3 ms·
Do you think that blockchain engineers are incapable of developing high throughout distributed systems due to engineering incapacity or due to real limits to ho
by westurner 2y ago
Do you think that blockchain engineers are incapable of developing high throughout distributed systems due to engineering incapacity or due to real limits to how fast a strongly consistent, sufficiently secured cryptographic distributed system can be? Are blockchain devs all just idiots, or have they dumbly prioritized data integrity because that doesn't matter it's about big data these days, nobody needs CAP?
From "Rediscovering Transaction Processing from History and First Principles" https://news.ycombinator.com/item?id=41064634 https://news.ycombinator.com/item?id=41064634 :
> metrics: Real-Time TPS (tx/s), Max Recorded TPS (tx/s), Max Theoretical TPS (tx/s), Block Time (s), Finality (s)
> Other metrics: FLOPS, FLOPS/WHr, TOPS, TOPS/WHr, $/OPS/WHr
TB/s in query processing of data already in RAM?
/? TB/s "hnlog"
- https://news.ycombinator.com/item?id=40423020 https://news.ycombinator.com/item?id=40423020 , [...] :
> The HBM3E Wikipedia article says 1.2TB/s.
> Latest PCIe 7 x16 says 512 GB/s:
fiber optics: 301 TB/s (2024-05)
Cerebras:
https://en.wikipedia.org/wiki/Cerebras https://en.wikipedia.org/wiki/Cerebras :
WSE-2 on-chip SRAM memory bandwidth: 20 PB/s / 220 PB/S
WSE-3: 21 PB/S
HBM > Technology:
https://en.wikipedia.org/wiki/High_Bandwidth_Memory#Technology https://en.wikipedia.org/wiki/High_Bandwidth_Memory#Technolo... :
HBM3E: 9.8 Gbit/s , 1229 Gbyte/s (2023)
HBM4: 6.4 Gbit/s , 1638 Gbyte/s (2026)
LPDDR SDRAM > Generations:
https://en.wikipedia.org/wiki/LPDDR#Generations https://en.wikipedia.org/wiki/LPDDR#Generations :
LPDDR5X: 1,066.63 MB/S (2021)
GDDR7: https://en.m.wikipedia.org/wiki/GDDR7_SDRAM https://en.m.wikipedia.org/wiki/GDDR7_SDRAM
GDDR7: 32 Gbps/pin - 48 Gbps/pin,[11] and chip capacities up to 64 Gbit, 192 GB/s
List of interface bit rates:
https://en.wikipedia.org/wiki/List_of_interface_bit_rates https://en.wikipedia.org/wiki/List_of_interface_bit_rates :
PCIe7 x16: 1.936 Tbit/s 242 GB/s (2025)
800GBASE-X: 800 Gbps (2024)
DDR5-8800: 70.4 GB/s
Bit rate >
In data communications: https://en.wikipedia.org/wiki/Bit_rate# https://en.wikipedia.org/wiki/Bit_rate#
In_data_communications ; Gross and Net bit rate, Information rate, Network throughout, Goodput
Re: TPUs, NPUs, TOPS:
https://news.ycombinator.com/item?id=42318274 https://news.ycombinator.com/item?id=42318274 :
> How many TOPS/W and TFLOPS/W? (T [Float] Operations Per Second per Watt (hour ?))*
Top 500 > Green 500:
https://www.top500.org/lists/green500/2024/11/ https://www.top500.org/lists/green500/2024/11/ :
PFlop/s (Rmax)
Power (kW)
GFlops/watts (Energy Efficiency)
Performance per watt > FLOPS/watts:
https://en.wikipedia.org/wiki/Performance_per_watt#FLOPS_per_watt https://en.wikipedia.org/wiki/Performance_per_watt#FLOPS_per...
Electrons: 50%–99% of c the speed of light ( Speed of electricity: https://en.wikipedia.org/wiki/Speed_of_electricity https://en.wikipedia.org/wiki/Speed_of_electricity , Velocity factor of a CAT-7 cable:
https://en.wikipedia.org/wiki/Velocity_factor#Typical_velocity_factors https://en.wikipedia.org/wiki/Velocity_factor#Typical_veloci... )
Photons: c (*)
Gravitational Waves: Even though both light and gravitational waves were generated by this event, and they both travel at the same speed, the gravitational waves stopped arriving 1.7 seconds before the first light was seen ( https://bigthink.com/starts-with-a-bang/light-gravitational-waves-arrive/ https://bigthink.com/starts-with-a-bang/light-gravitational-... )
But people don't do computation with gravitational waves.
- lmeyerov 2y agoTo a reasonable rounding error.. yes