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|
# ----------------------------------------------------------------------
# MR-MPI = MapReduce-MPI library
# http://www.cs.sandia.gov/~sjplimp/mapreduce.html
# Steve Plimpton, sjplimp@sandia.gov, Sandia National Laboratories
#
# Copyright (2009) Sandia Corporation. Under the terms of Contract
# DE-AC04-94AL85000 with Sandia Corporation, the U.S. Government retains
# certain rights in this software. This software is distributed under
# the modified Berkeley Software Distribution (BSD) License.
#
# See the README file in the top-level MapReduce directory.
# -------------------------------------------------------------------------
# Python wrapper on MapReduce-MPI library via ctypes
import types
from ctypes import *
from cPickle import dumps,loads
class mrmpi:
def __init__(self,comm=None,name=""):
# load libmrmpi.so by default
# if name = "g++", load libmrmpi_g++.so
try:
if not name: self.lib = CDLL("libmrmpi.so")
else: self.lib = CDLL("libmrmpi_%s.so" % name)
except:
import sys,traceback
type,value,tb = sys.exc_info()
traceback.print_exception(type,value,tb)
raise OSError,"Could not load MR-MPI dynamic library"
# create an instance of MR-MPI
if comm == None: self.mr = self.lib.MR_create_mpi()
elif type(comm) == types.IntType: self.mr = self.lib.MR_create(comm)
elif type(comm) == types.FloatType:
self.mr = self.lib.MR_create_mpi_finalize()
else: raise StandardError,"Could not create an MR-MPI library instance"
# hardwire keyalign and valuealign to 1 because of pickling
self.lib.MR_set_keyalign(self.mr,1)
self.lib.MR_set_valuealign(self.mr,1)
# setup callbacks
self.lib.MR_create.restype = c_void_p
self.lib.MR_copy.restype = c_void_p
COMPAREFUNC = CFUNCTYPE(c_void_p,POINTER(c_char),c_int,
POINTER(c_char),c_int)
self.compare_def = COMPAREFUNC(self.compare_callback)
COMPRESSFUNC = CFUNCTYPE(c_void_p,POINTER(c_char),c_int,
POINTER(c_char),c_int,POINTER(c_int),
c_void_p,c_void_p)
self.compress_def = COMPRESSFUNC(self.compress_callback)
HASHFUNC = CFUNCTYPE(c_void_p,POINTER(c_char),c_int)
self.hash_def = HASHFUNC(self.hash_callback)
MAPFUNC = CFUNCTYPE(c_void_p,c_int,c_void_p,c_void_p)
self.map_def = MAPFUNC(self.map_callback)
MAP_FILE_FUNC = CFUNCTYPE(c_void_p,c_int,c_char_p,c_void_p,c_void_p)
self.map_file_def = MAP_FILE_FUNC(self.map_file_callback)
MAP_STR_FUNC = CFUNCTYPE(c_void_p,c_int,POINTER(c_char),c_int,
c_void_p,c_void_p)
self.map_str_def = MAP_STR_FUNC(self.map_str_callback)
MAP_MR_FUNC = CFUNCTYPE(c_void_p,c_int,POINTER(c_char),c_int,
POINTER(c_char),c_int,c_void_p,c_void_p)
self.map_mr_def = MAP_MR_FUNC(self.map_mr_callback)
REDUCEFUNC = CFUNCTYPE(c_void_p,POINTER(c_char),c_int,
POINTER(c_char),c_int,POINTER(c_int),
c_void_p,c_void_p)
self.reduce_def = REDUCEFUNC(self.reduce_callback)
SCANKVFUNC = CFUNCTYPE(c_void_p,POINTER(c_char),c_int,
POINTER(c_char),c_int,c_void_p)
self.scankv_def = SCANKVFUNC(self.scankv_callback)
SCANKMVFUNC = CFUNCTYPE(c_void_p,POINTER(c_char),c_int,
POINTER(c_char),c_int,POINTER(c_int),c_void_p)
self.scankmv_def = SCANKMVFUNC(self.scankmv_callback)
def __del__(self):
if self.mr: self.lib.MR_destroy(self.mr)
def destroy(self):
self.lib.MR_destroy(self.mr)
self.mr = None
def copy(self,mr):
cmr = self.lib.MR_copy(self.mr,mr.mr)
pymr = mrmpi()
self.lib.MR_destroy(pymr.mr)
pymr.mr = cmr
return pymr
def add(self,mr):
n = self.lib.MR_add(self.mr,mr.mr)
return n
def aggregate(self,hash=None):
if hash:
self.hash_caller = hash
n = self.lib.MR_aggregate(self.mr,self.hash_def)
else:
n = self.lib.MR_aggregate(self.mr,None)
return n
def broadcast(self,root):
n = self.lib.MR_broadcast(self.mr,root)
return n
def clone(self):
n = self.lib.MR_clone(self.mr)
return n
def close(self):
n = self.lib.MR_close(self.mr)
return n
def collapse(self,key):
ckey = dumps(key,1)
n = self.lib.MR_collapse(self.mr,ckey,len(ckey))
return n
def collate(self,hash=None):
if hash:
self.hash_caller = hash
n = self.lib.MR_collate(self.mr,self.hash_def)
else:
n = self.lib.MR_collate(self.mr,None)
return n
def compress(self,commpress,ptr=None):
self.compress_caller = compress
self.compress_argcount = compress.func_code.co_argcount
self.compress_ptr = ptr
n = self.lib.MR_compress(self.mr,self.compress_def,None)
return n
def compress_callback(self,ckey,keybytes,multivalue,nvalues,valuesizes,
kv,dummy):
self.kv = kv
key = loads(ckey[:keybytes])
mvalue = []
start = 0
for i in xrange(nvalues):
stop = start + valuesizes[i]
value = loads(multivalue[start:stop])
mvalue.append(value)
start = stop
if self.compress_argcount == 3: self.compress_caller(key,mvalue,self)
else: self.compress_caller(key,mvalue,self,self.compress_ptr)
def convert(self):
n = self.lib.MR_convert(self.mr)
return n
def gather(self,nprocs):
n = self.lib.MR_gather(self.mr,nprocs)
return n
def hash_callback(self,ckey,keybytes):
key = loads(ckey[:keybytes])
return self.hash_caller(key,self)
def map(self,nmap,map,ptr=None,addflag=0):
self.map_caller = map
self.map_argcount = map.func_code.co_argcount
self.map_ptr = ptr
if not addflag:
n = self.lib.MR_map(self.mr,nmap,self.map_def,None)
else:
n = self.lib.MR_map_add(self.mr,nmap,self.map_def,None,addflag)
return n
def map_callback(self,itask,kv,dummy):
self.kv = kv
if self.map_argcount == 2: self.map_caller(itask,self)
else: self.map_caller(itask,self,self.map_ptr)
def map_file(self,files,selfflag,recurse,readfile,map,ptr=None,addflag=0):
self.map_caller = map
self.map_argcount = map.func_code.co_argcount
self.map_ptr = ptr
cfiles = (c_char_p*len(files))(*files) # array of C strings from list
if not addflag:
n = self.lib.MR_map_file(self.mr,len(cfiles),cfiles,
selfflag,recurse,readfile,
self.map_file_def,None)
else:
n = self.lib.MR_map_file_add(self.mr,len(cfiles),cfiles,
selfflag,recurse,readfile,
self.map_file_def,None,addflag)
return n
def map_file_callback(self,itask,file,kv,dummy):
self.kv = kv
if self.map_argcount == 3: self.map_caller(itask,file,self)
else: self.map_caller(itask,file,self,self.map_ptr)
def map_file_char(self,nmap,files,recurse,readfile,sepchar,delta,map,
ptr=None,addflag=0):
self.map_caller = map
self.map_argcount = map.func_code.co_argcount
self.map_ptr = ptr
cfiles = (c_char_p*len(files))(*files) # array of C strings from list
if not addflag:
n = self.lib.MR_map_file_char(self.mr,nmap,len(files),cfiles,
recurse,readfile,
ord(sepchar),delta,self.map_str_def,None)
else:
n = self.lib.MR_map_file_char_add(self.mr,nmap,len(files),cfiles,
recurse,readfile,
ord(sepchar),delta,
self.map_str_def,None,addflag)
return n
def map_file_str(self,nmap,files,recurse,readfile,sepstr,delta,map,
ptr=None,addflag=0):
self.map_caller = map
self.map_argcount = map.func_code.co_argcount
self.map_ptr = ptr
cfiles = (c_char_p*len(files))(*files) # array of C strings from list
if not addflag:
n = self.lib.MR_map_file_str(self.mr,nmap,len(files),cfiles,
recurse,readfile,
sepstr,delta,self.map_str_def,None)
else:
n = self.lib.MR_map_file_str_add(self.mr,nmap,len(files),cfiles,
recurse,readfile,
sepstr,delta,
self.map_str_def,None,addflag)
return n
def map_str_callback(self,itask,cstr,size,kv,dummy):
self.kv = kv
str = cstr[:size]
if self.map_argcount == 3: self.map_caller(itask,str,self)
else: self.map_caller(itask,str,self,self.map_ptr)
def map_mr(self,mr,map,ptr=None,addflag=0):
self.map_caller = map
self.map_argcount = map.func_code.co_argcount
self.map_ptr = ptr
if not addflag:
n = self.lib.MR_map_mr(self.mr,mr.mr,self.map_mr_def,None)
else:
n = self.lib.MR_map_mr_add(self.mr,mr.mr,self.map_mr_def,None,addflag)
return n
def map_mr_callback(self,itask,ckey,keybytes,cvalue,valuebytes,kv,dummy):
self.kv = kv
key = loads(ckey[:keybytes])
value = loads(cvalue[:valuebytes])
if self.map_argcount == 4: self.map_caller(itask,key,value,self)
else: self.map_caller(itask,key,value,self,self.map_ptr)
def open(self,addflag=0):
if not addflag: self.lib.MR_open(self.mr)
else: self.lib.MR_open_add(self.mr,addflag)
def print_screen(self,proc,nstride,kflag,vflag):
self.lib.MR_print(self.mr,proc,nstride,kflag,vflag)
def print_file(self,file,fflag,proc,nstride,kflag,vflag):
self.lib.MR_print_file(self.mr,file,fflag,proc,nstride,kflag,vflag)
def reduce(self,reduce,ptr=None):
self.reduce_caller = reduce
self.reduce_argcount = reduce.func_code.co_argcount
self.reduce_ptr = ptr
n = self.lib.MR_reduce(self.mr,self.reduce_def,None)
return n
def reduce_callback(self,ckey,keybytes,multivalue,nvalues,valuesizes,
kv,dummy):
self.kv = kv
key = loads(ckey[:keybytes])
mvalue = []
start = 0
for i in xrange(nvalues):
stop = start + valuesizes[i]
value = loads(multivalue[start:stop])
mvalue.append(value)
start = stop
if self.reduce_argcount == 3: self.reduce_caller(key,mvalue,self)
else: self.reduce_caller(key,mvalue,self,self.reduce_ptr)
def scan_kv(self,scan,ptr=None):
self.scan_caller = scan
self.scan_argcount = scan.func_code.co_argcount
self.scan_ptr = ptr
n = self.lib.MR_scan_kv(self.mr,self.scankv_def,None)
return n
def scankv_callback(self,ckey,keybytes,cvalue,valuebytes,dummy):
key = loads(ckey[:keybytes])
value = loads(cvalue[:valuebytes])
if self.scan_argcount == 3: self.scan_caller(key,value)
else: self.scan_caller(key,value,self.scan_ptr)
def scan_kmv(self,scan,ptr=None):
self.scan_caller = scan
self.scan_argcount = scan.func_code.co_argcount
self.scan_ptr = ptr
n = self.lib.MR_scan_kmv(self.mr,self.scankmv_def,None)
return n
def scankmv_callback(self,ckey,keybytes,multivalue,nvalues,valuesizes,dummy):
key = loads(ckey[:keybytes])
mvalue = []
start = 0
for i in xrange(nvalues):
stop = start + valuesizes[i]
value = loads(multivalue[start:stop])
mvalue.append(value)
start = stop
if self.scan_argcount == 3: self.scan_caller(key,mvalue)
else: self.scan_caller(key,mvalue,self.scan_ptr)
def scrunch(self,nprocs,key):
ckey = dumps(key,1)
n = self.lib.scrunch(self.mr,nprocs,ckey,len(ckey))
return n
def multivalue_blocks(self):
n = self.lib.multivalue_blocks(self.mr)
return n
def multivalue_block(self,iblock,multivalue,valuesizes):
# might need to pass back a tuple of 3 things?
# doc these 2 funcs in Python interface
# check that reduce and compress callbacks can handle NULL case and MR ptr
n = self.lib.multivalue_block(self.mr,iblock,multivalue,valuesizes)
return n
def sort_keys(self,compare):
self.compare_caller = compare
n = self.lib.MR_sort_keys(self.mr,self.compare_def)
return n
def sort_keys_flag(self,flag):
n = self.lib.MR_sort_keys_flag(self.mr,flag)
return n
def sort_values(self,compare):
self.compare_caller = compare
n = self.lib.MR_sort_values(self.mr,self.compare_def)
return n
def sort_values_flag(self,flag):
n = self.lib.MR_sort_values_flag(self.mr,flag)
return n
def sort_multivalues(self,compare):
self.compare_caller = compare
n = self.lib.MR_sort_multivalues(self.mr,self.compare_def)
return n
def sort_multivalues_flag(self,flag):
n = self.lib.MR_sort_multivalues_flag(self.mr,flag)
return n
def compare_callback(self,cobj1,len1,cobj2,len2):
obj1 = loads(cobj1[:len1])
obj2 = loads(cobj2[:len2])
return self.compare_caller(obj1,obj2)
def kv_stats(self,level):
n = self.lib.MR_kv_stats(self.mr,level)
return n
def kmv_stats(self,level):
n = self.lib.MR_kmv_stats(self.mr,level)
return n
def mapstyle(self,value):
self.lib.MR_set_mapstyle(self.mr,value)
def all2all(self,value):
self.lib.MR_set_all2all(self.mr,value)
def verbosity(self,value):
self.lib.MR_set_verbosity(self.mr,value)
def timer(self,value):
self.lib.MR_set_timer(self.mr,value)
def memsize(self,value):
self.lib.MR_set_memsize(self.mr,value)
def minpage(self,value):
self.lib.MR_set_minpage(self.mr,value)
def maxpage(self,value):
self.lib.MR_set_maxpage(self.mr,value)
def add(self,key,value):
ckey = dumps(key,1)
cvalue = dumps(value,1)
self.lib.MR_kv_add(self.kv,ckey,len(ckey),cvalue,len(cvalue))
def add_multi_static(self,keys,values):
n = len(keys)
ckeys = ""
cvalues = ""
for i in xrange(n):
ckey = dumps(keys[i],1)
cvalue = dumps(values[i],1)
ckeys += ckey
cvalues += cvalue
keybytes = len(ckeys)/n
valuebytes = len(cvalues)/n
self.lib.MR_kv_add_multi_dynamic(self.kv,n,
ckeys,keybytes,cvalues,valuebytes)
def add_multi_dynamic(self,keys,values):
n = len(keys)
ckeys = ""
cvalues = ""
keybytes = (c_int*n)()
valuebytes = (c_int*n)()
for i in xrange(n):
ckey = dumps(keys[i],1)
cvalue = dumps(values[i],1)
keybytes[i] = len(ckey)
valuebytes[i] = len(cvalue)
ckeys += ckey
cvalues += cvalue
self.lib.MR_kv_add_multi_dynamic(self.kv,n,
ckeys,keybytes,cvalues,valuebytes)
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