I need a database and a plan of attack! Post: 302600959

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Top Forums UNIX for Dummies Questions & Answers I need a database and a plan of attack! Post 302600959 by ws6transam on Wednesday 22nd of February 2012 02:05:57 PM

02-22-2012

Registered User

Directory structure

My directory structure is broken up by CD name and by station name.
I've named the discs with the three or four letter designator of the originating station, followed by a two digit numerical number representing the year or origin, followed by an arbitrary letter N, and then the disc sequence from the collection. So for instance, "SEY06N01" would represent the first disc in the sequence from the year 2006 for station SEY.

The directory structure then looks as follows:

Quote:

~/Seismic_Data_Collection/ /* Only one collection */
~/Seismic_Data_Collection/SEY /* About twenty folders (one per station) at this level */
~/Seismic_Data_Collection/SEY/SEY06N01/ /* About four thousand files at this level, or perhaps one more level of three or four subfolders in case of a station outage. */

~/Seismic_Data_Collection/SEY/SEY06N01/20060110235959.out
/* About four thousand of these files that contain raw seismic data from the originating station*/

There are about twenty station subdirectories within the directory Seismic_Data_Collection, and within each station subdirectory there may be as many as 360 subfolders. That would assume an unbroken ten-year record for that particular station, which is not the case. However a couple of the stations do have a couple-hundred CDs. SEY, for instance, has records from 2001 through 2010. Each CD folder contains only data from that particular station, and each file within each folder are supposed to be identical in length (in terms of bytes) and thus, recording time.

---------- Post updated at 02:05 PM ---------- Previous update was at 01:51 PM ----------

Hey, I think that find command might come to the rescue. I got some ideas - maybe a combination where the find is used to put out the full path, then an ls is used to gather file size & creation date. The database will be necessary when I move to the next phase which is to validate the time synchronization of continuous segments of data found within adjacent files.

I'll keep thinking about it. Thanks for the feedback.

Last edited by ws6transam; 02-22-2012 at 02:57 PM..

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LEARN ABOUT DEBIAN

ieee80211_beacon_miss

IEEE80211_BMISS(9)					   BSD Kernel Developer's Manual					IEEE80211_BMISS(9)

NAME

     ieee80211_bmiss -- 802.11 beacon miss support

SYNOPSIS

     #include <net80211/ieee80211_var.h>

     void
     ieee80211_beacon_miss(struct ieee80211com *);

DESCRIPTION

     The net80211 software layer provides a support framework for drivers that includes handling beacon miss events in station mode.  Drivers can
     dispatch beacon miss events that are recognized in hardware or net80211 can detect beacon miss if the driver dispatches received beacon
     frames through the normal receive path.  Software beacon miss support is especially useful when multiple vaps are operating and any hardware
     beacon miss support is not available (e.g. operating as an access point together with one or more station mode vaps).

     Drivers should dispatch beacon miss events recognized in the driver with ieee80211_beacon_miss().	This causes some number of ProbeRequest
     frames to be sent to the access point to check if the association is still alive.	If no response is received and roaming mode is set to
     IEEE80211_ROAMING_AUTO then net80211 will try to re-associate and if that fails trigger a scan to look for the access point or another suit-
     able AP.  When the net80211 state machine is being operated manually, e.g. by wpa_supplicant(8), then applications are notified of the state
     change and are responsible for handling the work of scanning for a new access point.  The number of beacon miss events (without a ProbeRe-
     sponse) is user settable with the IEEE80211_IOC_BMISSTHRESHOLD request.

     Software beacon miss detection is enabled per-vap by setting the IEEE80211_FEXT_SWBMISS flag.  Typically this is done when a vap is setup
     when the IEEE80211_CLONE_NOBEACONS option is supplied to the clone operation.  But drivers may also force this when they know they need help
     detecting beacon miss.  When beacon miss is detected in software the event is dispatched without driver involvement.  Note that software bea-
     con miss handling is not limited to station mode; it can be used in any operating mode where beacons from a peer station are received.

SEE ALSO

     wpa_supplicant(8), ieee80211(9), ieee80211_vap(9)

BSD
								  August 4, 2009							       BSD