Date: Thu, 14 Jun 2018 19:54:45 +0200 From: Albert Shih <Albert.Shih@obspm.fr> To: freebsd-fs@freebsd.org Subject: ZFS send problem Message-ID: <20180614175445.GA1781@io.chezmoi.fr>
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Hi, I still got a very serious problem with zfs send (not recv). After I take a snapshot and try to send it, the server begin to send the snapshot (I can see on the target the incomming data) and after sometime (5=10m) on the server the zfs command freeze, I can launch zpool command either. I check arc size, and if I let the max amount of memory to the vfs.zfs.arc_max (~ Max RAM ~ 192Go) the zfs command freeze simultaneously with the arc reach 100.3% of the max (but I cannot make lots of test, so I'm not sure it's related). If I set le vfs.zfs.arc_max at half of the RAM ( = 96Go) I can see thought zfs-stats the arc come to 100.3% and empty to 98-99% and raise again. Either way the zfs command not really freeze totally but take lot of time to answer (~10-20 seconds when normally it's < 1sec). The only « special » configuration (vs my other server doing same thing without problem) is I got two zpool on this one. I've no idea if that can be a problem (one with 2 ssd, the other with 4 vdev of 7 disks) I check dmesg, /var/log/all.log and don't find any information or error message. Any idea ? Regards. -- Albert SHIH DIO bātiment 15 Observatoire de Paris xmpp: jas@obspm.fr Heure local/Local time: Thu Jun 14 19:46:04 CEST 2018
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