John, is this question still actual? пт, 22 июн. 2018 г. в 15:18, Dmitry Pavlov <dpavlov....@gmail.com>:
> Hi Ed, > > Which Sergey do you mean? I know a number of contributors. > > Sincerely, > > > вт, 19 июн. 2018 г. в 22:15, Eduard Shangareev < > eduard.shangar...@gmail.com>: > >> Hi, >> >> 1. It looks weird, yeah. Need to ask Sergey, who has changed it last time. >> >> 2. Because we could reuse memory. For example, after cache destroy or >> something like that. >> >> On Tue, Jun 19, 2018 at 9:58 PM, John Wilson <sami.hailu...@gmail.com> >> wrote: >> >> > Hi, >> > >> > Two quick questions: >> > >> > >> > 1. The design documentation here, >> > https://cwiki.apache.org/confluence/display/IGNITE/ >> > Ignite+Durable+Memory+-+under+the+hood, >> > states that the default segment count is equal to the number of >> logical >> > cores available in the underlying machine. However, the segments >> array >> > in >> > PageMemory indicates that the maximum number of segments is: 1 << >> > SEG_BITS. >> > Since SEG_BITS = 4, the max # segments is 16. Did I miss something >> here? >> > 2. Reading the code in PageMemoryNoStoreImp, it looks like pages are >> > allocated segment sequentially in a bump-the-pointer strategy where >> the >> > first 8 bytes of a segment hold a pointer to the index of the last >> > allocated page. If this is true, then I don't understand the point of >> > having a page map buckets. Why not use a simple arithmetic index * >> > pageSize >> > to get the offset of a page? >> > >> > Thanks. >> > John >> > >> >
