Abstract: A method for resolving an erred input/output (IO) flow, the method may include (i) sending over a path a remote direct write request associated with a certain address range; wherein the path is formed between a compute node of a storage system to a storage drive of the storage system; (ii) receiving by the compute node an error message related to the remote direct write request; wherein the error message does not indicate whether an execution of the remote direct write request failed or is only temporarily delayed; (iii) responding by the compute node to the error message by (a) preventing from sending one or more IO requests through the path, (b) preventing from sending at least one IO requests aimed to the certain address range; and (c) requesting, using a management communication link, to force an execution of pending IO requests that are related to the path; and (iv) reuse the path, by the compute node, following an indication that there are no pending IO requests that are related to the path.

Abstract: A storage system is provided. The storage system includes a backplane; a plurality of single port storage devices; and a plurality of controllers, wherein the backplane routes a plurality of interconnection lanes between the plurality of controllers and the plurality of single port storage devices, wherein the plurality of controllers is configured to: enable at least one second interconnection lane of the plurality of interconnection lanes when a first controller of the plurality of controllers has failed, wherein a first interconnection lane of the plurality of interconnection lanes is between the first controller and a first single port storage device of the plurality of single port storage devices, wherein the at least one second interconnection lane is between a second controller of the plurality of controllers and the first single port storage device.

Abstract: A distributed storage system. The distributed storage system includes a plurality of storage nodes (DNodes), wherein the DNodes are configured to store a plurality of elements and a plurality of data blocks, wherein each element is a persistent metadata structure, wherein at least one of the elements store at least one attribute, wherein the at least one attribute includes a plurality of pointers; and a plurality of compute nodes (CNodes), wherein each CNode has access to each of the DNodes, wherein each CNode is assigned to a respective at least one cluster of a plurality of clusters, wherein each CNode is configured to receive at least a portion of access commands directed to the respective at least one cluster and to execute the received access commands based on the plurality of elements.

Abstract: A distributed storage system. The distributed storage system includes a plurality of storage nodes (DNodes), wherein the DNodes are configured to store a plurality of elements and a plurality of data blocks, wherein each element is a persistent metadata structure, wherein at least one of the elements store at least one attribute, wherein the at least one attribute includes a plurality of pointers; and a plurality of compute nodes (CNodes), wherein each CNode has access to each of the DNodes, wherein each CNode is assigned to a respective at least one cluster of a plurality of clusters, wherein each CNode is configured to receive at least a portion of access commands directed to the respective at least one cluster and to execute the received access commands based on the plurality of elements.

Abstract: Systems and methods for leader election. A disclosed method includes sending, by a first compute node of a plurality of compute nodes, a plurality of remote procedure calls (RPCs) to a plurality of storage boxes according to an order, wherein each of the plurality of RPCs causes a leader election algorithm to execute in one of the plurality of storage boxes; and updating a state of the first compute node to “leader” when a result of executing the leader election algorithm for each of the plurality of RPCs indicates that the first compute node is elected as a leader node.

Abstract: Systems and methods for leader election. A disclosed method includes sending, by a first compute node of a plurality of compute nodes, a plurality of remote procedure calls (RPCs) to a plurality of storage boxes according to an order, wherein each of the plurality of RPCs causes a leader election algorithm to execute in one of the plurality of storage boxes; and updating a state of the first compute node to “leader” when a result of executing the leader election algorithm for each of the plurality of RPCs indicates that the first compute node is elected as a leader node.

Abstract: A storage system is provided. The storage system includes a backplane; a plurality of single port storage devices; and a plurality of controllers, wherein the backplane routes a plurality of interconnection lanes between the plurality of controllers and the plurality of single port storage devices, wherein the plurality of controllers is configured to: enable at least one second interconnection lane of the plurality of interconnection lanes when a first controller of the plurality of controllers has failed, wherein a first interconnection lane of the plurality of interconnection lanes is between the first controller and a first single port storage device of the plurality of single port storage devices, wherein the at least one second interconnection lane is between a second controller of the plurality of controllers and the first single port storage device.