Min, Such a notion is completely anachronistic to a client object store due to the abstraction — it is solely an operational. Hence, you won’t find space information available in object store client APIs.
The first question is what space information are you seeking? The logical size of the objects in the bucket or how much physical space in the cluster a bucket occupies? The first is simply a sum of all object sizes in the bucket. The second is very difficult to answer through the client interface due to factors such as the intra-cluster replication factor for the bucket, the use of mechanisms such as erasure encoding and compression, and the number of data centers to which the object is replicated. For these reasons, space information is typically only exposed via the operational monitoring interfaces, and would likely need to be acquired through vendor specific drivers. Thanks, -John On Jan 15, 2014, at 1:27 PM, Min Chen <min.c...@citrix.com> wrote: > Hi there, > > Does anybody out there know if AWS S3 provides programmatical way to get > bucket-level usage data? For example, used space or available space as we > current show in CloudStack dashboard for NFS secondary storage. I googled > around the web, and didn't find any S3 api to do that. Any comments will be > appreciated. > > Thanks > -min
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