Date: Wed, 3 Dec 2003 18:03:50 +1000 From: "Kevin Fleming" <kevin@w617.com> To: <freebsd-questions@FreeBSD.ORG> Subject: dump performance - 4.6-RELEASE #0 Message-ID: <PHEGLCOOAHDIAOFLOHJGMECKFOAA.kevin@w617.com>
next in thread | raw e-mail | index | archive | help
I've done numerous tests with dump and different buffer sizes etc, but the maximum speed I can read from disk is approximately 14MB/s (measured by iostat). cpio / tar etc can read from disk at over 30MB/s .. Dump seems to spawn children (presumably for better IO) - is it possible to tweak the number of children for better IO performance. I can write to my tape unit at a sustained 25MB/s (AIT-3 on an LVD interface), so I'm wasting tape and time. Kevin
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?PHEGLCOOAHDIAOFLOHJGMECKFOAA.kevin>