使用libtorrent（Python）下载许多种子

Question

我使用libtorrent（python）下载许多种子（大约1500-从100mb到几个gb）。 我尝试了其他设置，但在24小时内无法下载4-5以上的文件。

这些任务可能有特殊设置吗？

这是代码的最新版本：

设置会话：

async def lt_session(app):
    ses = app['lt_session'] = lt.session({
        'active_downloads': 50,
    })
    ses.listen_on(6881, 6881)
    ses.add_extension('ut_metadata')
    ses.add_extension('smart_ban')
    ses.add_extension('ut_pex')
    ses.add_extension('metadata_transfer')
    ses.start_dht()
    ses.start_lsd()
    app['torrents'] = {}

开始下载：

async def ensure_downloads_loop(app):
    while True:
        await asyncio.sleep(300)
        try:
            await ensure_downloads(app)
        except:
            pass

async def ensure_downloads(app):
    pool = app['db_pool'][xxx]
    sql = "SELECT post_id FROM xxx WHERE status IN ('new', 'downloading') order by id ASC;"
    async with pool.acquire() as conn:
        async with conn.cursor(DictCursor) as cur:
            await cur.execute(sql)
            items = await cur.fetchall()
    result = {
        'downloading': 0,
        'downloaded': 0,
    }
    for item in items:
        id = item['post_id']
        handle = app['torrents'].get(id)
        if handle is None:
            handle = await run_download(app, id)
        done = handle.status().state == lt.torrent_status.seeding
        if not done:
            result['downloading'] += 1
            continue

        pool = app['db_pool'][xxx]
        sql = '''
            UPDATE xxx
            SET status = 'downloaded'
            WHERE post_id = {id};
        '''.format(id=id)
        async with pool.acquire() as conn:
            async with conn.cursor(DictCursor) as cur:
                await cur.execute(sql)
                await conn.commit()
        if handle:
            app['lt_session'].remove_torrent(handle)
            del app['torrents'][id]
        await check_post_is_done(app, id)
        result['downloaded'] += 1
    return result

开始下载torrent：

async def run_download(app, id):
    id = int(id)
    pool = app['db_pool'][xxx]
    sql = 'SELECT * FROM xxx WHERE id = %d;' % id
    async with pool.acquire() as conn:
        async with conn.cursor(DictCursor) as cur:
            await cur.execute(sql)
            item = await cur.fetchone()
    ses = app['lt_session']
    path = os.path.join(DOWNLOADS, str(id))
    if not os.path.exists(path):
        os.makedirs(path)
    params = {'save_path': path}
    handle = lt.add_magnet_uri(ses, item['magnet'], params)
    handle.set_download_limit(-1)
    handle.set_upload_limit(10000)
    app['torrents'][id] = handle
    return handle