Date: Sun, 2 May 2021 22:15:05 -0600 From: Alan Somers <asomers@freebsd.org> To: joe mcguckin <joe@via.net> Cc: freebsd-fs <freebsd-fs@freebsd.org> Subject: Re: Faster uploads to a ZFS network filler? Message-ID: <CAOtMX2jVZKPw4u8CRyfV00HghEb%2B3PanL=VWQm0UgubLs7vvzQ@mail.gmail.com> In-Reply-To: <52E8403F-2233-4C6A-8E6E-F99CBA04840E@via.net> References: <52E8403F-2233-4C6A-8E6E-F99CBA04840E@via.net>
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On Sun, May 2, 2021 at 8:20 PM joe mcguckin <joe@via.net> wrote: > I have a FreeBSD 12.2 system running with SAMBA. Up loading large files > (e.g. video files) I notice the first 700-800 Mb goes pretty quickly, but > around 800Mb, it pauses then proceeds at about half or 1/3 > normal speed. > > Is there a tunable parameter I can change to improve this behavoir? The > server has plenty of memory, can I tell ZFS, SAMBA or the kernel to use > more memory for caching? > > Thanks! > > Joe > By default ZFS is already very greedy with RAM. In fact, that's probably why you notice the speed cliff. That first 700-800 is probably going into RAM, and then it slows down when the server becomes limited by disk throughput. What does gstat show you. Are the disks saturated? -Alan
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