hi all, I was reading the malamut white paper about the matching engine, and I am trying to understand what I miss in using an inverted bitmap index to match consumers subscriptions. I tried to look at the source code but it seems that zbits is not used right now.
>From what I understand, bitmaps key are the subscription fields with their value (ex. `market=forex`) and the bitmap allows to match the subscriptions (each subscription item is a bit set to 1 for a field). If I read the given example, the size of the bitmap equals to the number of subscriptions. My question is, what happen when a subscription is closed? Are all the bitmaps for the fields recalculated ? Or just the bit removed for all the fields of the subscription? Is the bitmap size dynamic? Or did I miss something? In that case is this designed for the case where we can have a lot of subscription created and removed over the time? - benoît
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