Method for reusing identifiers to improve performance of open and close input/output requests for client drive redirection

A non-transitory computer-readable medium comprising instructions that are executable in a remote desktop system, wherein the instructions when executed cause the remote desktop system to carry out a method of performing open and close input/output (I/O) requests targeting a directory of a client computing device during a process of copying a plurality of files of the directory from the client computing device to a host server that is hosting a remote desktop accessed by the client computing device, the method comprising:

• receiving a first I/O request to open the directory, from a driver of the host server;
• forwarding the first I/O request to the client computing device;
• in response to the first I/O request, receiving an identifier (ID) of the directory from the client computing device and transmitting the ID to the driver;
• in response to receiving a second I/O request to close the directory, from the driver,
• responding to the driver with an indication that the directory was successfully closed without forwarding the second I/O request to the client computing device,
• storing the ID in a cache in association with a path and open parameters of the directory, and
• waiting for a predetermined amount of time to elapse during which unless the ID is retrieved from the cache during the predetermined amount of time;
• in response to receiving a third I/O request to open the directory from the driver prior to the elapsing of the predetermined amount of time,
• determining whether the third I/O request conflicts with the path or the open parameters associated with the stored ID,
• retrieving the ID from the cache in response to determining that the third I/O request does not conflict with the path or the open parameters associated with the stored ID, and
• transmitting the ID to the driver again;
• and
• in response to determining that the predetermined amount of time during which the ID is not retrieved from the cache has elapsed, forwarding the second I/O request to close the directory to the client computing device.

A remote desktop system comprising:

• a client computing device storing a directory including a plurality of files to be copied to the host server;
• and
• a host server including a software program and a driver, wherein the software program is configured to:
• receive a first I/O request to open the directory, from the driver;
• forward the first I/O request to the client computing device;
• in response to the first I/O request, receive an identifier (ID) of the directory from the client computing device and transmit the ID to the driver;
• in response to receiving a second I/O request to close the directory, from the driver,
• respond to the driver with an indication that the directory was successfully closed without forwarding the second I/O request to the client computing device,
• store the ID in a cache in association with a path and open parameters of the directory, and
• wait for a predetermined amount of time to elapse during which unless the ID is retrieved from the cache during the predetermined amount of time;
• in response to receiving a third I/O request to open the directory from the driver prior to the elapsing of the predetermined amount of time,
• determine whether the third I/O request conflicts with the path or the open parameters associated with the stored ID,
• retrieve the ID from the cache in response to determining that the third I/O request does not conflict with the path or the open parameters associated with the stored ID, and
• transmit the ID to the driver again;
• and
• in response to determining that the predetermined amount of time during which the ID is not retrieved from the cache has elapsed, forward the second I/O request to close the directory to the client computing device.