I am having a look to the flat file format, and I would like to understand what is stored in column number 8:

2018-01-02 03:28:05.874 2677.75 2 53813 2677.75 2678.00 2710183 0 0 C CMEMINI 01 REGULAR
2018-01-02 03:28:05.874 2677.75 1 53814 2677.75 2678.00 2710183 0 0 C CMEMINI 01 REGULAR
2018-01-02 03:28:05.874 2677.75 1 53815 2677.75 2678.00 2710183 0 0 C CMEMINI 01 REGULAR
2018-01-02 03:28:05.874 2677.75 1 53816 2677.75 2678.00 2710183 0 0 C CMEMINI 01 REGULAR


So in the above excerpt, what does value 2710183 mean?

me78 

So in the above excerpt, what does value 2710183 mean?

Not certain, but it's probably open interest.