So there is no way to build an own backend not relying on memory at all? I thought, since you can read through using mmap, you should also be abe to write through. Ok, not directly to files what might be because of fragmentation but in redis you could allocate the segments in the same independant way as with malloc. Just having each segment having its own key.
BR Ralph Am Mittwoch, 28. November 2018 22:13:53 UTC+1 schrieb Kenton Varda: > > Hi Ralph, > > A capnp::word is just an aligned 8-byte value. ArrayPtr<word> is a pointer > to a raw data buffer. The reason we use ArrayPtr<word> instead of > ArrayPtr<byte> is to show that the buffer is aligned on an 8-byte boundary > and its size is a multiple of 8 bytes. > > You can do `array.asBytes()` to convert any ArrayPtr<T> to ArrayPtr<byte>. > Use `array.begin()` to get a pointer to the beginning of the buffer and > `array.size()` to get the number of elements in the array. > > -Kenton > > On Wed, Nov 28, 2018 at 12:34 PM <[email protected] <javascript:>> wrote: > >> Hi, >> >> Since the level 4 thing takes a few thoughts, first I want to simulate >> such an object cloud using redis. >> Means I want to, if I understood correctly write a messagebuilder backing >> the segments using redis strings of a certain key. I'd prefer a write >> through mechanism. >> >> I see the MessageBuilder allocates segments of some memory referenced by >> the type ArrayPtr<word> where word "represents" a byte in some yet unknown >> way. >> This part I don't get yet. What is behind kj::ArrayPtr and how could I >> utilize that to at least sync the memory with redis, better directly write >> and read through without allocating local memory at all. >> >> BR >> Ralph >> >> -- >> You received this message because you are subscribed to the Google Groups >> "Cap'n Proto" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected] <javascript:>. >> Visit this group at https://groups.google.com/group/capnproto. >> > -- You received this message because you are subscribed to the Google Groups "Cap'n Proto" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. Visit this group at https://groups.google.com/group/capnproto.
