Обсуждение: replication from Oracle to PostgreSQL?
Hi All;
Anyone know of tools / options that will allow Oracle to PostgreSQL
replication? or at least a real time feed or dblink?
Thanks in advance...
--
---------------------------------------------
Kevin Kempter - Constent State
A PostgreSQL Professional Services Company
www.consistentstate.com
---------------------------------------------
On Thu, 2011-08-11 at 08:41 -0600, CS DBA wrote: > > Anyone know of tools / options that will allow Oracle to PostgreSQL > replication? or at least a real time feed or dblink? EnterpriseDB's Postgres Plus Advanced Server has a realtime replication solution bundled. Regards, -- Devrim GÜNDÜZ Principal Systems Engineer @ EnterpriseDB: http://www.enterprisedb.com PostgreSQL Danışmanı/Consultant, Red Hat Certified Engineer Community: devrim~PostgreSQL.org, devrim.gunduz~linux.org.tr http://www.gunduz.org Twitter: http://twitter.com/devrimgunduz
Вложения
> On Thu, 2011-08-11 at 08:41 -0600, CS DBA wrote:
>> Anyone know of tools / options that will allow Oracle to PostgreSQL
>> replication? or at least a real time feed or dblink?
> EnterpriseDB's Postgres Plus Advanced Server has a realtime replication
> solution bundled.
>
> Regards,
That was the first thing I tried to push 'em towards... they shut it
down cause it's not free (which is weird since they're not considering a
real TCO, but they are the customer).
--
---------------------------------------------
Kevin Kempter - Constent State
A PostgreSQL Professional Services Company
www.consistentstate.com
---------------------------------------------
On 08/11/2011 08:41 AM, CS DBA wrote: > Hi All; > > Anyone know of tools / options that will allow Oracle to PostgreSQL > replication? or at least a real time feed or dblink? > > > Thanks in advance... > I believe EnterpriseDB Advanced Server does it (http://www.enterprisedb.com/) -- Chris Ernst Data Operations Engineer Zvelo, Inc.
On Thu, Aug 11, 2011 at 3:41 PM, CS DBA <cs_dba@consistentstate.com> wrote: > Anyone know of tools / options that will allow Oracle to PostgreSQL > replication? or at least a real time feed or dblink? 2ndQuadrant has various in-house tools for fast migration from Oracle to PostgreSQL, but those aren't designed for long term co-existence, just for minimising the window of downtime at cutover. It's not been weaponised, so its not available for free download. -- Simon Riggs http://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Training & Services
On 08/11/2011 08:41 AM, CS DBA wrote: > Hi All; > > Anyone know of tools / options that will allow Oracle to PostgreSQL > replication? or at least a real time feed or dblink? > > > Thanks in advance... > SymmetricDS is capable of doing replication one DB to another, but I've never used it so cannot speak from experience. Mark
On 08/11/2011 07:57 AM, CS DBA wrote: > >> On Thu, 2011-08-11 at 08:41 -0600, CS DBA wrote: >>> Anyone know of tools / options that will allow Oracle to PostgreSQL >>> replication? or at least a real time feed or dblink? >> EnterpriseDB's Postgres Plus Advanced Server has a realtime replication >> solution bundled. >> >> Regards, > > That was the first thing I tried to push 'em towards... they shut it > down cause it's not free (which is weird since they're not considering a > real TCO, but they are the customer). I would aimagine it would be pretty simple to fork the triggers that do replication in Londiste or Slony (as long as everything else was PostgreSQL) to be able to replicate from Oracle to PostgreSQL. JD > > > > -- Command Prompt, Inc. - http://www.commandprompt.com/ PostgreSQL Support, Training, Professional Services and Development The PostgreSQL Conference - http://www.postgresqlconference.org/ @cmdpromptinc - @postgresconf - 509-416-6579
On 08/11/2011 03:58 PM, Joshua D. Drake wrote: > I would imagine it would be pretty simple to fork the triggers that do > replication in Londiste or Slony (as long as everything else was > PostgreSQL) to be able to replicate from Oracle to PostgreSQL. That's the approach taken by some of our in-house tools. "simple" wouldn't be the right word to describe the process that went into building them though. You have to get the basics working, then worry about non-deterministic statements (random, timestamps, etc.), sequencing, all of the stuff any statement based replication can be faced with--except now there's the quirks of two databases to worry about. One of the reasons Slony and Londiste statement extraction works as well as it does is because new functions were added to PostgreSQL 8.3 for them, to make it easier to get the sort of snapshot information needed to grab consistent copies of data. That problem comes back again when the origin database isn't a PostgreSQL one too. There are a couple of ways to solve this problem, but all of them are complicated enough that they're only sitting in commercial/consultant projects right now (in addition to ones mentioned here already, I'm sure Continuent has some applicable stuff too). I think Kevin's customer may be in for a surprise at how much it will cost to duplicate this feature set from scratch--I'd be surprised to see that total come in under what licensing an already built package would sell for. Companies who aren't willing to throw some money toward buying/customizing at least some PostgreSQL software, if it allows escaping from Oracle licensing, should reconsider their strategy. Not everything you'll want to make a conversion easy is going to be free. -- Greg Smith 2ndQuadrant US greg@2ndQuadrant.com Baltimore, MD PostgreSQL Training, Services, and 24x7 Support www.2ndQuadrant.us
On 11/08/2011 10:57 PM, CS DBA wrote: > >> On Thu, 2011-08-11 at 08:41 -0600, CS DBA wrote: >>> Anyone know of tools / options that will allow Oracle to PostgreSQL >>> replication? or at least a real time feed or dblink? >> EnterpriseDB's Postgres Plus Advanced Server has a realtime replication >> solution bundled. >> >> Regards, > > That was the first thing I tried to push 'em towards... they shut it > down cause it's not free (which is weird since they're not considering a > real TCO, but they are the customer). Using Oracle ... and objecting to "not free"? *boggle* There are lots of ETL tools available, and there's always the roll-your-own queue-based trigger replication system option. Of course, both options would probably cost more than buying EDB's already built and tested version... -- Craig Ringer
On 08/11/2011 08:09 PM, Craig Ringer wrote:
> On 11/08/2011 10:57 PM, CS DBA wrote:
>>
>>> On Thu, 2011-08-11 at 08:41 -0600, CS DBA wrote:
>>>> Anyone know of tools / options that will allow Oracle to PostgreSQL
>>>> replication? or at least a real time feed or dblink?
>>> EnterpriseDB's Postgres Plus Advanced Server has a realtime replication
>>> solution bundled.
>>>
>>> Regards,
>>
>> That was the first thing I tried to push 'em towards... they shut it
>> down cause it's not free (which is weird since they're not considering a
>> real TCO, but they are the customer).
>
> Using Oracle ... and objecting to "not free"?
That's why we're here - to help 'em migrate from Oracle to PostgreSQL,
it seems some systems will need a longer Oracle life due to other
constraints
>
> *boggle*
agreed
>
>
> There are lots of ETL tools available, and there's always the
> roll-your-own queue-based trigger replication system option. Of
> course, both options would probably cost more than buying EDB's
> already built and tested version...
>
interesting idea, any specific ETL tools you could recommend?
> --
> Craig Ringer
>
--
---------------------------------------------
Kevin Kempter - Constent State
A PostgreSQL Professional Services Company
www.consistentstate.com
---------------------------------------------
On 12/08/2011 10:40 PM, CS DBA wrote: >> There are lots of ETL tools available, and there's always the >> roll-your-own queue-based trigger replication system option. Of >> course, both options would probably cost more than buying EDB's >> already built and tested version... >> > interesting idea, any specific ETL tools you could recommend? The main open source ones I hear about are Talend (http://uk.talend.com/index.php) and Pentaho (http://www.pentaho.com/). These are the only two I hear of people on this list using, but that doesn't mean others don't see use too. Others found in a quick search include CloverETL (http://www.cloveretl.com/) and Aptar (http://apatar.com/). I'm sure there are tons more, but who knows what they're like. -- Craig Ringer