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feat(instances): auto converge is on by default for a live migration

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A VM that changes its memory faster than the network carries it does
not finish a live migration without auto converge (measured: a guest
rewriting about 1.2 GB/s did not finish in 90 s over an 8.5 Gbit/s
link, and finished in 16-18 s with it). Auto converge only slows the
VM's CPUs while the migration cannot keep up, so a calm VM is not
affected.

The migrate form ticks it for a running VM. The API already documented
it as on by default but read a left-out option as off; the serializer
now has the defaults (auto converge on, compress and unsafe off) for
JSON and form-encoded requests, and the schema shows them.
This commit is contained in:
catborise 2026-10-06 17:04:03 +03:00
parent 043c24a208
commit 98bb6ebdb5
3 changed files with 69 additions and 1 deletions
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2
instances/templates/instances/settings_tab.html
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@ -626,7 +626,7 @@
<div class="row">
<div class="col-sm-6 offset-3">
<div class="form-check form-switch">
<input class="form-check-input" type="checkbox" name="autoconverge" value="true" id="autoconverge" {% if instance.status != 1 %}disabled{% endif %}>
<input class="form-check-input" type="checkbox" name="autoconverge" value="true" id="autoconverge" {% if instance.status != 1 %}disabled{% else %}checked{% endif %}>
<label class="form-check-label" for="autoconverge" title="{% trans 'Forces CPU convergence during live migration' %}">{% trans "Auto converge" %}</label>
</div>
</div>