Thanks for your reply. On Thu, Mar 27, 2014 at 8:41 PM, Charles Steinkuehler < char...@steinkuehler.net> wrote:
> On 3/26/2014 10:22 PM, Yiling Cao wrote: > > Thanks Brandon for your experience. I do agree with that better to put > > whole disk read only. > > > > But how do iPhone and Android survive? Esp for those Android phones? They > > are very prone to sudden power removal as well. > > What? These devices are battery powered, and other than opening the > case and physically removing the battery they are guaranteed enough > power to do a proper and orderly shutdown. > > What I mean is you can take out battery at back very easily as well. > > How do routers handle this issue? they save the settings on different > > devices? > > Routers save a very small amount of setup data, and either have a very > small window when they are writing updates to the filesystem, or in some > cases can store the configuration in EEPROM. > > > I have a SQLite db around 1-2M and data will be written to them. Would > like > > to have some easy and quick solution to make it absolutely stable. > > I don't think "easy and quick" go together with "absolutely stable" in > this context. You're looking at solutions like adding a backup battery, > migrating your SQLite db to a different storage device, or other > solutions that do not fit the "easy and quick" description. > > I think about the simplest thing you can do is add a uSD card and > separate the OS from the data storage. This gets you around the problem > of corrupting the OS when writing to the data, but you can still run > into problems because the uSD card need to have specific boot files > present or the BBB won't boot. That problem can be fixed by updating > the u-boot configuration on the eMMC so it ignores the uSD card and > always boots from eMMC. > > You'll still need to be able to deal with data corruption in your db > files, but that's a solvable software problem if the system reliably boots. > > I have already minimized data writes. I hope by next version I will write stuff to eeprom. > -- > Charles Steinkuehler > char...@steinkuehler.net > > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to the Google Groups > "BeagleBoard" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to beagleboard+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
