Q/Restore is the only restore accelerator for physical media available in the HP NonStop marketplace. Q/Restore’s patented “random tape access” technology allows selected files and/or fileset(s) to be located and restored in a fraction of the time it would take to complete a traditional restore. The performance improvement is up to and in excess of a factor of 1200%. That reduces a 4 hour restore to less than 40 minutes. As a byproduct of the methodology, the number of I/Os required for restore to scan the tape media is greatly reduced. Thus, improving the efficiency of the restore process.
Q/Restore is available in several versions, depending on the catalog software that is used to store backup listing information. In addition to the original Q/Restore release designed to run within the Q/Tos environment and as a stand-alone process, Q/Restore is available for use with DSM/TC and the technology has been utilized to create Q/Recover for use with TMF.
Q/RESTORE – The original version which works within the Q/Tos environment. Information is gathered from the Q/Tos database. Q/Restore is started using the QRESTORE command in QTOSCOM.
Q/REST/SA – Retrieves its data from the backup listing in the spooler. Q/REST/SA is started by the user from a TACL prompt with the same syntax as the NonStop RESTORE program.
Q/REST/DT – Retrieves its data from the DSM/TC database via SPI calls to MEDIASERV. Q/REST/DT is started from a RECOVER DATAFILE mediacom command and is completely transparent to the user. This program must reside in the same subvolume as the RESTORE program. It is required that a user library be attached to the mediaserv program file.
Q/RECOVER – Retrieves its data from the TMF database via SPI calls to TMFSERV. Q/Recover is started by the TMF control program thru a RECOVER FILES TMFCOM command and is completely transparent to the user. This program can reside anywhere, but the location must be noted to TMF by a TMFCOM alter command. There is also a user library that has to be attached to the TMFDR program file.