Open Stack

Hi,

Here is the blueprint about improvement of accessing to glance API server.
  https://blueprints.launchpad.net/nova/+spec/improvement-of-accessing-to-glance

The summary of this bp is:
 - Glance API Servers are categorized into two groups: "Primary" and "Secondary".
 - Firstly, Nova tries to access Glance API Servers of "Primary" randomly.
 - If failed to access all "Primary" Servers, Nova tries to access "Secondary"
   Servers randomly.

We suppose the near servers will be treated as "Primary", and other servers
as "Secondary".

The benefits of this bp we think is as followings.
 - By listing near glance API servers and using them, the total amount of data
   transfer across the networks can be reduced.
 - Especially, in case of using microserver, accessing glance API server
   in the same chassis can make efficiency better than using in other chassis.

This can reduce the network traffic and increase the efficiency.

Please give us your advice/comment.

Regards,
E.Aikawa (aikawa at mxk.nes.nec.co.jp)