| From: | "Harald Armin Massa" <haraldarminmassa(at)gmail(dot)com> |
|---|---|
| To: | PFC <lists(at)peufeu(dot)com> |
| Cc: | "Rainer Bauer" <usenet(at)munnin(dot)com>, pgsql-performance(at)postgresql(dot)org |
| Subject: | Re: Data transfer very slow when connected via DSL |
| Date: | 2007-06-22 12:45:12 |
| Message-ID: | 7be3f35d0706220545uaaa957ey3b1ca083ba895c39@mail.gmail.com |
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| Thread: | |
| Lists: | pgsql-performance |
PFC,
> Correct. I use a pyro-remote server. On request this remote server copies
> > the relevant rows into a temporary table, uses a copy_to Call to push
> > them
> > into a StringIO-Objekt (that's Pythons version of "In Memory File"),
> > serializes that StringIO-Objekt, does a bz2-compression and transfers
> the
> > whole block via VPN.
>
> What about a SSH tunnel using data compression ?
Setup on multiple Windows Workstations in multiple Installations is not
possible.
> If you fetch all rows from a query in one go, would it be fast ?
I tried the same copy_to via VPN. It took 10-50x the time it took locally.
>Also, PG can now COPY from a query, so you don't really need the temp
table...
I know, but was stuck to 8.1 on some servers.
Best wishes,
Harald
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