Date: Fri, 16 Feb 2024 13:04:48 -0500 From: Charles Sprickman <spork@bway.net> To: Dimitry Andric <dim@FreeBSD.org> Cc: joe mcguckin <joe@via.net>, freebsd-fs <freebsd-fs@freebsd.org> Subject: Re: ZFS performance Message-ID: <E97FFB94-197F-464D-9F4C-8E5FF2283A6F@bway.net> In-Reply-To: <45ED978F-8F7B-408E-90F8-C926CE49C6D5@FreeBSD.org> References: <163F3799-67B7-42C5-ABED-767DCC6DAC03@via.net> <45ED978F-8F7B-408E-90F8-C926CE49C6D5@FreeBSD.org>
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> On Feb 16, 2024, at 6:49=E2=80=AFAM, Dimitry Andric <dim@FreeBSD.org> = wrote: >=20 > On 16 Feb 2024, at 02:08, joe mcguckin <joe@via.net> wrote: >>=20 >> I have a ZFS fileserver running samba- I =E2=80=98m using it as a = file server and as a Timemachine backup server. TM work but mit is = really slow. >> Are there speed tweaks for ZFS I can apply. Does ZFS have perf = monitoring features I can use to characterize the speed? >=20 > Apple's Time Machine is just horrendously slow in general, the host's > file system does not seem to matter at all. If you just copy a regular > file to that SMB share, you should see that it performs well enough. Also not even sure I'd be poking at ZFS at all here - all the stuff I = saw about improving TM performance has always focused on bizarre little = tweaks to samba, not the underlying filesystem... Charles >=20 > I am still unsure what it is in Time machine that makes it so slow, = but > it sometimes seems to stall completely on very small files, and it can > take minutes (!) to copy just a few kilobytes. >=20 > It may help a little to do on the Mac: >=20 > sudo sysctl debug.lowpri_throttle_enabled=3D0 >=20 > but it won't get significantly faster. People should complain to = Apple, > but they will probably just say that FreeBSD with Samba is not an > officially supported use case. :) >=20 > -Dimitry >=20 >=20
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