Yes, requirements seem vague. What parameters define affinity/anti-affinity?
Requirements mention >> For each VM, users should be able to provide both (Affinity VMs and >> Anti-affinity VMs) lists concurrently. For example, VM-A can have affinity >> with VMs B & C and anti-affinity with VMs D & E at the same time. >> When configuring Affinity / anti-affinity for a VM, users should be allowed >> to provide a list of affinity / anti-affinity VMs (via API) or select >> affinity /anti-affinity VMs from a list (via UI) When user specifies VM-A can have affinity with VMs B & C does that mean they should be placed on same pod or same hypervisor(cluster or host) by the allocation logic? -Prachi -----Original Message----- From: Chiradeep Vittal [mailto:chiradeep.vit...@citrix.com] Sent: Thursday, January 03, 2013 6:06 PM To: CloudStack DeveloperList Subject: Re: [DISCUSS] Affinity / Anti-affinity Rules Actually the proposal is quite vague. What does affinity mean to the end-user? What guarantees are being asked for? - the vms are on the same hypervisor (affinity) - the vms are not on the same hypervisor (anti) - the vms are interconnected by a high-speed interconnect (affinity) - the vms are in different failure domains (host/cluster/pod) I find the concept of affinity groups useful. A possible workflow would be 1. Create an affinity group of type 'Foo' 1a. Group type indicates the guarantee 2. Create a VM in the group VMs can only leave groups on vm destruction. But without the specific type of guarantee, it is hard to discuss this proposal. On 1/3/13 4:23 PM, "Manan Shah" <manan.s...@citrix.com> wrote: >Hi, > >I would like to propose a new feature for enabling Affinity / >Anti-affinity rules in CS 4.1. I have created a JIRA ticket and >provided the requirements at the following location. Please provide >feedback on the requirements. > >JIRA Ticket: https://issues.apache.org/jira/browse/CLOUDSTACK-739 >Requirements: >https://cwiki.apache.org/confluence/display/CLOUDSTACK/Affinity+-+Anti- >aff >i >nity+rules > > >Regards, >Manan Shah >
