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<div>Hello,</div>
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<div>I am running thousands of containers (1.0.0 beta2 kernel 3.11.9) – each with one physical interface-</div>
<div> and suffering from relatively slow startup rate : it takes 30 minutes to start 5000 containers.</div>
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<div>During the startup period, the CPU is not busy (below 20%). There is no disk involved as I run on a RAM disk.</div>
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<div>I know that transferring interfaces to a namespace takes time.</div>
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<div>The following script takes 24 minutes on the same platform :</div>
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date</p>
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for i in $(seq 1 5000) </p>
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do</p>
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ip netns add sp$i</p>
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ip link add a$i type veth peer name b$i</p>
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ip link set a$i netns sp$i</p>
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done</p>
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Date</p>
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<div>Starting 5000 containers without interface (only lo0) takes 11 minutes. So adding 24 to 11 is approximatively 30 minutes.</div>
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<div>Is there a way to start the containers without interface at all and add the interfaces to the containers in a bulk fashion to speed up the processes ?</div>
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<div>More generally is there a reason why container creation is not eating all the CPU ? The container creation processes takes between 10 or 20% of the host core CPU and no more.</div>
<div>Taking in account that no disk is involved as I run on a RAM disk.</div>
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<div>Thanks</div>
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<div>Benoit</div>
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