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Global indexing within an enterprise object store file system

  • US 8,775,486 B2
  • Filed: 05/05/2011
  • Issued: 07/08/2014
  • Est. Priority Date: 04/04/2011
  • Status: Active Grant
First Claim
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1. A computer-implemented method for cache coherency, comprising:

  • establishing one or more appliances, each defining a storage cluster;

    establishing one or more tenants spanning across said one or more appliances, wherein an application stores objects in file systems associated with said appliances and said tenants;

    establishing a global index (Gindex) including metadata relating to objects stored in association with said application, wherein each object is associated with a unique object identifier;

    replicating said Gindex to plurality of data centers supporting said one or more tenants;

    storing an original object at a first data center;

    storing a cached copy of said original object at a second data center;

    establishing a data center index for said second data center including metadata relating to cached copies of objects stored at said second data center;

    determining that said cached copy exists from said metadata of said Gindex associated with said original object; and

    aligning said cached copy of said object to said original object using metadata for said original object from a local copy of said Gindex.

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