Re: Data transfer very slow when connected via DSL

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
Views: Raw Message | Whole Thread | Download mbox | Resend email
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

--
GHUM Harald Massa
persuadere et programmare
Harald Armin Massa
Spielberger Straße 49
70435 Stuttgart
0173/9409607
fx 01212-5-13695179
-
EuroPython 2007 will take place in Vilnius, Lithuania from Monday 9th July
to Wednesday 11th July. See you there!

In response to

Browse pgsql-performance by date

  From Date Subject
Next Message Sabin Coanda 2007-06-22 13:24:47 Re: PostgreSQL Configuration Tool for Dummies - feedback adjustable control
Previous Message Dimitri 2007-06-22 12:24:07 Re: Data transfer very slow when connected via DSL