From: David Boreham <david_list@boreham.org>
To: PGSQL Performance <pgsql-performance@postgresql.org>
Subject: Re: Benchmarking a large server
Date: Mon, 09 May 2011 14:59:01 -0600
Message-ID: <4DC85595.5070909@boreham.org> (raw)
In-Reply-To: <BANLkTikSZ=7h7UBgsg3Zpri7m85gz9FC0g@mail.gmail.com>
References: <BANLkTikONPZ_7zQNfbyyN4MGBnn5PXHrAg@mail.gmail.com>
<BANLkTikSZ=7h7UBgsg3Zpri7m85gz9FC0g@mail.gmail.com>
> hm, if it was me, I'd write a small C program that just jumped
> directly on the device around and did random writes assuming it wasn't
> formatted. For sequential read, just flush caches and dd the device
> to /dev/null. Probably someone will suggest better tools though.
I have a program I wrote years ago for a purpose like this. One of the
things it can
do is write to the filesystem at the same time as dirtying pages in a
large shared
or non-shared memory region. The idea was to emulate the behavior of a
database
reasonably accurately. Something like bonnie++ would probably be a good
starting
point these days though.
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To: pgsql-performance@postgresql.org
Cc: david_list@boreham.org
Subject: Re: Benchmarking a large server
In-Reply-To: <4DC85595.5070909@boreham.org>
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