Uninterrupted data flushing in storage systems
AssigneeDell Products L.P.
InventorsGeng Han, Vladimir Shveidel, Yousheng Liu
Life of this patent
Estimating the term…
Abstract
A method is used for uninterrupted data flushing in a storage system. An input/output (I/O) request is received. A pointer for a filling flushing work set (FWS) is atomically switching. A copy of the pointer for the filling FWS is saved, and the counter associated with a FWS referenced by the saved copy of the pointer is incremented. The saved copy of the pointer and the pointer for the filling FWS are compared, and upon determining that the saved copy of the pointer and the pointer for the filling are FWS equal, the I/O request is committed to a page descriptor ring and the counter associated with the FWS referenced by the saved copy of the pointer is decremented.
Claims12
A method for uninterrupted data flushing in a storage system, the method comprising:
- receiving an input/output (I/O) request;
- atomically switching a pointer for a filling flushing work set (FWS);
- saving a copy of the pointer for the filling FWS;
- incrementing a counter associated with a FWS referenced by the saved copy of the pointer;
- comparing the saved copy of the pointer and the pointer for the filling FWS;
- and
- upon determining that the saved copy of the pointer and the pointer for the filling FWS are equal, committing the I/O request to a page descriptor ring and decrementing the counter associated with the FWS referenced by the saved copy of the pointer.
A system for uninterrupted data flushing in a storage system, the system including a processor configured to:
- receive an input/output (I/O) request;
- atomically switch a pointer for a filling flushing work set (FWS);
- save a copy of the pointer for the filling FWS;
- increment a counter associated with a FWS referenced by the saved copy of the pointer;
- compare the saved copy of the pointer and the pointer for the filling FWS;
- and
- upon determining that the saved copy of the pointer and the pointer for the filling FWS are equal, commit the I/O request to a page descriptor ring and decrementing the counter associated with the FWS referenced by the saved copy of the pointer.
Dependencies are inferred from the claim text.