System and method for stranded file opens during disk compression utility requests

An article comprising:

• a storage medium having instructions that, when executed by a computing platform, result in execution of a method comprising:
• selecting a source file to be compressed in a disk by the DCOM utility,
• wherein the source file includes one or more non-contiguous disk file extents, and
• wherein each non-contiguous disk file extent includes multiple blocks;
• creating a temporary file to copy the source file;
• copying multiple blocks in a current non-contiguous disk file extent from the source file by the DCOM utility by transferring data to the disk as a function of an NSK net transfer data limit size;
• determining whether all of the multiple blocks in the current non-contiguous disk file extent were copied to the disk;
• if not, then storing a current file descriptor of the source file in an offset field of the temporary file;
• and
• setting a current value in the offset field of a source file control block of the source file.

A computer system comprising:

• a network interface;
• an input module coupled to the network interface that receives the input data via the network interface;
• a processing unit;
• and
• a memory coupled to the processor, the memory having stored therein code which when decoded by the processor, the code causes the processor to perform a method comprising:
• selecting a source file to be compressed in a disk by the DCOM utility, wherein the source file includes one or more non-contiguous disk file extents, and wherein each non-contiguous disk file extent includes multiple blocks;
• creating a temporary file to copy the source file;
• copying multiple blocks in a current non-contiguous disk file extent from the source file by the DCOM utility by transferring data to the disk as a function of an NSK net transfer data limit size;
• determining whether all of the multiple blocks in the current non-contiguous disk file extent were copied to the disk;
• if not, then storing a current file descriptor of the source file in an offset field of the temporary file;
• and
• setting a current value in the offset field of a source file control block the source file.

A storage system for handling a stranded file open for DCOM utility requests in a NonStop Kernel comprising:

• a disk;
• a DCOM utility;
• a disk controller;
• an NSK coupled to the DCOM utility and the disk controller;
• a return buffer coupled to the disk controller and the DCOM utility;
• and
• a disk processor coupled to the DCOM utility and the disk controller, wherein the DCOM utility selects a source file to be compressed on the disk via the disk controller, wherein the source file includes one or more non-contiguous disk file extents, and wherein each non-contiguous disk file extent includes multiple blocks, wherein the DCOM utility to create a temporary file in the return buffer to copy the source file, wherein the DCOM utility to copy the multiple blocks in a current non-contiguous disk file extent from the source file by transferring data to the disk as a function of an NSK net transfer data limit size via the disk controller, wherein the disk processor to determine whether all of the multiple blocks in the current non-contiguous disk file extent were copied to the disk, and wherein the NSK to store a current file descriptor of the source in an offset field of the temporary file and set a current value in the offset field of a source FCB of the source file as a function of the determination.