Date: Mon, 05 Jun 2017 23:33:00 +0200 From: "Ronald Klop" <ronald-lists@klop.ws> To: =?utf-8?Q?Karli_Sj=C3=B6berg?= <karli.sjoberg@slu.se>, "Gary Palmer" <gpalmer@freebsd.org>, "Shiva Bhanujan" <Shiva.Bhanujan@quorum.net> Cc: "freebsd-fs@freebsd.org" <freebsd-fs@freebsd.org>, "Jeremy Faulkner" <gldisater@gmail.com> Subject: Re: FreeBSD restartable send/receive over WAN Message-ID: <op.y1dp5ai1kndu52@53556c9c.cm-6-6b.dynamic.ziggo.nl> In-Reply-To: <3A5A10BE32AC9E45B4A22F89FC90EC0701C35D8A68@QLEXC01.Quorum.local> References: <0719669324a44fe0bfba3e8e08b0ae99@exch2-4.slu.se> <3A5A10BE32AC9E45B4A22F89FC90EC0701BDB12619@QLEXC01.Quorum.local> <op.ywdyg82mkndu52@53556c9c.cm-6-6b.dynamic.ziggo.nl> <3A5A10BE32AC9E45B4A22F89FC90EC0701BDB12ABA@QLEXC01.Quorum.local> <op.ywmjkqczkndu52@53556c9c.cm-6-6b.dynamic.ziggo.nl> <3A5A10BE32AC9E45B4A22F89FC90EC0701C35D8A68@QLEXC01.Quorum.local>
next in thread | previous in thread | raw e-mail | index | archive | help
Hi, I'm not authoritative about this, but I see the feature in FreeBSD 12: https://www.freebsd.org/cgi/man.cgi?query=3Dzfs&apropos=3D0&sektion=3D8&= manpath=3DFreeBSD+12-current&arch=3Ddefault&format=3Dhtml (option -c to 'zfs send') But not in FreeBSD 11. https://www.freebsd.org/cgi/man.cgi?query=3Dzfs&apropos=3D0&sektion=3D8&= manpath=3DFreeBSD+11-current&arch=3Ddefault&format=3Dhtml Regards, Ronald. On Mon, 05 Jun 2017 23:06:41 +0200, Shiva Bhanujan = <Shiva.Bhanujan@quorum.net> wrote: > Hi Ronald, > > Ideally, I'd like to send/receive the compressed blocks, and don't wis= h = > to compress/uncompress on the fly. Is compressed send/receive = > available on FreeBSD and if so, in what version? > > Regards, > Shiva > > > ________________________________________ > From: Ronald Klop [ronald-lists@klop.ws] > Sent: Sunday, March 05, 2017 3:01 AM > To: Karli Sj=C3=B6berg; Gary Palmer; Shiva Bhanujan > Cc: freebsd-fs@freebsd.org; Jeremy Faulkner > Subject: Re: FreeBSD restartable send/receive over WAN > > On Fri, 03 Mar 2017 01:34:57 +0100, Shiva Bhanujan > <Shiva.Bhanujan@quorum.net> wrote: > >> I ran the same set of tests between 2 FreeBSD instances, connected on= a >> 1G LAN. The the comms was setup using mbuffer. Here's the basic >> command. >> >> time zfs send -v <snapshot> | <compress> | mbuffer -O <IP>:8099 -b 10= 24 >> -m 128M -P 10 -q -l /tmp/mbuffer.log >> mbuffer -4 -I 8099 -b 1024 -m 128M -q -l /tmp/mbuffer.log | <uncompre= ss> >> | zfs recv <snapshot> >> >> Here are the results that I got. >> >> no compression: >> real 3m18.591s >> user 0m0.390s >> sys 0m8.177s >> >> xz -0: >> real 7m26.349s >> user 7m6.436s >> sys 0m8.471s >> >> pxz -0: >> real 2m28.470s >> user 6m44.168s >> sys 0m12.002s >> >> gzip: >> real 3m12.482s >> user 3m8.260s >> sys 0m4.974s >> >> lz4: >> real 1m58.363s >> user 0m10.000s >> sys 0m8.708s >> >> >> >> lz4 still comes out best. Is there anything else that I might be >> missing in my tests? don't have a real setup at this time to test WA= N >> connections, but I'd like to think that these results can be >> extrapolated to a WAN link also. > > > Uhm, in your previous test no-compression came out best. I thought you= > wanted to test if sending on-disk compressed blocks over a network was= a > gain. Not a plain test of compression algoritms. > > As your current numbers show: the overhead of mbuffer.log is much high= er > than the overhead of compression+decompression for the lz4 case. real:= > 0m29 to 1m58. (All other compressors are actually faster with mbuffer = in > between? Probably because of more efficient buffering by mbuffer.) > As the overhead of mbuffer is large it is a question how much gain you= = > get > from removing the extra compression step by sending the on-disk = > compressed > blocks. > I guess the time would go from 1m58 to about 1m30. > > NB: By splitting your zfs send/receive command in two, the numbers of = = > time > can be affected. Time prints the output as soon as zfs send ends. > > Have fun, > Ronald. > > > >> ________________________________________ >> From: Ronald Klop [ronald-lists@klop.ws] >> Sent: Tuesday, February 28, 2017 11:44 AM >> To: Karli Sj=C3=B6berg; Gary Palmer; Shiva Bhanujan >> Cc: freebsd-fs@freebsd.org; Jeremy Faulkner >> Subject: Re: FreeBSD restartable send/receive over WAN >> >> On Tue, 28 Feb 2017 16:04:16 +0100, Shiva Bhanujan >> <Shiva.Bhanujan@quorum.net> wrote: >> >>> thanks for all the pointers for the compression algorithms. I ran a= = >>> few >>> tests to compare compression overhead. These are local zfs >>> send/receive, and no network is involved. >>> >>> time zfs send -v <src-snapshot> | <compress> | <uncompress> | zfs >>> receive -s <dst-snapshot> >>> >>> Here are the performance results that I got. >>> >>> no compression: >>> real 0m20.892s >>> user 0m0.000s >>> sys 0m5.587s >>> >>> xz -0: >>> real 8m38.569s >>> user 10m28.551s >>> sys 0m6.866s >>> >>> pxz -0: >>> real 4m38.448s >>> user 10m55.863s >>> sys 0m13.324s >>> >>> gzip: >>> real 3m51.297s >>> user 4m12.035s >>> sys 0m4.696s >>> >>> lz4: >>> real 0m29.912s >>> user 0m16.543s >>> sys 0m10.810s >>> >>> >>> lz4 has the least overhead in terms of time. pxz/xz seem to be >>> prohibitive give the above results. Unless, there is something basi= c >>> I'm missing? >>> >>> I was really hoping that compressed sends would be available, as tha= t >>> would actively eliminate this overhead, given that we use lz4 as the= >>> compression algorithm when writing to disks. >> >> >> Why don't you test this with a network in between? That would give mu= ch >> more valuable numbers to compare for your use case. >> The number above say nothing about the gain vs the bottleneck you are= >> trying to remove. >> >> Ronald. >> >> >> >> >>> >>> >>> ________________________________ >>> From: Karli Sj=C3=B6berg [karli.sjoberg@slu.se] >>> Sent: Sunday, February 26, 2017 8:41 AM >>> To: Gary Palmer >>> Cc: Shiva Bhanujan; Jeremy Faulkner; freebsd-fs@freebsd.org >>> Subject: Re: FreeBSD restartable send/receive over WAN >>> >>> >>> Den 26 feb. 2017 4:16 em skrev Gary Palmer <gpalmer@freebsd.org>: >>>> >>>> On Sun, Feb 26, 2017 at 02:08:59PM +0000, Shiva Bhanujan wrote: >>>> > The compression that we use on our ZFS filesystems is lz4. So, i= f I >>>> have to pipe it through a compression algorithm, that'd be >>>> uncompressing and compressing it 4 times. >>>> > >>>> > disk (lz4) -> zfs send (uncompress) -> compress (gzip) -> (networ= k) >>>> -> uncompress (gzip) -> zfs recv (compress) -> disk (lz4) >>>> > >>>> > isn't this quite expensive? We have to transfer multi terabyte = >>>> files >>>> on a WAN link. I'm also of the understanding that gzip by itself i= s >>>> single-threaded, so that'd peg one of the CPUs to 100%. there migh= t = >>>> be >>>> other compression algorithms that can be used, but sending the ZFS = as >>>> it is compressed on the filesystem is something that would be optim= al, >>>> and would reduce the overhead of the additional [de]compressions th= at >>>> are taking place? >>>> >>>> Without going into the efficiency part of your message: >>>> >>>> archivers/pigz: Parallel GZIP >>>> archivers/pbzip2: Parallel BZIP2 >>>> archivers/pixz: Parallel, indexing version of XZ >>>> archivers/pxz: Parallel LZMA compressor using liblzma >>> >>> Also worth mentioning is, obviously: >>> archivers/lz4 >>> >>> :) >>> >>> /K >>> >>>> >>>> Regards, >>>> >>>> Gary >>>> >>>> > >>>> > ________________________________________ >>>> > From: owner-freebsd-fs@freebsd.org [owner-freebsd-fs@freebsd.org]= on >>>> behalf of Jeremy Faulkner [gldisater@gmail.com] >>>> > Sent: Saturday, February 25, 2017 4:03 PM >>>> > To: freebsd-fs@freebsd.org >>>> > Subject: Re: FreeBSD restartable send/receive over WAN >>>> > >>>> > Pipe it through a compressor >>>> > >>>> > On 2017-02-25 2:09 PM, Shiva Bhanujan wrote: >>>> > > Hi, >>>> > > >>>> > > I just tried restartable send/receive in 10.3 and it works like= a >>>> charm. I was wondering if compressed send has made its way into >>>> FreeBSD? I checked 10.3 and 11.0-RELEASE, and I don't see the >>>> -c/--compressed option. Any pointers? >>>> > > >>>> > > Regards, >>>> > > Shiva >>>> > > >>>> > > >>>> > > ________________________________________ >>>> > > From: owner-freebsd-fs@freebsd.org [owner-freebsd-fs@freebsd.or= g] >>>> on behalf of Adam Nowacki [nowakpl@platinum.linux.pl] >>>> > > Sent: Thursday, February 16, 2017 10:41 AM >>>> > > To: freebsd-fs@freebsd.org >>>> > > Subject: Re: FreeBSD restartable send/receive over WAN >>>> > > >>>> > > On 2017-02-16 19:22, Shiva Bhanujan wrote: >>>> > >> Hello, >>>> > >> >>>> > >> I was wondering if restartable send/receive is available in >>>> FreeBSD? We're running 10.2 and have a requirement of sending and >>>> receiving ZFS snapshots over a WAN link. The snapshots could be mo= re >>>> than a few terabytes. >>>> > >> >>>> > >> Can somebody please give me pointers, and if this feature is o= r >>>> isn't available in FreeBSD? >>>> > > >>>> > > FreeBSD 10.3 and later. >>>> > > >>>> > > _______________________________________________ >>>> > > freebsd-fs@freebsd.org mailing list >>>> > > https://lists.freebsd.org/mailman/listinfo/freebsd-fs >>>> > > To unsubscribe, send any mail to >>>> "freebsd-fs-unsubscribe@freebsd.org" >>>> > > _______________________________________________ >>>> > > freebsd-fs@freebsd.org mailing list >>>> > > https://lists.freebsd.org/mailman/listinfo/freebsd-fs >>>> > > To unsubscribe, send any mail to >>>> "freebsd-fs-unsubscribe@freebsd.org" >>>> > > >>>> > _______________________________________________ >>>> > freebsd-fs@freebsd.org mailing list >>>> > https://lists.freebsd.org/mailman/listinfo/freebsd-fs >>>> > To unsubscribe, send any mail to = >>>> "freebsd-fs-unsubscribe@freebsd.org" >>>> > _______________________________________________ >>>> > freebsd-fs@freebsd.org mailing list >>>> > https://lists.freebsd.org/mailman/listinfo/freebsd-fs >>>> > To unsubscribe, send any mail to = >>>> "freebsd-fs-unsubscribe@freebsd.org" >>>> > >>>> _______________________________________________ >>>> freebsd-fs@freebsd.org mailing list >>>> https://lists.freebsd.org/mailman/listinfo/freebsd-fs >>>> To unsubscribe, send any mail to "freebsd-fs-unsubscribe@freebsd.or= g" >>> _______________________________________________ >>> freebsd-fs@freebsd.org mailing list >>> https://lists.freebsd.org/mailman/listinfo/freebsd-fs >>> To unsubscribe, send any mail to "freebsd-fs-unsubscribe@freebsd.org= "
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?op.y1dp5ai1kndu52>