import os, time from zope.interface import implements from twisted.application import service from twisted.internet import defer from twisted.internet.interfaces import IConsumer from foolscap.api import Referenceable from allmydata.interfaces import RIControlClient, IFileNode from allmydata.util import fileutil, mathutil from allmydata.immutable import upload from twisted.python import log def get_memory_usage(): # this is obviously linux-specific stat_names = ("VmPeak", "VmSize", #"VmHWM", "VmData") stats = {} try: for line in open("/proc/self/status", "r").readlines(): name, right = line.split(":",2) if name in stat_names: assert right.endswith(" kB\n") right = right[:-4] stats[name] = int(right) * 1024 except: # Probably not on (a compatible version of) Linux stats['VmSize'] = 0 stats['VmPeak'] = 0 return stats def log_memory_usage(where=""): stats = get_memory_usage() log.msg("VmSize: %9d VmPeak: %9d %s" % (stats["VmSize"], stats["VmPeak"], where)) class FileWritingConsumer: implements(IConsumer) def __init__(self, filename): self.done = False self.f = open(filename, "wb") def registerProducer(self, p, streaming): if streaming: p.resumeProducing() else: while not self.done: p.resumeProducing() def write(self, data): self.f.write(data) def unregisterProducer(self): self.done = True self.f.close() class ControlServer(Referenceable, service.Service): implements(RIControlClient) def remote_wait_for_client_connections(self, num_clients): return self.parent.debug_wait_for_client_connections(num_clients) def remote_upload_from_file_to_uri(self, filename, convergence): uploader = self.parent.getServiceNamed("uploader") u = upload.FileName(filename, convergence=convergence) d = uploader.upload(u) d.addCallback(lambda results: results.uri) return d def remote_download_from_uri_to_file(self, uri, filename): filenode = self.parent.create_node_from_uri(uri, name=filename) if not IFileNode.providedBy(filenode): raise AssertionError("The URI does not reference a file.") c = FileWritingConsumer(filename) d = filenode.read(c) d.addCallback(lambda res: filename) return d def remote_speed_test(self, count, size, mutable): assert size > 8 log.msg("speed_test: count=%d, size=%d, mutable=%s" % (count, size, mutable)) st = SpeedTest(self.parent, count, size, mutable) return st.run() def remote_get_memory_usage(self): return get_memory_usage() def remote_measure_peer_response_time(self): # I'd like to average together several pings, but I don't want this # phase to take more than 10 seconds. Expect worst-case latency to be # 300ms. results = {} sb = self.parent.get_storage_broker() everyone = sb.get_connected_servers() num_pings = int(mathutil.div_ceil(10, (len(everyone) * 0.3))) everyone = list(everyone) * num_pings d = self._do_one_ping(None, everyone, results) return d def _do_one_ping(self, res, everyone_left, results): if not everyone_left: return results server = everyone_left.pop(0) server_name = server.longname() connection = server.get_rref() start = time.time() d = connection.callRemote("get_buckets", "\x00"*16) def _done(ignored): stop = time.time() elapsed = stop - start if server_name in results: results[server_name].append(elapsed) else: results[server_name] = [elapsed] d.addCallback(_done) d.addCallback(self._do_one_ping, everyone_left, results) def _average(res): averaged = {} for server_name,times in results.iteritems(): averaged[server_name] = sum(times) / len(times) return averaged d.addCallback(_average) return d class SpeedTest: def __init__(self, parent, count, size, mutable): self.parent = parent self.count = count self.size = size self.mutable_mode = mutable self.uris = {} self.basedir = os.path.join(self.parent.basedir, "_speed_test_data") def run(self): self.create_data() d = self.do_upload() d.addCallback(lambda res: self.do_download()) d.addBoth(self.do_cleanup) d.addCallback(lambda res: (self.upload_time, self.download_time)) return d def create_data(self): fileutil.make_dirs(self.basedir) for i in range(self.count): s = self.size fn = os.path.join(self.basedir, str(i)) if os.path.exists(fn): os.unlink(fn) f = open(fn, "w") f.write(os.urandom(8)) s -= 8 while s > 0: chunk = min(s, 4096) f.write("\x00" * chunk) s -= chunk f.close() def do_upload(self): d = defer.succeed(None) def _create_slot(res): d1 = self.parent.create_mutable_file("") def _created(n): self._n = n d1.addCallback(_created) return d1 if self.mutable_mode == "upload": d.addCallback(_create_slot) def _start(res): self._start = time.time() d.addCallback(_start) def _record_uri(uri, i): self.uris[i] = uri def _upload_one_file(ignored, i): if i >= self.count: return fn = os.path.join(self.basedir, str(i)) if self.mutable_mode == "create": data = open(fn,"rb").read() d1 = self.parent.create_mutable_file(data) d1.addCallback(lambda n: n.get_uri()) elif self.mutable_mode == "upload": data = open(fn,"rb").read() d1 = self._n.overwrite(data) d1.addCallback(lambda res: self._n.get_uri()) else: up = upload.FileName(fn, convergence=None) d1 = self.parent.upload(up) d1.addCallback(lambda results: results.uri) d1.addCallback(_record_uri, i) d1.addCallback(_upload_one_file, i+1) return d1 d.addCallback(_upload_one_file, 0) def _upload_done(ignored): stop = time.time() self.upload_time = stop - self._start d.addCallback(_upload_done) return d def do_download(self): start = time.time() d = defer.succeed(None) def _download_one_file(ignored, i): if i >= self.count: return n = self.parent.create_node_from_uri(self.uris[i]) if not IFileNode.providedBy(n): raise AssertionError("The URI does not reference a file.") if n.is_mutable(): d1 = n.download_best_version() else: d1 = n.read(DiscardingConsumer()) d1.addCallback(_download_one_file, i+1) return d1 d.addCallback(_download_one_file, 0) def _download_done(ignored): stop = time.time() self.download_time = stop - start d.addCallback(_download_done) return d def do_cleanup(self, res): for i in range(self.count): fn = os.path.join(self.basedir, str(i)) os.unlink(fn) return res class DiscardingConsumer: implements(IConsumer) def __init__(self): self.done = False def registerProducer(self, p, streaming): if streaming: p.resumeProducing() else: while not self.done: p.resumeProducing() def write(self, data): pass def unregisterProducer(self): self.done = True