grpc pagination: sync channel

[qian...@gmail.com]

Hi Grpc exports,

We have a client-server project, where client (C++) needs to send a lot of data to server every a few seconds. Often there are 60000 records ready to be sent to server per round , each record about 400-byte.  So we decide to do pagination (chunking):  1 page has  1000 records.  MY question is:

    1.how to do paging, without close/open stream channel every time
        it seems after writer->WritesDoen() and Finish(), the channel is closed, so I have to reopen the same channel immediately for the 2nd page.  But If I don't call writer->WritesDone and Finish(), this page is not sent. I really want send every page with the same writer, and not close the channel in between.

2. keep the channel open forever:
   Since the client is sending data as long as it is alive, to the same server/port, is there a way to keep the sync channel open for sending, for as long as the client process is alive, maybe for a few days/months...  
   
   
   thanks!
   Qian

[David Garcia Quintas]

Why not using a streaming call? Your usecase would fit perfectly with its semantics. Have a look at the relevant sections of the guide.