Re: [Rdo-list] RDO at the CentOS Dojo in Brussels, pre-FOSDEM
On Tue, Jan 13, 2015 at 10:12:05AM -0500, Rich Bowen wrote:
[. . .]
In order to run the tutorial on your machine, we recommend a VM on
your
laptop that has 20GB+ of disk space, 2GB of ram
Rich, 2GB of memory won't suffice, I'm afraid. Why? In a DevStack
environment (a more restricted developer setup) with a single Nova
instance (running CirrOS), here's the memory profile of services that
consume more than 70MB, namely:
(Note, I removed out other serivces like systemd, libvirt, etc below,
they're noted here[1]).
$ sudo ps_mem
Private + Shared = RAM used Program
[. . .]
Nova, Python process, MariaDB, Glance:
69.1 MiB + 990.5 KiB = 70.1 MiB nova-cert
71.4 MiB + 990.0 KiB = 72.4 MiB nova-scheduler
76.7 MiB + 820.0 KiB = 77.5 MiB ovs-vswitchd
90.4 MiB + 2.6 MiB = 93.0 MiB qemu-system-x86_64
64.1 MiB + 57.3 MiB = 121.3 MiB glance-api (5)
116.6 MiB + 59.6 MiB = 176.2 MiB glance-registry (9)
180.6 MiB + 385.0 KiB = 181.0 MiB mysqld
373.2 MiB + 108.1 MiB = 481.3 MiB nova-api (13)
407.5 MiB + 78.5 MiB = 486.0 MiB python2.7 (22)
571.3 MiB + 17.2 MiB = 588.5 MiB nova-conductor (9)
---------------------------------
2.3 GiB
=================================
So, given the above, I'd suggest the virtual machine has at-least 4 GB
or above memory to have a reasonably smooth experience of bringing up a
Nova instance.
[1] https://kashyapc.fedorapeople.org/virt/openstack/DevStack-memory-profile.txt
and atleast 1 dedicated cpu
core. If your laptop has the ability to run nested-virt, please enable that
and use it. It will make a large difference to performance of the overall
setup.
Yep, that's correct.
--
/kashyap