Reducing write amplification in solid-state drives by separating allocation of relocate writes from user writes
First Claim
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1. A method, comprising:
- maintaining, by a processor, a first open logical erase block for user writes;
maintaining, by the processor, a second open logical erase block for relocate writes,wherein the first and second open logical erase blocks are different logical erase blocks;
receiving, by the processor, a first data stream having the user writes;
transferring, by the processor, the first data stream to the first open logical erase block;
receiving, by the processor, a second data stream having the relocate writes; and
transferring, by the processor, the second data stream to the second open logical erase block;
assigning a first timeout value to the first open logical erase block;
assigning a second timeout value to the second open logical erase block;
reassigning at least one of the first and second open logical erase blocks to a different data stream in response to at least one of the first and second timeouts of the respective first and second open logical erase blocks expiring.
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Abstract
In one embodiment, a method includes maintaining a first open logical erase block for user writes, maintaining a second open logical erase block for relocate writes, wherein the first and second open logical erase blocks are different logical erase blocks, receiving a first data stream having the user writes, transferring the first data stream to the first open logical erase block, receiving a second data stream having the relocate writes, and transferring the second data stream to the second open logical erase block. Other systems, methods, and computer program products are described in additional embodiments.
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Citations
14 Claims
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1. A method, comprising:
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maintaining, by a processor, a first open logical erase block for user writes; maintaining, by the processor, a second open logical erase block for relocate writes, wherein the first and second open logical erase blocks are different logical erase blocks; receiving, by the processor, a first data stream having the user writes; transferring, by the processor, the first data stream to the first open logical erase block; receiving, by the processor, a second data stream having the relocate writes; and transferring, by the processor, the second data stream to the second open logical erase block; assigning a first timeout value to the first open logical erase block; assigning a second timeout value to the second open logical erase block; reassigning at least one of the first and second open logical erase blocks to a different data stream in response to at least one of the first and second timeouts of the respective first and second open logical erase blocks expiring. - View Dependent Claims (2, 3, 4, 5)
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6. A computer program product comprising a computer readable storage medium having program instructions embodied therewith, the program instructions readable and/or executable by a processor to cause the processor to:
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receive, by the processor, a first data stream and a second data stream concurrently, wherein the first data stream includes user writes, wherein the second data stream includes relocate writes; identify, by the processor, a first open logical erase block; transfer, by the processor, the first data stream having the user writes to the first open logical erase block; terminate, by the processor, the transfer of the first data stream to the first open logical erase block; cause, by the processor, transfer of the second data stream having the relocate writes either (a) to a second open logical erase block that is different than the first logical erase block, or (b) to the first open logical erase block after the transfer of the first data stream to the first open logical erase block is terminated and the first open logical erase block is reassigned to the second data stream; assign, by the processor, a first timeout value to the first open logical erase block; assign, by the processor, a second timeout value to the second open logical erase block; and reassign, by the processor, at least one of the first and second an open logical erase block to a different data stream if in response to at least one of the first and second timeouts of the respective first and second open logical erase blocks expiring. - View Dependent Claims (7, 8, 9, 10)
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11. A system, comprising:
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a processor and logic integrated with and/or executable by the processor, the logic being configured to; maintain a first open logical erase block for user writes; maintain a second open logical erase block for relocate writes, wherein the first and second open logical erase blocks are different logical erase blocks;
receive a first data stream having the user writes;
transfer the first data stream to the first open logical erase block;
receive a second data stream having the relocate writes; and
transfer the second data stream to the second open logical erase block;assign a first timeout value to the first open logical erase block; assign a second timeout value to the second open logical erase block; reassign at least one of the first and second open logical erase blocks to a different data stream in response to at least one of the first and second timeouts of the respective first and second open logical erase blocks expiring, wherein the first and second timeout values are determined based on a logical erase block write interval. - View Dependent Claims (12, 13, 14)
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Specification