| From: | Robert Haas <robertmhaas(at)gmail(dot)com> |
|---|---|
| To: | Simon Riggs <simon(at)2ndquadrant(dot)com> |
| Cc: | Aidan Van Dyk <aidan(at)highrise(dot)ca>, Heikki Linnakangas <heikki(dot)linnakangas(at)enterprisedb(dot)com>, Fujii Masao <masao(dot)fujii(at)gmail(dot)com>, David Fetter <david(at)fetter(dot)org>, Heikki Linnakangas <heikki(at)postgresql(dot)org>, pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: Configuring synchronous replication |
| Date: | 2010-09-17 15:23:53 |
| Message-ID: | AANLkTinSg69afqgH_T+ZEgW1bnnSPMsdCq8DPxSHCuYg@mail.gmail.com |
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| Lists: | pgsql-committers pgsql-hackers |
On Fri, Sep 17, 2010 at 11:22 AM, Simon Riggs <simon(at)2ndquadrant(dot)com> wrote:
> On Fri, 2010-09-17 at 09:36 -0400, Aidan Van Dyk wrote:
>
>> I want to have them configured in a fsync WAL/style sync rep, I want to
>> make sure that if the master comes up first after I get power back, it's
>> not going to be claiming transactions are committed while the slave
>> (which happens to have 4x the disks because it keeps PITR backups for a
>> period too) it still chugging away on SCSI probes yet, not gotten to
>> having PostgreSQL up yet...
>
> Nobody has mentioned the ability to persist the not-committed state
> across a crash before, and I think it's an important discussion point.
Eh? I think all Aidan is asking for is the ability to have a mode
where sync rep is really always sync, or nothing commits. Rather than
timing out and continuing merrily on its way...
--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise Postgres Company
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