def fetch_profiles(max_to_fetch = None, just_test_set = False):
    """
        Fetch profile data using Blockstack Core and save the data.
        Data is saved in: data/profile_data.json
        Format of the data is <fqu, profile>
        * fqu: fully-qualified name
        * profile: json profile data
    """

    with open(SEARCH_BLOCKCHAIN_DATA_FILE, 'r') as fin:
        all_names = json.load(fin)

    info_resp = blockstack.lib.client.getinfo(hostport=blockstack_indexer_url)
    last_block_processed = info_resp['last_block_processed']

    all_profiles = []

    if max_to_fetch == None:
        max_to_fetch = len(all_names)

    if just_test_set:
        from api.tests.search_tests import SEARCH_TEST_USERS
        all_names = ["{}.id".format(u) for u in SEARCH_TEST_USERS]

    for ix, fqu in enumerate(all_names):
        if ix % 100 == 0:
            print_status_bar(ix, max_to_fetch)
        if ix >= max_to_fetch:
            break

        resp = {}
        resp['fqu'] = fqu

        try:
            resp['profile'] = blockstack.lib.client.resolve_profile(
                    fqu, hostport=blockstack_indexer_url)['profile']

            all_profiles.append(resp)
        except KeyboardInterrupt as e:
            raise e
        except:
            pass

    attempts = 0
    while not obtain_lockfile():
        attempts += 1
        time.sleep(5)
        if attempts > 10:
            print "ERROR! Could not obtain lockfile"
            return

    last_subdomain_seq = blockstack.lib.subdomains.get_subdomain_last_sequence()

    with open(SEARCH_PROFILE_DATA_FILE, 'w') as fout:
        json.dump(all_profiles, fout)
    with open(SEARCH_LAST_INDEX_DATA_FILE, 'w') as fout:
        search_index_data = {
            'last_block_height' : last_block_processed,
            'last_full_index' : datetime.now().isoformat(),
            'last_subdomain_seq' : last_subdomain_seq
        }
        json.dump(search_index_data, fout)
Fetch profile data using Blockstack Core and save the data.
        Data is saved in: data/profile_data.json
        Format of the data is <fqu, profile>
        * fqu: fully-qualified name
        * profile: json profile data