Abstract: A method for managing lost content change requests (CCRs), the method includes (i) maintaining, by compute entities of a second storage system (SSS), states of executions of multiple CCRs of multiple categories and of multiple SSS reception times; (ii) receiving, from a first storage system (FSS), at a failure indication reception time (FIRT), a failure indication that is indicative of a certain category of the multiple categories. The certain category is associated with a failure of the FSS to receive a response, from the SSS, to a certain CCR of the certain category, that was presumably sent from the FSS to the SSS; (iii) determining, based on states of executions that are related at least to the certain category, when the SSS has completed to execute all CCRs of at least the certain category that were received by the SSS up to the FIRT; and (iv) transmitting, by the SSS, a SSS completion indication that indicates that the SSS has completed to execute all tasks that were received by the SSS up to the FIRT.

Abstract: A method for network group based access control, the method may include (i) receiving a request to access content stored in a storage system, the request is associated with a user and a network group that is suggested to include the user; (ii) generating a user key based on an identifier of the user and the network group; (iii) determining, based in part on the user key, whether the user is a current user of the network group, and (iv) declining the request when the user is not the current user of the network group. The determining may include determining that the user is not a current user of the network group when a user finding timestamp of the user precedes a network group finding timestamp of the network group.

Abstract: The presently disclosed subject matter includes various inventive aspects, which are directed to direct read access of a host computer device to a share storage space in a data storage system, as well as control of the direct read of the host computer device by a control computer device in the data storage system.

Abstract: The presently disclosed subject matter includes various inventive aspects, which are directed to direct read access of a host computer device to a share storage space in a data storage system, as well as control of the direct read of the host computer device by a control computer device in the data storage system.

Abstract: According to an aspect of the presently disclosed subject matter, there is provided a system for managing data in a storage system, the system including a storage layer which provides storage resource, and a snapshot layer that includes: a volume-version data structure, a chunk-version data structure and a IO handler.

Abstract: According to an aspect of the presently disclosed subject matter, there is provided a system for managing data in a storage system, the system including a storage layer which provides storage resource, and a snapshot layer that includes: a volume-version data structure, a chunk-version data structure and a IO handler.

Abstract: There is provided a computerized method, computerized system, a non-transitory program storage device and a computer program product for enabling allocation of segments in a RAID stripe to respective storage devices in a corresponding RAID group. A randomized distribution scheme is generated for randomly distributing the data segments and syndrome segments in a RAID stripe to respective storage devices in the RAID group. The randomized distribution scheme is used for distributing the segments in the at least one RAID stripe to the storage devices in the RAID group, such that any two failed storage devices in the RAID group would have the same first probability (P) for being protected by the same type-1 syndrome segment and the same second probability (1-P) for each one of the two failed storage devices being protected by a different type-1 syndrome segment, irrespective of the relative location of the two failed storage devices.

Abstract: There is provided a computerized method, computerized system, a non-transitory program storage device and a computer program product for enabling allocation of segments in a RAID stripe to respective storage devices in a corresponding RAID group. A randomized distribution scheme is generated for randomly distributing the data segments and syndrome segments in a RAID stripe to respective storage devices in the RAID group. The randomized distribution scheme is used for distributing the segments in the at least one RAID stripe to the storage devices in the RAID group, such that any two failed storage devices in the RAID group would have the same first probability (P) for being protected by the same type-1 syndrome segment and the same second probability (1-P) for each one of the two failed storage devices being protected by a different type-1 syndrome segment, irrespective of the relative location of the two failed storage devices.

Abstract: There is provided a computerized method, computerized system, a non-transitory program storage device and a computer program product for enabling allocation of segments in a RAID stripe to respective storage devices in a corresponding RAID group. A randomized distribution scheme is generated for randomly distributing the data segments and syndrome segments in a RAID stripe to respective storage devices in the RAID group. The randomized distribution scheme is used for distributing the segments in the at least one RAID stripe to the storage devices in the RAID group, such that any two failed storage devices in the RAID group would have the same first probability (P) for being protected by the same type-1 syndrome segment and the same second probability (1-P) for each one of the two failed storage devices being protected by a different type-1 syndrome segment, irrespective of the relative location of the two failed storage devices.