What is a coarse grained lock?

A Coarse-Grained Lock is a single lock that covers many objects. It not only simplifies the locking action itself but also frees you from having to load all the members of a group in order to lock them.

What is the difference between fine grained and coarse grained?

Coarse-grained materials or systems have fewer, larger discrete components than fine-grained materials or systems. A coarse-grained description of a system regards large subcomponents. A fine-grained description regards smaller components of which the larger ones are composed.

What is lock in distributed system?

A lock is a variable associated with a data item that determines whether read/write operations can be performed on that data item. Generally, a lock compatibility matrix is used which states whether a data item can be locked by two transactions at the same time.

What is fine-grained lock?

If you have one mutex protecting an entire program, then it is coarse-grained locking. If you have many mutex, say, one per integer in your program that you might want to read or write, then you have fine-grained locking.

How does grain size affect ductility?

A finer grain size means more grain boundaries, and more grain boundaries means a greater resistance to dislocation. It is the measured ability of a material to withstand serious plastic deformation, making the material less ductile.

What is coarse grained in software?

Coarse-grained systems consist of fewer, larger components than fine-grained systems; a coarse-grained description of a system regards large subcomponents while a fine-grained description regards smaller components of which the larger ones are composed.

What is pessimistic concurrency?

Pessimistic concurrency involves locking rows at the data source to prevent other users from modifying data in a way that affects the current user.

What is grain size in parallel computing?

In parallel computing, granularity (or grain size) of a task is a measure of the amount of work (or computation) which is performed by that task. Granularity is usually measured in terms of the number of instructions executed in a particular task.