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NOTICE: This version of the NSF Unidata web site (archive.unidata.ucar.edu) is no longer being updated.
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Is there one type of filesystem that is more efficient at handling these types file large volumes of finds/creations/deletions? ie. EXT4, zfs. - Mike > On Oct 28, 2015, at 11:56 AM, Tom Yoksas <yoksas@xxxxxxxx> wrote: > > All, > > re: how to efficiently scour LDM-created data products from disk > > If one organizes one's data files into daily directories, the need to > 'find' each file that should be scoured can be pared down to finding > which directories+contents need to be scoured. This does not, however, > get around the fact that deleting large numbers of files > (e.g., millions for NEXRAD Level III files kept on disk for long > periods of time) is a _very_ costly endeavor. > > Cheers, > > Tom > >> On 10/28/2015 09:47 AM, Gerry Creager - NOAA Affiliate wrote: >> How often to you run your scour command? We've exercised scour pretty >> hard and were able to watch it keep up, if it were run frequently. >> There's a one-time penalty, if you've been running it, say, daily or >> less frequently, but if you run it hourly, it should keep up. >> >> gerry >> >> On Wed, Oct 28, 2015 at 10:39 AM, Steve Emmerson <emmerson@xxxxxxxx >> <mailto:emmerson@xxxxxxxx>> wrote: >> >> LDMers, >> >> On Wed, Oct 28, 2015 at 9:28 AM, Donna Cote <d-cote@xxxxxxxx >> <mailto:d-cote@xxxxxxxx>> wrote: >> >> I would like to ask for a more io-friendly scour utility. >> >> >> It's on my list (see <https://github.com/Unidata/LDM/issues/27>. >> Can't say when I'll get around to it, though. >> >> Regards, >> Steve Emmerson >> >> _______________________________________________ >> ldm-users mailing list >> ldm-users@xxxxxxxxxxxxxxxx <mailto:ldm-users@xxxxxxxxxxxxxxxx> >> For list information or to unsubscribe, visit: >> http://www.unidata.ucar.edu/mailing_lists/ >> -- >> Gerry Creager >> NSSL/CIMMS >> 405.325.6371 >> ++++++++++++++++++++++ >> “Big whorls have little whorls, >> That feed on their velocity; >> And little whorls have lesser whorls, >> And so on to viscosity.” >> Lewis Fry Richardson (1881-1953) >> >> _______________________________________________ >> ldm-users mailing list >> ldm-users@xxxxxxxxxxxxxxxx >> For list information or to unsubscribe, visit: >> http://www.unidata.ucar.edu/mailing_lists/ > > -- > +----------------------------------------------------------------------+ > * Tom Yoksas UCAR Unidata Program * > * (303) 497-8642 (last resort) P.O. Box 3000 * > * yoksas@xxxxxxxx Boulder, CO 80307 * > * Unidata WWW Service http://www.unidata.ucar.edu/ * > +----------------------------------------------------------------------+ > > _______________________________________________ > ldm-users mailing list > ldm-users@xxxxxxxxxxxxxxxx > For list information or to unsubscribe, visit: > http://www.unidata.ucar.edu/mailing_lists/
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