CKpool Solo Pool Ubuntu Difficulty always 0.0

[Vizzy]

Hi there,

I am running my own BTC node &  Solo CKpool on Ubuntu.  I have an antiminer s9K with 1 hashboard and have been running since last Christmas.   There are no errors in logs, everything looks good just for one thing I am questioning.  In the ckpool log, there is the ("diff": 0.0 ) entry in the pool log and it always shows 0.0.    Every other entry on the log, updates correctly and on the antminer, everything looks great.

Is it ok that the diff:0.0 is 0.0?  See attached logs and highlighted red entries.  Also attached is my ckpool config
**********

[2025-03-12 21:29:12.589] Pool:{"runtime": 1260, "lastupdate": 1741829352, "Users": 1, "Workers": 1, "Idle": 0, "Disconnected": 0}
[2025-03-12 21:29:12.589] Pool:{"hashrate1m": "4.22T", "hashrate5m": "4.96T", "hashrate15m": "4.94T", "hashrate1hr": "14.7T", "hashrate6hr": "13.8T", "hashrate1d": "6T", "hashrate7d": "3.35T"}
[2025-03-12 21:29:12.589] Pool:{"diff": 0.0, "accepted": 2769230635, "rejected": 707625, "bestshare": 1701820452, "SPS1m": 0.255, "SPS5m": 0.31, "SPS15m": 0.347, "SPS1h": 0.418}
[2025-03-12 21:29:18.062] Stored local workbase with 4820 transactions
[2025-03-12 21:29:52.872] Stored local workbase with 4809 transactions
[2025-03-12 21:30:12.594] User bc1qsc:{"hashrate1m":"3.97T","hashrate5m":"4.77T","hashrate1hr":"14.6T","hashrate1d":"6.44T","hashrate7d":"3.3T","lastshare":1741829400,"workers":1,"shares":1638890517,"bestshare":691603928.27803731,"bestever":691603928,"authorised":1739747080}
[2025-03-12 21:30:12.595] Pool:{"runtime": 1320, "lastupdate": 1741829412, "Users": 1, "Workers": 1, "Idle": 0, "Disconnected": 0}
[2025-03-12 21:30:12.595] Pool:{"hashrate1m": "3.23T", "hashrate5m": "4.56T", "hashrate15m": "4.8T", "hashrate1hr": "14.5T", "hashrate6hr": "13.7T", "hashrate1d": "6T", "hashrate7d": "3.35T"}
[2025-03-12 21:30:12.595] Pool:{"diff": 0.0, "accepted": 2769269245, "rejected": 707625, "bestshare": 1701820452, "SPS1m": 0.195, "SPS5m": 0.284, "SPS15m": 0.336, "SPS1h": 0.414}
[2025-03-12 21:30:23.062] Stored local workbase with 4755 transactions
[2025-03-12 21:30:57.877] Stored local workbase with 4715 transactions
[2025-03-12 21:31:12.600] User bc1qsc:{"hashrate1m":"5.58T","hashrate5m":"4.98T","hashrate1hr":"14.5T","hashrate1d":"6.44T","hashrate7d":"3.3T","lastshare":1741829464,"workers":1,"shares":1638975459,"bestshare":691603928.27803731,"bestever":691603928,"authorised":1739747080}
[2025-03-12 21:31:12.601] Pool:{"runtime": 1380, "lastupdate": 1741829472, "Users": 1, "Workers": 1, "Idle": 0, "Disconnected": 0}
[2025-03-12 21:31:12.601] Pool:{"hashrate1m": "4.86T", "hashrate5m": "4.82T", "hashrate15m": "4.88T", "hashrate1hr": "14.4T", "hashrate6hr": "13.7T", "hashrate1d": "6T", "hashrate7d": "3.35T"}
[2025-03-12 21:31:12.601] Pool:{"diff": 0.0, "accepted": 2769354187, "rejected": 707625, "bestshare": 1701820452, "SPS1m": 0.293, "SPS5m": 0.298, "SPS15m": 0.337, "SPS1h": 0.413}


***************************
Ckpool config

ckpool@zzy:~/solobtc$ more ckpool.conf
{
"btcd" :  [
        {
                "url" : "127.0.0.1:8332",
                "auth" : "rpc_admin",
                "pass" : "",
                "notify" : true
        }
],
"btcsig" : "/xxxxxxxxxx/"
}

[MagicDude4Eva]

I have the same in my logs for ckpool.log. I think as long as the miner posts a diff, it is fine.

₿ I (81248394) nerdqaxe+: tmp1075 vs tps: 64.19 vs 70.38 (diff: 6.19)
₿ I (81248604) asic_result: Job ID: 20 AsicNr: 0 Ver: 25F5A000 Nonce 843C055C diff 2902.3/3156/66.7M
₿ I (81249894) asic_result: Job ID: 68 AsicNr: 1 Ver: 2361E000 Nonce A188090C diff 5170.9/3156/66.7M
₿ I (81250424) nerdqaxe+: tmp1075 vs tps: 64.12 vs 70.88 (diff: 6.75)
₿ I (81252454) nerdqaxe+: tmp1075 vs tps: 64.19 vs 70.62 (diff: 6.44)
₿ I (81253694) asic_result: Job ID: 28 AsicNr: 1 Ver: 20F16000 Nonce 3247084C diff 4777.4/3156/66.7M
₿ I (81254484) nerdqaxe+: tmp1075 vs tps: 64.19 vs 70.62 (diff: 6.44)
₿ I (81255544) asic_result: Job ID: 70 AsicNr: 3 Ver: 253B6000 Nonce FB4C1880 diff 27468.0/3156/66.7M
₿ I (81256024) asic_result: Job ID: 08 AsicNr: 3 Ver: 25018000 Nonce 80711D08 diff 6064.8/3156/66.7M
₿ I (81256514) nerdqaxe+: tmp1075 vs tps: 64.12 vs 70.62 (diff: 6.50)
₿ I (81257104) asic_result: Job ID: 38 AsicNr: 1 Ver: 26062000 Nonce 3EE10C5E diff 5652.3/3156/66.7M
₿ I (81258544) nerdqaxe+: tmp1075 vs tps: 64.19 vs 70.38 (diff: 6.19)
₿ I (81260274) asic_result: Job ID: 60 AsicNr: 1 Ver: 21FE2000 Nonce 3C900C34 diff 2313.8/3156/66.7M
₿ I (81260574) nerdqaxe+: tmp1075 vs tps: 64.12 vs 70.38 (diff: 6.25)
₿ I (81261304) asic_result: Job ID: 10 AsicNr: 3 Ver: 2260A000 Nonce A4A51BBA diff 3036.8/3156/66.7M
₿ I (81261814) asic_result: Job ID: 28 AsicNr: 2 Ver: 2273A000 Nonce 90481558 diff 11839.5/3156/66.7M
₿ I (81262114) asic_result: Job ID: 28 AsicNr: 2 Ver: 26190000 Nonce A70A150E diff 2463.6/3156/66.7M
₿ I (81262324) InfluxDB: POST: nerdq01 temperature=57.187500,temperature2=64.125000,hashing_speed=5021.010254,invalid_shares=0,valid_shares=0,uptime=81242,best_difficulty=66668392.000000,total_best_difficulty=66668392.000000,pool_errors=0,accepted=29300,not_accepted=43,total_uptime=81242,blocks_found=0,pwr_vin=11.921875,pwr_iin=6.679688,pwr_pin=79.500000,pwr_vout=1.148438,pwr_iout=59.062500,pwr_pout=67.875000,total_blocks_found=0,duplicate_hashes=0

[duckAxe]

I asked a dev about this, his answer:

Your pool HR / network difficulty. Unless we're pumping in P/s then most likely that metric will remain close to zero.
https://github.com/Mecanix-live/ckpool/blob/94526826c62307300e4183beae12669c2262d225/src/stratifier.c#L8254