suggestion for multithreading
by Louise-Amélie Schmitt
Hello everyone,
I'm using TORQUE with Galaxy, and we noticed that if a tool is
multithreaded, the number of needed cores is not communicated to pbs,
leading to job crashes if the required resources are not available when
the job is submitted.
Therefore I modified a little the code as follows in
lib/galaxy/jobs/runners/pbs.py
256 # define PBS job options
257 attrs.append( dict( name = pbs.ATTR_N, value = str( "%s_%s_%
s" % ( job_wrapper.job_id, job_wrapper.tool.id, job_wrapper.user ) ) ) )
258 mt_file = open('tool-data/multithreading.csv', 'r')
259 for l in mt_file:
260 l = string.split(l)
261 if ( l[0] == job_wrapper.tool.id ):
262 attrs.append( dict( name = pbs.ATTR_l,
resource = 'nodes', value = '1:ppn='+str(l[1]) ) )
263 attrs.append( dict( name = pbs.ATTR_l,
resource = 'mem', value = str(l[2]) ) )
264 break
265 mt_file.close()
266 job_attrs = pbs.new_attropl( len( attrs ) +
len( pbs_options ) )
(sorry it didn't come out very well due to line breaking)
The csv file contains a list of the multithreaded tools, each line
containing:
<tool id>\t<number of threads>\t<memory needed>\n
And it works fine, the jobs wait for their turn properly, but
information is duplicated. Perhaps there would be a way to include
something similar in galaxy's original code (if it is not already the
case, I may not be up-to-date) without duplicating data.
I hope that helps :)
Best regards,
L-A
11 years, 5 months
RNA-seq Galaxy workflow for PE barcoded samples?
by Whyte, Jeffrey
Hello,
I posted to the seqanswers forum, but have not received any feedback. I am working with RNA-seq Illumina data files in Galaxy (http://main.g2.bx.psu.edu/). The two files are 100bp paired-end reads, multiplexed with barcoding to distinguish samples. The barcodes are the first four bases of the sequences in the s_7_1_sequence.txt file.
Would the following Galaxy workflow be correct?
1. Upload both s_7_1_sequence.txt and s_7_2_sequence.txt to Galaxy with the reference genome selected
2. Run NGS: QC and manipulation --> FASTQ Groomer on each file to convert to Sanger FASTQ
3. Run NGS: QC and manipulation --> FASTQ joiner to combine the data from the two files
4. Run FASTX-TOOLKIT FOR FASTQ DATA --> Barcode Splitter to generate separate FASTQ files for each barcode group
5. Run NGS: RNA Analysis --> Tophat to map the reads from each group to the reference genome
The problem I am having is that if I select paired-end for the library in Tophat, it requests two FASTQ files. Would I have to use FASTQ Splitter to separate the joined FASTQ files? If there is a more standard way to handle these types of barcoded files, I would appreciate hearing about this workflow.
Thanks very much in advance,
jjw
P.S. Galaxy is an incredibly useful resource. Thanks!
11 years, 6 months
Question regarding quality filtering of 454 amplicons
by Jackie Lighten
Hi,
I have a question for you guys regarding quality filtering.
I have a data set of double MID tagged 454 amplicons, from which I wish to
select high quality sequences above Q20.
The 454 quality filtering system seems to work differently from that given
for the Illumina sequencing i.e. 454 filtering takes high quality segments,
while Illumina (FASTQ) can select high quality full reads based on certain
parameters.
OK, so I know that the total length of my amplicon, including primers and
barcodes is around 260bp. If I then set the 454 quality filtering tool to
extract contiguous high quality sequence of >260, it gives me back around
45% of my raw data as hitting this criterion i.e. All 260bp are above Q20. I
don¹t necessarily need this high stringency as most bases may not be
informative.
But if I convert my 454 data to FASTQ format and then run the Illumina
filtering system which also allows me to set the number of bases allowed to
deviate from the Q20 criteria, I get back over 90% of my data (allowing 10bp
to deviate from Q20).
I then need to go ahead and convert back to 454 format.
Can you tell me if this is OK?
Will I loose /confuse information somewhere along these conversions?
It seems that if I do this, my barcodes are removed, as amplicons do not
sort properly when I parse them through my barcode filtering program.
Does anyone know of a program to filter 454 data based on average sequence
quality score, which doesn¹t involve Linux and the Roche off instrument
program (I have no experience in Linux! )
Thanks!
--
Jack Lighten,
Ph.D. Candidate,
Bentzen Lab,
Room 6078,
Department of Biology,
Dalhousie University,
Halifax, NS, B3H 4J1
Canada
Office:(902) 494-1398
Email: Jackie.Lighten(a)Dal.Ca
Profile: www.marinebiodiversity.ca/CHONe/Members/lightenj/profile/bio
11 years, 7 months
MACS
by Sher, Falak
while using MSCS tool from Galaxy I get following mesg. with BED file:
"Treatment tags and Control tags are uneven! FDR may be wrong"
Any suggestion to fix it..
I don't understand its implication, my data is form single illumina chIP-Seq experiment. I use Bowtie from Galaxy for mapping.
F
11 years, 7 months
Flagstat on BAM files
by Slim Sassi
Hello,
I tried to use NGS: SAM Tools ->flagstat on a BAM files for basic stats, but I got results like you see below. It doesn't seem to be working. Any suggestions?
26584869 in total
0 QC failure
0 duplicates
26584869 mapped (100.00%)
0 paired in sequencing
0 read1
0 read2
0 properly paired (-nan%)
0 with itself and mate mapped
0 singletons (-nan%)
0 with mate mapped to a different chr
0 with mate mapped to a different chr (mapQ>=5)
Thanks
Slim
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11 years, 8 months
Galaxy's recent problems
by Dave Clements
Hello all,
Galaxy has been ill recently due to disk space on the server filling up. In
the short term we are working on freeing up space. In the longer term we
are working on adding a quota system to limit how much space any one user
can take, and we've also ordered a lot more disk.
In the mean time, *please take a look at your saved histories and datasets
and delete anything you no longer need*. This will greatly help us get
through the current rough patch.
In the longer term, you can also consider setting up your own local Galaxy
instance, or running Galaxy on the cloud. See:
http://getgalaxy.org/
https://bitbucket.org/galaxy/galaxy-central/wiki/cloud
Thanks for your patience while we work this out,
Dave C and the Galaxy Team
--
http://galaxy.psu.edu/gcc2011/
http://getgalaxy.org
http://usegalaxy.org/
11 years, 8 months
Indel work flow questions
by Mike Dufault
Hi All,
I have a question about the NGS: Indel analysis and SNP Calling.
Assuming I have loaded my paired end reads, groomed, and got all the way through to alignment with BWA my question the becomes does the analysis for indel analysis and SNP analysis split in the work flow?
For SNP analysis, It seems that I need to filter on SAM, convert SAM-to-BAM, etc...
For Indel, It seem that I should use the BWA output that is in SAM format for indel analysis.
Are these two above statments correct?
I also have a question regarding the input for indel analysis. Should I use the BWA output directly (which is in SAM format) or should I first "filter on SAM" and use that output (which is also in SAM format).
I have tried the indel analysis using both filtered and unfilterd and I get very similar results. It seems to me that should use the "filtered on SAM" output where I can indicate that the reads are paired=Yes, proper pairs=yes, unmapped=NO.
Any thought, insight, etc.
Thanks if advance,
Mike
11 years, 9 months
RNA seq analysis
by puvan001＠umn.edu
I am new to Galaxy and I am not sure whether these topics were discussed
earlier. I followed the steps up to cufflinks and I did not have any
problems. Thanks for the RNA seq tutorial. My questions are
1. How do I know the number of reads mapped against the reference genome
used after Top Hat mapping
2. I am aware that Cuffdiff is used to find the differences in expression.
How do I combine replicates (3) of different treatments ?
SP
11 years, 9 months
Only first 5000 reads are displayed in this tile
by Jeremy Chien
Hi
During the visualization of my mRNAseq data, some area have red line
indicating that only the first 5000 reads are displayed. Within this
region, some area have many reads. Some area, where exons exist, I
don't see any reads. How do I interpret the data? If there are no
reads shown in the visualization, although there is a read line saying
only the first 5000 reads are displayed, does the absence of reads
corresponding to a particular exon means it is not expressed?
Thanks,
Jeremy
11 years, 9 months
