good, so I thought why not just change a little bit and use it for the company, I work for. Main problem is, the book uses the HR schema, and I want to use the database of the company. Is - it possible and what losses are should I watch? What are the areas that I need to fix?
  
  Thanks in advance to all

  dino2dy,

  What are the areas that I need to fix?

  Not much, just the design of database components business, provisions of screen, workflows and business logic (in other words, just about everything)

  The best thing to do would be to make the teachings of the book how to develop such an application, and then use what you learned to develop your application. There may be utility classes, techniques, layouts, etc that you could reuse the book maybe.

  John

• Files without a NAME during the Flashback Database

  Hi all

  Why, in flashback, database, retrieve a tablespace has dropped the datafile (s) consisting of within table get renamed to UNNAMEDnnn? I was going through some examples on the internet but did not find any concrete reason as to why this happens during the flashback recovery. If the tablespace can be recreated during the process, why not data files that compose?

  Could someone help me please in my understanding.

  Thank you.

  Prithwish Adhikari wrote:

  Hello

  I was talking about the flashback database to retrieve a tablespace has fallen. Please find below the link

  http://www.DBA-Oracle.com/t_rman_159_restore_dropped_tablespace.htm

  My question is

  "

  flashback

  database to the SNA 460217.

  database of flashback to the SNA 460217

  *

  ERROR on line 1:

  ORA-38795: WARNING: flashback has managed but open resetlogs would get error

  below

  ORA-01245: offline file 5 will be lost if resetlogs is done

  ORA-01111: name for the data file 5 is unknown - rename it to the correct file

  ORA-01110: data file 5: ' / u01/oracle/product/10.2.0/db_1/dbs/UNNAMED00005'

  "

  Why, in flashback, database, the data file associated with the storage space gets renamed to unnamed?

  Thanks for the link and new info.

  The reason is the same as in these quotes from doc that I have provided. As ORA-01111 indicates the name of the actual file is unknown so Oracle creates a unique name, then stops recovery so that you can provide the name and location.

  Why, during the flashback database, retrieve a tablespace has fallen...

  This formulation and the wording of the article, is probably what is mislead you. You cannot recover a tablespace using FLASHBACK DATABASE:

  Here is the doc for FLASHBACK DATABASE

  http://docs.Oracle.com/CD/B28359_01/backup.111/b28273/rcmsynta023.htm

  Notes A Flashback Database use operation applies to the entire base. You cannot flash back, individual storage spaces. A Flashback Database operation is similar to a point-in-time data recovery (DBPITR) with RECOVER , but RMAN uses flashback logs to undo changes to a point before the time runs out or SNA

  See that second sentence? You NEED to recover the entire database and, as this quote from doc says, made it like CAMILLE by RECOVER.

  In this example, the storage space AND data files were dropped. So please check the doc to DROP TABLESPACE

  https://docs.Oracle.com/CD/B28359_01/server.111/b28286/statements_9004.htm

  Oracle database deletes all metadata about the space of storage data files and all the data dictionary tempfiles in the tablespace. The database also automatically removes the operating system all data files managed by Oracle and tempfiles in the tablespace. Other data files and tempfiles are not removed from the operating system unless you specify INCLUDING CONTENTS AND DATAFILES .

  See? No additional data in the dictionary for the tablespace or data files. Real datafiles is more if they were managed by Oracle. But there MAY be data files of the operating system if you do NOT use this last clause.

  If Oracle recreates the files using unique names and then allows you to CONFIRM that the name and location should really be.

  You have a problem with that? Or just try to understand?

• How to stop the mapping files from database BDB?

  We have a problem where physical memory on Windows (NT Kernel 6 and more, e.g., Windows 7, 2008R2, etc.) gets maxed out after a while when our application running.  On a 8 GB machine, if you look at our process of loading of BDB, is only about 1 GB. But when you look at using RAMMAP memory, you can see that the BDB database files (files not shared region) are mapped into memory, and it is the place most of the memory consumption.  I don't normally care like mapping memory can have performance benefits and ease of use. But the results are provided by the system to an abrupt stop.   This happens when we are inserting results in high order, e.g. 10s of millions of records in a short period of time.

  I would attach a photo in this post, but for some reason the insert image is grayed out.

  Open environmental indicators: DB_CREATE | DB_INIT_LOCK | DB_INIT_LOG | DB_INIT_TXN | DB_INIT_MPOOL | DB_THREAD | DB_LOCKDOWN | DB_RECOVER

  Flags the database open: DB_CREATE | DB_AUTO_COMMIT

  An update for the community

  Cause

  We opened a request for assistance (SR) to work with Oracle on the matter. The conclusion that we arrived that was the main reason for the Windows System Cachememory consumption.  (For reference, see http://support.microsoft.com/kb/976618) When opening files in buffer mode, the equivalent call CreateFile without specify FILE_FLAG_NO_BUFFERING, all i/o to a file through the Windows System Cache.  More database file, more memory is used to support.  This is not the same as memory mapped files, which Berkeley will use for the files of the region (i.e. the environment.) Also use the memory, but because they are limited in size, will not cause a problem (for example need a larger environment, just add more memory).  The obvious reason to use the cache is significant workload for optimizations of performance, especially in reading.

  The downside, however, is that when there is an significant amount of e/s in a short period of time, this cache can get really full and can translate into physical memory being close to 100% used.  This has a negative impact on the entire system.

  Time is important because Windows needs time for active pages transition to pages pending that decreases the amount of physical memory.   What we have found, is that when our database has been installed on the FLASH drive, we could generate a lot more I/O and our tests might work in no time, but memory would get close to 100%. If we missed these same tests to drive slower, while the result was the same, i.e. inserted 10 million in data files, time takes a lot of time and memory usage does not approach even close to 100%. Note that we also see consumption memory occur when we use the hotbackup in the BDB library. The reason is obvious: in a short span of time, we read the entire file of BDB database that makes Windows use the system for her cache. Total amount of memory could be a factor as well. A system with 16 GB of memory, even with a FLASH drive, we had a hard time to reproduce the problem where climbs the memory.

  There is no Windows API that allows an application to control how system cache is reserved or usable or maximum for an individual file.  As a result, BDB has very well control refined this behavior on a basis of individual files.  BDB can only enable or disable buffering in total for a given file.

  Workaround

  At Berkeley, you can disable layouts buffer IO in Windows by specifying the DB_DIRECT_DB flag for the environment.  It is the equivalent of calling CreateFile with specifying FILE_FLAG_NO_BUFFERING.  All I/O is going straight to the disk instead of memory and all the I/O must be aligned to a multiple of the sector size of the underlying disk. (NTFS sector size is usually 512 or 4096 bytes and BDB normal page sizes are usually multiples of that, so for most, this should not be a matter of concern, but know that Berkeley will test this page size to ensure that it is compatible and if not it will disable silently DB_DIRECT_DB.)  What we found in our tests is that using the flag DB_DIRECT_DB had too much negative impact on performance with something else to FLASH disk and therefore cannot use it. We consider acceptable for FLASH environments where we generate significant I/O in short time.   We could not reproduce the memory effect when the database is hosted on a drive of SAN running 15K SAS, which is more typical and so close the SR.

  However, Windows has an API that control the amount large total system of the cache system to use space and we can experiment with this setting. Please see this http://support.microsoft.com/kb/976618 we will also experiment with the help of multiple database partitions so that Berkeley distributes the load to these other files possibly giving the delay of the system cache to move active pages in standby mode.

• FLASHBACK Database: rman vs. sql command differences

  I am new to Oracle and want to understand the difference and that is the correct way of rear turn signals to the database?
  
  
  RMAN command vs SQL command on the use of FLASHBACK DATABASE
  

   SQL> FLASHBACK DATABASE TO RESTORE POINT BEFORE_ONLINE_TEST;  {CODE} Vs 

  RMAN > run {}
  flashback database to restore the BEFORE_TEST_320130313 point;
  SQL ' alter database open resetlogs; }

   
  Referring this article on http://docs.oracle.com/cd/E11882_01/backup.112/e10642/rcmflash.htm#BGBDCAFA it says we can use both RMAN and SQL command for database flashback.
  
  Questions:
  
  1. Difference between using RMAN and SQL command on database flashback?
  
  2. When to use RMAN or SQL on the  database flashback?
  
  3. Which is the Oracle recommended or best way ?
  
  Edited by: Sivaprasad S on Mar 15, 2013 7:26 PM
  
  Edited by: Sivaprasad S on Mar 15, 2013 7:26 PM
  
  Edited by: Sivaprasad S on Mar 15, 2013 7:27 PM
  
  Edited by: Sivaprasad S on Mar 15, 2013 7:27 PM
  
  Edited by: Sivaprasad S on Mar 15, 2013 7:28 PM
  
  Edited by: Sivaprasad S on Mar 15, 2013 7:29 PM                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            

  So when you run your SQLPlus flashback, you get the following error:

  ORA-38761: redo log sequence 1 in thread 1, incarnation 3 could not be found

  This means so that the sequence 1 has probably been removed from the disk and is necessary.

  When you run the RMAN command look at the log what RMAN:

  * journal archived for thread 1 sequence 2 is already on the disc in the file +DG_PERF_FLASH_02/TestDB/archivelog/2013_03_14/thread_1_seq_2.3612.810054205*
  * journal archived for thread 1 with sequence 3 is already on the disc in the file +DG_PERF_FLASH_02/TestDB/archivelog/2013_03_14/thread_1_seq_3.1588.810054205*

  So sequence 2 and 3 are already on record according to the above message.

  Then you get this message:

  channel dev_2: restoration of archives Journal
  Archives journal thread = 1 sequence = 1

  So RMAN knows he needs 1 thus sequence and restores this newspaper archive she needs for recovery.

  In a Word while running SQLPlus she communicate with RMAN and restore the log file for you, however with RMAN, it won't.

  You can restore the newspaper archive manually, and then run in SQLPlus that will then work.

  Published by: Freddie Essex on March 18, 2013 12:46

• Basic question about Flashback Database

  
  Hello

  I have a very generic question on the use of Flashback Database.

  On my systems tests, for use in testing and simulation performance, I want to create a guaranteed restore point so I can test impact on lot when releases of code changes are made before production deployment.  My confusion is in what regards newspapers of restoration, which are summarized in the following questions:

  1. is it possible to change the redo log files, when a guaranteed restore point has been configured?

  2. If so, is the Flashback to restore, point also change the size of the logs again?

  I found nothing in the documentation on this subject... Where my question...

  Appreciate your time taken to answer these questions...

  Kind regards.

  Hello

  donneskold wrote:

  Hello

  I have a very generic question on the use of Flashback Database.

  On my systems tests, for use in testing and simulation performance, I want to create a guaranteed restore point so I can test impact on lot when releases of code changes are made before production deployment.  My confusion is in what regards newspapers of restoration, which are summarized in the following questions:

  1. is it possible to change the redo log files, when a guaranteed restore point has been configured?

  (1) Yes it is possible.

  2. If so, is the Flashback to restore, point also change the size of the logs again?

  (2) it will not change the size of the redo log file.  Cannot resize a redo log file...

  I found nothing in the documentation on this subject... Where my question...

  Appreciate your time taken to answer these questions...

  Kind regards.

  Thank you

• ARCHIVELOG and flashback database

  Hello world
  
  I do not understand why the flashback database feature requires in archivelog mode.
  
  Could someone explain the reason?
  
  Thanks in advance

  This is explained in the documentation: Sur Flashback Database

  Therefore, at regular intervals, the database copy images of each block modified in each data file in the flashback logs. These block images can later be used to restore the contents of the data file from any time during which the logs were captured.

  When a database is restored to its State at some time target using Flashback Database, each block has changed since that time is restored from the copy of the block in the flashback logs more immediately before the time of the desired target. The redo log is then used to re - apply the changes since the time this block was copied in flashback logs.

  Note:

  Newspapers of recovery must be available for the entire period caused by the flashback logs, either on tape or on disk. (In practice, however, redo logs are usually needed much longer retention of flashback target to support point-in-time recovery.)
  >

  Basically, flashback logs contain any changes for all points in time. That's why redo / archive logs are needed.

• Flashback database (unfinished flashback) possible?

  Hi guys,.
  
  a reading on the recovery area flash + flashback database.
  
  I wonder
  
  asumming a transaction have made some changes to errornouse quite the sum of table.
  
  restoration of a backup and recovery would be tedious.
  
  Therefore, a flashback database would be more appropriate.
  
  --------
  
  There is, however, other tables which I have used is not be affected by the command of flashback database.
  
  for example
  I table a, b, c, d, e, f, g, h, i, j
  (1) errors, changes to table a, b, c, d, e, f, g
  
  (2) dml of table h, i, j are carry on normally correctly
  
  (3) need to make a database of blowback for mistakes.
  
  but I don't want changes to the table for h, i, j to be affected.
  
  
  1st quarter) what should I do?
  is it possible to do an exclusion of the h, i, j table?
  I guess I have to
  
  (1) stop, table h, i, j exp
  (2) flashback db
  (3) table imp h, i, j
  (4) open db resetlog
  
  Q2) how would you?
  
  Please notify
  Kind regards
  noob

  There is no exclude no option in the Flashback Database. If the return of flame you your database at the moment, all the objects will be flashed at certain times and you will get your database version exactly as it was at that time

  - - - - - - - - - - - - - - - - - - - - -
  Kamran Agayev a. (10g OCP)
  http://kamranagayev.WordPress.com
  [Step by step installation Oracle Linux and automate the installation by using Shell Script | http://kamranagayev.wordpress.com/2009/05/01/step-by-step-installing-oracle-database-10g-release-2-on-linux-centos-and-automate-the-installation-using-linux-shell-script/]

• Need the pdf file must be stored directly in the database with the help of jasper

  I use the package of integration of jasper... www.opal-consulting.de
  using apex 4 and am now able to generate the invoice pdf... with the help of jasper and store it in a database... Board.
  
  I need to generate the pdf in the background... without dispalying invoice in my screen...
  Without having to download on my computer... And store directly in the database table.
  *.. *
  
  Is this possible...
  All information is very appreicated.
  
  
  Here is my part existing code... Kindly Guide.
  
  
  DECLARE
  l_blob BLOB;
  l_mime_type VARCHAR2 (100);
  BLOB l_blob2;
  l_mime_type2 VARCHAR2 (100);
  MPort varchar2 (200);
  mrserver varchar2 (20);
  BEGIN
  Warn('fsubdno'||:P103_SUBSCRIBERDNO);
  commit;
  mrserver: = rserver();
  MPort: = ' http://'|| mrserver | ' / JasperReportsIntegration/report ';
  
  
  ------------------------------------------------------------------------
  -generate the report and return to BLOB
  ------------------------------------------------------------------------
  xlib_jasperreports.set_report_url (mport);
  Warn ('firststrikeeee');
  
  xlib_jasperreports.get_report
  (p_rep_name = > 'reinvx',)
  p_rep_format = > "pdf."
  p_data_source = > 'failures. "
  p_rep_locale = > 'de_DE ',.
  p_rep_encoding = > 'UTF - 8',
  p_additional_params = > ' & Psubscribe_no ='. : P103_SUBSCRIBER_NO | ' & Psubscribed_no ='. : P103_SUBSCRIBERDNO,.
  p_out_blob = > l_blob,
  p_out_mime_type = > l_mime_type
  );
  WPG_DOCLOAD.download_file (l_blob);
  Warn ('secondstrikeee');
  
  WPG_DOCLOAD.download_file (l_blob);
  BLOB_LOADB (MID (),: P103_SUBSCRIBER_NO, NULL, 'RENEWAL_INVOICE', 'RENEWALINV' |: P103_SUBSCRIBER_NO, L_MIME_TYPE, L_BLOB);
  ------------------------------------------------------------------------
  -free resources
  ------------------------------------------------------------------------
  DBMS_LOB.freeTemporary (l_blob);
  ------------------------------------------------------------------------
  -judgment of the APEX page
  ------------------------------------------------------------------------
  apex_application.g_unrecoverable_error: = TRUE;
  EXCEPTION
  WHILE OTHERS
  THEN
  xlog (SQLERRM, "PRC_GET_REPORT_TUNNEL", "ERROR");
  LIFT;
  END;
  
  Published by: susf on 16 July 2012 08:47

  Hello

  try to do a procedure from your original like this code:

  procedure make_pdf(p_subscriber_no in number, p_subscriberdno in number)
  is
     l_blob blob;
     l_mime_type varchar2 (100);
     l_blob2 blob;
     l_mime_type2 varchar2 (100);
     mport varchar2(200);
     mrserver varchar2(20);
  begin
     warn('fsubdno'||p_subscriberdno);
     commit;
     mrserver := rserver();
     mport := 'http://'||mrserver||'/jasperreportsintegration/report';
     -- generate the report and return in blob
     xlib_jasperreports.set_report_url (mport);
     warn('firststrikeeee');
  
     xlib_jasperreports.get_report
        (p_rep_name => 'reinvx',
        p_rep_format => 'pdf',
        p_data_source => 'chess',
        p_rep_locale => 'de_de',
        p_rep_encoding => 'utf-8',
        p_additional_params => '&Psubscribe_no='||p_subscriber_no||'&Psubscribed_no='||p_subscriberdno,
        p_out_blob => l_blob,
        p_out_mime_type => l_mime_type
        );
     blob_loadb (mid(),p_subscriber_no,null,'renewal_invoice','renewalinv'||p_subscriber_no,l_mime_type,l_blob);
     -- release resources
     dbms_lob.freetemporary (l_blob);
  exception
     when others
     then
        xlog ('prc_get_report_tunnel', sqlerrm, 'error');
        raise;
  end;
  

  Then, you can call this procedure in a database job that you create with an apex as this process:

  begin
    dbms_scheduler.create_job (
      job_name        => 'make_pdf_job',
      job_type        => 'PLSQL_BLOCK',
      job_action      => 'begin make_pdf(' || :P103_SUBSCRIBER_NO || ',' || :P103_SUBSCRIBERDNO|| ') end;',
      start_date      => systimestamp,
      repeat_interval => null,
      end_date        => null,
      enabled         => true,
      comments        => 'Make pdf job from Apex page 103.');
  end;
  

  Kind regards
  Erik-jan

• Problem with the help of oraext: query-database in the transformation (XSLT 2.0)

  Hello!
  I m facing a problem with the help of oraext: query-database.
  
  In my transformation im try the following (Simplified):
  

  <xsl:template match="*">
    <xsl:variable sqlQuery="select ....."/>
    <xsl:variable name="storeSec" select="oraext:query-database($sqlQuery,true(),true(),'jdbc/xref')/>               
      <xsl:choose>
       <xsl:when test="string-length($storeSec/ROWSET/ROW[1]/STORE_PART_SECTION) > 0">
            <xsl:value-of select="$storeSec/ROWSET/ROW[1]/STORE_PART_SECTION"/>
       </xsl:when>
         <xsl:otherwise>
              <xsl:value-of select"some other val"/>
         </xsl:otherwise>
      </xsl:choose>
  </xsl:template>
  {code}
  
  This always results in +some+ +other+ +val+ !!
  I´v checked the output from oraext:query-database by using getcontentAsString and if I instead test putting the expected output from oraext:queryDatabase in my variable it gives me A100 which is what i expected.
  
  {code}
  <xsl:template match="*">
    <xsl:variable sqlQuery=select ....."/>
    <xsl:variable name="storeSec">
      <ROWSET>
       <ROW num="1">
         <STORE_PART_SECTION>A100</STORE_PART_SECTION>
       </ROW>
       <ROW num="2">
         <STORE_PART_SECTION>XXm</STORE_PART_SECTION>
       </ROW>
      </ROWSET>
    </xsl:variable>               
      <xsl:choose>
       <xsl:when test="string-length($storeSec/ROWSET/ROW[1]/STORE_PART_SECTION) > 0">
            <xsl:value-of select="$storeSec/ROWSET/ROW[1]/STORE_PART_SECTION"/>
       </xsl:when>
         <xsl:otherwise>
              <xsl:value-of select"some other val"/>
         </xsl:otherwise>
      </xsl:choose>
  </xsl:template>

  How to get the correct value when you use oraext:query - database?

  How should you exit? Several item ID with each having a value of the result set?
  If Yes, then you can try following:

• With the help of connections to database for the safety of the ADF

  Hi all
  
  I have a request of 11g ADF (11.1.1.2.0) that uses the security of ADF and authenticate via LDAP against an Oracle Internet Directory. Now, we have an obligation to authenticate Oracle database users and remove the need to use the OID. Is it possible to do this in WebLogic?
  
  I know that if I maintain my own tables with user name and password in the form of columns, I use a SQLAuthenticator as described here:
  http://Biemond.blogspot.com/2008/12/using-database-tables-as-authentication.html
  
  But in my case I don't have my own table 'users', I actually want to use RDBMS users (just like Oracle Forms only). Has anyone written an authenticator class that can do this?
  
  See you soon

  Hello

  Oracle Forms keeps a user login to the database schema - so it performs no authentication. If you want the personal connection, then security ADF isn't the riht place to look for that but referrals under ADF BC dynamic JDBC

  To perform authentication against the schema of a database without connecting to the application to it (only for authentication pupose), you will need to write a provider of custom authentication (a JAAS login Module) for WLS wrapped. Then, this can be configured using the WLS console and authenticate the user session. This can then be used to authenticate the security of the ADF. See the documentation for WLS for how to write custom authentication providers

  Frank

• With the help of CardFile.exe in Windows8

  I copied the file *.exe, the help file and a *. CRD file (this is the database) in a separate folder in Windows 8, but when I try to run the program I get an error message stating that the program is not compatible with Windows 8.

  Hi Edward,.

  Thanks for posting your query in Microsoft community Forums.
  I understand that you have a problem with using Cardfile.exe; I will guide you with this.

  I suggest to try to refer the link for compatibility of programs:

  Method 1:

  http://Windows.Microsoft.com/en-us/Windows-8/what-program-compatibility

  I also suggest you try below link which is shown below:

  Method: 2

  http://Windows.Microsoft.com/en-us/Windows-8/older-programs-compatible-version-Windows

  It will be useful. If the problem persists, please do not hesitate to answer. I'd be happy to help you further.

• With the help of Control Source of Robo - project record

  There are two writers working on an HTML project, both using Source control explore 3.8 with RoboHelp 6. I was the creator of the project and added to Source code control.
  
  When another writer click on the button "save all", it takes 20-30 minutes until registration ends (when the hourglass disappears), allowing him to work again in the project.
  
  I have no problem with the backup. The Source code control database is on a separate server from one of our machines.
  
  We are new to this workflow, so it could very well be something done out of ignorance, but mine works fine and I installed the software on the other machine and has helped put in place under Version control.
  
  In the Task Manager CPU usage is up with the RoboHTML process using about 95 percent. I don't see anything different in his installation/configuration that should cause this. All suggestions, ideas, would be most appreciated.

  A good starting point would be to have your colleague to rebuild his CPD record. (In this order: make a backup copy of the project, check all of the files, close the project, delete the PCD file, and then reopen the project.)

  RoboHelp will rebuild the cpd file when it opens the project. Depending on the size of the project, it can go fast (almost imperceptible) to VERY slow (hours). Spin for as long as it takes this time - the following instances of the opening of the project should be normal.

  HTH,
  G

• My AirPort Extreme end not implemented with the help of AirPort Utility

  Bought a used AirPort Extreme (Genesis 4) of a person who showed me that he worked at home. When I try to set up as a Wireless extender to my last existing AirPort Extreme, he will not carry out synchronization upward with AirPort Utility. It appears as a new extreme, but get a message 'unexpected error' before or after the name. Have you tried to reset the two while it is powered and turning the as explained in the help.

  When I try to set up as a Wireless extender...

  Gen 4 airport will connect to your existing AirPort Extreme wireless... or... it will connect using wired Ethernet wired, Permanent?

  .. .it will not accomplish the synchronization upward with AirPort Utility.

  Which version of AirPort Utility?  If it's on your Mac... and you don't know what version you have...

  Open AirPort Utility

  Click the AirPort Utility menu in the upper left corner of the screen

  Click on about AirPort Utility

  Report on the version number you see here

  You have an iPhone or a handy iPad that could be used to implement the 4th Gen airport if the problems continue with the help of your Mac?