Date: Tue, 4 Oct 2016 12:42:32 +0200 From: Fabian Keil <freebsd-listen@fabiankeil.de> To: freebsd-current@freebsd.org Subject: Re: ZFS - Abyssal slow on copying Message-ID: <20161004124232.6d655b61@fabiankeil.de> In-Reply-To: <20161002212504.2d782002.ohartman@zedat.fu-berlin.de> References: <20161002212504.2d782002.ohartman@zedat.fu-berlin.de>
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[-- Attachment #1 --] "O. Hartmann" <ohartman@zedat.fu-berlin.de> wrote: > Running 12-CURRENT (FreeBSD 12.0-CURRENT #32 r306579: Sun Oct 2 09:34:50 CEST 2016 ), I > have a NanoBSD setup which creates an image for a router device. > > The problem I face is related to ZFS. The system has a system's SSD (Samsung 850 Pro, > 256GB) which has an UFS filesystem. Aditionally, I have also a backup and a data HDD, > both WD, one 3 TB WD RED Pro, on 4 TB WD RED (the backup device). Both the sources for > the NanoBSD and the object tree as well as the NANO_WORLDDIR are residing on the 3 TB > data drive. > > The box itself has 8 GB RAM. When it comes to create the memory disk, which is ~ 1,3 GB > in size, the NanoBSD script starts creating the memory disk and then installing world > into this memory disk. And this part is a kind of abyssal in terms of the speed. Can you reproduce the issue if you replace the memory disk with a zvol or tmpfs? While I agree that depulication could be the cause of the problem, it probably wouldn't hurt to rule out a memory-disk related issue before recreating the pool. Fabian [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iEYEARECAAYFAlfzh5kACgkQBYqIVf93VJ36UQCeLN8gS1+IYN7XyocdiUCxrOtJ GVQAmweiXND8rPccqdMgZFiEf++Dev1H =lnl0 -----END PGP SIGNATURE-----
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