Re: [brooklyn-dev] Object store persistence

[Alex Heneveld <al...@cloudsoftcorp.com>]

+1 -- this will be excellent

re syntax of `--persistenceLocation` are you thinking that's the same 
location spec strings we use elsewhere (e.g. named location or jclouds 
name):

     --persistenceLocation jclouds:aws-ec2

that is nice and simple.  although this will need extending again to 
support platforms such as mongo or riak or couchbase, i think that's fair.

re default path in cloud providers, i'm not a fan of putting everything 
in the root!  `PERSISTENCE_DIR` currently defaults to 
`brooklyn-persisted-state/data`, see 
`BrooklynServerConfig.getPersistenceDir()`; we could use that. (however 
the method `getPersistenceDir()` will need refactoring to take a cloud 
location so that it can tell whether it should be `relativeToBase` (ie 
no location) or absolute (in a blobstore or other document store).

best
alex


On 14/05/2014 09:50, Andrea Turli wrote:
> Hi,
>
> I'm thinking about adding support to persist to generic object store.
> The basic idea is to use the jclouds blobStore abstraction and give 
> users the ability to specify a `persistenceLocation` that can is a 
> location spec, where they can specify the cloud provider they want to 
> use.
> By default, If `persistenceLocation` is not specified the 
> `persistenceDir` will be created on the local filesystem at the 
> desired path (as it is now). If `persistenceLocation` is specified, 
> `persistenceDir` will be used as relativePath inside the cloud 
> providers (s3:/path/specified/by/persistenceDir), if available, 
> otherwise the serialized brooklyn objects will be created in the root 
> folder of the account.
>
> Long-term, it would be nice to add a jsonSerializer to support nosql 
> technologies that support only json documents.
>
> Any thoughts?
>
> Best,
> Andrea
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