Date: Mon, 22 Jun 2015 18:37:01 -0400 From: Quartz <quartz@sneakertech.com> To: kpneal@pobox.com Cc: FreeBSD FS <freebsd-fs@freebsd.org> Subject: Re: ZFS raid write performance? Message-ID: <55888E0D.6040704@sneakertech.com> In-Reply-To: <20150622221422.GA71520@neutralgood.org> References: <5587C3FF.9070407@sneakertech.com> <5587C97F.2000407@delphij.net> <55887810.3080301@sneakertech.com> <20150622221422.GA71520@neutralgood.org>
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>>> a single hard drive won't do much beyond 100MB/s (maybe >>> 120MB/s max) for sequential 128kB blocks, so that "landing pad" would >>> probably not very helpful assuming you can saturate your GigE network >> >> Wait, I'm confused. A single GigE has a theoretical max of like >> 100mb/sec. That would imply the drive is probably about the same speed? > > You won't get the theoretical max what with the overhead of Ethernet > packets, TCP/IP overhead, and SMB protocol overhead. Right, I know that, that's why I don't understand what Xin Li was trying to say. I guess a better way to word the question is: would a raidzX using generic drives, samba, and 500mb-4gb files be notably slower at writing than ~70mb/sec. I have a feeling not, but I wanted to double check.
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