Here is an example:

    # reduce writes to SD card
    tmpfs           /tmp            tmpfs   nosuid,nodev,size=100M         0       0
    tmpfs           /var/log        tmpfs   nosuid,nodev,nosuid,mode=0755,size=50M        0           0
    tmpfs		/var/log/nginx  tmpfs   nosuid,nodev,nosuid,mode=0755,size=20M	0	0
    tmpfs           /var/tmp        tmpfs   nosuid,nodev,size=10M         0       0
    tmpfs		/var/www/  tmpfs  nosuid,nodev,mode=0755,size=10M   0    0

Doo_Deux

i m going to test on a hard drive but thks for the tip


Roll

Stacker Saloon

saloon

Maybe.  I generate all images every 5 minutes from db data, and there are writes to the db every 18 seconds.  This db is on the SD.  

Maybe look at your fstab and mount frequently written directories to tmpfs if you don't really need them and/or turn down your logging verbosity.  There are a lot of little tweaks you can do to make things more efficient if need be. 