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* Mixing DBLink versions
@ 2010-03-15 21:29 David Jantzen <djantzen@ql2.com>
2010-03-16 01:01 ` Re: Mixing DBLink versions Tom Lane <tgl@sss.pgh.pa.us>
0 siblings, 1 reply; 4+ messages in thread
From: David Jantzen @ 2010-03-15 21:29 UTC (permalink / raw)
To: pgsql-admin
Hi All,
Due to some historical idiosyncracies in our environment, we have a custom 8.3.7 database installation built from source. We'd like to install dblink into this, however there are some problems with doing so:
1) the 8.3.7 database was built on a CentOS 4 build box that has since gone away
2) currently we have only 8.3.9 code built against CentOS 5
3) the GCC compiler on CentOS 4 was quite old
4) possible API changes in dblink between those versions
My question, how risky would it be to copy the dblink.so and .sql files from the CentOS 5 compilation of Postgres 8.3.9 over to the CentOS 4 compilation of Postgres 8.3.7? If runtime errors result, how severe would they be? I.e., would they take down a postgres backend or possibly the postmaster daemon?
Thanks,
David
^ permalink raw reply [nested|flat] 4+ messages in thread
* Re: Mixing DBLink versions
2010-03-15 21:29 Mixing DBLink versions David Jantzen <djantzen@ql2.com>
@ 2010-03-16 01:01 ` Tom Lane <tgl@sss.pgh.pa.us>
2010-03-16 02:25 ` Re: Mixing DBLink versions David Jantzen <djantzen@ql2.com>
0 siblings, 1 reply; 4+ messages in thread
From: Tom Lane @ 2010-03-16 01:01 UTC (permalink / raw)
To: David Jantzen <djantzen@ql2.com>; +Cc: pgsql-admin
David Jantzen <djantzen@ql2.com> writes:
> Due to some historical idiosyncracies in our environment, we have a custom 8.3.7 database installation built from source. We'd like to install dblink into this, however there are some problems with doing so:
> 1) the 8.3.7 database was built on a CentOS 4 build box that has since gone away
> 2) currently we have only 8.3.9 code built against CentOS 5
> 3) the GCC compiler on CentOS 4 was quite old
> 4) possible API changes in dblink between those versions
> My question, how risky would it be to copy the dblink.so and .sql files from the CentOS 5 compilation of Postgres 8.3.9 over to the CentOS 4 compilation of Postgres 8.3.7? If runtime errors result, how severe would they be? I.e., would they take down a postgres backend or possibly the postmaster daemon?
I think you've got a fundamental problem that you'd better fix. If you
are unable to rebuild the database from source then you are unable to
update --- and you are already three minor versions behind and missing
multiple security and crash-risk bug fixes. You're living on borrowed
time, and NEED to reinstantiate your ability to build for that platform.
Or move to a newer one.
FWIW, you could probably get back a RHEL4 build environment pretty
cheaply by setting up a suitable "mock" chroot on a recent Fedora
version (installed on the same type of hardware).
As for your direct question: no, I wouldn't count on that to work.
RHEL4 and RHEL5 had different glibc versions didn't they?
regards, tom lane
^ permalink raw reply [nested|flat] 4+ messages in thread
* Re: Mixing DBLink versions
2010-03-15 21:29 Mixing DBLink versions David Jantzen <djantzen@ql2.com>
2010-03-16 01:01 ` Re: Mixing DBLink versions Tom Lane <tgl@sss.pgh.pa.us>
@ 2010-03-16 02:25 ` David Jantzen <djantzen@ql2.com>
2010-03-16 02:29 ` Re: Mixing DBLink versions Devrim GÜNDÜZ <devrim@gunduz.org>
0 siblings, 1 reply; 4+ messages in thread
From: David Jantzen @ 2010-03-16 02:25 UTC (permalink / raw)
To: Tom Lane <tgl@sss.pgh.pa.us>; +Cc: pgsql-admin
Thanks for the detailed response. We'll look at upgrading to 8.3.9 from an RPM.
On Mar 15, 2010, at 6:01 PM, Tom Lane wrote:
> David Jantzen <djantzen@ql2.com> writes:
>> Due to some historical idiosyncracies in our environment, we have a custom 8.3.7 database installation built from source. We'd like to install dblink into this, however there are some problems with doing so:
>
>> 1) the 8.3.7 database was built on a CentOS 4 build box that has since gone away
>> 2) currently we have only 8.3.9 code built against CentOS 5
>> 3) the GCC compiler on CentOS 4 was quite old
>> 4) possible API changes in dblink between those versions
>
>> My question, how risky would it be to copy the dblink.so and .sql files from the CentOS 5 compilation of Postgres 8.3.9 over to the CentOS 4 compilation of Postgres 8.3.7? If runtime errors result, how severe would they be? I.e., would they take down a postgres backend or possibly the postmaster daemon?
>
> I think you've got a fundamental problem that you'd better fix. If you
> are unable to rebuild the database from source then you are unable to
> update --- and you are already three minor versions behind and missing
> multiple security and crash-risk bug fixes. You're living on borrowed
> time, and NEED to reinstantiate your ability to build for that platform.
> Or move to a newer one.
>
> FWIW, you could probably get back a RHEL4 build environment pretty
> cheaply by setting up a suitable "mock" chroot on a recent Fedora
> version (installed on the same type of hardware).
>
> As for your direct question: no, I wouldn't count on that to work.
> RHEL4 and RHEL5 had different glibc versions didn't they?
>
> regards, tom lane
^ permalink raw reply [nested|flat] 4+ messages in thread
* Re: Mixing DBLink versions
2010-03-15 21:29 Mixing DBLink versions David Jantzen <djantzen@ql2.com>
2010-03-16 01:01 ` Re: Mixing DBLink versions Tom Lane <tgl@sss.pgh.pa.us>
2010-03-16 02:25 ` Re: Mixing DBLink versions David Jantzen <djantzen@ql2.com>
@ 2010-03-16 02:29 ` Devrim GÜNDÜZ <devrim@gunduz.org>
0 siblings, 0 replies; 4+ messages in thread
From: Devrim GÜNDÜZ @ 2010-03-16 02:29 UTC (permalink / raw)
To: David Jantzen <djantzen@ql2.com>; +Cc: Tom Lane <tgl@sss.pgh.pa.us>; pgsql-admin
On Mon, 2010-03-15 at 19:25 -0700, David Jantzen wrote:
> We'll look at upgrading to 8.3.9 from an RPM.
FWIW 8.3.10 was released today.
--
Devrim GÜNDÜZ
PostgreSQL Danışmanı/Consultant, Red Hat Certified Engineer
PostgreSQL RPM Repository: http://yum.pgrpms.org
Community: devrim~PostgreSQL.org, devrim.gunduz~linux.org.tr
http://www.gunduz.org Twitter: http://twitter.com/devrimgunduz
Attachments:
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^ permalink raw reply [nested|flat] 4+ messages in thread
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2010-03-15 21:29 Mixing DBLink versions David Jantzen <djantzen@ql2.com>
2010-03-16 01:01 ` Tom Lane <tgl@sss.pgh.pa.us>
2010-03-16 02:25 ` David Jantzen <djantzen@ql2.com>
2010-03-16 02:29 ` Devrim GÜNDÜZ <devrim@gunduz.org>
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