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Re: Informix Database testing

Posted By: medkba
Date: Wednesday, 24 July 2013, at 11:06 a.m.

In Response To: Re: Informix Database testing (Art Kagel)

Server administrator copied from source server to destination server. What
I understand if the database online and we copied informix db files to
destination server and we may not startup database due to data file corrupt
or some other reason. Am I correct?

Thank you very much

On Wed, Jul 24, 2013 at 10:54 PM, Art Kagel <art.kagel@gmail.com> wrote:

> ?? I'm not sure that I understand the question, but I'll try to answer
> with a guess.
>
> The only way to copy the server safely while it is online (without blocking
> it) and be able to restore the files to another machine and bring the copy
> up is to use ontape or onbar to make a full archive of the source server,
> restore that archive to the target machine, modify the sqlhosts file (and
> possibly the onconfig file). Then you can start up the copy.
>
> Art
>
> Art S. Kagel
> Advanced DataTools (www.advancedatatools.com)
> Blog: http://informix-myview.blogspot.com/
>
> Disclaimer: Please keep in mind that my own opinions are my own opinions
> and do not reflect on my employer, Advanced DataTools, the IIUG, nor any
> other organization with which I am associated either explicitly,
> implicitly, or by inference. Neither do those opinions reflect those of
> other individuals affiliated with any entity with which I am affiliated nor
> those of the entities themselves.
>
> On Wed, Jul 24, 2013 at 10:44 AM, medkba <medkba@gmail.com> wrote:
>
> > Art,
> >
> > If it is source database online at the same copy to destination source
> then
> > we cannot able to bring up destination server.
> >
> > No issue if partial data copy to destination server.
> >
> > Is it possible to bring up destination server database?
> >
> > Thank you very much
> >
> > On Wed, Jul 24, 2013 at 10:26 PM, Art Kagel <art.kagel@gmail.com> wrote:
> >
> > > No. As I stated in my last, the source server has to be either
> completely
> > > offline, or have completed a full checkpoint, having flushed everything
> > > modified in memory to disk, and blocked from further modifications on
> > disk
> > > in order for a file level copy to succeed in producing a usable copy of
> > the
> > > server's storage. The checkpoint and block are accomplished with the
> > > onmode -c block command and the block released with onmode -c unblock.
> > > While the server is blocked, transactions can continue against memory,
> > > however, eventually, if the block lasts for a long time and the server
> is
> > > busy, then when all buffer cache pages become dirty (ie modified) and
> new
> > > data needs to be read in from disk, all transactions and most queries
> > will
> > > also be blocked until the server block is released.
> > >
> > > Art
> > >
> > > Art S. Kagel
> > > Advanced DataTools (www.advancedatatools.com)
> > > Blog: http://informix-myview.blogspot.com/
> > >
> > > Disclaimer: Please keep in mind that my own opinions are my own
> opinions
> > > and do not reflect on my employer, Advanced DataTools, the IIUG, nor
> any
> > > other organization with which I am associated either explicitly,
> > > implicitly, or by inference. Neither do those opinions reflect those of
> > > other individuals affiliated with any entity with which I am affiliated
> > nor
> > > those of the entities themselves.
> > >
> > > On Wed, Jul 24, 2013 at 10:16 AM, medkba <medkba@gmail.com> wrote:
> > >
> > > > Hi All,
> > > >
> > > > Source database is up and running at the same time Storage
> > administrator
> > > > copy all the data (binary, raw device and other files) to destination
> > > > server but the OS and version and patch both are same as source and
> > > > destination.
> > > >
> > > > I am having doubt if the the database online. Is it copy properly on
> > the
> > > > destination server and able to up the database or not.
> > > >
> > > > My informix verison is 11.50 FC9 HP-UX
> > > >
> > > > SQLHOSTS file i have changed destination server name but the source
> > file
> > > is
> > > > up and running.
> > > >
> > > > Is it ok to change only the destination server name on the SQLHOSTS
> > file?
> > > > or miss out some other information to startup the database.
> > > >
> > > > Please advise
> > > >
> > > > Thank you very much
> > > >
> > > > Regards
> > > > Baskaran
> > > >
> > > > On Wed, Jul 24, 2013 at 10:07 PM, Art Kagel <art.kagel@gmail.com>
> > wrote:
> > > >
> > > > > IF and only IF the source database engine was offline or blocked
> > > (onmode
> > > > -c
> > > > > block) can a copy of the chunk files result in an engine that will
> > run
> > > > > properly unless you are very very lucky!
> > > > >
> > > > > That said, you will have to change the hostname in the sqlhosts
> file,
> > > > but,
> > > > > assuming that the chunk files were restored to the same path they
> > came
> > > > from
> > > > > or that the links for the chunk paths were properly linked up to
> the
> > > > > corresponding copy, then unless you want to change the servername
> or
> > > have
> > > > > another server online on that machine and need to change the
> > > > servernumber,
> > > > > all should work.
> > > > >
> > > > > Art
> > > > >
> > > > > Art S. Kagel
> > > > > Advanced DataTools (www.advancedatatools.com)
> > > > > Blog: http://informix-myview.blogspot.com/
> > > > >
> > > > > Disclaimer: Please keep in mind that my own opinions are my own
> > > opinions
> > > > > and do not reflect on my employer, Advanced DataTools, the IIUG,
> nor
> > > any
> > > > > other organization with which I am associated either explicitly,
> > > > > implicitly, or by inference. Neither do those opinions reflect
> those
> > of
> > > > > other individuals affiliated with any entity with which I am
> > affiliated
> > > > nor
> > > > > those of the entities themselves.
> > > > >
> > > > > On Wed, Jul 24, 2013 at 4:54 AM, medkba <medkba@gmail.com> wrote:
> > > > >
> > > > > > Hi All,
> > > > > >
> > > > > > We are having one server running informix database and system
> admin
> > > > > copied
> > > > > > all the files (binary with data) to other server same
> > configruation.
> > > > > >
> > > > > > Do I need to change any configuration before startup database?
> > > > > >
> > > > > > Any standard practice needs to do this
> > > > > >
> > > > > > Thank you very much
> > > > > >
> > > > > > Regards
> > > > > > Baskaran
> > > > > >
> > > > > > --089e0158ab6cae68cd04e23e0d42
> > > > > >
> > > > > >
> > > > > >
> > > > > >
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> > > > >
> > > >
> > > >
> > >
> > >
> >
> >
>
> *******************************************************************************
> > > > > > Forum Note: Use "Reply" to post a response in the discussion
> forum.
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> > > > > >
> > > > >
> > > > > --001a1133e414b78fef04e2426d01
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> > > > > Forum Note: Use "Reply" to post a response in the discussion forum.
> > > > >
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> > > > --001a11c34dec850cdf04e24289bd
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> > > > Forum Note: Use "Reply" to post a response in the discussion forum.
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> > > --047d7b3439a478642e04e242afdc
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> > > Forum Note: Use "Reply" to post a response in the discussion forum.
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> > --089e013c6b84fe6a4804e242d954
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> *******************************************************************************
> > Forum Note: Use "Reply" to post a response in the discussion forum.
> >
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> --089e013d1cf8fbd75304e2431237
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> *******************************************************************************
> Forum Note: Use "Reply" to post a response in the discussion forum.
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