Re: RE: convert big endian to medium endian

Only some additional information about the source DB: The db has about 4 million table/index partitions and every days will be created about 1 Thousand Partitions (I'm not sure whether this is good design). This could be maybe the reason why the metadata export is so slowly.

And to be honest the DBAs have already given some mos id for the datapump issue concerning the 11.2.0.4 version related to some x$k.. view. (I can't remember that now and I have now no access to my work email)

Ahmed Fikri <gherrami_at_gmail.com> schrieb am Fr., 7. Feb. 2020, 19:26:

> I write this email from an other email box(I'm in the train and the other
> app doesn't work now)
>
> Thanks a lot Lewis not only for your technical explanation but also for
> reading between the lines and understanding my real problem. (Even my
> broken English)
>
> Thanks and Regards
> Ahmed
>
> Jonathan Lewis <jonathan_at_jlcomp.demon.co.uk> schrieb am Fr., 7. Feb.
> 2020, 19:15:
>
>>
>> Your approach will not work because Oracle Corp. has not implemented an
>> "in situ" mechanism for reading and updating a system tablespace and data
>> dictionary that is in the wrong endian format. If they had produced such a
>> mechanism they would have been shouting about it because it would make it
>> much easier to migrate to Exadata from any alien platform.
>>
>> If your dba is an expert then they might have mentioned which version of
>> Oracle (11g is not a version, it's a marketing term), and which bug. There
>> are many known bugs relating to slow metadata export and many of those bugs
>> have patches. If your dba is a really expert expert they may even be able
>> to work out WHY the export is slow (if there isn't a patch to fix their
>> problem) and hack the data dictionary or supply SQL Patches to speed it up.
>>
>>
>> Regards
>> Jonathan Lewis
>>
>> ________________________________________
>> From: oracle-l-bounce_at_freelists.org <oracle-l-bounce_at_freelists.org> on
>> behalf of ahmed.fikri_at_t-online.de <ahmed.fikri_at_t-online.de>
>> Sent: 07 February 2020 17:16
>> To: Clay.Jackson_at_quest.com
>> Cc: oracle list
>> Subject: AW: RE: convert big endian to medium endian
>>
>> thanks for this information. But when I hear the only one way to do
>> something, I need to know why there is only one way. And why my approach
>> will not work.
>>
>> My problem is when using XTTS I should (from my understanding) export the
>> metadata using datapump and the problem this takes 3 days and 4 hours. And
>> from my understanding why should I export the metadata. Our DBA is an
>> expert and he told me the export takes long time because of known bug in
>> 11g. In the past I could copy databases using only cold backup, I could
>> copy the data files in parallel using several processes. I'm not a DBA (I
>> am from the application vendor installed on the db) but I read D. Kuhn book
>> from the beginning to the end. So I need to understand how to to do this
>> task: upgrading 11g on aix to 12g on linux in less than one weekend without
>> using the buggy datapump.
>>
>> this should be possible or not?The db is only 16tb big.
>>
>> regards
>> Ahmed
>>
>>
>>
>>
>> Gesendet mit der Telekom Mail App
>>
>>
>>
>> --- Original-Nachricht ---
>> Von: Clay Jackson (cjackson)
>> Betreff: RE: convert big endian to medium endian
>> Datum: 07.02.2020, 17:55 Uhr
>> An: oracle list
>>
>>
>> AFAIK:
>>
>> The only way this would work would be with transportable tablespaces;
>> either using the tablespaces, or RMAN (MOS 2013271.1).
>>
>> There’s no “silver bullet” for this…
>>
>>
>>
>> IMHO, your best choice is export/import with some sort of replication
>> solution to help minimize downtime.
>>
>>
>>
>> Clay Jackson
>>
>> Database Solutions Sales Engineer
>>
>> clay.jackson_at_quest.com
>>
>> office 949-754-1203 mobile 425-802-9603
>>
>> 
>>
>>
>>
>> From: oracle-l-bounce_at_freelists.org <oracle-l-bounce_at_freelists.org> On
>> Behalf Of ahmed.fikri_at_t-online.de
>> Sent: Friday, February 7, 2020 6:02 AM
>> To: oracle list <oracle-l_at_freelists.org>
>> Subject: convert big endian to medium endian
>>
>>
>>
>> CAUTION: This email originated from outside of the organization. Do not
>> follow guidance, click links, or open attachments unless you recognize the
>> sender and know the content is safe.
>>
>>
>>
>> Hi all,
>>
>> I want to test (I hope this weekend) following:
>> 1 from 12c Db on AIX (big endian) I will create a cold backup
>> 2 on Oracle linux (medium endian) I will create a new db using the cold
>> backup from point 1
>> 3 somehow I should convert the files from point 1 in medium endian
>>
>> is this possible?
>>
>> I don't want to use XTTTS and exporting the metadata using data pump.
>>
>> Kind Regards
>> Ahmed
>>
>>
>>
>>
>>
>> Gesendet mit der Telekom Mail App
>>
>>

--
http://www.freelists.org/webpage/oracle-l