Author: Dave Gomboc
Date: 11:15:09 01/20/00
Go up one level in this thread
On January 20, 2000 at 13:12:53, Jeremiah Penery wrote: >On January 20, 2000 at 12:54:53, Dave Gomboc wrote: > >>On January 20, 2000 at 12:12:44, Jeremiah Penery wrote: >> >>>On January 20, 2000 at 04:39:38, Dave Gomboc wrote: >>> >>>>On January 20, 2000 at 03:30:03, Jeremiah Penery wrote: >>>> >>>>>I can say that for native NTFS (WinNT) disk compression, there was no noticable >>>>>impact on performance for any program. I had things like TBs (Edwards) >>>>>compressed, and performance wasn't slowed at all. Before Nalimov compression, I >>>>>had those compressed that way also, with no noticable performance hit. >>>>>I think NTFS compression is a bit conservative, though, and if you use something >>>>>else, performance might be a bit less. YMMV. :) >>>>> >>>>>Jeremiah >>>> >>>>Probably NTFS was smart enough to detect that it couldn't recompress the data, >>>>and consequently left the actual data alone. Some compression implementations >>>>are not so clever. >>> >>>For which data? NTFS compressed the uncompressed Nalimov TBs from a total of >>>~22GB to about 10GB. The Edwards TBs were compressed from 2.5GB to about 1GB, >>>IIRC. >> >>Earlier in the thread I mentiioned "the latest" tablebases. By this, I meant >>the compressed Nalimov ones. I would be surprised if NTFS could do a better job >>compressing the databases than the code written specifically to do so. Maybe >>you can compare the sizes and see. > >Ah. :) I didn't realize what exactly you were talking about. > >The specific compression is better. It is about 10GB for NTFS compression vs. >6GB for the Nalimov-specific compression for the full set of 3/4/5 piece TBs. >Using NTFS compression to further compress the compressed Nalimov TBs doesn't >gain a thing. IIRC, the sizes are identical, because NTFS can't compress them >any further. That's pretty much what I expected. :) Dave
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