Re: Postgres as In-Memory Database?
От
Jeff Janes
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Re: Postgres as In-Memory Database?
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CAMkU=1wvpq8uy7oxQZFajtcJ5pF_TKkP_3M6DmS1Zwd3CkeM0A@mail.gmail.com
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Re: Postgres as In-Memory Database? (Edson Richter)
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Postgres as In-Memory Database? Stefan Keller <sfkeller@gmail.com>
Re: Postgres as In-Memory Database? rob stone <floriparob@gmail.com>
Re: Postgres as In-Memory Database? Edson Richter <edsonrichter@hotmail.com>
Re: Postgres as In-Memory Database? Stefan Keller <sfkeller@gmail.com>
Re: Postgres as In-Memory Database? Edson Richter <edsonrichter@hotmail.com>
Re: Postgres as In-Memory Database? Andreas Brandl <ml@3.141592654.de>
Re: Postgres as In-Memory Database? Edson Richter <edsonrichter@hotmail.com>
Re: Postgres as In-Memory Database? Andreas Brandl <ml@3.141592654.de>
Re: Postgres as In-Memory Database? Stefan Keller <sfkeller@gmail.com>
Re: Postgres as In-Memory Database? Andrew Dunstan <andrew@dunslane.net>
Re: Postgres as In-Memory Database? Jeff Janes <jeff.janes@gmail.com>
Re: Postgres as In-Memory Database? Stefan Keller <sfkeller@gmail.com>
Re: Postgres as In-Memory Database? Andrew Sullivan <ajs@crankycanuck.ca>
Re: Postgres as In-Memory Database? Stefan Keller <sfkeller@gmail.com>
Re: Postgres as In-Memory Database? bricklen <bricklen@gmail.com>
Re: Postgres as In-Memory Database? Stefan Keller <sfkeller@gmail.com>
Re: Postgres as In-Memory Database? Jeff Janes <jeff.janes@gmail.com>
Re: Postgres as In-Memory Database? Stefan Keller <sfkeller@gmail.com>
Re: Postgres as In-Memory Database? Jeff Janes <jeff.janes@gmail.com>
Re: Postgres as In-Memory Database? Yeb Havinga <yebhavinga@gmail.com>
Re: Postgres as In-Memory Database? Stefan Keller <sfkeller@gmail.com>
Re: Postgres as In-Memory Database? Florian Weimer <fweimer@redhat.com>
Re: Postgres as In-Memory Database? Stefan Keller <sfkeller@gmail.com>
Re: Postgres as In-Memory Database? Stefan Keller <sfkeller@gmail.com>
Re: Postgres as In-Memory Database? Hadi Moshayedi <hadi@citusdata.com>
Re: Postgres as In-Memory Database? Stefan Keller <sfkeller@gmail.com>
Re: Postgres as In-Memory Database? Andrew Sullivan <ajs@crankycanuck.ca>
Re: Postgres as In-Memory Database? Stefan Keller <sfkeller@gmail.com>
Re: Postgres as In-Memory Database? Andrew Sullivan <ajs@crankycanuck.ca>
Re: Postgres as In-Memory Database? Alban Hertroys <haramrae@gmail.com>
Re: Postgres as In-Memory Database? Stefan Keller <sfkeller@gmail.com>
Re: Postgres as In-Memory Database? Michael Paquier <michael.paquier@gmail.com>
Re: Postgres as In-Memory Database? Bruce Momjian <bruce@momjian.us>
Re: Postgres as In-Memory Database? Stefan Keller <sfkeller@gmail.com>
Re: Postgres as In-Memory Database? Edson Richter <edsonrichter@hotmail.com>
Re: Postgres as In-Memory Database? Stefan Keller <sfkeller@gmail.com>
Re: Postgres as In-Memory Database? Martijn van Oosterhout <kleptog@svana.org>
Re: Postgres as In-Memory Database? Stefan Keller <sfkeller@gmail.com>
Re: Postgres as In-Memory Database? Gavin Flower <GavinFlower@archidevsys.co.nz>
Re: Postgres as In-Memory Database? Edson Richter <edsonrichter@hotmail.com>
Re: Postgres as In-Memory Database? John R Pierce <pierce@hogranch.com>
Re: Postgres as In-Memory Database? Jeff Janes <jeff.janes@gmail.com>
Re: Postgres as In-Memory Database? Edson Richter <edsonrichter@hotmail.com>
Re: Postgres as In-Memory Database? Jeff Janes <jeff.janes@gmail.com>
Re: Postgres as In-Memory Database? Edson Richter <edsonrichter@hotmail.com>
Re: Postgres as In-Memory Database? Jeff Janes <jeff.janes@gmail.com>
Re: Postgres as In-Memory Database? Jeff Janes <jeff.janes@gmail.com>
On Sun, Nov 17, 2013 at 4:46 PM, Edson Richter <edsonrichter@hotmail.com> wrote:
Yes, those optimizations I was talking about: having database server store transaction log in high speed solid state disks and consider it done while background thread will update data in slower disks...
There is no reason to wait for fsync in slow disks to guarantee consistency... If database server crashes, then it just need to "redo" log transactions from fast disk into slower data storage and database server is ready to go (I think this is Sybase/MS SQL strategy for years).
Using a nonvolatile write cache for pg_xlog is certainly possible and often done with PostgreSQL. It is not important that the nonvolatile write cache is fronting for SSD, fronting for HDD is fine as the write cache turns the xlog into pure sequential writes and HDD should not have a problem keeping up.
Cheers,
Jeff
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