System, method and a non-transitory computer readable medium for creating a warranted snapshot

A method for providing a warranted snapshot, the method comprises:

• receiving a request to create a first warranted snapshot of a first logical volume at a first point in time;
• determining whether a type of the first warranted snapshot is writable or non-writable;
• creating a first non-writable warranted snapshot if it is determined that the type of the first warranted snapshot is non-writable and if (a) an amount of physical storage actually devoted by a storage system to the first logical volume at the first point of time does not exceed (b) a size of a free physical storage space that is available for storing any future data delta associated with the first non-writable warranted snapshot;
• creating a first writable warranted snapshot if it is determined that the type of the first warranted snapshot is writable and if (a) a size of the first logical volume at the first point of time does not exceed (b) a size of the free physical storage space that is available for storing any future data delta associated with the first writable warranted snapshot;
• wherein the creating of the first non-writable warranted snapshot comprises allocating a first virtual portion having a size that equals the amount of physical storage actually devoted to the first logical volume at the first point of time, the first virtual portion is associated with the physical storage space and is assigned for storing any future data delta associated with the first non-writable warranted snapshot;
• wherein the creating of the first writable warranted snapshot comprises allocating a first virtual portion having a size that equals the size of the first logical volume at the first point of time, the first virtual portion is associated with the physical storage space and is assigned for storing any future data delta associated with the first writable warranted snapshot.

A non-transitory computer readable medium that stores instructions to be executed by a computerized system for:

• receiving a request to create a first warranted snapshot of a first logical volume at a first point in time;
• creating the first warranted snapshot if the first warranted snapshot is non-writable and if (a) an amount of physical storage actually devoted by a storage system to the first logical volume at the first point of time does not exceed (b) a size of a free physical storage space that is available for storing any future data delta associated with the first warranted snapshot;
• wherein the creating of the first warranted snapshot comprises allocating a first virtual portion of a physical storage space that comprises the free physical storage space for storing any future data delta associated with the first warranted snapshot;
• wherein a size of the first virtual portion equals the amount of physical storage actually devoted to the first logical volume at the first point of time.

A non-transitory computer readable medium that stores instructions to be executed by a computerized system for:

• receiving a request to create a first warranted snapshot of a first logical volume at a first point in time;
• determining whether a type of the first warranted snapshot is writable or non-writable;
• creating a first non-writable warranted snapshot if it is determined that the type of the first warranted snapshot is non-writable and if (a) an amount of physical storage actually devoted by a storage system to the first logical volume at the first point of time does not exceed (b) a size of a free physical storage space that is available for storing any future data delta associated with the first non-writable warranted snapshot;
• creating a first writable warranted snapshot if it is determined that the type of the first warranted snapshot is writable and if (a) a size of the first logical volume at the first point of time does not exceed (b) a size of the free physical storage space that is available for storing any future data delta associated with the first writable warranted snapshot;
• wherein the creating of the first non-writable warranted snapshot comprises allocating a first virtual portion having a size that equals the amount of physical storage actually devoted to the first logical volume at the first point of time, the first virtual portion is associated with the physical storage space and is assigned for storing any future data delta associated with the first non-writable warranted snapshot;
• wherein the creating of the first writable warranted snapshot comprises allocating a first virtual portion having a size that equals the size of the first logical volume at the first point of time, the first virtual portion is associated with the physical storage space and is assigned for storing any future data delta associated with the first writable warranted snapshot.

A system comprising:

• a storage control unit arranged to receive a request to create a first warranted snapshot of a first logical volume at a first point in time;
• a warranted snapshot module arranged to create the first warranted snapshot if the first warranted snapshot is non-writable and if (a) an amount of physical storage actually devoted by a storage system to the first logical volume at the first point of time does not exceed (b) a size of a free physical storage space that is available for storing any future data delta associated with the first warranted snapshot;
• wherein a creation of the first warranted snapshot comprises allocating a first virtual portion of a physical storage space that comprises the free physical storage space for storing any future data delta associated with the first warranted snapshot;
• wherein a size of the first virtual portion equals the amount of physical storage actually devoted to the first logical volume at the first point of time.

A system comprising:

• a storage control unit arranged to receive a request to create a first warranted snapshot of a first logical volume at a first point in time and to determine whether a type of the first warranted snapshot is writable or non-writable;
• a warranted snapshot module arranged to create a first non-writable warranted snapshot if it is determined that the type of the first warranted snapshot is non-writable and if (a) an amount of physical storage actually devoted by a storage system to the first logical volume at the first point of time does not exceed (b) a size of a free physical storage space that is available for storing any future data delta associated with the first non-writable warranted snapshot;
• a non-warranted snapshot module arranged to create a first writable warranted snapshot if it is determined that the type of the first warranted snapshot is writable and if (a) a size of the first logical volume at the first point of time does not exceed (b) a size of the free physical storage space that is available for storing any future data delta associated with the first writable warranted snapshot;
• wherein a creation of the first non-writable warranted snapshot comprises allocating a first virtual portion having a size that equals the amount of physical storage actually devoted to the first logical volume at the first point of time, the first virtual portion is associated with the physical storage space and is assigned for storing any future data delta associated with the first non-writable warranted snapshot;
• wherein a creation of the first writable warranted snapshot comprises allocating a first virtual portion having a size that equals the size of the first logical volume at the first point of time, the first virtual portion is associated with the physical storage space and is assigned for storing any future data delta associated with the first writable warranted snapshot.