Douglas E. LeCrone - Hopkinton MA Daniel A. Murphy - Hopkinton MA Denis Hall - Chelmsford MA
Assignee:
EMC Corporation - Hopkinton MA
International Classification:
G06F 1730
US Classification:
707204, 711162
Abstract:
A method and apparatus for monitoring update activity, particularly in the form of write requests, to a data storage facility, over at least one cycle to identify any write operation or update that occurs to that data storage facility on a track-by-track basis. At the end of each cycle a list of changed tracks is stored in a data set. After information has been accumulated by a collector application, a reporter application manipulates the data to obtain information concerning the track changes and to estimate communication path requirements.
Douglas E. Lecrone - Hopkinton MA, US Paul A. Linstead - Shrewsbury MA, US Daniel A. Murphy - Hopkinton MA, US Denis E. Hall - Chelmsford MA, US Raymond Wong - Brookline MA, US Eugene D. Pflueger - Medfield MA, US Kevin C. Heasley - Franklin MA, US Michael E. Specht - Acton MA, US
Assignee:
EMC Corporation - Hopkinton MA
International Classification:
G06F012/00
US Classification:
711162, 711161, 707204
Abstract:
A data-mirroring method in which, while an I/O process is processing a first I/O request for writing data to a first device, control is obtained from that I/O process executing on a host computer. A second I/O request, this one for writing the data to the second device, is then created. Then, control is returned to the I/O process by causing the first I/O request to be made available to a first data storage system managing the first device.
Program For Monitoring Update Activity In A Data Storage Facility
A method and apparatus for monitoring update activity, particularly in the form of write requests, to a data storage facility, over at least one cycle to identify any write operation or update that occurs to that data storage facility on a track-by-track basis. At the end of each cycle a list of changed tracks is stored in a data set. After information has been accumulated by a collector application, a reporter application manipulates the data to obtain information concerning the track changes and to estimate communication path requirements.