spacewander commented on issue #4209:
URL: https://github.com/apache/apisix/issues/4209#issuecomment-840944149


   > 
   > 
   > the first bit should stay at 0 and actually only use 63bit
   > 
   > Sonyflake definition
   > 
   > ```
   > 39 bits for time in units of 10 msec
   > 8 bits for a sequence number
   > 16 bits for a machine id
   > ```
   > 
   > You might need to fetch 2 bits to do a dial back, to deal with the time 
callback problem
   > 
   > ```
   > 39 bits for time in units of 10 msec
   > 8 bits for a sequence number
   > 2 bits for back to dial
   > 14 bits for a machine id
   > ```
   > 
   > The start_time is designed to be configurable
   
   10 bits for 10 msec is not enough as I proved. Maybe it is faster to change 
lua-snowflake to support this (only need to change some constants).


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