Hi,
but remember - SD cards are slower than memory, and have a finite life, I seem to remember.
We use main memory wherever possible, but automatically back up the database to SD, keeping up to 10 generations on the card
Pete
Printable View
Hi,
but remember - SD cards are slower than memory, and have a finite life, I seem to remember.
We use main memory wherever possible, but automatically back up the database to SD, keeping up to 10 generations on the card
Pete
I had heard that SD cards were slow, but I seem to remember hearing (ok, I stated it as vaguely as I remember it) that that problem has gone away. I don't notice any slowdown using an SD card versus main memory for a database.
There could be an issue with the lifespan of cards...or possibly readers. In general, I feel that flash memory is like any other memory, but not as well tested: It might fail, but if it is going to, it does it fairly early on.
My brother-in-law was telling me that there were three grades of flash memory, and there might be a high quality/high reliability version of an SD card. I have been using a standard scandisk card for a couple years now without any problem. I have another in a camera, which has worked fine, but under much less testing.
I needed the water resistance because I was developing something for a fish trap. I figured that people would eventually drop one of the PDAs in the river, and I wanted to have some idea what would happen to the data. There are a few other tests I have been meaning to do, but we decided that laptops were a better solution than PDAs, so I have moved away from the whole program now.