Event-Driven Circular Hard Disk Data Buffering Reference Example
PrintOverview
For engineers who build event-driven, high channel-count data logging systems, hard disk-based circular buffers allow the system to log a comprehensive data set. Unlike conventional RAM buffering, circular hard disk buffers support very long data records that can extend for minutes before and after the event.
Downloads
Filename: readarchivefileexample.llb
Requirements: View
Filename: circbuffexample.llb
Requirements: View
Description
This example LabVIEW code illustrates how to implement an event driven file archiving system for high channel count, high speed data acquisition. The solution uses a large circular hard disk buffer to store several minutes of data continuously. There are two LabVIEW LLBs that are linked to this document. The first one, circFileBuffExample.llb, contains the source code for the circular file buffer implementation. The second, readArchiveFileExample.llb, contains the source code to read one of the archive files generated by the circFileBuffExample.llb code set. For a detailed description of the concepts used in this program, please see the related Application Note "Event-Driven Circular Hard Disk Data Buffering" linked to this example.
Requirements
Filename: readarchivefileexample.llb
Software Requirements
Application Software: LabVIEW Professional Development System 7.1
Language(s): LabVIEW
Software Requirements
Application Software: LabVIEW Professional Development System 7.1
Language(s): LabVIEW
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This example program (this "program") was developed by a National Instruments ("NI") Applications Engineer. Although technical support of this program may be made available by National Instruments, this program may not be completely tested and verified, and NI does not guarantee its quality in any way or that NI will continue to support this program with each new revision of related products and drivers. THIS EXAMPLE PROGRAM IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND AND SUBJECT TO CERTAIN RESTRICTIONS AS MORE SPECIFICALLY SET FORTH IN NI.COM'S TERMS OF USE (http://ni.com/legal/termsofuse/unitedstates/us/).