Abstract: A method includes determining, by a storage unit of a dispersed storage network (DSN), a storage unit memory pressure level. When the storage unit memory pressure level compares unfavorably to a threshold, the method further includes, in response to a data access request regarding an encoded data slice from a computing device, determining whether the data access request includes an override message or a non-override message. When the data access request includes the non-override message, the method includes generating a storage unit memory pressure level message in accordance with the storage unit memory pressure level and the type of data access request, sending the storage unit memory pressure level message to the computing device, and processing the data access request in accordance with the storage unit memory pressure level message. When the data access request includes the override message, the method further includes processing the data access request.

Abstract: A method for execution by a computing device includes, for each update operation of a plurality of update operations, creating a new batch update containing the update operation. The update operation is evaluated in an empty transaction context to generate cached values. When it is determined that the new batch overlaps with an existing waiting batch, the new batch is merged with the existing waiting batch, and intermediate are generated based on serially composing the update operations of the merged batches. When it is determined that the new batch overlaps with a running batch, the new batch is added to the existing waiting batches. Otherwise, immediate running of the new batch is authorized. The new batch is run by creating a CASN transaction from its evaluated transaction context that includes the cached values.

Abstract: A method includes determining, by a storage unit of a dispersed storage network (DSN), a storage unit memory pressure level. When the storage unit memory pressure level compares unfavorably to a threshold, the method further includes, in response to a data access request regarding an encoded data slice from a computing device, determining whether the data access request includes an override message or a non-override message. When the data access request includes the non-override message, the method includes generating a storage unit memory pressure level message in accordance with the storage unit memory pressure level and the type of data access request, sending the storage unit memory pressure level message to the computing device, and processing the data access request in accordance with the storage unit memory pressure level message. When the data access request includes the override message, the method further includes processing the data access request.

Abstract: A method for execution by a computing device includes, for each update operation of a plurality of update operations, creating a new batch update containing the update operation. The update operation is evaluated in an empty transaction context to generate cached values. When it is determined that the new batch overlaps with an existing waiting batch, the new batch is merged with the existing waiting batch, and intermediate are generated based on serially composing the update operations of the merged batches. When it is determined that the new batch overlaps with a running batch, the new batch is added to the existing waiting batches. Otherwise, immediate running of the new batch is authorized. The new batch is run by creating a CASN transaction from its evaluated transaction context that includes the cached values.