From: James Vanns <james.vanns@framestore.com>
To: fio@vger.kernel.org
Subject: Prevention of full device?
Date: Tue, 2 Jul 2013 16:34:34 +0100 (BST) [thread overview]
Message-ID: <335085150.31083401.1372779274187.JavaMail.root@framestore.com> (raw)
In-Reply-To: <27943043.31081549.1372778944376.JavaMail.root@framestore.com>
Hi. In attempting to get a single job to create files before allowing further jobs to perform I/O on them, I cannot
see how to restrict the sum total of all the files on the device. I wish to create n files ranging in size from i-j
with a cap of m in total (so the sum of n does not exceed m). For example;
[file-generator]
numjobs=1
create_only=1
create_on_open=0
time_based=0
fill_fs=0
fill_device=0
filesize=4k-20m
size=512m
nrfiles=256
fallocate=posix
fadvise_hint=1
filename_format=\$filenum.dat
directory=/tmp/fio
I'd expect the above to create 256 files ranging from 4k to 20m and a 'du -sh' on /tmp/fio to result in
512m. However, it always seems to fill the device! How can I stop this?
Cheers,
Jim
--
Jim Vanns
Senior Software Developer
Framestore
next parent reply other threads:[~2013-07-02 15:40 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <27943043.31081549.1372778944376.JavaMail.root@framestore.com>
2013-07-02 15:34 ` James Vanns [this message]
2013-07-03 7:08 ` Prevention of full device? Jens Axboe
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