What's the algorithm which selects the work? Currently my miner (HD5870) is calculating job with 50% probability in one day. Personally I'd like to prefer easier jobs even with lower income, just to have sane variance...
I think you would need to ask samr7 about it. As far as I know, the algorithm selects the most profitable job clusters (grouped by public key).
Btw. I don't see expected income for this job anywhere, is there any chance to obtain it?
I'm working on that metric.
Yeah, oclvanityminer doesn't actually display it. The algorithm it uses is essentially the following (this is the code I used to produce the above value (BTC/Gkey):
url = 'https://vanitypool.appspot.com/getWork'
try:
urlfh = urllib.urlopen(url)
except:
return 0
pubkeys = {}
for work in urlfh:
work = work.strip().strip(';')
pattern, pubkey, networkbyte, reward = work.split(':')
try:
difficulty = vanitycalc.getdiff([pattern], 0)
except:
return 0
if pubkey in pubkeys:
pubkeys[pubkey] += 1000000000.0 * float(reward) / float(difficulty)
else:
pubkeys[pubkey] = 1000000000.0 * float(reward) / float(difficulty)
max_value = 0
for pubkey, value in pubkeys.iteritems():
if value > max_value:
max_value = value
return max_value
This means it calculates the reward/difficulty for each piece of work. If a single public key has more than one job associated with it, it sums the values (reward/difficulty) for all of those jobs. It then picks the group of work (sharing a common public key) with the highest sum.
You can calculate the expected earnings for your hardware by multiplying the number obtained from that calculation by the key rate for your hardware. Currently, the max_value is:
0.0000585876 BTC/Gkey. My 5870 does about 29 Mkey/s (or 104.4 Gkey/hr), so my expected earnings are:
0.0000585876 BTC/Gkey * 104.4 Gkey/hr = 0.0061165 BTC/hr = 0.1468 BTC/day
. 
