US 11,853,559 B1
Mirror write consistency check policy for logical volume manager systems
Lakshmi Yadlapati, Austin, TX (US); Veena Ganti, Austin, TX (US); Rui Yang, Austin, TX (US); and Virginia Ann Wigginton, Hutto, TX (US)
Assigned to International Business Machines Corporation, Armonk, NY (US)
Filed by International Business Machines Corporation, Armonk, NY (US)
Filed on Sep. 22, 2022, as Appl. No. 17/934,282.
Int. Cl. G06F 3/06 (2006.01)
CPC G06F 3/0619 (2013.01) [G06F 3/065 (2013.01); G06F 3/067 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A computer-implemented method (CIM) comprising:
receiving, by a first logical volume (LV) of a volume group (VG), an original user data set, with the original user data set being stored on a first virtual persistent memory disk;
mirroring, by a mirror write consistency check (MWCC) policy, the original user data set from the first copy of the LV to a second copy of the LV;
determining that a first portion of the original user data set is not mirrored from the first copy of the LV to the second copy of the LV;
assigning a set of virtual persistent memory disk to each logical partition of a plurality of logical partitions, with each logical partition tracking a pre-defined number of write operations;
examining, by the mirror write consistency check policy, a first portion of the set of virtual persistent memory disks to determine which write operation of the pre-defined number of write operations were erroneous; and
responsive to the examination, mirroring, by the MWCC policy, the write operations that were deemed to be erroneous from the first copy of the LV to the second copy of the LV.