to the unique erase-before-write characteristic
of ash memories, ash-based solid-state disks (SSDs) use out
of-place update and require a garbage collection process to
recycle invalid data space. This process brings extra operations
and latencies, causing blocking and performance
degradation, especially when the device is close to be full. In
this work, we use a parallel-un it-aware allocation policy for the
internal migrating write and incoming requesting write,
scheduling and packing all the operations together to utilize
the micro-architecture parallelism of multi-channel SSDs.
Trace-driven simulations reveal that the proposed design
reduces of response time, on average, thus improves
the device performance.