Storage network system
OwnerTakashi Chikusa, Nagomu Isobe +2inventors
InventorsTakashi Chikusa, Nagomu Isobe, Hironori Nakama, Masashi Yukawa
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Abstract
In a storage network system, a Frame relay device contains a cache memory for storing read data read from a storage device. The storage apparatus, when receiving a read request from a host machine, carries out processing of sending the data to the Frame relay device with addition of instructions for storing the data therein and when the read request is made to the same data again, processing of instructing the Frame relay device to send the data to a specified host machine. The Frame relay device carries out processing of sending the data stored in itself to the specified host machine.
Claims23
A storage network system comprising;
- a storage apparatus having a storage device for storing data therein and a storage controller unit for controlling data write and data read to the storage device;
- and
- a Frame relay device for relaying data write request and data read request from a upper level apparatus to the storage apparatus, wherein
- the Frame relay device contains a cache memory for storing read data transmitted from the storage apparatus, wherein
- the storage apparatus carries out processing of before the data sending to the Frame relay device, issue a command for storing the data in the cache memory of the Frame relay device when receiving data read request from the upper level apparatus, and processing of issuing a command to the Frame relay device to send the data to the specified upper level apparatus if the any specified upper level apparatus issues a read request for the same data again, and
- the Frame relay device carries out processing of sending the data stored in its own cache memory to the specified upper level apparatus.
A storage network system comprising:
- a storage apparatus having a storage device for storing data and a storage controller unit for controlling data write and data read to the storage device;
- and
- plural Frame relay devices for relaying data write request and data read request from a upper level apparatus to the storage apparatus, wherein
- the plural Frame relay devices have cache memory for storing data read out from the storage device, and
- the storage apparatus carries out processing of sending the data to the Frame relay device with addition of instructions for storing the data in the cache memory of the Frame relay device when receiving data read request from the upper level apparatus, and processing of instructing the Frame relay device to send the data to a specified upper level apparatus if a read request for the same data occurs,
- the Frame relay device carries out processing of sending the data stored in its own cache memory to the specified upper level apparatus,
- the Frame relay device carries out processing of storing a part of the data when storing the data,
- the storage apparatus carries out processing of accessing remaining data of the data in said storage device while the Frame relay device is transmitting the part of the data to the specified upper level unit and
- a command and a frame having a short response are sent or received between the storage apparatus and the Frame relay device.
Dependencies are inferred from the claim text.