摘要:
Provided are a computer program product, system, and method for granting and revoking supplemental memory allocation requests. Supplemental memory allocations of memory resources are granted to applications following initial memory allocations of the memory resources to the applications. In response to determining that available memory resources have fallen below an availability threshold, determining a weighting factor for each supplemental memory allocation based on at least one of an amount of the memory resources allocated to the supplemental memory allocation and a measured duration during which the memory resources have been allocated. At least one of the supplemental memory allocations is selected to revoke based on the determined weighting factors of the supplemental memory allocations.
摘要:
Provided are a computer program product, system, and method for granting and revoking supplemental memory allocation requests. Supplemental memory allocations of memory resources are granted to applications following initial memory allocations of the memory resources to the applications. In response to determining that available memory resources have fallen below an availability threshold, determining a weighting factor for each supplemental memory allocation based on at least one of an amount of the memory resources allocated to the supplemental memory allocation and a measured duration during which the memory resources have been allocated. At least one of the supplemental memory allocations is selected to revoke based on the determined weighting factors of the supplemental memory allocations.
摘要:
In one embodiment, a system includes a critical partitioned dataset extended (PDSE) stored to memory of the system; logic adapted for protecting the critical PDSE by creating a copy of the critical PDSE, referred to as a PDSE copy; logic adapted for providing a critical dataset redundancy (CDR) task with exclusive access to the PDSE copy; logic adapted for providing a replacement critical PDSE by redirecting corralled connections to the PDSE copy; logic adapted for protecting the replacement critical PDSE by creating a copy of the replacement critical PDSE, referred to as a replacement PDSE copy; and logic adapted for providing the CDR task with exclusive access to the replacement PDSE copy.
摘要:
Provided are a computer program product, system, and method for selecting pages implementing leaf nodes and internal nodes of a data set index for reuse in memory. Pages in the memory are allocated to internal nodes and leaf nodes of a tree data structure representing all or a portion of a data set index for the data set, wherein the leaf nodes include information on members of the data set. The internal nodes include one or more keys used to traverse the tree data structure to reach the leaf nodes to access the members of the data set. At least one page allocated to the leaf nodes and the internal nodes is selected based on durations during which the allocated pages have not been used. Pages allocated to the leaf nodes are selected for reuse at a higher rate than the pages allocated to the internal nodes.
摘要:
Provided are a computer program product, system, and method for a data set connection manager having a plurality of data sets to represent one data set. A request is processed to open a connection to a data set having members, wherein the connection is used to perform read and write requests to the members in the data set. In response to establishing the connection, establishing for the connection a primary data set having all the members; a secondary data set to which updated members in the primary data set are written; and a pending delete data set to pending delete members comprising members that are updated.
摘要:
Provided are a computer program product, system, and method for selecting pages implementing leaf nodes and internal nodes of a data set index for reuse in memory. Pages in the memory are allocated to internal nodes and leaf nodes of a tree data structure representing all or a portion of a data set index for the data set, wherein the leaf nodes include information on members of the data set. The internal nodes include one or more keys used to traverse the tree data structure to reach the leaf nodes to access the members of the data set. At least one page allocated to the leaf nodes and the internal nodes is selected based on durations during which the allocated pages have not been used. Pages allocated to the leaf nodes are selected for reuse at a higher rate than the pages allocated to the internal nodes.
摘要:
Provided are a computer program product, system, and method for a data set connection manager having a plurality of data sets to represent one data set. A request is processed to open a connection to a data set having members, wherein the connection is used to perform read and write requests to the members in the data set. In response to establishing the connection, establishing for the connection a primary data set having all the members; a secondary data set to which updated members in the primary data set are written; and a pending delete data set to pending delete members comprising members that are updated.
摘要:
In one embodiment, a system includes a critical partitioned dataset extended (PDSE) stored to memory of the system; logic adapted for protecting the critical PDSE by creating a copy of the critical PDSE, referred to as a PDSE copy; logic adapted for providing a critical dataset redundancy (CDR) task with exclusive access to the PDSE copy; logic adapted for providing a replacement critical PDSE by redirecting corralled connections to the PDSE copy; logic adapted for protecting the replacement critical PDSE by creating a copy of the replacement critical PDSE, referred to as a replacement PDSE copy; and logic adapted for providing the CDR task with exclusive access to the replacement PDSE copy.
摘要:
Provided are a computer program product, system, and method for modifying memory space allocation for inactive tasks. Information is maintained on computational resources consumed by tasks running in the computer system allocated memory space in the memory. The information on the computational resources consumed by the tasks is used to determine inactive tasks of the tasks. The allocation of the memory space allocated to at least one of the determined inactive tasks is modified.
摘要:
Provided are a computer program product, system, and method for allowing writes to complete without obtaining a write lock to a file. A lock is provided to a first request, comprising a read or write request, to access the file. A second write request is received while the first request maintains the lock. A temporary file associated with the file for the second write request is created. The second write request is controlled to write to the temporary file while the lock is held by the first request. In response to completing the first request, the lock is granted to the second write request to write the data in the temporary file to the file.