Re: Uber migrated from Postgres to MySQL

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Marc Fournier
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Re: Uber migrated from Postgres to MySQL
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8CE821EF-EF01-4DBD-9570-195D5607B538@2ndquadrant.com
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Uber migrated from Postgres to MySQL Guyren Howe <guyren@gmail.com>
Re: Uber migrated from Postgres to MySQL "Joshua D. Drake" <jd@commandprompt.com>
Re: Uber migrated from Postgres to MySQL Chris Travers <chris.travers@gmail.com>
Re: Uber migrated from Postgres to MySQL Bruce Momjian <bruce@momjian.us>
Re: Uber migrated from Postgres to MySQL Bruce Momjian <bruce@momjian.us>
Re: Uber migrated from Postgres to MySQL Dorian Hoxha <dorian.hoxha@gmail.com>
Re: Uber migrated from Postgres to MySQL Rakesh Kumar <rakeshkumar464a3@gmail.com>
Re: Uber migrated from Postgres to MySQL "Joshua D. Drake" <jd@commandprompt.com>
Re: Uber migrated from Postgres to MySQL Rakesh Kumar <rakeshkumar464a3@gmail.com>
Re: Uber migrated from Postgres to MySQL Condor <condor@stz-bg.com>
Re: Uber migrated from Postgres to MySQL Achilleas Mantzios <achill@matrix.gatewaynet.com>
Re: Uber migrated from Postgres to MySQL Scott Mead <scottm@openscg.com>
Re: Uber migrated from Postgres to MySQL Bruce Momjian <bruce@momjian.us>
Re: Uber migrated from Postgres to MySQL Jerry Sievers <gsievers19@comcast.net>
Re: Uber migrated from Postgres to MySQL Stephen Frost <sfrost@snowman.net>
Re: Uber migrated from Postgres to MySQL Bruce Momjian <bruce@momjian.us>
Re: Uber migrated from Postgres to MySQL Rakesh Kumar <rakeshkumar464a3@gmail.com>
Re: Uber migrated from Postgres to MySQL Bruce Momjian <bruce@momjian.us>
Re: Uber migrated from Postgres to MySQL Bruce Momjian <bruce@momjian.us>
Re: Uber migrated from Postgres to MySQL Bruce Momjian <bruce@momjian.us>
Re: Uber migrated from Postgres to MySQL Marc Fournier <marc.fournier@2ndquadrant.com>
Re: Uber migrated from Postgres to MySQL Bruce Momjian <bruce@momjian.us>
Re: Uber migrated from Postgres to MySQL Rakesh Kumar <rakeshkumar464a3@gmail.com>
Re: Uber migrated from Postgres to MySQL Andrew Sullivan <ajs@crankycanuck.ca>
Re: Uber migrated from Postgres to MySQL Rakesh Kumar <rakeshkumar464a3@gmail.com>
Re: Uber migrated from Postgres to MySQL Bruce Momjian <bruce@momjian.us>
Re: Uber migrated from Postgres to MySQL Rakesh Kumar <rakeshkumar464a3@gmail.com>
Re: Uber migrated from Postgres to MySQL Bruce Momjian <bruce@momjian.us>
Re: Uber migrated from Postgres to MySQL Alex Ignatov <a.ignatov@postgrespro.ru>
Re: Uber migrated from Postgres to MySQL Rakesh Kumar <rakeshkumar464a3@gmail.com>
Re: Uber migrated from Postgres to MySQL Alex Ignatov <a.ignatov@postgrespro.ru>
Re: Uber migrated from Postgres to MySQL Igor Neyman <ineyman@perceptron.com>
Re: Uber migrated from Postgres to MySQL Alex Ignatov <a.ignatov@postgrespro.ru>
Re: Uber migrated from Postgres to MySQL Igor Neyman <ineyman@perceptron.com>
Re: Uber migrated from Postgres to MySQL Alex Ignatov <a.ignatov@postgrespro.ru>
Re: Uber migrated from Postgres to MySQL "D'Arcy J.M. Cain" <darcy@druid.net>
Re: Uber migrated from Postgres to MySQL Chris Travers <chris.travers@gmail.com>
Re: Uber migrated from Postgres to MySQL Scott Marlowe <scott.marlowe@gmail.com>
Re: Uber migrated from Postgres to MySQL Alex Ignatov <a.ignatov@postgrespro.ru>
Re: Uber migrated from Postgres to MySQL Rakesh Kumar <rakeshkumar464a3@gmail.com>
Re: Uber migrated from Postgres to MySQL Scott Marlowe <scott.marlowe@gmail.com>
Re: Uber migrated from Postgres to MySQL "Joshua D. Drake" <jd@commandprompt.com>
Re: Uber migrated from Postgres to MySQL Igor Neyman <ineyman@perceptron.com>
Re: Uber migrated from Postgres to MySQL Geoff Winkless <pgsqladmin@geoff.dj>
Re: Uber migrated from Postgres to MySQL Kevin Grittner <kgrittn@gmail.com>
Re: Uber migrated from Postgres to MySQL Andrew Sullivan <ajs@crankycanuck.ca>
Re: Uber migrated from Postgres to MySQL Patrick B <patrickbakerbr@gmail.com>
pg_upgrade and not working (was Re: Uber migrated from Postgres to MySQL) Andrew Sullivan <ajs@crankycanuck.ca>
Re: Uber migrated from Postgres to MySQL Kevin Grittner <kgrittn@gmail.com>
Re: Uber migrated from Postgres to MySQL Patrick B <patrickbakerbr@gmail.com>
Re: Uber migrated from Postgres to MySQL Alvaro Herrera <alvherre@2ndquadrant.com>
Re: Uber migrated from Postgres to MySQL Bruce Momjian <bruce@momjian.us>
Re: Uber migrated from Postgres to MySQL Geoff Winkless <pgsqladmin@geoff.dj>
Re: Uber migrated from Postgres to MySQL Andrew Sullivan <ajs@crankycanuck.ca>
Re: Uber migrated from Postgres to MySQL Geoff Winkless <pgsqladmin@geoff.dj>
Re: Uber migrated from Postgres to MySQL Scott Marlowe <scott.marlowe@gmail.com>
Re: Uber migrated from Postgres to MySQL James Keener <jim@jimkeener.com>
Re: Uber migrated from Postgres to MySQL Chris Travers <chris.travers@gmail.com>
Re: Uber migrated from Postgres to MySQL Edson Richter <edsonrichter@hotmail.com>
Re: Uber migrated from Postgres to MySQL Achilleas Mantzios <achill@matrix.gatewaynet.com>
Re: Uber migrated from Postgres to MySQL Chris Travers <chris.travers@gmail.com>
Re: Uber migrated from Postgres to MySQL Chris Travers <chris.travers@gmail.com>
Re: Uber migrated from Postgres to MySQL Vik Fearing <vik@2ndquadrant.fr>
Re: Uber migrated from Postgres to MySQL Tatsuo Ishii <ishii@sraoss.co.jp>
Re: Uber migrated from Postgres to MySQL Simon Riggs <simon@2ndquadrant.com>
Re: Uber migrated from Postgres to MySQL Tatsuo Ishii <ishii@sraoss.co.jp>
Re: Uber migrated from Postgres to MySQL Simon Riggs <simon@2ndquadrant.com>
Re: Uber migrated from Postgres to MySQL Tatsuo Ishii <ishii@sraoss.co.jp>
Re: Uber migrated from Postgres to MySQL Jerry Sievers <gsievers19@comcast.net>
Re: Uber migrated from Postgres to MySQL Condor <condor@stz-bg.com>
Re: Uber migrated from Postgres to MySQL Kevin Grittner <kgrittn@gmail.com>
Re: Uber migrated from Postgres to MySQL Marc Fournier <marc.fournier@2ndquadrant.com>
Re: Uber migrated from Postgres to MySQL "Greg Sabino Mullane" <greg@turnstep.com>
Re: Uber migrated from Postgres to MySQL Bruce Momjian <bruce@momjian.us>
Re: Uber migrated from Postgres to MySQL Jeff Janes <jeff.janes@gmail.com>
Re: Uber migrated from Postgres to MySQL John R Pierce <pierce@hogranch.com>
Re: Uber migrated from Postgres to MySQL James Keener <jim@jimkeener.com>
Re: Uber migrated from Postgres to MySQL Jeff Janes <jeff.janes@gmail.com>
Re: Uber migrated from Postgres to MySQL Bruce Momjian <bruce@momjian.us>
Re: Uber migrated from Postgres to MySQL Jeff Janes <jeff.janes@gmail.com>
Re: Uber migrated from Postgres to MySQL Bruce Momjian <bruce@momjian.us>
Re: Uber migrated from Postgres to MySQL Joe Conway <mail@joeconway.com>
Re: Uber migrated from Postgres to MySQL "Joshua D. Drake" <jd@commandprompt.com>
Re: Uber migrated from Postgres to MySQL John R Pierce <pierce@hogranch.com>
Re: Uber migrated from Postgres to MySQL Bruce Momjian <bruce@momjian.us>
Re: Uber migrated from Postgres to MySQL Kevin Grittner <kgrittn@gmail.com>
Re: Uber migrated from Postgres to MySQL Jason Dusek <jason.dusek@gmail.com>
Re: Uber migrated from Postgres to MySQL Gavin Flower <GavinFlower@archidevsys.co.nz>
Re: Uber migrated from Postgres to MySQL Jason Dusek <jason.dusek@gmail.com>
Re: Uber migrated from Postgres to MySQL "Maeldron T." <maeldron@gmail.com>
Re: Uber migrated from Postgres to MySQL Bruce Momjian <bruce@momjian.us>
Re: Uber migrated from Postgres to MySQL Larry Rosenman <ler@lerctr.org>
Re: Uber migrated from Postgres to MySQL "D'Arcy J.M. Cain" <darcy@druid.net>
Re: Uber migrated from Postgres to MySQL Bruce Momjian <bruce@momjian.us>
Re: Allowing multiple versions of PG under NetBSD "D'Arcy J.M. Cain" <darcy@druid.net>
Re: Allowing multiple versions of PG under NetBSD Larry Rosenman <ler@lerctr.org>
Re: Allowing multiple versions of PG under NetBSD Larry Rosenman <ler@lerctr.org>
Re: Allowing multiple versions of PG under NetBSD "D'Arcy J.M. Cain" <darcy@druid.net>
Re: Allowing multiple versions of PG under NetBSD Larry Rosenman <ler@lerctr.org>
Re: Allowing multiple versions of PG under NetBSD Kevin Grittner <kgrittn@gmail.com>
Re: Allowing multiple versions of PG under NetBSD Adrian Klaver <adrian.klaver@aklaver.com>
Re: Allowing multiple versions of PG under NetBSD Bruce Momjian <bruce@momjian.us>
Re: Allowing multiple versions of PG under NetBSD Larry Rosenman <ler@lerctr.org>
Re: Allowing multiple versions of PG under NetBSD Stephen Frost <sfrost@snowman.net>
Re: Allowing multiple versions of PG under NetBSD Thomas Munro <thomas.munro@enterprisedb.com>
Re: Uber migrated from Postgres to MySQL Achilleas Mantzios <achill@matrix.gatewaynet.com>
Re: Uber migrated from Postgres to MySQL Amitabh Kant <amitabhkant@gmail.com>

On Jul 27, 2016, at 00:15, Condor <condor@stz-bg.com> wrote:

On 26-07-2016 21:04, Dorian Hoxha wrote:
Many comments: https://news.ycombinator.com/item?id=12166585
https://www.reddit.com/r/programming/comments/4uph84/why_uber_engineering_switched_from_postgres_to/
On Tue, Jul 26, 2016 at 7:39 PM, Guyren Howe <guyren@gmail.com> wrote:
Honestly, I've never heard of anyone doing that. But it sounds like
they had good reasons.
https://eng.uber.com/mysql-migration/
Thoughts?
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They are right for upgrades.
It's a hard to shutdown 1 TB database and wait couple of days pg_upgrade to finish upgrade and meanwhile database is offline.
In some distros after upgrade of PG version you don't have old binary and library, need to do full dump and restore that take time and disk space.

Not having tried to use pg_upgrade on a 1TB database, this might not apply, but pg_upgrade has a —link option that should greatly minimize the time required to upgrade, since it eliminates the duplication of files … apparently even works on Windows:

“—link … use hard links instead of copying files to the new cluster (use junction points on Windows)"

In fact, the —link option should also mean removing the requirement for ‘double the disk space’ to do the upgrade …

I don’t have a 1TB database to try it on, mind you, so your ‘wait couple of days’ might be *with* the —link option?

--
Marc G Fournier                                               http://www.2ndQuadrant.com
PostgreSQL Development, 24x7 Support, RemoteDBA, Training & Services

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