Date: Thu, 26 Jan 2023 21:18:19 +1000 From: Korolev Sergey <serejk@febras.net> To: Ioan Samarul <samarul.meu@gmail.com> Cc: freebsd-questions@freebsd.org Subject: Re: rsync freezes FreeBSD machine Message-ID: <6F206B4F-4E61-4773-8122-C356E599F619@febras.net> In-Reply-To: <CADH9QNo%2BrvOR=pUyC=_tEdiYMwf2VuFTiZLzJugS6nDTYBSMGA@mail.gmail.com> References: <CADH9QNo%2BrvOR=pUyC=_tEdiYMwf2VuFTiZLzJugS6nDTYBSMGA@mail.gmail.com>
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--Apple-Mail=_FB5AB4E0-36E8-4E81-8F47-D7B5DEE7A584 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=utf-8 Hello, my experience (not big, to be honest) says, that the possible reason of = that type of freeze (when nothing helps except hard reboot) is when = processes hangs in =E2=80=98zio=E2=80=99 state. Some deadlock arises = when trying to access to a very busy FS. So, maybe monitoring with = zfs-mon can help, with simultaneous =E2=80=99top=E2=80=99 monitoring in = separate console. > On 26 Jan 2023, at 20:39, Ioan Samarul <samarul.meu@gmail.com> wrote: >=20 > Hello to you all! >=20 > I am doing a backup for some machines (OpenBSD and Linux) to a FreeBSD > machine (13.1-RELEASE-p5) with ZFS using rsync (usually with `-avhz`). > The problem I always encounter is that if I do an rsync to FreeBSD > everything is smooth, but the other way around, after some files > copied, the FreeBSD machine hangs. I tried even using > `--bwlimit=3D5000`, but it is the same. I can't ssh, nothing. Just = hard > restart. >=20 > I tried looking in the logs but I didn't get any useful information. >=20 > Any hint? >=20 --Apple-Mail=_FB5AB4E0-36E8-4E81-8F47-D7B5DEE7A584 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=utf-8 <html><head><meta http-equiv=3D"Content-Type" content=3D"text/html; = charset=3Dutf-8"></head><body style=3D"word-wrap: break-word; = -webkit-nbsp-mode: space; line-break: after-white-space;" = class=3D"">Hello,<div class=3D""><br class=3D""></div><div class=3D"">my = experience (not big, to be honest) says, that the possible reason of = that type of freeze (when nothing helps except hard reboot) is when = processes hangs in =E2=80=98zio=E2=80=99 state. Some deadlock arises = when trying to access to a very busy FS. So, maybe monitoring with = zfs-mon can help, with simultaneous =E2=80=99top=E2=80=99 monitoring in = separate console.<br class=3D""><div class=3D""><div><br = class=3D""><blockquote type=3D"cite" class=3D""><div class=3D"">On 26 = Jan 2023, at 20:39, Ioan Samarul <<a = href=3D"mailto:samarul.meu@gmail.com" = class=3D"">samarul.meu@gmail.com</a>> wrote:</div><br = class=3D"Apple-interchange-newline"><div class=3D""><div class=3D"">Hello = to you all!<br class=3D""><br class=3D"">I am doing a backup for some = machines (OpenBSD and Linux) to a FreeBSD<br class=3D"">machine = (13.1-RELEASE-p5) with ZFS using rsync (usually with `-avhz`).<br = class=3D"">The problem I always encounter is that if I do an rsync to = FreeBSD<br class=3D"">everything is smooth, but the other way around, = after some files<br class=3D"">copied, the FreeBSD machine hangs. I = tried even using<br class=3D"">`--bwlimit=3D5000`, but it is the same. I = can't ssh, nothing. Just hard<br class=3D"">restart.<br class=3D""><br = class=3D"">I tried looking in the logs but I didn't get any useful = information.<br class=3D""><br class=3D"">Any hint?<br class=3D""><br = class=3D""></div></div></blockquote></div><br = class=3D""></div></div></body></html>= --Apple-Mail=_FB5AB4E0-36E8-4E81-8F47-D7B5DEE7A584--
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