Re: Standalone synchronous master - Mailing list pgsql-hackers

From MauMau
Subject Re: Standalone synchronous master
Date
Msg-id CBA80AC741504640A9466018BB8EBC60@maumau
Whole thread Raw
In response to Re: Standalone synchronous master  (Hannu Krosing <hannu@2ndQuadrant.com>)
Responses Re: Standalone synchronous master  (Hannu Krosing <hannu@2ndQuadrant.com>)
List pgsql-hackers
From: "Hannu Krosing" <hannu@2ndQuadrant.com>
> On 01/09/2014 01:57 PM, MauMau wrote:
>> Let me ask a (probably) stupid question.  How is the sync rep
>> different from RAID-1?
>>
>> When I first saw sync rep, I expected that it would provide the same
>> guarantees as RAID-1 in terms of durability (data is always mirrored
>> on two servers) and availability (if one server goes down, another
>> server continues full service).
> What you describe is most like A-sync rep.
> 
> Sync rep makes sure that data is always replicated before confirming to
> writer.

Really?  RAID-1 is a-sync?

Regards
MauMau





pgsql-hackers by date:

Previous
From: Tomonari Katsumata
Date:
Subject: Re: [BUG] Archive recovery failure on 9.3+.
Next
From: Tom Lane
Date:
Subject: Re: WIP patch (v2) for updatable security barrier views