def create_connections(self, channel_repository):
"""Create connections to data server which has file contents.
In this function, send request for open to data server.
(and calculate RTT)
"""
channels = channel_repository.get_channel(self.dest)
self.d_channel = Channel.MogamiChanneltoData(self.dest)
# create a connection for prefetching
#self.p_channel = Channel.MogamiChanneltoData(self.dest)
#channel_repository.set_channel(self.dest, self.d_channel, self.p_channel)
#else:
# set channels
# self.d_channel = channels[0]
# self.p_channel = channels[1]
# send a request to data server for open
start_t = time.time()
(ans, self.datafd,
open_t) = self.d_channel.open_req(self.data_path, self.flag,
*self.mode)
end_t = time.time()
if ans != 0: # failed...with errno
self.finalize()
return ans
# on success
self.rtt = end_t - start_t - open_t
# must be 0
return ans
def truncate(self, path, length):
MogamiLog.debug('** truncate ** path = %s, length = %d' %
(path, length))
(ans, dest, filename) = m_channel.truncate_req(path, length)
if ans != 0:
return -ans
c_channel = Channel.MogamiChanneltoData(dest)
ans = c_channel.truncate_req(filename, length)
c_channel.finalize()
# if truncate was succeeded, cache of file size should be changed
if ans == 0:
file_size_dict[path] = length
return -ans
def send_delete_request(self, ip, files):
c_channel = Channel.MogamiChanneltoData(ip)
ans = c_channel.delfile_req(files)
c_channel.close_req()
c_channel.finalize()