Persistent memory management
Apparatuses, systems, methods, and computer program products are disclosed for persistent memory management. Persistent memory management may include replicating a persistent data structure in volatile memory buffers of at least two non-volatile storage devices. Persistent memory management may include preserving a snapshot copy of data in association with completion of a barrier operation for the data. Persistent memory management may include determining which interface of a plurality of supported interfaces is to be used to flush data from a processor complex.
1 . A method comprising:
determining completion of a barrier operation for a first auto-commit memory (ACM) buffer of a first volatile memory buffer of a first non-volatile storage device;
creating a copy of data of the first ACM buffer in response to determining completion of the barrier operation, wherein the creating comprises storing the copy in a second ACM buffer of a second volatile memory buffer of a second non-volatile storage device;
dynamically switching data operations for the data of the first ACM buffer to the copy;
receiving an updated version of the data of the first ACM buffer, wherein the updated version is inconsistent with the copy; and
synchronizing, in response to a trigger associated with the first ACM buffer, the updated version of the data to the first ACM buffer and the copy, wherein the updated version of the data of the first ACM buffer is accessible to both an application for the first non-volatile storage device and an application for the second non-volatile storage device.
2 . The method of claim 1 , wherein the copy is stored on a blank page of the second ACM buffer.
3 . The method of claim 1 , further comprising providing the data of the first ACM buffer to a client from the first non-volatile storage device after recovery from a restart event.
4 . The method of claim 3 , further comprising providing the data by loading the data from the first non-volatile storage device into the first volatile memory buffer.
5 . The method of claim 1 , further comprising receiving a barrier request for the first volatile memory buffer.
6 . An apparatus comprising:
a hardware controller for one or more volatile memory buffers each associated with a non-volatile storage medium of a plurality of non-volatile storage mediums, the hardware controller configured to:
determine completion of a barrier operation for a first auto-commit memory (ACM) buffer of a first volatile memory buffer of a first non-volatile storage medium of the plurality of non-volatile storage mediums;
create a copy of data of the first ACM buffer in response to determining completion of the barrier operation, wherein the creating comprises storing the copy in a second ACM buffer of a second volatile memory buffer of a second non-volatile storage medium of the plurality of non-volatile storage mediums;
preserve the copy by dynamically switching data operations for the data of the first ACM buffer to the copy;
receive an updated version of the data of the first ACM buffer, wherein the updated version is inconsistent with the copy; and
synchronize, in response to a trigger associated with the first ACM buffer, the updated version to the first ACM buffer and the copy, wherein the version is accessible to both an application for the first non-volatile storage medium and an application for the second non-volatile storage medium.
7 . The apparatus of claim 6 , wherein the copy is stored on a blank page of the second ACM buffer.
8 . The apparatus of claim 6 , wherein the hardware controller is further configured to write the data of the first ACM buffer to the first non-volatile storage medium.
9 . The apparatus of claim 8 , wherein the hardware controller is further configured to provide the data of the first ACM buffer to a client from the first non-volatile storage medium after recovery from a restart event.
10 . The apparatus of claim 9 , wherein the hardware controller is further configured to provide the data of the first ACM buffer by loading the data from the first non-volatile storage medium into the first volatile memory buffer.
11 . The apparatus of claim 6 , wherein the hardware controller is further configured to receive a barrier request for the first volatile memory buffer.
12 . An apparatus comprising:
means for determining completion of a barrier operation for a first auto-commit memory (ACM) buffer of a first volatile memory buffer of a first non-volatile storage device;
means for creating a copy of data of the first ACM buffer in response to determining completion of the barrier operation, wherein the creating comprises storing the copy in a second ACM buffer of a second volatile memory buffer of a second non-volatile storage device;
means for dynamically switching data operations for the data of the first ACM buffer to the copy;
means for receiving an updated version of the data of the first ACM buffer, wherein the updated version is inconsistent with the copy; and
means for synchronizing, in response to a trigger associated with the first ACM buffer, the updated version to the first ACM buffer and the copy, wherein the updated version is accessible to both an application for the first non-volatile storage device and an application for the second non-volatile storage device.
13 . The apparatus of claim 12 , wherein the copy is stored on a blank page of the second ACM buffer.