would you recommend me for small debian linux with small apache, small mysql and primary datastore with SW RAID 5 just 32bit debian or rather 64bit and why?I have only 2 GB of RAM, so could that be enough. (it will be only CLI debian without Xserver, GUI and so on!)
Atom 230 + 2GB RAM datastore for small server = 64 bit or 32 bit debian
linux;debian;raid
Here are some pros and cons if you use 64-bit. Pros: native CPU instruction set, some integer counters in Linux will be 64-bit size, like those you see on /proc/net/dev which restart from 0 when reaching max value (quite early if using 32-bit), some programs will run significantly faster if they make use of 64-bit calculation (usually compression and crypting are among those). Cons: program binaries are usually a little bigger to store on disk, running programs may use slightly more RAM. If your not using an embedded system, nor have special needs, I would go for 64-bit. Afterall, 32-bit is getting old now, and 64-bit is the future/present... 