how to maximize block download speed on a single local node - page 2.

I noticed that fetching blocks over the bitcoin protocol is slow in my setting.
My node is in my local network which have over 100MB speed with my dev computer.

I find no way of making it better, and I'd like your advice, here is my finding:

Average Speed Achieved : 5MB/s
Max speed Achieved (ponctual) : 15MB/s
Fetch strategy : getdata of 50 000 blocks, Tip to Genesis
Client's socket receive buffer is never full (indicate bitcoind does not send fast enough)
Disk IO and CPU not capped
When the rcv buffer of the client is empty, it takes 100ms with low variance before new data come
Using 2 connections instead of one for fetching blocks speed things up a little bit (7.5MB/s average)

I tried to play with receive and send buffer on both the bitcoind and the client code, no effect.

I noticed that the 100ms time it take for my buffer to be filled again must come from ThreadMessageHandler.

However by reviewing the code, I have seen no mistake : if the send buffer of the bitcoin node is not full, I should not experience any 100ms delay.
Once again, trying to change the buffers size of bitcoind had no effect.

Any idea ?

My alternative is to parse the blk directory over SMB, which go near 75MB/S.
But this is a fragile solution I'd like to avoid.

Topic: how to maximize block download speed on a single local node - page 2. (Read 2370 times)