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Ran 13 Aug 2024 12:14AM UTC

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Committed 13 Aug 2024 12:06AM UTC coverage: 59.141% (-0.03%) from 59.171%

Job # #4852.1

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push

travis-ci

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web-flow

Commit Message

nbdkit datapath debug (#3361)

* pkg/image/nbdkit: Enable controlpath debugging

Disabling datapath debugging reduces noise, but controlpath debugging
is actually useful, not very noisy, and usually you would want it to
be enabled.

The difference is explained here:

https://libguestfs.org/nbdkit.1.html#SERVER-DEBUG-FLAGS

Virt-v2v disables datapath debugging but keeps controlpath debugging
enabled.

Signed-off-by: Richard W.M. Jones <rjones@redhat.com>

* pkg/image/nbdkit: Enable recommended nbdkit VDDK debugging options

VDDK datapath debugging logs every VDDK read and write which is noisy
and unnecessary.

Enabling VDDK stats gives useful information about how long each VDDK
call took, for virtually no overhead.  This information is printed to
stderr when nbdkit closes the connection.

This matches the upstream recommendations here, and also the flags
used by virt-v2v:

https://libguestfs.org/nbdkit-vddk-plugin.1.html#Troubleshooting-performance-problems

Signed-off-by: Richard W.M. Jones <rjones@redhat.com>

---------

Signed-off-by: Richard W.M. Jones <rjones@redhat.com>

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