Dynamic memory management system
A method implemented by a memory controller may comprise receiving segment pointers that identify memory devices and slices for associated segments. The method may comprise identifying a most-full first one of the memory devices. The method may comprise identifying a most-empty second one of the memory devices. The method may comprise identifying one of the segments in the most-full one of the memory devices. The method may comprise moving a slice from the identified one of the segments in the most-full one of the memory devices to the most-empty one of the memory devices. The method may comprise updating one of the segment pointers for the identified segment.
1. A method implemented by a memory controller, the method comprising:
creating segment pointers that identify physical memory devices and slices for associated segments of data in the physical memory devices;
identifying a failure in one of the physical memory devices;
identifying a segment, by searching the segment pointers on a condition that the failed one of the physical memory devices is being used, wherein the segment includes a slice in the failed one of the physical memory devices;
selecting a new slice in a new physical memory device, wherein the new physical memory device where a new slice is selected is not a physical memory device that is using the identified segment;
recreating the slice for the failed one of the physical memory devices from other slices in the identified segment;
storing the recreated slice in the new physical memory device; and
updating the segment pointer for the identified segment with the recreated slice in the new physical memory device.
2. The method of claim 1 , further comprising:
addressing segments of data in the physical memory devices using the segment pointers.
3. The method of claim 1 , wherein the associated segments of data each include multiple slices of the data stored as stripes across the physical memory devices.
4. The method of claim 3 , wherein each of the slices include individual strips of the data each forming part of a different one of the stripes.
5. The method of claim 1 , further comprising:
ignoring the identified failure on a condition that the failed physical memory device is not being used.
6. The method of claim 1 , wherein the new physical memory device where the new slice is located is a physical memory device that has a least number of slices to rewrite.
7. The method of claim 1 , wherein the new physical memory device where the new slice is selected is a different physical memory device than the failed physical memory device.
8. The method of claim 1 , further comprising locking the identified segment against concurrent access.