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mpiblast [2010/01/18 12:15] – 172.26.0.166mpiblast [2010/01/19 10:09] – 172.26.0.166
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 http://wiki.bioinformatics.ucdavis.edu/index.php/MPI_Blast http://wiki.bioinformatics.ucdavis.edu/index.php/MPI_Blast
 +OpenMPI FAQ: http://www.open-mpi.org/faq/
  
 <code>$ mpiformatdb -i drosoph.nt -p F --nfrags=12</code> <code>$ mpiformatdb -i drosoph.nt -p F --nfrags=12</code>
  
-  * **--nfrags=10** Specifies how many database fragments you want to split the original database into. This should be equal to how many different nodes you want to run mpiblast on. +  * **nfrags** specifies how many database fragments you want to split the original database into. This should be equal to how many different nodes you want to run mpiblast on. 
  
-http://www.ncbi.nlm.nih.gov/blast/docs/update_blastdb.pl 
  
-===== Updating BLAST Databases ===== 
-http://www.ncbi.nlm.nih.gov/staff/tao/URLAPI/blastdb.html 
 ===== Notes on .ncbirc ==== ===== Notes on .ncbirc ====
 Notes on setting up the ''~/.ncbirc'' file from the mpiBLAST installation page: http://www.mpiblast.org/Docs/Install#unix Notes on setting up the ''~/.ncbirc'' file from the mpiBLAST installation page: http://www.mpiblast.org/Docs/Install#unix
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 Large databases like nt can consume several gigabytes of disk space and it is preferable to store them in compressed form. Starting with mpiBLAST 1.4.0 it is possible to pipe FastA formatted sequence data into mpiformatdb. This feature provides the ability to directly format a compressed (gzip/bzip etc.) database using command line syntax like: Large databases like nt can consume several gigabytes of disk space and it is preferable to store them in compressed form. Starting with mpiBLAST 1.4.0 it is possible to pipe FastA formatted sequence data into mpiformatdb. This feature provides the ability to directly format a compressed (gzip/bzip etc.) database using command line syntax like:
 <code>$ zcat nt.gz | mpiformatdb -i stdin -N 100 -t nt -p F</code> <code>$ zcat nt.gz | mpiformatdb -i stdin -N 100 -t nt -p F</code>
 +
 +==== SGE Support ====
 +See this FAQ entry: http://www.open-mpi.org/faq/?category=running#run-n1ge-or-sge
 +
 +<code>$ ompi_info | grep gridengine
 +                 MCA ras: gridengine (MCA v2.0, API v2.0, Component v1.3.2)</code>
 ===== Benchmarks ===== ===== Benchmarks =====
 <code>$ time blastall -d drosoph.nt -p blastn -i drosoph.seq -o drosoph.result <code>$ time blastall -d drosoph.nt -p blastn -i drosoph.seq -o drosoph.result
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 user    12m13.891s user    12m13.891s
 sys     0m56.631s</code> sys     0m56.631s</code>
 +
 +The number of processes for an MPI job should be +1 of the number of CPUs because one process is used as the master to control the other jobs.
 +===== Links =====
 +  * Submitting MPI jobs using SGE: http://www.shef.ac.uk/wrgrid/documents/gridengine.html
 +  * mpiBLAST Guide: http://www.mpiblast.org/Docs/Guide
 +  * Updating the BLAST databases: http://www.ncbi.nlm.nih.gov/blast/docs/update_blastdb.pl