tx

The Tx class represents a single ongoing transaction. It has two subclasses:

• ReadTx is for read operations

• WriteTx is for write operations, with the following two subclasses:

  • AlignedTx is for aligned writes, which only require DRAM-to-PMEM copy

  • CoWTx is for unaligned write, and thus requires copy-on-write. It has two subclasses, SingleBlockTx if the writes is within a single block, and MultiBlockTx if the writes is across multiple blocks.