1. SUMMARY OF THE INVENTION The invention considerations a pc system executing a number of objects (e.g., processes, threads, DLLs, etc.). The invention supplies a method to improve the overall reliability of the computer system by carrying out various monitoring capabilities and taking numerous actions when problems are detected. The methodology of declare 1, wherein tracking changes to the information associated with the first snapshot contains monitoring modifications to the data associated with the primary snapshot utilizing a block filter to establish adjustments to the information associated with the first snapshot. 6 is a circulate diagram illustrating a method for restoring specific recordsdata or folders from a snapshot based on one embodiment of the current invention.
2. Each executing process 136 and 138 can embody one or more threads. In the illustrated instance, course of 136 includes a number of threads a hundred and fifty and 152, and course of 138 consists of a number of threads 154 and 156. Operating system 118 includes a scheduler 158 that manages the scheduling of various threads (and/or processes) within the pc system. In scheduling the threads, scheduler 158 determines which threads shall be executed by the processor 102 of FIG. [newline]This scheduling relies on a quantity of various factors, but is often designed to deal with threads fairly whereas permitting larger precedence threads to be given preferential therapy over decrease priority threads. Operating system 118 could be any of a big selection of working systems, such as any of the “Windows” brand of working techniques (e.g., the “Windows CE” working system) available from Microsoft Corporation of Redmond, Wash. In the illustrated example, working system 118 is a multitasking working system that permits simultaneous execution of a number of functions.
3. Alternatively, the data concerning the information and folders which might be indexed by the snapshot, e.g., file system information, are saved on the storage system. The storage manager retrieves the file and folder info for modified information that's listed by one or more snapshots for display. Once a quantity of files and/or folders are selected, step 502, the storage supervisor selects those snapshots that index the given version of the recordsdata and/or folders utilizing the replication quantity table, step 502.
4. In step 258, checkup thread 164 additionally sets a flag or other indicator in working object listing 148 that shall be detected by restoration thread one hundred seventy, as discussed in more detail beneath. The data in the media agent index cache 110 is thus available to the system to be used in storage operations and different activities without having to be first retrieved from the storage gadget 115. In some embodiments, the system stores a map, which can be part of a snapshot, to track particular files and folders with their corresponding copied clusters. The map created by studying knowledge from the file allocation table of the knowledge store and associates files and folders with the clusters saved in the snapshots.
5. A system as recited in declare 4, further comprising a notification log, coupled to the monitor, to store a report of the notification messages. Computer 302 runs an open platform operating system which supports multiple functions. Using an open platform operating system and an open laptop system structure, numerous software program applications and hardware peripherals could be produced by impartial distributors and subsequently put in by the vehicle user after purchase of the car. This is advantageous in that the software program purposes don't have to be specifically configured for uniquely designed embedded systems.
6. Checkup thread 164 then determines whether or not the selected thread has failed and if that is the case units a recovery occasion that identifies the failed thread , analogous to steps 256 and 258 mentioned above. Once a course of is selected, update thread 166 calculates the difference between the current heap allocation and an preliminary heap allocation for the process . The preliminary heap allocation and current heap allocation are obtained by update thread 166 from working system 118. For example, if working system 118 is the “Windows CE” working system, the initial heap allocation and present heap allocation could be obtained using the Heap32First and Heap32Next system calls. Alternatively, the initial heap allocation could also be obtained and stored by replace thread 166 each time update thread 166 wakes up and detects that a new course of has begun executing. All objects that are in the operating object record but are no longer working within the system are then marked .
7. 6, a flow diagram is introduced illustrating one embodiment of a technique for restoring particular person files and/or folders listed by a snapshot. For every snapshot, tn, that is taken of the information retailer, a comparability is performed such that only the clusters which have changed or been created since the last snapshot, tn-1, was taken of that volume are saved, step 310. For lacie hard drive not showing up , in some embodiments the information agent employs a block filter or related assemble identified to those of talent within the art to compare snapshot tn with tn-1 and thereby detect changed clusters on an information retailer. Alternatively, the info agent might use different techniques know within the artwork, such as Copy on Write (“COW”), to determine modified information on an data retailer. One embodiment of a snapshot used to track clusters read from the data store to clusters in a snapshot, in addition to to map file and folder names similar to the snapshot clusters, is illustrated in FIG.
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