Multiple replication levels with pooled devices

A system for writing data, comprising:

• a storage pool comprising:
• a plurality of child blocks, wherein each of the plurality of child blocks comprises one selected from the group consisting of a data block and an indirect block, wherein the indirect block references at least one of the plurality of child blocks;
• a parent block referencing at least one indirect block;
• and
• a storage pool allocator configured to store the root block and the plurality of child blocks,
• a file system operatively connected to the storage pool, wherein the file system is configured to store a first block in the storage pool using the following method:
• determining a first replication type for a first block;
• determining a number of physical blocks (n1) required to write the block to the storage pool using a size of the first block and the first replication type;
• if n1 is not a multiple of a maximum supported replication level of the storage pool:
• allocating a number of padded physical blocks (p1) to n1 until n1+p1 is a multiple of the maximum supported replication level of the storage pool, and
• writing the first block to the storage pool by filling in n1 physical blocks;
• and
• if n1 is a multiple of the maximum supported replication level of the storage pool, writing the first block to the storage pool by filling in n1 physical blocks,
• wherein the first block is one selected from the group consisting of the child block and the parent block.

A non-transitory computer readable medium comprising computer readable program code embodied therein for causing a computer system to:

• receiving a first write operation for a first block;
• determining a first replication type for the first block;
• determining a number of physical blocks (n1) required to write the first block to the storage pool using a size of the first block and the first replication type;
• if n1 is not a multiple of a maximum supported replication level of the storage pool:
• allocating a number of padded physical blocks (p1) to n1 until n1+p1 is a multiple of the maximum supported replication level of the storage pool, and
• writing the first block to the storage pool by filling in n1 physical blocks;
• and
• if n1 is a multiple of the maximum supported replication level of the storage pool, writing the first block to the storage pool by filling in n1 physical blocks.