The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 04, 2015
Filed:
May. 15, 2012
Xiaolin Wang, Odawara, JP;
Nobuyuki Saika, Yokosuka, JP;
Xiaolin Wang, Odawara, JP;
Nobuyuki Saika, Yokosuka, JP;
HITACHI, LTD., Toyko, JP;
Abstract
According to the prior art load distribution method, there was a drawback in that the time required from discovery of increase of load to the completion of countermeasures was long. In particular, upon receiving migration of data from other file devices, it was necessary to equalize not only the load accompanying normal processes but also the load accompanying the data migration processes. In a file system receiving migration of data from a plurality of file devices, a plurality of virtual NAS (VNAS) is provided within the file storage subsystem, and an associated VNAS for executing data migration from file devices and accesses from clients is respectively associated with each file storage subsystem. Then, the state of each VNAS is defined based on the state of progress of data migration in the file storage subsystem. According to the defined state, load distribution among VNAS is performed.