In Nova, "ram_allocation_ratio" & "reserved_host_memory_mb" are not
mutually exclusive options, so they work together [0].
If it make sense or not to use "ram_allocation_ratio != 1" when
"reserved memory != 0" is up to the cloud admin (depending on your use
case, the purpose of your cloud, the
Excellent answer thank you sir.
One doubt comes into my mind is for this reservation to work RAM over
committing should be disabled?
ie ram_allocation_ratio=1
Thanks for your help
On Thu, Nov 27, 2014 at 7:20 PM, Luis Fernandez Alvarez
wrote:
> Hi,
>
> In general, you can see 'reserved_host_memo
Hi,
In general, you can see 'reserved_host_memory_mb' as your estimation of
how much memory your hypervisor needs. From the point of view of Nova,
your system is consuming the amount you set in 'reserved_host_memory_mb'
[0].
Then, the field 'free_ram_mb' (the one that is checked when VMs are
it reports "Free ram (MB): 425"
but free -m has different result.
Is it working for you.Are you using icehouse
On Thu, Nov 27, 2014 at 6:16 PM, George Mihaiescu wrote:
> Then I would enable debug and verbose in nova.conf and restart the scheduler
> service. In this way you should see in the logs
Then I would enable debug and verbose in nova.conf and restart the
scheduler service. In this way you should see in the logs the entire
scheduler logic and what resources it thinks your host has.
On 27 Nov 2014 06:20, "mad Engineer" wrote:
> George,
> overcommit of RAM is 1 and tha
George,
overcommit of RAM is 1 and that is working.However instances
are still getting created with available free memory <
reserved_host_memory_mb
On Thu, Nov 27, 2014 at 4:33 PM, George Mihaiescu
wrote:
> Depending on your overcommit ratio, the scheduler can schedule instances
>
Depending on your overcommit ratio, the scheduler can schedule instances
using more virtual memory than the available physical memory on the host,
700 MB in your case.
On 27 Nov 2014 05:36, "mad Engineer" wrote:
> hi all i have set
> reserved_host_memory_mb in nova.conf of controller and compute
hi all i have set
reserved_host_memory_mb in nova.conf of controller and compute and
restarted necessary services.
i am expecting scheduler to not pickup host that has less than what is
reserved_host_memory_mb
in my example i put reserved_host_memory_mb = 1024
and free RAM in compute node is 700 Mb
