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Working toward less aggressive blob and feed fetching.

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git-svn-id: https://www.unprompted.com/svn/projects/tildefriends/trunk@3710 ed5197a5-7fde-0310-b194-c3ffbd925b24
This commit is contained in:
Cory McWilliams 2021-12-28 15:25:04 +00:00
parent 6eed168b7d
commit 2e1e4f90e7
1 changed files with 46 additions and 15 deletions
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61
core/ssb.js
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@ -1,6 +1,8 @@
"use strict";
var g_wants_requests = {};
var g_database = new Database('core');
const k_use_create_history_stream = false;
const k_blobs_concurrent_target = 8;
function following(db, id) {
var o = db.get(id + ":following");
@ -90,9 +92,12 @@ ssb.addEventListener('connections', function(change, connection) {
connection.send_json({"name": ["ebt", "replicate"], "args": [{"version": 3, "format": "classic"}], "type": "duplex"}, ebtReplicateClient);
}
}
connection.active_blob_wants = {};
connection.send_json({'name': ['blobs', 'createWants'], 'type': 'source', 'args': []}, function(message) {
Object.keys(message.message).forEach(function(id) {
if (message.message[id] < 0) {
delete connection.active_blob_wants[id];
var blob = ssb.blobGet(id);
if (blob) {
var out_message = {};
@ -104,12 +109,19 @@ ssb.addEventListener('connections', function(change, connection) {
var expected_bytes = message.message[id];
var buffer = new Uint8Array(expected_bytes);
connection.send_json({'name': ['blobs', 'get'], 'type': 'source', 'args': [id]}, function(message) {
buffer.set(new Uint8Array(message.message, 0, message.message.byteLength), received_bytes);
received_bytes += message.message.byteLength;
if (received_bytes == expected_bytes) {
ssb.blobStore(buffer);
if (message.flags & 0x4 /* end */) {
delete connection.active_blob_wants[id];
} else {
buffer.set(new Uint8Array(message.message, 0, message.message.byteLength), received_bytes);
received_bytes += message.message.byteLength;
if (received_bytes == expected_bytes) {
ssb.blobStore(buffer);
}
}
});
if (Object.keys(connection.active_blob_wants).length < k_blobs_concurrent_target) {
requestMoreBlobs(g_wants_requests[connection.id]);
}
}
});
});
@ -121,18 +133,27 @@ ssb.addEventListener('connections', function(change, connection) {
}
});
function blob_want_discovered(request, id) {
if (Object.keys(request.connection.active_blob_wants).length > k_blobs_concurrent_target) {
return;
}
var message = {};
message[id] = -1;
request.send_json(message);
request.connection.active_blob_wants[id] = true;
}
function requestMoreBlobs(request) {
ssb.sqlStream(
'SELECT id FROM blob_wants LIMIT ' + k_blobs_concurrent_target,
[],
row => blob_want_discovered(request, row.id));
}
ssb.addRpc(['blobs', 'createWants'], function(request) {
g_wants_requests[request.connection.id] = request;
function blob_want_discovered(id) {
var message = {};
message[id] = -1;
request.send_json(message);
}
ssb.addEventListener('blob_want_added', blob_want_discovered);
ssb.sqlStream(
'SELECT id FROM blob_wants',
[],
row => blob_want_discovered(row.id));
ssb.addEventListener('blob_want_added', id => blob_want_discovered(request, id));
requestMoreBlobs(request);
});
ssb.addRpc(['blobs', 'has'], function(request) {
@ -166,10 +187,16 @@ ssb.addRpc(['tunnel', 'isRoom'], function(request) {
function ebtReplicateSendClock(request, have) {
var me = ssb.whoami();
var message = {};
var ids = followingDeep(g_database, [me], 2).concat([request.connection.id]).concat(Object.keys(have));
var ids = followingDeep(g_database, [me], 2).concat([request.connection.id]);
for (let id of ids) {
message[id] = get_latest_sequence_for_author(id);
}
for (let id of Object.keys(have)) {
if (message[id] === undefined) {
var sequence = get_latest_sequence_for_author(id);
message[id] = sequence ? sequence : -1;
}
}
var last_sent = request.connection.sent_clock || {};
var to_send = {}
@ -177,6 +204,10 @@ function ebtReplicateSendClock(request, have) {
if (last_sent[id] === undefined || message[id] > last_sent[id]) {
last_sent[id] = to_send[id] = message[id] === -1 ? -1 : message[id] << 1;
}
if (Object.keys(to_send).length >= 32) {
request.send_json(to_send);
to_send = {};
}
}
request.connection.sent_clock = last_sent;