80ef4a6dce
Previously, we didn't allocate one core on each host to offset host memory overheads. Given that we will use 2 cores per host for SPDK using only 1G, we can relax this constraint. On a 64-core host, 2 cores will be allocated for SPDK, which will leave room for (64-2)/2 = 31 standard-2 VMs. The previous constraint left room for (63-2)/2 = 30 standard-2 VMs.
20 lines
647 B
Ruby
20 lines
647 B
Ruby
# frozen_string_literal: true
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Sequel.migration do
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change do
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alter_table(:vm_host) do
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# Previously, we didn't allocate one core on each host to offset host
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# memory overheads. Given that we will use 1 core (=2 vcpus) per host for
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# SPDK using only 1G, we can relax this constraint.
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drop_constraint :core_allocation_limit
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add_constraint(:core_allocation_limit) { used_cores <= total_cores }
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end
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# We had missed to account for SPDK in previous hosts. SPDK uses 1 vcpu in
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# all previous setups, which is one core.
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run <<~SQL
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UPDATE vm_host SET used_cores = used_cores + 1;
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SQL
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end
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end
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