STORAGE SYSTEM WHICH REALIZES ASYNCHRONOUS REMOTE COPY USING CACHE MEMORY COMPOSED OF FLASH MEMORY, AND CONTROL METHOD THEREOF
First Claim
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1. A storage system comprising:
- a first storage apparatus including a first processor, a first memory device providing storage area for a primary logical volume, and a first flash package which has a plurality of first flash memory chips and a first package processor and temporarily stores data to be wrote to the primary logical volume; and
a second storage apparatus including a second processor, and a second memory device providing storage are for a secondary logical volume, and receiving journal data corresponding to write data to the primary logical volume and update information, and reflecting the journal data to the secondary logical volume according to the update information;
wherein when the first storage apparatus receives a write command which requests to write a first write data to the primary volume,the first package processor in the flash package receives the first write data transferred by control of the first processor, allocates first physical area in the first flash memory chips to first cache logical area for write data managed by the first flash package, and writes the first write data to the allocated first physical area,the first package processor in the flash package receives first journal data creation request corresponding to the first write data from the first processor, and allocates the first physical area which stores the first write data to second cache logical area for journal data managed by the first flash package.
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Abstract
The first storage apparatus provides a primary logical volume, and the second storage apparatus has a secondary logical volume. When the first storage apparatus receives a write command to the primary logical volume, a package processor in a flash package allocates first physical area in the flash memory chip to first cache logical area for write data and stores the write data to the allocated first physical area. And when the package processor receives journal data creation command form the processor, allocates the first physical area to second journal area for journal data without storing journal data corresponding to the write data.
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10 Claims
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1. A storage system comprising:
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a first storage apparatus including a first processor, a first memory device providing storage area for a primary logical volume, and a first flash package which has a plurality of first flash memory chips and a first package processor and temporarily stores data to be wrote to the primary logical volume; and a second storage apparatus including a second processor, and a second memory device providing storage are for a secondary logical volume, and receiving journal data corresponding to write data to the primary logical volume and update information, and reflecting the journal data to the secondary logical volume according to the update information; wherein when the first storage apparatus receives a write command which requests to write a first write data to the primary volume, the first package processor in the flash package receives the first write data transferred by control of the first processor, allocates first physical area in the first flash memory chips to first cache logical area for write data managed by the first flash package, and writes the first write data to the allocated first physical area, the first package processor in the flash package receives first journal data creation request corresponding to the first write data from the first processor, and allocates the first physical area which stores the first write data to second cache logical area for journal data managed by the first flash package. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A control method for a storage apparatus including a processor, a plurality of memory devices, and cache package having a plurality of flash memory chips and a package processor, the control method comprising:
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providing a primary logical volume provided by the plurality of memory devices; receiving a write command which requests to write a write data to the primary logical volume; allocating, by the package processor, first physical area in the flash memory chips to first cache logical area for write data managed by the cache package, and storing the write data to the allocated first physical area; sending, by the processor, a creation command of journal data corresponding to the write data to the cache package; allocating, by the package processor, the first physical area, in which the write data is stored, to second cache logical area for journal data managed by the cache package; and sending the journal data to another storage apparatus.
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Specification