Managing I/O operations in a storage network

A method, comprising:

• performing a set of operations in association with a first remote direct memory access (RDMA) operation by a first node coupled to a second node, wherein:
• the set of operations are performed in association with a single RDMA operation;
• and
• the set of operations comprise:
• applying a first hash function on a target data object to calculate a first hash key for the target data object;
• identifying a first target storage bucket for the target data object in the second node based on a second hash key and a first map of a hash table;
• reading a first data object key for a first data object stored in the first target storage bucket;
• comparing the first data object key and the first hash key to determine a match;
• responsive to the first data object key and the first hash key not matching, determining that the first data object and the target data object are different data objects;
• and
• responsive to a determination that the first data object and the target data object are different data objects:
• reading first metadata for a first set of storage buckets including the first target storage bucket and
• comparing the first hash key to the first metadata to identify a first alternate storage bucket in a first set of storage buckets storing the target data object, wherein:
• a first storage segment comprises the first set of storage buckets;
• and
• the first set of storage buckets comprises the first target storage bucket.

A system, comprising:

• a first computing node coupled to a second computing node, wherein the first computing node includes a controller;
• means, executed by the controller, for performing a hash function on a first data object to determine a first storage bucket in a first target storage segment on the second computing node where the first data object is storable, wherein the hash function is performed using a remote direct memory access (RDMA) operation by the first computing node on the second computing node;
• means, executed by the controller, for determining that the first storage bucket is unavailable;
• and
• means, executed by the controller, for determining whether the first target storage segment is available or unavailable and, in response to determining that the first target storage segment is unavailable:
• determining whether a second target storage segment that is one hop away from the first target storage segment is available or unavailable;
• writing, using the RDMA operation, the first data object to another storage bucket in the second target storage segment in response to the determination that the second target storage segment is available;
• and
• updating, using the RDMA operation, a first map in first metadata of the second target storage segment to indicate that the first data object is stored in the other storage bucket.