From: | Qingqing Zhou <zhouqq(dot)postgres(at)gmail(dot)com> |
---|---|
To: | |
Cc: | pgsql-hackers <pgsql-hackers(at)postgresql(dot)org> |
Subject: | Re: Relation extension scalability |
Date: | 2015-04-30 17:50:47 |
Message-ID: | CAJjS0u3oVpuSAT8NviryeRNqA0nj8WEEXfSx=uRPqWF1=ORSVg@mail.gmail.com |
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Lists: | pgsql-hackers |
On Fri, Apr 17, 2015 at 11:19 AM, Qingqing Zhou
<zhouqq(dot)postgres(at)gmail(dot)com> wrote:
>
> Most commercial database employs a DMS storage model, where it manages
> object mapping and freespace itself. So different objects are sharing
> storage within several files. Surely it has historic reasons, but it
> has several advantages over current model:
> - remove fd pressure
> - remove double buffering (by introducing ADIO)
> - controlled layout and access pattern (sequential and read-ahead)
> - better quota management
> - performance potentially better
>
> Considering platforms supported and the stableness period needed, we
> shall support both current storage model and DMS model. I will stop
> here to see if this deserves further discussion.
>
Sorry, it might considered double-posting here but I am wondering have
we ever discussed this before? If we already have some conclusions on
this, could anyone share me a link?
Thanks,
Qingqing
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