| From: | james <james(at)mansionfamily(dot)plus(dot)com> |
|---|---|
| To: | Robert Haas <robertmhaas(at)gmail(dot)com> |
| Cc: | Константин Книжник <knizhnik(at)garret(dot)ru>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, David Fetter <david(at)fetter(dot)org>, PG Hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: [ANNOUNCE] IMCS: In Memory Columnar Store for PostgreSQL |
| Date: | 2014-01-06 20:59:13 |
| Message-ID: | 52CB1921.8000505@mansionfamily.plus.com |
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| Thread: | |
| Lists: | pgsql-announce pgsql-hackers |
On 06/01/2014 03:14, Robert Haas wrote:
> That's up to the application. After calling dsm_create(), you call
> dsm_segment_handle() to get the 32-bit integer handle for that
> segment. Then you have to get that to the other process(es) somehow.
> If you're trying to share a handle with a background worker, you can
> stuff it in bgw_main_arg. Otherwise, you'll probably need to store it
> in the main shared memory segment, or a file, or whatever.
Well, that works for sysv shm, sure. But I was interested (possibly
from Konstantin)
how the handle transfer takes place at the moment, particularly if it is
possible
to create additional segments dynamically. I haven't looked at the
extension at all.
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