[Openstack-operators] [Openstack] [SWIFT] Rack-awareness
alejandro.comisario at mercadolibre.com
Thu Nov 1 17:15:36 UTC 2012
Niceeee, a good reason to wait to Grizzly (?) with our arms wide open!
Thanks for confirming that John / Lean !
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On Thu, Nov 1, 2012 at 2:07 PM, Leandro Reox <leandro.reox at gmail.com> wrote:
> Guess that what
> http://swiftstack.com/blog/2012/09/16/globally-distributed-openstack-swift-cluster/ link
> latency feature is meant to be ... but John can confirm that :)
> On Thu, Nov 1, 2012 at 1:49 PM, Alejandro Comisario <
> alejandro.comisario at mercadolibre.com> wrote:
>> John, what i think would be terrific ( i hope is not implemented, if not
>> im gonna feel a dunce ) if, for latency matters, suppose you have 4 zones,
>> 2 on each datacenter, and on each datacenter, you have 2 proxies for
>> De idea would be that there were some kind of mechanism to tell the ring,
>> what nodes are under what proxies, to give some kind of prefferece
>> regarding latency, and for example not having a proxy on DC1 to cross the
>> country to get an object from a datanode in DC2.
>> Have you thought anything like it?
>> If not, im wondering how, for example rackspace handles this kind of
>> issues ( ignoring all the CDN thing )
>> On Thu, Nov 1, 2012 at 12:55 PM, John Dickinson <me at not.mn> wrote:
>>> This is already supported in Swift with the concept of availability
>>> zones. Swift will place each replica in different availability zones, if
>>> possible. If you only have one zone, Swift will place the replicas on
>>> different machines. If you only have one machine, Swift will place the
>>> replicas on different drives.
>>> There are active discussions right now about how Swift can support a
>>> tier above these availability zones: "regions". A region would be defined
>>> by a hogher latency link and can provide additional data durability, and,
>>> depending on your deployment details, better availability.
>>> http://swiftstack.com/blog/2012/09/16/globally-distributed-openstack-swift-cluster/has more info on the ideas we're talking about.
>>> On Nov 1, 2012, at 8:45 AM, Leandro Reox <leandro.reox at gmail.com> wrote:
>>> > Hi guys,
>>> > Any plans to implement something like hadoop rack-awareness where we
>>> can define "rack" spaces to guarantee that a copy of an object is stored
>>> for example on another datacenter, on another coast. Or should this be
>>> managed by container sync to the other datacenter
>>> > I think that this can be a nice-to-have feature, i dont know if its on
>>> the dev roadmap
>>> > Best
>>> > Lean
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