Date: Fri, 18 Nov 2011 15:57:06 +0100 From: Fabian Keil <freebsd-listen@fabiankeil.de> To: freebsd-questions@freebsd.org Cc: Jerome Herman <jherman@dichotomia.fr> Subject: Re: Geom Gate usage and perf Message-ID: <20111118155706.72749e3b@fabiankeil.de> In-Reply-To: <4EC66850.2030008@dichotomia.fr> References: <4EC66850.2030008@dichotomia.fr>
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[-- Attachment #1 --] Jerome Herman <jherman@dichotomia.fr> wrote: > Just wondering if anyone is using geom gate and could help me with huge > perf issue I am having. > Right now the set up is such : 3 drives on the same machine A, exported > through geom gate and connected to machine B. > On machine B I format the drives as freebsd-vinum and mount them in > stripping+mirroring. > > The end goal is to have High Availability drives. > > The setup is working, but the perf are awfull. Thinking It was due to > software stripping and mirroring slowing the process down I tried with > only one drive with a standard UFS format. > > The perf are still horrible. When the drive is mounted locally on > machine A and I copy data with rsync from machine B; I have a steady > 12MB/s data transfer rate. > When the same drive is mounted with geom gate on machine B, the copy > rate is around 6KB/s to 25KB/s > > The drive was tested for I/O problems twice, and nothing was found. > > Any idea or suggestion as to where the problem might come from ? I haven't used ggate in years, but if I remember correctly I had performance issues as well until I significantly increased the send and receive buffers for ggatec and ggated. I think I never reached the performance I had hoped for, but at least it got good enough to be usable. Fabian [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.18 (FreeBSD) iEYEARECAAYFAk7GckoACgkQBYqIVf93VJ1rSQCdExTwoqW2Xx8EYzwmkFQhts41 orsAnRMUj6plvBu5ZXbvmaxnJ5kzhJM3 =BIHv -----END PGP SIGNATURE-----
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