def write_bytes(self, rfd, wfd, work):
os.lseek(rfd, work.offset, os.SEEK_SET)
os.lseek(wfd, work.offset, os.SEEK_SET)
m = None
if self.verify:
m = hashlib.sha1()
remaining = work.length
while remaining != 0:
if remaining >= self.blocksize:
self.read_then_write(rfd, wfd, work, self.blocksize, m)
remaining -= self.blocksize
else:
self.read_then_write(rfd, wfd, work, remaining, m)
remaining = 0
if self.verify:
# use src path here
ck = ChunkSum(work.dest, offset=work.offset, length=work.length,
digest=m.hexdigest())
if len(self.chunksums_mem) < G.memitem_threshold:
self.chunksums_mem.append(ck)
else:
self.chunksums_buf.append(ck)
if len(self.chunksums_buf) == G.DB_BUFSIZE:
if self.use_store == False:
self.workdir = os.getcwd()
self.chunksums_dbname = "%s/chunksums.%s" % (G.tempdir, self.circle.rank)
self.chunksums_db = DbStore(dbname=self.chunksums_dbname)
self.use_store = True
self.chunksums_db.mput(self.chunksums_buf)
del self.chunksums_buf[:]
def append_fitem(self, fitem):
"""
if G.use_store:
self.flist_buf.append(fitem)
if len(self.flist_buf) == G.DB_BUFSIZE:
self.flist.mput(self.flist_buf)
del self.flist_buf[:]
else:
self.flist.append(fitem)
"""
if len(self.flist) < G.memitem_threshold:
self.flist.append(fitem)
else:
self.flist_buf.append(fitem)
if len(self.flist_buf) == G.DB_BUFSIZE:
if self.use_store == False:
self.dbname = "%s/fwalk.%s" % (G.tempdir, self.circle.rank)
self.flist_db = DbStore(self.dbname)
self.use_store = True
self.flist_db.mput(self.flist_buf)
del self.flist_buf[:]
def __init__(self, circle, src, dest=None, preserve=False, force=False):
BaseTask.__init__(self, circle)
self.d = {"rank": "rank %s" % circle.rank}
self.circle = circle
self.src = src
self.dest = dest
self.force = force
self.interval = 10 # progress report
# For now, I am setting the option
# TODO: should user allowed to meddle this?
self.sizeonly = False
self.checksum = False
# to be fixed
self.optlist = [] # files
self.opt_dir_list = [] # dirs
self.sym_links = 0
self.follow_sym_links = False
self.workdir = os.getcwd()
self.tempdir = os.path.join(self.workdir, ".pcircle")
if not os.path.exists(self.tempdir):
os.mkdir(self.tempdir)
if G.use_store:
self.dbname = "%s/fwalk.%s" % (self.tempdir, circle.rank)
self.flist = DbStore(self.dbname)
self.flist_buf = []
else:
self.flist = []
self.src_flist = self.flist
# hold unlinkable dest directories
# we have to do the --fix-opt at the end
self.dest_dirs = []
self.cnt_dirs = 0
self.cnt_files = 0
self.cnt_filesize = 0
self.last_cnt = 0
self.skipped = 0
self.last_reduce_time = MPI.Wtime()
# reduce
self.reduce_items = 0
self.time_started = MPI.Wtime()
self.time_ended = None
class FWalk(BaseTask):
def __init__(self, circle, src, dest=None, preserve=False, force=False):
BaseTask.__init__(self, circle)
self.d = {"rank": "rank %s" % circle.rank}
self.circle = circle
self.src = src
self.dest = dest
self.force = force
self.interval = 10 # progress report
# For now, I am setting the option
# TODO: should user allowed to meddle this?
self.sizeonly = False
self.checksum = False
# to be fixed
self.optlist = [] # files
self.opt_dir_list = [] # dirs
self.sym_links = 0
self.follow_sym_links = False
self.workdir = os.getcwd()
self.tempdir = os.path.join(self.workdir, ".pcircle")
if not os.path.exists(self.tempdir):
os.mkdir(self.tempdir)
if G.use_store:
self.dbname = "%s/fwalk.%s" % (self.tempdir, circle.rank)
self.flist = DbStore(self.dbname)
self.flist_buf = []
else:
self.flist = []
self.src_flist = self.flist
# hold unlinkable dest directories
# we have to do the --fix-opt at the end
self.dest_dirs = []
self.cnt_dirs = 0
self.cnt_files = 0
self.cnt_filesize = 0
self.last_cnt = 0
self.skipped = 0
self.last_reduce_time = MPI.Wtime()
# reduce
self.reduce_items = 0
self.time_started = MPI.Wtime()
self.time_ended = None
def create(self):
if self.circle.rank == 0:
for ele in self.src:
self.circle.enq(ele)
print("\nAnalyzing workload ...")
def copy_xattr(self, src, dest):
attrs = xattr.listxattr(src)
for k in attrs:
try:
val = xattr.getxattr(src, k)
xattr.setxattr(dest, k, val)
except IOError as e:
log.warn(e, extra=self.d)
def flushdb(self):
if len(self.flist_buf) != 0:
self.flist.mput(self.flist_buf)
def process_dir(self, fitem, st):
""" i_dir should be absolute path
st is the stat object associated with the directory
"""
i_dir = fitem.path
if self.dest:
# we create destination directory
# but first we check if we need to change mode for it to work
o_dir = destpath(fitem, self.dest)
mode = st.st_mode
if not (st.st_mode & stat.S_IWUSR):
mode = st.st_mode | stat.S_IWUSR
self.opt_dir_list.append((o_dir, st))
try:
os.mkdir(o_dir, mode)
except OSError as e:
log.debug("mkdir(): %s" % e, extra=self.d)
if G.preserve:
self.copy_xattr(i_dir, o_dir)
last_report = MPI.Wtime()
count = 0
try:
entries = scandir(i_dir)
except OSError as e:
log.warn(e, extra=self.d)
self.skipped += 1
else:
for entry in entries:
elefi = FileItem(entry.path)
if fitem.dirname:
elefi.dirname = fitem.dirname
self.circle.enq(elefi)
count += 1
if (MPI.Wtime() - last_report) > self.interval:
print("Rank %s : Scanning [%s] at %s" % (self.circle.rank, i_dir, count))
last_report = MPI.Wtime()
log.info("Finish scan of [%s], count=%s" % (i_dir, count), extra=self.d)
def do_metadata_preserve(self, src_file, dest_file, st):
""" create file node, copy attribute if needed."""
if sys.platform == "darwin": # Mac OS mknod() not permitted
return
try:
mode = st.st_mode
if not (st.st_mode & stat.S_IWUSR):
# owner can't write, we will change mode first
# then put it in optlist to fix
mode = st.st_mode | stat.S_IWUSR
self.optlist.append((dest_file,st))
os.mknod(dest_file, mode) # -r-r-r special
except OSError as e:
log.warn("mknod(): for %s, %s" % (dest_file, e), extra=self.d)
return
if G.preserve:
self.copy_xattr(src_file, dest_file)
def check_dest_exists(self, src_file, dest_file):
""" return True if dest exists and checksum verified correct
return False if (1) no overwrite (2) destination doesn't exist
"""
if not self.force:
return False
if not os.path.exists(dest_file):
return False
# well, destination exists, now we have to check
if self.sizeonly:
if os.path.getsize(src_file) == os.path.getsize(dest_file):
log.warn("Check sizeonly Okay: src: %s, dest=%s" % (src_file, dest_file),
extra=self.d)
return True
elif self.checksum:
raise NotImplementedError("Checksum comparison")
try:
os.unlink(dest_file)
except OSError as e:
log.warn("Can't unlink %s" % dest_file, extra=self.d)
else:
log.info("Retransfer: %s" % src_file, extra=self.d)
return False
def append_fitem(self, fitem):
if G.use_store:
self.flist_buf.append(fitem)
if len(self.flist_buf) == G.DB_BUFSIZE:
self.flist.mput(self.flist_buf)
del self.flist_buf[:]
else:
self.flist.append(fitem)
def process(self):
""" process a work unit, spath, dpath refers to
source and destination respectively """
fitem = self.circle.deq()
spath = fitem.path
if spath:
try:
st = os.lstat(spath)
except OSError as e:
log.warn(e, extra=self.d)
self.skipped += 1
return False
fitem.st_mode, fitem.st_size, fitem.st_uid, fitem.st_gid = st.st_mode, st.st_size, st.st_uid, st.st_gid
self.reduce_items += 1
if os.path.islink(spath):
self.append_fitem(fitem)
self.sym_links += 1
# if not self.follow_sym_links:
# NOT TO FOLLOW SYM LINKS SHOULD BE THE DEFAULT
return
if stat.S_ISREG(st.st_mode):
if not self.dest:
# fwalk without destination, simply add to process list
self.append_fitem(fitem)
else:
# self.dest specified, need to check if it is there
dpath = destpath(fitem, self.dest)
flag = self.check_dest_exists(spath, dpath)
if flag:
return
else:
# if src and dest not the same
# including the case dest is not there
# then we do the following
self.append_fitem(fitem)
self.do_metadata_preserve(spath, dpath, st)
self.cnt_files += 1
self.cnt_filesize += fitem.st_size
elif stat.S_ISDIR(st.st_mode):
self.cnt_dirs += 1
self.process_dir(fitem, st)
# END OF if spath
def tally(self, t):
""" t is a tuple element of flist """
if stat.S_ISDIR(t[1]):
self.cnt_dirs += 1
elif stat.S_ISREG(t[1]):
self.cnt_files += 1
self.cnt_filesize += t[2]
def summarize(self):
map(self.tally, self.flist)
def reduce_init(self, buf):
buf['cnt_files'] = self.cnt_files
buf['cnt_dirs'] = self.cnt_dirs
buf['cnt_filesize'] = self.cnt_filesize
buf['reduce_items'] = self.reduce_items
def reduce(self, buf1, buf2):
buf1['cnt_dirs'] += buf2['cnt_dirs']
buf1['cnt_files'] += buf2['cnt_files']
buf1['cnt_filesize'] += buf2['cnt_filesize']
buf1['reduce_items'] += buf2['reduce_items']
return buf1
def reduce_report(self, buf):
# progress report
# rate = (buf['cnt_files'] - self.last_cnt)/(MPI.Wtime() - self.last_reduce_time)
# print("Processed objects: %s, estimated processing rate: %d/s" % (buf['cnt_files'], rate))
# self.last_cnt = buf['cnt_files']
rate = (buf['reduce_items'] - self.last_cnt) / (MPI.Wtime() - self.last_reduce_time)
print("Processed objects: %s, estimated processing rate: %d/s" % (buf['reduce_items'], rate))
self.last_cnt = buf['reduce_items']
self.last_reduce_time = MPI.Wtime()
def reduce_finish(self, buf):
# get result of reduction
pass
def total_tally(self):
global taskloads
total_dirs = self.circle.comm.reduce(self.cnt_dirs, op=MPI.SUM)
total_files = self.circle.comm.reduce(self.cnt_files, op=MPI.SUM)
total_filesize = self.circle.comm.reduce(self.cnt_filesize, op=MPI.SUM)
total_symlinks = self.circle.comm.reduce(self.sym_links, op=MPI.SUM)
total_skipped = self.circle.comm.reduce(self.skipped, op=MPI.SUM)
taskloads = self.circle.comm.gather(self.reduce_items)
return total_dirs, total_files, total_filesize, total_symlinks, total_skipped
def epilogue(self):
total_dirs, total_files, total_filesize, total_symlinks, total_skipped = self.total_tally()
self.time_ended = MPI.Wtime()
if self.circle.rank == 0:
print("\nFWALK Epilogue:\n")
print("\t{:<20}{:<20}".format("Directory count:", total_dirs))
print("\t{:<20}{:<20}".format("Sym Links count:", total_symlinks))
print("\t{:<20}{:<20}".format("File count:", total_files))
print("\t{:<20}{:<20}".format("Skipped count:", total_skipped))
print("\t{:<20}{:<20}".format("Total file size:", bytes_fmt(total_filesize)))
if total_files != 0:
print("\t{:<20}{:<20}".format("Avg file size:", bytes_fmt(total_filesize/float(total_files))))
print("\t{:<20}{:<20}".format("Tree talk time:", utils.conv_time(self.time_ended - self.time_started)))
print("\tFWALK Loads: %s" % taskloads)
print("")
return total_filesize
def cleanup(self):
if G.use_store:
self.flist.cleanup()
class FCP(BaseTask):
def __init__(self, circle, src, dest,
treewalk=None,
totalsize=0,
hostcnt=0,
prune=False,
verify=False,
resume=False,
workq=None):
BaseTask.__init__(self, circle)
self.circle = circle
self.treewalk = treewalk
self.totalsize = totalsize
self.prune = prune
self.workq = workq
self.resume = resume
self.checkpoint_file = None
self.checkpoint_db = None
self.src = src
self.dest = os.path.abspath(dest)
self.rfd_cache = LRU(oflimit, callback = self.cb_close_fd)
self.wfd_cache = LRU(oflimit, callback = self.cb_close_fd)
self.cnt_filesize_prior = 0
self.cnt_filesize = 0
self.blocksize = 1024 * 1024
self.chunksize = 1024 * 1024
# debug
self.d = {"rank": "rank %s" % circle.rank}
self.wtime_started = MPI.Wtime()
self.wtime_ended = None
self.workcnt = 0 # this is the cnt for the enqued items
self.reduce_items = 0 # this is the cnt for processed items
if self.treewalk:
log.debug("treewalk files = %s" % treewalk.flist, extra=self.d)
# fini_check
self.fini_cnt = Counter()
# verify
self.verify = verify
self.use_store = False
if self.verify:
self.chunksums_mem = []
self.chunksums_buf = []
# checkpointing
self.checkpoint_interval = sys.maxsize
self.checkpoint_last = MPI.Wtime()
if self.circle.rank == 0:
print("Start copying process ...")
def cb_close_fd(self, k, v):
try:
os.close(v)
except:
pass
def set_fixed_chunksize(self, sz):
self.chunksize = sz
def set_adaptive_chunksize(self, totalsz):
self.chunksize = utils.calc_chunksize(totalsz)
if self.circle.rank == 0:
print("Adaptive chunksize: %s" % bytes_fmt(self.chunksize))
def cleanup(self):
self.rfd_cache.clear()
self.wfd_cache.clear()
# remove checkpoint file
if self.checkpoint_file and os.path.exists(self.checkpoint_file):
os.remove(self.checkpoint_file)
if self.checkpoint_db and os.path.exists(self.checkpoint_db):
os.remove(self.checkpoint_db)
# remove provided checkpoint file
if G.resume and G.chk_file and os.path.exists(G.chk_file):
os.remove(G.chk_file)
if G.resume and G.chk_file_db and os.path.exists(G.chk_file_db):
os.remove(G.chk_file_db)
# remove chunksums file
if self.verify:
if hasattr(self, "chunksums_db"):
self.chunksums_db.cleanup()
# we need to do this because if last job didn't finish cleanly
# the fwalk files can be found as leftovers
# and if fcp cleanup has a chance, it should clean up that
"""
fwalk = "%s/fwalk.%s" % (G.tempdir, self.circle.rank)
if os.path.exists(fwalk):
os.remove(fwalk)
"""
def new_fchunk(self, fitem):
fchunk = FileChunk() # default cmd = copy
fchunk.src = fitem.path
fchunk.dest = destpath(fitem, self.dest)
return fchunk
def enq_file(self, fi):
""" Process a single file, represented by "fi" - FileItem
It involves chunking this file and equeue all chunks. """
chunks = fi.st_size // self.chunksize
remaining = fi.st_size % self.chunksize
workcnt = 0
if fi.st_size == 0: # empty file
fchunk = self.new_fchunk(fi)
fchunk.offset = 0
fchunk.length = 0
self.enq(fchunk)
workcnt += 1
else:
for i in range(chunks):
fchunk = self.new_fchunk(fi)
fchunk.offset = i * self.chunksize
fchunk.length = self.chunksize
self.enq(fchunk)
workcnt += chunks
if remaining > 0:
# send remainder
fchunk = self.new_fchunk(fi)
fchunk.offset = chunks * self.chunksize
fchunk.length = remaining
self.enq(fchunk)
workcnt += 1
# save work cnt
self.workcnt += workcnt
log.debug("enq_file(): %s, size = %s, workcnt = %s" % (fi.path, fi.st_size, workcnt),
extra=self.d)
def handle_fitem(self, fi):
if os.path.islink(fi.path):
dest = destpath(fi, self.dest)
linkto = os.readlink(fi.path)
try:
os.symlink(linkto, dest)
except Exception as e:
log.debug("%s, skipping sym link %s" % (e, fi.path), extra=self.d)
elif stat.S_ISREG(fi.st_mode):
self.enq_file(fi) # where chunking takes place
def create(self):
""" Each task has one create(), which is invoked by circle ONCE.
For FCP, each task will handle_fitem() -> enq_file()
to process each file gathered during the treewalk stage. """
if not G.use_store and self.workq: # restart
self.setq(self.workq)
return
if self.resume:
return
# construct and enable all copy operations
# we batch operation hard-coded
log.info("create() starts, flist length = %s" % len(self.treewalk.flist),
extra=self.d)
# flist in memory
if len(self.treewalk.flist) > 0:
for fi in self.treewalk.flist:
self.handle_fitem(fi)
# flist in buf
if len(self.treewalk.flist_buf) > 0:
for fi in self.treewalk.flist_buf:
self.handle_fitem(fi)
# flist in database
if self.treewalk.use_store:
while self.treewalk.flist_db.qsize > 0:
fitems, _ = self.treewalk.flist_db.mget(G.DB_BUFSIZE)
for fi in fitems:
self.handle_fitem(fi)
self.treewalk.flist_db.mdel(G.DB_BUFSIZE)
# both memory and databse checkpoint
if self.checkpoint_file:
self.do_no_interrupt_checkpoint()
self.checkpoint_last = MPI.Wtime()
# gather total_chunks
self.circle.comm.barrier()
G.total_chunks = self.circle.comm.allreduce(self.workcnt, op=MPI.SUM)
#G.total_chunks = self.circle.comm.bcast(G.total_chunks)
#print("Total chunks: ",G.total_chunks)
def do_open2(self, k, d, flag):
""" d is fd cache (either read or write)
open path 'k' with 'flags' """
if d.has_key(k):
return d.get(k)
fd = -1
try:
fd = os.open(k, flag)
except OSError as e:
if e.errno == 28: # no space left
log.error("Critical error: %s, exit!" % e, extra=self.d)
self.circle.exit(0) # should abort
else:
log.error("OSError({0}):{1}, skipping {2}".format(e.errno, e.strerror, k), extra=self.d)
else:
if fd > 0:
d.set(k, fd)
finally:
return fd
@staticmethod
def do_mkdir(work):
dest = work.dest
if not os.path.exists(dest):
os.makedirs(dest)
def do_copy(self, work):
src = work.src
dest = work.dest
basedir = os.path.dirname(dest)
if not os.path.exists(basedir):
os.makedirs(basedir)
rfd = self.do_open2(src, self.rfd_cache, os.O_RDONLY)
if rfd < 0:
return False
wfd = self.do_open2(dest, self.wfd_cache, os.O_WRONLY | os.O_CREAT)
if wfd < 0:
if args.force:
try:
os.unlink(dest)
except OSError as e:
log.error("Failed to unlink %s, %s " % (dest, e), extra=self.d)
return False
else:
wfd = self.do_open2(dest, self.wfd_cache, os.O_WRONLY)
else:
log.error("Failed to create output file %s" % dest, extra=self.d)
return False
# do the actual copy
self.write_bytes(rfd, wfd, work)
# update tally
self.cnt_filesize += work.length
if G.verbosity > 2:
log.debug("Transferred %s bytes from:\n\t [%s] to [%s]" %
(self.cnt_filesize, src, dest), extra=self.d)
return True
def do_no_interrupt_checkpoint(self):
a = Thread(target=self.do_checkpoint)
a.start()
a.join()
if G.verbosity > 0:
print("Checkpoint: %s" % self.checkpoint_file)
def do_checkpoint(self):
tmp_file = self.checkpoint_file + ".part"
with open(tmp_file, "wb") as f:
self.circle.workq.extend(self.circle.workq_buf)
self.circle.workq_buf.clear()
cobj = Checkpoint(self.src, self.dest, self.get_workq(), self.totalsize)
pickle.dump(cobj, f, pickle.HIGHEST_PROTOCOL)
# POSIX requires rename to be atomic
os.rename(tmp_file, self.checkpoint_file)
# copy workq_db database file
if hasattr(self.circle, "workq_db") and len(self.circle.workq_db) > 0:
self.checkpoint_db = self.checkpoint_file + ".db"
if not G.resume:
shutil.copy2(self.circle.dbname, self.checkpoint_db)
else:
# in resume mode, make a copy of current workq db file, which is provided checkpoint db file
self.workdir = os.getcwd()
existingCheckpoint = os.path.join(self.workdir,".pcp_workq.%s.%s.db" % (G.rid, self.circle.rank))
shutil.copy2(existingCheckpoint,self.checkpoint_db)
def process(self):
"""
The only work is "copy"
TODO: clean up other actions such as mkdir/fini_check
"""
if not G.use_store:
curtime = MPI.Wtime()
if curtime - self.checkpoint_last > self.checkpoint_interval:
self.do_no_interrupt_checkpoint()
log.info("Checkpointing done ...", extra=self.d)
self.checkpoint_last = curtime
work = self.deq()
self.reduce_items += 1
if isinstance(work, FileChunk):
self.do_copy(work)
else:
log.warn("Unknown work object: %s" % work, extra=self.d)
err_and_exit("Not a correct workq format")
def reduce_init(self, buf):
buf['cnt_filesize'] = self.cnt_filesize
if sys.platform == 'darwin':
buf['mem_snapshot'] = resource.getrusage(resource.RUSAGE_SELF).ru_maxrss
else:
buf['mem_snapshot'] = resource.getrusage(resource.RUSAGE_SELF).ru_maxrss * 1024
def reduce(self, buf1, buf2):
buf1['cnt_filesize'] += buf2['cnt_filesize']
buf1['mem_snapshot'] += buf2['mem_snapshot']
return buf1
def reduce_report(self, buf):
out = ""
if self.totalsize != 0:
out += "%.2f %% finished, " % (100 * float(buf['cnt_filesize']) // self.totalsize)
out += "%s copied" % bytes_fmt(buf['cnt_filesize'])
if self.circle.reduce_time_interval != 0:
rate = float(buf['cnt_filesize'] - self.cnt_filesize_prior) // self.circle.reduce_time_interval
self.cnt_filesize_prior = buf['cnt_filesize']
out += ", estimated transfer rate: %s/s" % bytes_fmt(rate)
out += ", memory usage: %s" % bytes_fmt(buf['mem_snapshot'])
print(out)
def reduce_finish(self, buf):
# self.reduce_report(buf)
pass
def epilogue(self):
global taskloads
self.wtime_ended = MPI.Wtime()
taskloads = self.circle.comm.gather(self.reduce_items)
if self.circle.rank == 0:
if self.totalsize == 0:
print("\nZero filesize detected, done.\n")
return
tlapse = self.wtime_ended - self.wtime_started
rate = float(self.totalsize) / tlapse
print("\nFCP Epilogue:\n")
print("\t{:<20}{:<20}".format("Ending at:", utils.current_time()))
print("\t{:<20}{:<20}".format("Completed in:", utils.conv_time(tlapse)))
print("\t{:<20}{:<20}".format("Transfer Rate:", "%s/s" % bytes_fmt(rate)))
print("\t{:<20}{:<20}".format("Use store chunksums:", "%s" % self.use_store))
print("\t{:<20}{:<20}".format("Use store workq:", "%s" % self.circle.use_store))
print("\t{:<20}{:<20}".format("FCP Loads:", "%s" % taskloads))
def read_then_write(self, rfd, wfd, work, num_of_bytes, m):
""" core entry point for copy action: first read then write.
@param num_of_bytes: the exact amount of bytes we will copy
@return: False if unsuccessful.
"""
buf = None
try:
buf = readn(rfd, num_of_bytes)
except IOError:
self.logger.error("Failed to read %s", work.src, extra=self.d)
return False
try:
writen(wfd, buf)
except IOError:
self.logger.error("Failed to write %s", work.dest, extra=self.d)
return False
if m:
m.update(buf)
return True
def write_bytes(self, rfd, wfd, work):
os.lseek(rfd, work.offset, os.SEEK_SET)
os.lseek(wfd, work.offset, os.SEEK_SET)
m = None
if self.verify:
m = hashlib.sha1()
remaining = work.length
while remaining != 0:
if remaining >= self.blocksize:
self.read_then_write(rfd, wfd, work, self.blocksize, m)
remaining -= self.blocksize
else:
self.read_then_write(rfd, wfd, work, remaining, m)
remaining = 0
if self.verify:
# use src path here
ck = ChunkSum(work.dest, offset=work.offset, length=work.length,
digest=m.hexdigest())
if len(self.chunksums_mem) < G.memitem_threshold:
self.chunksums_mem.append(ck)
else:
self.chunksums_buf.append(ck)
if len(self.chunksums_buf) == G.DB_BUFSIZE:
if self.use_store == False:
self.workdir = os.getcwd()
self.chunksums_dbname = "%s/chunksums.%s" % (G.tempdir, self.circle.rank)
self.chunksums_db = DbStore(dbname=self.chunksums_dbname)
self.use_store = True
self.chunksums_db.mput(self.chunksums_buf)
del self.chunksums_buf[:]
class FWalk(BaseTask):
def __init__(self, circle, src, dest=None, preserve=False, force=False):
BaseTask.__init__(self, circle)
self.d = {"rank": "rank %s" % circle.rank}
self.circle = circle
self.src = src
self.dest = dest
self.force = force
self.use_store = False
self.interval = 10 # progress report
# For now, I am setting the option
# TODO: should user allowed to meddle this?
self.sizeonly = False
self.checksum = False
# to be fixed
self.optlist = [] # files
self.opt_dir_list = [] # dirs
self.sym_links = 0
self.follow_sym_links = False
self.flist = []
self.flist_buf = []
# hold unlinkable dest directories
# we have to do the --fix-opt at the end
self.dest_dirs = []
self.cnt_dirs = 0
self.cnt_files = 0
self.cnt_filesize = 0
self.last_cnt = 0
self.skipped = 0
self.last_reduce_time = MPI.Wtime()
# reduce
self.reduce_items = 0
self.time_started = MPI.Wtime()
self.time_ended = None
def create(self):
if self.circle.rank == 0:
for ele in self.src:
self.circle.enq(ele)
print("\nAnalyzing workload ...")
def copy_xattr(self, src, dest):
attrs = xattr.listxattr(src)
for k in attrs:
try:
val = xattr.getxattr(src, k)
xattr.setxattr(dest, k, val)
except IOError as e:
log.warn(e, extra=self.d)
def flushdb(self):
if len(self.flist_buf) != 0:
self.flist_db.mput(self.flist_buf)
def process_dir(self, fitem, st):
""" i_dir should be absolute path
st is the stat object associated with the directory
"""
i_dir = fitem.path
if self.dest:
# we create destination directory
# but first we check if we need to change mode for it to work
o_dir = destpath(fitem, self.dest)
mode = st.st_mode
if not (st.st_mode & stat.S_IWUSR):
mode = st.st_mode | stat.S_IWUSR
self.opt_dir_list.append((o_dir, st))
try:
os.mkdir(o_dir, mode)
except OSError as e:
log.debug("mkdir(): %s" % e, extra=self.d)
if G.preserve:
self.copy_xattr(i_dir, o_dir)
last_report = MPI.Wtime()
count = 0
try:
entries = scandir(i_dir)
except OSError as e:
log.warn(e, extra=self.d)
self.skipped += 1
else:
for entry in entries:
elefi = FileItem(entry.path)
if fitem.dirname:
elefi.dirname = fitem.dirname
self.circle.enq(elefi)
count += 1
if (MPI.Wtime() - last_report) > self.interval:
print("Rank %s : Scanning [%s] at %s" %
(self.circle.rank, i_dir, count))
last_report = MPI.Wtime()
log.info("Finish scan of [%s], count=%s" % (i_dir, count),
extra=self.d)
def do_metadata_preserve(self, src_file, dest_file, st):
""" create file node, copy attribute if needed."""
if sys.platform == "darwin": # Mac OS mknod() not permitted
return
try:
mode = st.st_mode
if not (st.st_mode & stat.S_IWUSR):
# owner can't write, we will change mode first
# then put it in optlist to fix
mode = st.st_mode | stat.S_IWUSR
self.optlist.append((dest_file, st))
os.mknod(dest_file, mode) # -r-r-r special
except OSError as e:
log.warn("mknod(): for %s, %s" % (dest_file, e), extra=self.d)
return
if G.preserve:
self.copy_xattr(src_file, dest_file)
def check_dest_exists(self, src_file, dest_file):
""" return True if dest exists and checksum verified correct
return False if (1) no overwrite (2) destination doesn't exist
"""
if not self.force:
return False
if not os.path.exists(dest_file):
return False
# well, destination exists, now we have to check
if self.sizeonly:
if os.path.getsize(src_file) == os.path.getsize(dest_file):
log.warn("Check sizeonly Okay: src: %s, dest=%s" %
(src_file, dest_file),
extra=self.d)
return True
elif self.checksum:
raise NotImplementedError("Checksum comparison")
try:
os.unlink(dest_file)
except OSError as e:
log.warn("Can't unlink %s" % dest_file, extra=self.d)
else:
log.info("Retransfer: %s" % src_file, extra=self.d)
return False
def append_fitem(self, fitem):
"""
if G.use_store:
self.flist_buf.append(fitem)
if len(self.flist_buf) == G.DB_BUFSIZE:
self.flist.mput(self.flist_buf)
del self.flist_buf[:]
else:
self.flist.append(fitem)
"""
if len(self.flist) < G.memitem_threshold:
self.flist.append(fitem)
else:
self.flist_buf.append(fitem)
if len(self.flist_buf) == G.DB_BUFSIZE:
if self.use_store == False:
self.dbname = "%s/fwalk.%s" % (G.tempdir, self.circle.rank)
self.flist_db = DbStore(self.dbname)
self.use_store = True
self.flist_db.mput(self.flist_buf)
del self.flist_buf[:]
def process(self):
""" process a work unit, spath, dpath refers to
source and destination respectively """
fitem = self.circle.deq()
spath = fitem.path
if spath:
try:
st = os.lstat(spath)
except OSError as e:
log.warn(e, extra=self.d)
self.skipped += 1
return False
fitem.st_mode, fitem.st_size, fitem.st_uid, fitem.st_gid = st.st_mode, st.st_size, st.st_uid, st.st_gid
self.reduce_items += 1
if os.path.islink(spath):
self.append_fitem(fitem)
self.sym_links += 1
# if not self.follow_sym_links:
# NOT TO FOLLOW SYM LINKS SHOULD BE THE DEFAULT
return
if stat.S_ISREG(st.st_mode):
if not self.dest:
# fwalk without destination, simply add to process list
self.append_fitem(fitem)
else:
# self.dest specified, need to check if it is there
dpath = destpath(fitem, self.dest)
flag = self.check_dest_exists(spath, dpath)
if flag:
return
else:
# if src and dest not the same
# including the case dest is not there
# then we do the following
self.append_fitem(fitem)
self.do_metadata_preserve(spath, dpath, st)
self.cnt_files += 1
self.cnt_filesize += fitem.st_size
elif stat.S_ISDIR(st.st_mode):
self.cnt_dirs += 1
self.process_dir(fitem, st)
# END OF if spath
def tally(self, t):
""" t is a tuple element of flist """
if stat.S_ISDIR(t[1]):
self.cnt_dirs += 1
elif stat.S_ISREG(t[1]):
self.cnt_files += 1
self.cnt_filesize += t[2]
def summarize(self):
map(self.tally, self.flist)
def reduce_init(self, buf):
buf['cnt_files'] = self.cnt_files
buf['cnt_dirs'] = self.cnt_dirs
buf['cnt_filesize'] = self.cnt_filesize
buf['reduce_items'] = self.reduce_items
def reduce(self, buf1, buf2):
buf1['cnt_dirs'] += buf2['cnt_dirs']
buf1['cnt_files'] += buf2['cnt_files']
buf1['cnt_filesize'] += buf2['cnt_filesize']
buf1['reduce_items'] += buf2['reduce_items']
return buf1
def reduce_report(self, buf):
# progress report
# rate = (buf['cnt_files'] - self.last_cnt)/(MPI.Wtime() - self.last_reduce_time)
# print("Processed objects: %s, estimated processing rate: %d/s" % (buf['cnt_files'], rate))
# self.last_cnt = buf['cnt_files']
rate = (buf['reduce_items'] - self.last_cnt) / (MPI.Wtime() -
self.last_reduce_time)
print("Processed objects: %s, estimated processing rate: %d/s" %
(buf['reduce_items'], rate))
self.last_cnt = buf['reduce_items']
self.last_reduce_time = MPI.Wtime()
def reduce_finish(self, buf):
# get result of reduction
pass
def total_tally(self):
global taskloads
T.total_dirs = self.circle.comm.allreduce(self.cnt_dirs, op=MPI.SUM)
T.total_files = self.circle.comm.allreduce(self.cnt_files, op=MPI.SUM)
T.total_filesize = self.circle.comm.allreduce(self.cnt_filesize,
op=MPI.SUM)
T.total_symlinks = self.circle.comm.allreduce(self.sym_links,
op=MPI.SUM)
T.total_skipped = self.circle.comm.allreduce(self.skipped, op=MPI.SUM)
taskloads = self.circle.comm.gather(self.reduce_items)
def epilogue(self):
self.total_tally()
self.time_ended = MPI.Wtime()
if self.circle.rank == 0:
print("\nFWALK Epilogue:\n")
print("\t{:<20}{:<20}".format("Directory count:", T.total_dirs))
print("\t{:<20}{:<20}".format("Sym Links count:",
T.total_symlinks))
print("\t{:<20}{:<20}".format("File count:", T.total_files))
print("\t{:<20}{:<20}".format("Skipped count:", T.total_skipped))
print("\t{:<20}{:<20}".format("Total file size:",
bytes_fmt(T.total_filesize)))
if T.total_files != 0:
print("\t{:<20}{:<20}".format(
"Avg file size:",
bytes_fmt(T.total_filesize / float(T.total_files))))
print("\t{:<20}{:<20}".format(
"Tree talk time:",
utils.conv_time(self.time_ended - self.time_started)))
print("\t{:<20}{:<20}".format("Use store flist:",
"%s" % self.use_store))
print("\t{:<20}{:<20}".format("Use store workq:",
"%s" % self.circle.use_store))
print("\tFWALK Loads: %s" % taskloads)
print("")
def cleanup(self):
if hasattr(self, "flist_db"):
self.flist_db.cleanup()
