Aw: Re: strange behavior of --inplace on ZFS
Pavel Herrmann
morpheus.ibis at gmail.com
Wed Mar 12 08:14:28 MDT 2014
Hi
On Friday 07 March 2014 21:21:23 devzero at web.de wrote:
> Hi Pavel,
> could you try if --inplace --no-whole-file makes a difference?
sadly, this make no difference.
I am using rsync over network when testing, so that is the expected result.
However, when I enable compression for the volume, the size for mostly-zeroed
files goes down significantly.
thanks
Pavel Herrmann
> normally, if using rsync --inplace on local host without network in betweens
> makes rsync switch to --whole-file, and i assume, that for some reason
> your rsync is rewriting the whole file inplace. and any rewritten block on
> zfs means newly allocated block, which quickly eats up your space.
>
> -W, --whole-file
> With this option rsyncâs delta-transfer algorithm is not used
> and the whole file is sent as-is instead. The transfer may be
> faster if this option is used when the bandwidth between the source and
> destination machines is higher than the bandwidth to disk (especially when
> the "disk" is actually a networked filesys- tem). This is the default
> when both the source and destination are specified as local paths, but only
> if no batch-writing option is in effect.
>
> i came across this wile trying to recreate your issue - i tested this on
> localhost and while scratching my head abourt the weird growth i remembered
> that rsync is "too intelligent" when not run via network....
>
> regards
> Roland
>
> > Gesendet: Freitag, 07. März 2014 um 00:50 Uhr
> > Von: "Pavel Herrmann" <morpheus.ibis at gmail.com>
> > An: "Hendrik Visage" <hvjunk at gmail.com>
> > Cc: devzero at web.de, "rsync at lists.samba.org" <rsync at lists.samba.org>
> > Betreff: Re: strange behavior of --inplace on ZFS
> >
> > Hi
> >
> > apologies for reordering the message parts, and for the long bit at the
> > end
> >
> > On Thursday 06 March 2014 23:45:22 Hendrik Visage wrote:
> > > Question: The source and destination folder host OS and are both sides
> > > ZFS?
> >
> > no, the remote (source) was ext4. However, i plan to use it against at
> > least one NTFS machine as well
> >
> > > I'd like to see some stats that rsync said it transfered, also add the
> > > -S flag as an extra set of tests.
> >
> > --sparse had the opposite result, minimal size for zeroed file, no space
> > saved for random file.
> > combination of --sparse and --inplace is not supported
> >
> > > When you are on Solaris, also see the impact of a test case using
> > > mkfile and not dd if=/dev/zero.
> >
> > sadly, I have no Solaris in my environment, all test were done on Linux
> >
> > > On Thu, Mar 6, 2014 at 11:17 PM, <devzero at web.de> wrote:
> > > > Hi Pavel,
> > > >
> > > > maybe that´s related to zfs compression ?
> > > >
> > > > on compressed zfs filesystem, zeroes are not written to disk.
> >
> > compression was not turned on on the volume (unless this is enabled even
> > if
> > compression is set to off)
> >
> > > > # dd if=/dev/zero of=test.dat bs=1024k count=100
> > > >
> > > > /zfspool # ls -la
> > > > total 8
> > > > drwxr-xr-x 3 root root 4 Feb 26 10:18 .
> > > > drwxr-xr-x 27 root root 4096 Mar 29 2013 ..
> > > > drwxr-xr-x 25 root root 25 Mar 29 2013 backup
> > > > -rw-r--r-- 1 root root 104857600 Feb 26 10:18 test.dat
> > > >
> > > > /zfspool # du -k test.dat
> > > > 1 test.dat
> > > >
> > > > /zfspool # du -k --apparent-size test.dat
> > > > 102400 test.dat
> > > >
> > > > despite that, space calculation on compressed fs is a difficult
> > > > thing...
> >
> > space was as reported by 'zfs list', on a volume that was created
> > specifically for this test. I would assume that is the most reliable way
> > to get space usage>
> > > The other Question that would be interested (both with and without -S)
> > > is when you use the dd if=/dev/urandom created file, but change some
> > > places with dd =/dev/zero (ie the reverse of the A test case, creatin
> > > with dd if=/dev/zero and changes with dd if=/dev/urandom)
> >
> > I just rerun all the tests with --sparse and --inplace, results follow
> > (cleanup is done after each 'zfs list', not shown)
> >
> >
> > thanks
> > Pavel Herrmann
> >
> >
> >
> >
> >
> > zero-inited file
> >
> > remote runs:
> > # dd if=/dev/zero of=testfile bs=1024 count=102400
> > # dd if=/dev/urandom of=testfile count=1 bs=1024 seek=854 conv=notrunc
> > # dd if=/dev/urandom of=testfile count=1 bs=1024 seek=45368 conv=notrunc
> > # dd if=/dev/urandom of=testfile count=50 bs=1024 seek=9647 conv=notrunc
> >
> >
> > # rsync -aHAv --stats --delete --sparse root at remote:/test/ .
> > receiving incremental file list
> > ./
> > testfile
> >
> > Number of files: 2 (reg: 1, dir: 1)
> > Number of created files: 1 (reg: 1)
> > Number of regular files transferred: 1
> > Total file size: 104,857,600 bytes
> > Total transferred file size: 104,857,600 bytes
> > Literal data: 104,857,600 bytes
> > Matched data: 0 bytes
> > File list size: 50
> > File list generation time: 0.001 seconds
> > File list transfer time: 0.000 seconds
> > Total bytes sent: 33
> > Total bytes received: 104,870,500
> >
> > sent 33 bytes received 104,870,500 bytes 41,948,213.20 bytes/sec
> > total size is 104,857,600 speedup is 1.00
> > # zfs snapshot zraid/test at a
> > # rsync -aHAv --stats --delete --sparse root at remote:/test/ .
> > receiving incremental file list
> > testfile
> >
> > Number of files: 2 (reg: 1, dir: 1)
> > Number of created files: 0
> > Number of regular files transferred: 1
> > Total file size: 104,857,600 bytes
> > Total transferred file size: 104,857,600 bytes
> > Literal data: 10,240 bytes
> > Matched data: 104,847,360 bytes
> > File list size: 50
> > File list generation time: 0.001 seconds
> > File list transfer time: 0.000 seconds
> > Total bytes sent: 71,710
> > Total bytes received: 51,301
> >
> > sent 71,710 bytes received 51,301 bytes 82,007.33 bytes/sec
> > total size is 104,857,600 speedup is 852.42
> > # zfs snapshot zraid/test at b
> > # rsync -aHAv --stats --delete --sparse root at remote:/test/ .
> > receiving incremental file list
> > testfile
> >
> > Number of files: 2 (reg: 1, dir: 1)
> > Number of created files: 0
> > Number of regular files transferred: 1
> > Total file size: 104,857,600 bytes
> > Total transferred file size: 104,857,600 bytes
> > Literal data: 10,240 bytes
> > Matched data: 104,847,360 bytes
> > File list size: 50
> > File list generation time: 0.001 seconds
> > File list transfer time: 0.000 seconds
> > Total bytes sent: 71,710
> > Total bytes received: 51,301
> >
> > sent 71,710 bytes received 51,301 bytes 82,007.33 bytes/sec
> > total size is 104,857,600 speedup is 852.42
> > # zfs snapshot zraid/test at c
> > # rsync -aHAv --stats --delete --sparse root at remote:/test/ .
> > receiving incremental file list
> > testfile
> >
> > Number of files: 2 (reg: 1, dir: 1)
> > Number of created files: 0
> > Number of regular files transferred: 1
> > Total file size: 104,857,600 bytes
> > Total transferred file size: 104,857,600 bytes
> > Literal data: 61,440 bytes
> > Matched data: 104,796,160 bytes
> > File list size: 50
> > File list generation time: 0.001 seconds
> > File list transfer time: 0.000 seconds
> > Total bytes sent: 71,710
> > Total bytes received: 102,489
> >
> > sent 71,710 bytes received 102,489 bytes 116,132.67 bytes/sec
> > total size is 104,857,600 speedup is 601.94
> >
> > # zfs list
> > NAME USED AVAIL REFER MOUNTPOINT
> > <snip>
> > zraid/test 1.43M 3.44T 616K legacy
> >
> >
> >
> > # rsync -aHAv --stats --delete --inplace root at remote:/test/ .
> > receiving incremental file list
> > testfile
> >
> > Number of files: 2 (reg: 1, dir: 1)
> > Number of created files: 0
> > Number of regular files transferred: 1
> > Total file size: 104,857,600 bytes
> > Total transferred file size: 104,857,600 bytes
> > Literal data: 104,857,600 bytes
> > Matched data: 0 bytes
> > File list size: 50
> > File list generation time: 0.001 seconds
> > File list transfer time: 0.000 seconds
> > Total bytes sent: 71,710
> > Total bytes received: 104,870,497
> >
> > sent 71,710 bytes received 104,870,497 bytes 29,983,487.71 bytes/sec
> > total size is 104,857,600 speedup is 1.00
> > # zfs snapshot zraid/test at a
> > # rsync -aHAv --stats --delete --inplace root at remote:/test/ .
> > receiving incremental file list
> > testfile
> >
> > Number of files: 2 (reg: 1, dir: 1)
> > Number of created files: 0
> > Number of regular files transferred: 1
> > Total file size: 104,857,600 bytes
> > Total transferred file size: 104,857,600 bytes
> > Literal data: 10,240 bytes
> > Matched data: 104,847,360 bytes
> > File list size: 50
> > File list generation time: 0.001 seconds
> > File list transfer time: 0.000 seconds
> > Total bytes sent: 71,710
> > Total bytes received: 51,301
> >
> > sent 71,710 bytes received 51,301 bytes 82,007.33 bytes/sec
> > total size is 104,857,600 speedup is 852.42
> > # zfs snapshot zraid/test at b
> > # rsync -aHAv --stats --delete --inplace root at remote:/test/ .
> > receiving incremental file list
> > testfile
> >
> > Number of files: 2 (reg: 1, dir: 1)
> > Number of created files: 0
> > Number of regular files transferred: 1
> > Total file size: 104,857,600 bytes
> > Total transferred file size: 104,857,600 bytes
> > Literal data: 10,240 bytes
> > Matched data: 104,847,360 bytes
> > File list size: 50
> > File list generation time: 0.001 seconds
> > File list transfer time: 0.000 seconds
> > Total bytes sent: 71,710
> > Total bytes received: 51,301
> >
> > sent 71,710 bytes received 51,301 bytes 82,007.33 bytes/sec
> > total size is 104,857,600 speedup is 852.42
> > # zfs snapshot zraid/test at c
> > # rsync -aHAv --stats --delete --inplace root at remote:/test/ .
> > receiving incremental file list
> > testfile
> >
> > Number of files: 2 (reg: 1, dir: 1)
> > Number of created files: 0
> > Number of regular files transferred: 1
> > Total file size: 104,857,600 bytes
> > Total transferred file size: 104,857,600 bytes
> > Literal data: 61,440 bytes
> > Matched data: 104,796,160 bytes
> > File list size: 50
> > File list generation time: 0.001 seconds
> > File list transfer time: 0.000 seconds
> > Total bytes sent: 71,710
> > Total bytes received: 102,489
> >
> > sent 71,710 bytes received 102,489 bytes 69,679.60 bytes/sec
> > total size is 104,857,600 speedup is 601.94
> > # zfs list
> > NAME USED AVAIL REFER MOUNTPOINT
> > <snip>
> > zraid/test 346M 3.44T 100M legacy
> >
> >
> > random-init
> >
> > remote runs:
> > # dd if=/dev/urandom of=testfile count=102400 bs=1024
> > # dd if=/dev/urandom of=testfile count=1 bs=1024 seek=854 conv=notrunc
> > # dd if=/dev/urandom of=testfile count=1 bs=1024 seek=45368 conv=notrunc
> > # dd if=/dev/urandom of=testfile count=50 bs=1024 seek=9647 conv=notrunc
> >
> >
> > # rsync -aHAv --stats --delete --sparse root at remote:/test/ .
> > receiving incremental file list
> > ./
> > testfile
> >
> > Number of files: 2 (reg: 1, dir: 1)
> > Number of created files: 1 (reg: 1)
> > Number of regular files transferred: 1
> > Total file size: 104,857,600 bytes
> > Total transferred file size: 104,857,600 bytes
> > Literal data: 104,857,600 bytes
> > Matched data: 0 bytes
> > File list size: 50
> > File list generation time: 0.001 seconds
> > File list transfer time: 0.000 seconds
> > Total bytes sent: 33
> > Total bytes received: 104,870,500
> >
> > sent 33 bytes received 104,870,500 bytes 41,948,213.20 bytes/sec
> > total size is 104,857,600 speedup is 1.00
> > # zfs snapshot zraid/test at a
> > # rsync -aHAv --stats --delete --sparse root at remote:/test/ .
> > receiving incremental file list
> > testfile
> >
> > Number of files: 2 (reg: 1, dir: 1)
> > Number of created files: 0
> > Number of regular files transferred: 1
> > Total file size: 104,857,600 bytes
> > Total transferred file size: 104,857,600 bytes
> > Literal data: 10,240 bytes
> > Matched data: 104,847,360 bytes
> > File list size: 50
> > File list generation time: 0.001 seconds
> > File list transfer time: 0.000 seconds
> > Total bytes sent: 71,710
> > Total bytes received: 51,297
> >
> > sent 71,710 bytes received 51,297 bytes 82,004.67 bytes/sec
> > total size is 104,857,600 speedup is 852.45
> > # zfs snapshot zraid/test at b
> > # rsync -aHAv --stats --delete --sparse root at remote:/test/ .
> > receiving incremental file list
> > testfile
> >
> > Number of files: 2 (reg: 1, dir: 1)
> > Number of created files: 0
> > Number of regular files transferred: 1
> > Total file size: 104,857,600 bytes
> > Total transferred file size: 104,857,600 bytes
> > Literal data: 10,240 bytes
> > Matched data: 104,847,360 bytes
> > File list size: 50
> > File list generation time: 0.001 seconds
> > File list transfer time: 0.000 seconds
> > Total bytes sent: 71,710
> > Total bytes received: 51,297
> >
> > sent 71,710 bytes received 51,297 bytes 82,004.67 bytes/sec
> > total size is 104,857,600 speedup is 852.45
> > # zfs snapshot zraid/test at c
> > # rsync -aHAv --stats --delete --sparse root at remote:/test/ .
> > receiving incremental file list
> > testfile
> >
> > Number of files: 2 (reg: 1, dir: 1)
> > Number of created files: 0
> > Number of regular files transferred: 1
> > Total file size: 104,857,600 bytes
> > Total transferred file size: 104,857,600 bytes
> > Literal data: 61,440 bytes
> > Matched data: 104,796,160 bytes
> > File list size: 50
> > File list generation time: 0.001 seconds
> > File list transfer time: 0.000 seconds
> > Total bytes sent: 71,710
> > Total bytes received: 102,481
> >
> > sent 71,710 bytes received 102,481 bytes 69,676.40 bytes/sec
> > total size is 104,857,600 speedup is 601.97
> >
> > # zfs list
> > NAME USED AVAIL REFER MOUNTPOINT
> > <snip>
> > zraid/test 401M 3.44T 100M legacy
> >
> >
> > # rsync -aHAv --stats --delete --inplace root at remote:/test/ .
> > receiving incremental file list
> > ./
> > testfile
> >
> > Number of files: 2 (reg: 1, dir: 1)
> > Number of created files: 1 (reg: 1)
> > Number of regular files transferred: 1
> > Total file size: 104,857,600 bytes
> > Total transferred file size: 104,857,600 bytes
> > Literal data: 104,857,600 bytes
> > Matched data: 0 bytes
> > File list size: 50
> > File list generation time: 0.001 seconds
> > File list transfer time: 0.000 seconds
> > Total bytes sent: 33
> > Total bytes received: 104,870,500
> >
> > sent 33 bytes received 104,870,500 bytes 69,913,688.67 bytes/sec
> > total size is 104,857,600 speedup is 1.00
> > # zfs snapshot zraid/test at a
> > # rsync -aHAv --stats --delete --inplace root at test:/test/ .
> > receiving incremental file list
> > testfile
> >
> > Number of files: 2 (reg: 1, dir: 1)
> > Number of created files: 0
> > Number of regular files transferred: 1
> > Total file size: 104,857,600 bytes
> > Total transferred file size: 104,857,600 bytes
> > Literal data: 10,240 bytes
> > Matched data: 104,847,360 bytes
> > File list size: 50
> > File list generation time: 0.001 seconds
> > File list transfer time: 0.000 seconds
> > Total bytes sent: 71,710
> > Total bytes received: 51,297
> >
> > sent 71,710 bytes received 51,297 bytes 82,004.67 bytes/sec
> > total size is 104,857,600 speedup is 852.45
> > # zfs snapshot zraid/test at b
> > # rsync -aHAv --stats --delete --inplace root at remote:/test/ .
> > receiving incremental file list
> > testfile
> >
> > Number of files: 2 (reg: 1, dir: 1)
> > Number of created files: 0
> > Number of regular files transferred: 1
> > Total file size: 104,857,600 bytes
> > Total transferred file size: 104,857,600 bytes
> > Literal data: 10,240 bytes
> > Matched data: 104,847,360 bytes
> > File list size: 50
> > File list generation time: 0.001 seconds
> > File list transfer time: 0.000 seconds
> > Total bytes sent: 71,710
> > Total bytes received: 51,297
> >
> > sent 71,710 bytes received 51,297 bytes 82,004.67 bytes/sec
> > total size is 104,857,600 speedup is 852.45
> > # zfs snapshot zraid/test at c
> > # rsync -aHAv --stats --delete --inplace root at remote:/test/ .
> > receiving incremental file list
> > testfile
> >
> > Number of files: 2 (reg: 1, dir: 1)
> > Number of created files: 0
> > Number of regular files transferred: 1
> > Total file size: 104,857,600 bytes
> > Total transferred file size: 104,857,600 bytes
> > Literal data: 61,440 bytes
> > Matched data: 104,796,160 bytes
> > File list size: 50
> > File list generation time: 0.001 seconds
> > File list transfer time: 0.000 seconds
> > Total bytes sent: 71,710
> > Total bytes received: 102,481
> >
> > sent 71,710 bytes received 102,481 bytes 116,127.33 bytes/sec
> > total size is 104,857,600 speedup is 601.97
> > # zfs list
> > NAME USED AVAIL REFER MOUNTPOINT
> > <snip>
> > zraid/test 101M 3.44T 100M legacy
> >
> >
> >
> > random init, zeroed holes
> >
> > remote runs:
> > # dd if=/dev/urandom of=testfile count=102400 bs=1024
> > # dd if=/dev/zero of=testfile count=20000 bs=1024 seek=10 conv=notrunc
> > # dd if=/dev/zero of=testfile count=20000 bs=1024 seek=20010 conv=notrunc
> > # dd if=/dev/zero of=testfile count=20000 bs=1024 seek=40010 conv=notrunc
> > # dd if=/dev/zero of=testfile count=20000 bs=1024 seek=60010 conv=notrunc
> > # dd if=/dev/zero of=testfile count=20000 bs=1024 seek=80010 conv=notrunc
> >
> >
> > # rsync -aHAv --stats --delete --sparse root at remote:/test/ .
> > receiving incremental file list
> > ./
> > testfile
> >
> > Number of files: 2 (reg: 1, dir: 1)
> > Number of created files: 1 (reg: 1)
> > Number of regular files transferred: 1
> > Total file size: 104,857,600 bytes
> > Total transferred file size: 104,857,600 bytes
> > Literal data: 104,857,600 bytes
> > Matched data: 0 bytes
> > File list size: 50
> > File list generation time: 0.001 seconds
> > File list transfer time: 0.000 seconds
> > Total bytes sent: 33
> > Total bytes received: 104,870,500
> >
> > sent 33 bytes received 104,870,500 bytes 29,963,009.43 bytes/sec
> > total size is 104,857,600 speedup is 1.00
> > # zfs snapshot zraid/test at a
> > # rsync -aHAv --stats --delete --sparse root at remote:/test/ .
> > receiving incremental file list
> > testfile
> >
> > Number of files: 2 (reg: 1, dir: 1)
> > Number of created files: 0
> > Number of regular files transferred: 1
> > Total file size: 104,857,600 bytes
> > Total transferred file size: 104,857,600 bytes
> > Literal data: 20,480,000 bytes
> > Matched data: 84,377,600 bytes
> > File list size: 50
> > File list generation time: 0.001 seconds
> > File list transfer time: 0.000 seconds
> > Total bytes sent: 71,710
> > Total bytes received: 20,515,557
> >
> > sent 71,710 bytes received 20,515,557 bytes 8,234,906.80 bytes/sec
> > total size is 104,857,600 speedup is 5.09
> > # zfs snapshot zraid/test at b
> > # rsync -aHAv --stats --delete --sparse root at remote:/test/ .
> > receiving incremental file list
> > testfile
> >
> > Number of files: 2 (reg: 1, dir: 1)
> > Number of created files: 0
> > Number of regular files transferred: 1
> > Total file size: 104,857,600 bytes
> > Total transferred file size: 104,857,600 bytes
> > Literal data: 0 bytes
> > Matched data: 104,857,600 bytes
> > File list size: 50
> > File list generation time: 0.001 seconds
> > File list transfer time: 0.000 seconds
> > Total bytes sent: 71,710
> > Total bytes received: 41,057
> >
> > sent 71,710 bytes received 41,057 bytes 25,059.33 bytes/sec
> > total size is 104,857,600 speedup is 929.86
> > # zfs snapshot zraid/test at c
> > # rsync -aHAv --stats --delete --sparse root at remote:/test/ .
> > receiving incremental file list
> > testfile
> >
> > Number of files: 2 (reg: 1, dir: 1)
> > Number of created files: 0
> > Number of regular files transferred: 1
> > Total file size: 104,857,600 bytes
> > Total transferred file size: 104,857,600 bytes
> > Literal data: 0 bytes
> > Matched data: 104,857,600 bytes
> > File list size: 50
> > File list generation time: 0.001 seconds
> > File list transfer time: 0.000 seconds
> > Total bytes sent: 71,710
> > Total bytes received: 41,057
> >
> > sent 71,710 bytes received 41,057 bytes 45,106.80 bytes/sec
> > total size is 104,857,600 speedup is 929.86
> > # zfs snapshot zraid/test at d
> > # rsync -aHAv --stats --delete --sparse root at remote:/test/ .
> > receiving incremental file list
> > testfile
> >
> > Number of files: 2 (reg: 1, dir: 1)
> > Number of created files: 0
> > Number of regular files transferred: 1
> > Total file size: 104,857,600 bytes
> > Total transferred file size: 104,857,600 bytes
> > Literal data: 0 bytes
> > Matched data: 104,857,600 bytes
> > File list size: 50
> > File list generation time: 0.001 seconds
> > File list transfer time: 0.000 seconds
> > Total bytes sent: 71,710
> > Total bytes received: 41,057
> >
> > sent 71,710 bytes received 41,057 bytes 75,178.00 bytes/sec
> > total size is 104,857,600 speedup is 929.86
> > # zfs snapshot zraid/test at e
> > # rsync -aHAv --stats --delete --sparse root at remote:/test/ .
> > receiving incremental file list
> > testfile
> >
> > Number of files: 2 (reg: 1, dir: 1)
> > Number of created files: 0
> > Number of regular files transferred: 1
> > Total file size: 104,857,600 bytes
> > Total transferred file size: 104,857,600 bytes
> > Literal data: 0 bytes
> > Matched data: 104,857,600 bytes
> > File list size: 50
> > File list generation time: 0.001 seconds
> > File list transfer time: 0.000 seconds
> > Total bytes sent: 71,710
> > Total bytes received: 41,057
> >
> > sent 71,710 bytes received 41,057 bytes 75,178.00 bytes/sec
> > total size is 104,857,600 speedup is 929.86
> > # zfs list
> > NAME USED AVAIL REFER MOUNTPOINT
> > <snip>
> > zraid/test 309M 3.44T 2.72M legacy
> >
> >
> > # rsync -aHAv --stats --delete --inplace root at remote:/test/ .
> > receiving incremental file list
> > ./
> > testfile
> >
> > Number of files: 2 (reg: 1, dir: 1)
> > Number of created files: 1 (reg: 1)
> > Number of regular files transferred: 1
> > Total file size: 104,857,600 bytes
> > Total transferred file size: 104,857,600 bytes
> > Literal data: 104,857,600 bytes
> > Matched data: 0 bytes
> > File list size: 50
> > File list generation time: 0.001 seconds
> > File list transfer time: 0.000 seconds
> > Total bytes sent: 33
> > Total bytes received: 104,870,500
> >
> > sent 33 bytes received 104,870,500 bytes 29,963,009.43 bytes/sec
> > total size is 104,857,600 speedup is 1.00
> > # zfs snapshot zraid/test at a
> > # rsync -aHAv --stats --delete --inplace root at remote:/test/ .
> > receiving incremental file list
> > testfile
> >
> > Number of files: 2 (reg: 1, dir: 1)
> > Number of created files: 0
> > Number of regular files transferred: 1
> > Total file size: 104,857,600 bytes
> > Total transferred file size: 104,857,600 bytes
> > Literal data: 20,480,000 bytes
> > Matched data: 84,377,600 bytes
> > File list size: 50
> > File list generation time: 0.001 seconds
> > File list transfer time: 0.000 seconds
> > Total bytes sent: 71,710
> > Total bytes received: 20,515,557
> >
> > sent 71,710 bytes received 20,515,557 bytes 13,724,844.67 bytes/sec
> > total size is 104,857,600 speedup is 5.09
> > # zfs snapshot zraid/test at b
> > # rsync -aHAv --stats --delete --inplace root at remote:/test/ .
> > receiving incremental file list
> > testfile
> >
> > Number of files: 2 (reg: 1, dir: 1)
> > Number of created files: 0
> > Number of regular files transferred: 1
> > Total file size: 104,857,600 bytes
> > Total transferred file size: 104,857,600 bytes
> > Literal data: 0 bytes
> > Matched data: 104,857,600 bytes
> > File list size: 50
> > File list generation time: 0.001 seconds
> > File list transfer time: 0.000 seconds
> > Total bytes sent: 71,710
> > Total bytes received: 41,057
> >
> > sent 71,710 bytes received 41,057 bytes 45,106.80 bytes/sec
> > total size is 104,857,600 speedup is 929.86
> > # zfs snapshot zraid/test at c
> > # rsync -aHAv --stats --delete --inplace root at remote:/test/ .
> > receiving incremental file list
> > testfile
> >
> > Number of files: 2 (reg: 1, dir: 1)
> > Number of created files: 0
> > Number of regular files transferred: 1
> > Total file size: 104,857,600 bytes
> > Total transferred file size: 104,857,600 bytes
> > Literal data: 0 bytes
> > Matched data: 104,857,600 bytes
> > File list size: 50
> > File list generation time: 0.001 seconds
> > File list transfer time: 0.000 seconds
> > Total bytes sent: 71,710
> > Total bytes received: 41,057
> >
> > sent 71,710 bytes received 41,057 bytes 45,106.80 bytes/sec
> > total size is 104,857,600 speedup is 929.86
> > # zfs snapshot zraid/test at d
> > # rsync -aHAv --stats --delete --inplace root at remote:/test/ .
> > receiving incremental file list
> > testfile
> >
> > Number of files: 2 (reg: 1, dir: 1)
> > Number of created files: 0
> > Number of regular files transferred: 1
> > Total file size: 104,857,600 bytes
> > Total transferred file size: 104,857,600 bytes
> > Literal data: 0 bytes
> > Matched data: 104,857,600 bytes
> > File list size: 50
> > File list generation time: 0.001 seconds
> > File list transfer time: 0.000 seconds
> > Total bytes sent: 71,710
> > Total bytes received: 41,057
> >
> > sent 71,710 bytes received 41,057 bytes 45,106.80 bytes/sec
> > total size is 104,857,600 speedup is 929.86
> > # zfs snapshot zraid/test at e
> > # rsync -aHAv --stats --delete --inplace root at remote:/test/ .
> > receiving incremental file list
> > testfile
> > z
> > Number of files: 2 (reg: 1, dir: 1)
> > Number of created files: 0
> > Number of regular files transferred: 1
> > Total file size: 104,857,600 bytes
> > Total transferred file size: 104,857,600 bytes
> > Literal data: 0 bytes
> > Matched data: 104,857,600 bytes
> > File list size: 50
> > File list generation time: 0.001 seconds
> > File list transfer time: 0.000 seconds
> > Total bytes sent: 71,710
> > Total bytes received: 41,057
> >
> > sent 71,710 bytes received 41,057 bytes 45,106.80 bytes/sec
> > total size is 104,857,600 speedup is 929.86
> > zalohovadlo recover # zfs list
> > NAME USED AVAIL REFER MOUNTPOINT
> > <snip>
> > zraid/test 198M 3.44T 100M legacy
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