Follow up questions to disk usage by streams

+2 votes
Thank you for your reply. I'm new to this and I'm not sure I fully understand, so please forgive my naive follow up questions.
I currently have only the seed node on a server and three additional small devices, each with a node. I've observed that even when a device is not actively publishing, the disk usage in the /home/user/.multichain/chain-name/wallet folder continues to grow. Is the device receiving the publishings of the other two devices? If so, do the calculations above require a multiplier of the number of nodes in the chain?
For item #3 in your reply, does each publication to a stream consume a block?
Is the information in the blockchain compressed in any way?
I'm thinking that if there is no compression, each publication to the stream uses a block and all nodes receive all publications from all other nodes, then in my original scenario of 10,000 noded publising 4 times every 15 seconds, in a single hour the disk usage per node would be 10,000 nodes x 4 publications x 4 time a minute x 60 minutes x (2048 byte block overhead + 200  transaction overhead + 400 transaction payload) = approx 25Gb.
Please tell me I'm grossly misunderstanding this scenario, as the devices would exhaust their respective capacities in less than an hour by my calculations.
asked Mar 20, 2018 by Ed

1 Answer

0 votes
Yes, every blockchain node stores all data published on the chain, by design.

If you're not looking for this pattern, then probably you don't need a blockchain, but rather a central server that accepts digitally signed transactions from each of the individual devices.

What value are you hoping the blockchain will add over this type of architecture?
answered Mar 20, 2018 by MultiChain
Thank you. It does appear that blockchain is not the appropriate approach to my needs.