| From: | Thomas Munro <thomas(dot)munro(at)enterprisedb(dot)com> |
|---|---|
| To: | Peter Geoghegan <pg(at)bowt(dot)ie> |
| Cc: | Rushabh Lathia <rushabh(dot)lathia(at)gmail(dot)com>, Robert Haas <robertmhaas(at)gmail(dot)com>, Heikki Linnakangas <hlinnaka(at)iki(dot)fi>, Pg Hackers <pgsql-hackers(at)postgresql(dot)org>, Corey Huinker <corey(dot)huinker(at)gmail(dot)com> |
| Subject: | Re: Parallel tuplesort (for parallel B-Tree index creation) |
| Date: | 2017-11-03 01:39:49 |
| Message-ID: | CAEepm=3zu7=+J6rih0-xbHT2t2CuZFBw=jHT8o4N-kuo46L5Wg@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Fri, Nov 3, 2017 at 2:24 PM, Peter Geoghegan <pg(at)bowt(dot)ie> wrote:
> Thomas Munro <thomas(dot)munro(at)enterprisedb(dot)com> wrote:
>> That way you don't have to opt in to BufFile's
>> double buffering and segmentation schemes just to get shared file
>> clean-up, if for some reason you want direct file handles.
>
> Is that something that you really think is possible?
It's pretty far fetched, but maybe shared temporary relation files
accessed via smgr.c/md.c? Or maybe future things that don't want to
read/write through a buffer but instead want to mmap it.
--
Thomas Munro
http://www.enterprisedb.com
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