*From: *Andrew Beekhof <and...@beekhof.net> *Sent: * 2014-06-11 02:36:15 EDT *To: *The Pacemaker cluster resource manager <pacemaker@oss.clusterlabs.org> *Subject: *Re: [Pacemaker] resources not rebalancing
> On 11 Jun 2014, at 3:44 pm, Patrick Hemmer <pacema...@feystorm.net> wrote:
>
>>> Right. But each node still has 4998000+ units with which to accommodate
>>> something that only requires 10000.
>>> Thats about 0.2% of the remaining capacity, so wherever it starts, its
>>> hardly making a dint.
>>>
>> You're thinking of the 'utilization' placement strategy.
> If something is "out of balance" by 0.2%... thats still quite balanced.
I agree, but that's not how the balanced strategy is documented as
working. It says resources are balanced based on the amount of free
capacity on each node, not based on approximate percentages.
However, to nullify this argument, I adjusted the numbers:
# crm_simulate -URL
Current cluster status:
Online: [ i-053f1f59 i-083f1f54 i-093f1f55 ]
dummy1 (ocf::pacemaker:Dummy): Started i-053f1f59
Clone Set: dummy2-clone [dummy2] (unique)
dummy2:0 (ocf::pacemaker:Dummy): Started i-053f1f59
dummy2:1 (ocf::pacemaker:Dummy): Started i-083f1f54
dummy2:2 (ocf::pacemaker:Dummy): Started i-093f1f55
dummy2:3 (ocf::pacemaker:Dummy): Started i-083f1f54
dummy2:4 (ocf::pacemaker:Dummy): Started i-093f1f55
Utilization information:
Original: i-053f1f59 capacity: cpu=50000 mem=3840332000
Original: i-083f1f54 capacity: cpu=50000 mem=3840332000
Original: i-093f1f55 capacity: cpu=50000 mem=3840332000
calculate_utilization: dummy1 utilization on i-053f1f59: cpu=40000
calculate_utilization: dummy2:1 utilization on i-083f1f54: cpu=2000
calculate_utilization: dummy2:2 utilization on i-093f1f55: cpu=2000
calculate_utilization: dummy2:0 utilization on i-053f1f59: cpu=2000
calculate_utilization: dummy2:3 utilization on i-083f1f54: cpu=2000
calculate_utilization: dummy2:4 utilization on i-093f1f55: cpu=2000
Remaining: i-053f1f59 capacity: cpu=8000 mem=3840332000
Remaining: i-083f1f54 capacity: cpu=46000 mem=3840332000
Remaining: i-093f1f55 capacity: cpu=46000 mem=3840332000
dummy1 is sharing a node with dummy2:0. The node they are on has
significantly less capacity, and is almost depleted, while the others
are largely underutilized.
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