[SciPy-User] Problem with Python + Hadoop: how to link .so outside Python
Xiong Deng
dbigbear at gmail.com
Wed Aug 31 08:29:30 EDT 2011
Hi,
I have successfully installed scipy on my Python 2.7 on my local Linux, and
I want to pack my Python2.7 (with scipy) onto Hadoop and run my Python
MapReduce scipts, like this:
20 ${HADOOP_HOME}/bin/hadoop streaming \$
21 -input "${input}" \$
22 -output "${output}" \$
23 -mapper "python27/bin/python27.sh rp_extractMap.py" \$
24 -reducer "python27/bin/python27.sh rp_extractReduce.py" \$
25 -partitioner org.apache.hadoop.mapred.lib.KeyFieldBasedPartitioner
\$
26 -file rp_extractMap.py \$
27 -file rp_extractReduce.py \$
28 -file shitu_conf.py \$
29 -cacheArchive "/share/python27.tar.gz#python27" \$
30 -outputformat org.apache.hadoop.mapred.TextOutputFormat \$
31 -inputformat org.apache.hadoop.mapred.CombineTextInputFormat \$
32 -jobconf mapred.max.split.size="512000000" \$
33 -jobconf mapred.job.name="[reserve_price][rp_extract]" \$
34 -jobconf mapred.job.priority=HIGH \$
35 -jobconf mapred.job.map.capacity=1000 \$
36 -jobconf mapred.job.reduce.capacity=200 \$
37 -jobconf mapred.reduce.tasks=200$
38 -jobconf num.key.fields.for.partition=2$
I have to do this, because the Hadoop server installed its own python of
very low version which may not support some of my python scripts, and I do
not have privelege to install scipy lib on the server. So,I have to use the
-cacheArchieve command to use my own python2.7 with scipy....
But, I find out that some of the .so in scipy are linked to other dynamic
libs outside Python2.7.. For example
$ ldd
~/local/python-2.7.2/lib/python2.7/site-packages/scipy/linalg/flapack.so
liblapack.so => /usr/local/atlas/lib/liblapack.so
(0x0000002a956fd000)
libatlas.so => /usr/local/atlas/lib/libatlas.so (0x0000002a95df3000)
libgfortran.so.3 =>
/home/work/local/gcc-4.6.1/lib64/libgfortran.so.3 (0x0000002a9668d000)
libm.so.6 => /lib64/tls/libm.so.6 (0x0000002a968b6000)
libgcc_s.so.1 => /home/work/local/gcc-4.6.1/lib64/libgcc_s.so.1
(0x0000002a96a3c000)
libquadmath.so.0 =>
/home/work/local/gcc-4.6.1/lib64/libquadmath.so.0 (0x0000002a96b51000)
libc.so.6 => /lib64/tls/libc.so.6 (0x0000002a96c87000)
libpthread.so.0 => /lib64/tls/libpthread.so.0 (0x0000002a96ebb000)
/lib64/ld-linux-x86-64.so.2 (0x000000552aaaa000)
So, my question is: how can I include this libs? Should I search for all the
linked .so and .a under my local linux and pack them together with
Python2.7??? If yes, How can I get a full list of the libs needed and How
can make Python2.7 know where to find the new libs??
Thanks
Xiong
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