mark chapter as read :rejected:

[mesmart]

it would be nice to have something like kissmanga or any other manga site when i read a chapter of manga the sign appear so would know i already read that chapter or not
i mean for all manga i read even if they are not in my md list

 

[Plykiya]

@mesmart
We used to track read status on all manga regardless of follow status. The rate at which the rows of data were being generated was going to be unsustainable for the future so we changed it so that it only tracked read status for series marked as "Reading." Even this has proven to be problematic, so we're likely to change the system again in the future.

 

[Burlap]

@Plykiya, could you explain how exactly you are storing that information? Just curious, so only if it isn't too much of a bother.

I don't understand how it could balloon that much. I'd imagine, for any particular chapter, you'd just save a list of users who've read it and call the information when needed. Last I checked Mangadex had around 20,000 works, but even if we assume 100 chapters on average, lists for all of those shouldn't take up that much space, even if it is inelegant.
I'm probably just being dumb and missing some obvious complications here, so it would be great to get an explanation.

 

[Plykiya]

@Burlap

It's just simply one row of data per one chapter per person that decides to follow+read it. We're at over 31 million rows at the moment.
We have about 30,000 manga, 430,000 chapters, and 90,000 users. Assuming 100 chapters on average, that would put it at around 9 million rows.

 

[Burlap]

I meant 100 chapters per work, not per user, to estimate the number of total chapters, since I didn't have that information. Thank you for the numbers.
I suppose the growth rate is the real problem.