Unconfigured Ad

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • szilva
    Member
    • Aug 2009
    • 16

    #1

    benchmarking BLAST

    Dear All,

    I am doing some performance testing using NCBI BLAST and I am looking for a protocol and/or dataset that can be used as a reference for benchmarking. I already ran some tests but I am not sure I was doing the right thing in the right way. Had a look at the ancient paper by Shpaer (
    http://dx.doi.org/10.1006/geno.1996.0614 ) but neither the aim of the article nor the data is really relevant from my point of view.

    What I want:
    - is to find bottlenecks and quasi-optimal parameter sets for different scenarios where BLAST (more precisely the BLAST sw suite: [t]blast[pnx], megablast, etc) is used.

    What I did:

    - downloaded the NCBI C++ Toolkit and compiled it for both production and profiling configuration (using GCC)
    - downloaded the STS database set for blastn and put it into the RAM of my PC trying to minimize the IO overhead (apparently the sw is still IO bound but much faster than reading data from disk)
    - ran a simple blastn search for 50, 500, 5K, 50K and 500K long nucleotide sequences - they were actually snippets from DS231696 (Fusarium data) to collect timing information.

    What I got:
    - profiling information for the default parameter set: the preliminar results are making sense, but I am still not sure I am on the right path.
  • westerman
    Rick Westerman
    • Jun 2008
    • 1104

    #2
    Seems reasonable enough. I probably would include snippets from other organisms as well in order to avoid biases such as CG-content.

    Comment

    Latest Articles

    Collapse

    • kinpict.com
      Reply to 16S/ITS Profiling vs. Shotgun Metagenomics: What Changes in Your Workflow?
      by kinpict.com
      The part about this topic feels surprisingly grounded, and the details on the page is the bit that made me slow down. I’d keep <a href="https://kinpict.com/">ai family photo generator</a> bookmarked for later.
      Today, 06:37 PM
    • SEQadmin2
      16S/ITS Profiling vs. Shotgun Metagenomics: What Changes in Your Workflow?
      by SEQadmin2





      NGS has revolutionized clinical microbiology by offering new ways to identify and surveil pathogens without prior knowledge of the target. One popular approach is 16S rRNA and ITS amplicon sequencing, which targets specific microbial markers. But studies are increasingly incorporating shotgun metagenomics, a technique that sequences all DNA from a sample without targeting specific microbial markers. This approach allows more detailed taxonomic classification,...
      10-30-2026, 06:46 AM

    ad_right_rmr

    Collapse

    News

    Collapse

    Topics Statistics Last Post
    Started by SEQadmin2, 11-12-2026, 07:59 AM
    0 responses
    27 views
    0 reactions
    Last Post SEQadmin2  
    Started by SEQadmin2, 11-05-2026, 09:25 AM
    0 responses
    35 views
    0 reactions
    Last Post SEQadmin2  
    Started by SEQadmin2, 11-03-2026, 11:54 AM
    2 responses
    56 views
    0 reactions
    Last Post kinpict.com  
    Started by SEQadmin2, 10-28-2026, 09:57 AM
    0 responses
    175 views
    0 reactions
    Last Post SEQadmin2  
    Working...