System and method of resyncing n-way mirrored metadata on distributed storage systems without requiring checksum in the underlying storage

A method comprising:

• receiving, by a first storage subsystem of a storage system, a plurality of write requests corresponding to respective meta data blocks, wherein the first storage subsystem comprises a meta object, and wherein the meta object comprises a plurality of disks including a first disk and a plurality of second disks;
• storing, by the first storage subsystem and for each write request, in each of the disks of the meta object, a version of the corresponding meta data block comprising:
• i) a transaction ID, ii) a data integrity token, and iii) a payload comprising the data of the write request;
• executing, by the first storage subsystem, a batch write of the plurality of meta data blocks to a second storage subsystem of the storage system;
• determining that a particular disk of the meta object has failed;
• determining, using the transaction IDs and data integrity tokens of the versions of the meta data block stored in the other disks of the meta object, whether one or more valid versions of the meta data block are stored in respective other disks of the meta object;
• and
• in response to determining that one or more valid versions of the meta data block are stored in respective other disks of the meta object, resynchronizing the meta data block in the particular disk using one of the valid versions of the meta data block.

One or more non-transitory computer storage media encoded with computer program instructions that when executed by a plurality of computers cause the plurality of computers to perform operations comprising:

• receiving, by a first storage subsystem of a storage system, a plurality of write requests corresponding to respective meta data blocks, wherein the first storage subsystem comprises a meta object, and wherein the meta object comprises a plurality of disks including a first disk and a plurality of second disks;
• storing, by the first storage subsystem and for each write request, in each of the disks of the meta object, a version of the corresponding meta data block comprising:
• i) a transaction ID, ii) a data integrity token, and iii) a payload comprising the data of the write request;
• executing, by the first storage subsystem, a batch write of the plurality of meta data blocks to a second storage subsystem of the storage system;
• determining that a particular disk of the meta object has failed;
• determining, using the transaction IDs and data integrity tokens of the versions of the meta data block stored in the other disks of the meta object, whether one or more valid versions of the meta data block are stored in respective other disks of the meta object;
• and
• in response to determining that one or more valid versions of the meta data block are stored in respective other disks of the meta object, resynchronizing the meta data block in the particular disk using one of the valid versions of the meta data block.