[infinispan-dev] Cluster scaling

[Matej Lazar]

On 25/10/12 17:47, Thomas Fromm wrote:
> On 25.10.2012 17:03, Matej Lazar wrote:
>> Yes, CapeDwarf uses Infinispan as persistent store.
>>
>> IMO Infinispan should provide setting to enable lossless shutdown, if we want to use it for storage or distributed file system etc. As I understand external storage is the only option.
>>
>> In a cloud environment, where nodes (server instances) come and go, relaying on external storage will force a user to use centralized store. Which is not the best solution if a user has requirements to work with distributed storage in the first place.
> 
> Yes, nodes come and go... and some of them maybe not leave gracefully...
> 
> Increase number of owners inside distributed caches to reduce risk. :-)

Increasing the number of owners, seem more like workaround.
More owners should protect as against data loss in case of failures,
where we are not expecting to lose many nodes at the same time.
But if we want to achieve fully elastic behaviour, where number of nodes can drop from eg. 100 to 90,
we don't want to replicate data so many times, just because some piece of data may be replicated exactly on this nodes.

Matej.

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