Hi, Dňa Tue, 21 Jan 2014 16:19:42 -0700 Bob Proulx <bob@proulx.com> napísal: > James Kirk wrote: > > I would like to install debian on a SD (I've only a Company laptop > > and I would like to not modify the standard configuration). > > Sounds reasonable to me. > > > Since SD is a flash memory and - as far as I know - it has a limited > > lifetime (in terms of I/O) not thought to run an OS, > > The quality of the SD depends upon the vendor. And unfortunately it > is a "market for lemons" in that it is difficult for consumers to know > which are better than others. But AFAIK most SD cards do implement at > least some internal spares and wear leveling. I have one RasPi device. I have second SD card Class 10 now. The disk (SD card) I/O is slow, but with the first card was even slower. The second one i was selecting by exact type from user's experiences (measurement) shared on the eLinux.org wiki. The first SD card (slower) i choose by price... ;-) > Talking about tuning the Raspbery Pi folks set vm.swappiness=1 which I > disagree with. I suggest using the Linux upstream default of > vm.swappiness=60 or even higher. Proponents of disabling program swap > by setting it low say that they never want to swap. I have the > opposite viewpoint. The point is to use the existing ram most > effectively. If that means using ram for file system buffer cache It depends. I have 1 in /proc/sys/vm/swappiness (on RasPi) and for more month the swap usage is 0. In other words - for my purposes there is a plenty of RAM. On my home computer i have 10, with no swap usage... -- Slavko http://slavino.sk
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