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Cannot zfs send directories from solaris 11.4 to 11.3

User277246Sep 17 2018 — edited Sep 19 2018

I upgrade one of my systems to  11.4

I can no longer send ZFS file systems to machines still running 11.3

server114# zfs send SomePool1/SomeThing@123 | ssh root@server113 zfs receive SomePool1

cannot receive: stream has unsupported feature, feature flags = 0xa4

warning: cannot send 'SomePool1/SomeThing@123': Broken pipe

The zfs and zpool versions are not higher on the 11.4 machine than the 11.3 machine.

Any thoughts?

thanks
This post has been answered by Darren Moffat-Oracle on Sep 18 2018
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Darren Moffat-Oracle
Answer

Solaris 11.4 has resumable send stream enabled by default.  If you pass '-s nocheck' to the 11.4 'zfs send' then it will remove the feature flag and metadata for resumable send and 11.3 should be able to see it.

From the zfs(8) man page on 11.4:

       -s check

           Specifies that the output stream will use a send stream  format
           that  uses per-record checksums. This format is the system-wide
           default. When an interrupted transfer is  resumed  by  using  a
           receive  checkpoint  (see zfs send --C), the use of the 'check'
           format before the outage enables the resumed transfer  to  pre-
           serve  and  reuse the portions of the interrupted snapshot that
           were already successfully received.

       -s nocheck

           Specifies that the output stream will use a legacy send  stream
           format  without  per-record  checksums. This format is suitable
           for transmission to older systems that do not support  the  new
           format.

$ zfs send SomePool1/SomeThing@123 | zstreamdump -v | grep 'features ='

    features = a4

Note that a4 is the flags that were in the send stream:

$ zfs send -s nocheck SomePool1/SomeThing@123 | zstreamdump -v | grep 'features ='

    features = 24

--

Darren J Moffat

Senior Software Architect - Oracle Solaris Engineering

Marked as Answer by User277246 · Sep 27 2020
1 person found this helpful
User277246

That was it.


Thanks

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Locked on Oct 17 2018
Added on Sep 17 2018
#oracle-solaris, #solaris-11
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