Release/performance 2.8 #656
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Co-authored-by: Lev Berman <ldmberman@proton.me>
Initialize poa caches for initial block cache blocks
This commit adds the packing difficulty in `v2_index_data_size_by_packing` metric. see: ArweaveTeam/arweave-dev#568
This gives a truer estimate of the miner's expected read performance
This fixes an issue where read performance was severely degradeed when multiple storage modules were stored on a single disk. This was particularly bad for SATA, although was noticeable on SAS disks as well.
Only current (active) peers should be able to receive the chunks, others will generate unnecessary timeouts. In fact using the active peers from the last 24 hours can also be a great solution if we assume a peer seen during the last 24 hours will probably be come back quick. When chunks are propagated across the network, the to be acknowledged are the trusted peer. On the previous version, the trusted peer where put at the end of the list. Cleaned up ar_tx_emitter_sup, converting old tuple to map. Refacto and added comments and documentation. see: ArweaveTeam/arweave-dev#720
When a server has the full transaction locally, and uses spinning disk, the amount of requests from other nodes is too high, and leads to a bottleneck on rocksdb database. This commit adds a semaphore to control the amount of requests on `ar_http_iface_middleware:handle_get_tx/3` function, to avoid a node to be overflooded by requests.
For the first ~2 months after the 2.8 HF activation nodes may have less than the required 3 months of reward history. This is okay.
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