How To Downlad Blastall Executable

Question

[Pierre]

Hi,

It seems that the old version of blast (blastall) can make use of multithread processing and speed up things whereas new blast+ versions get stuck to using single thread even when you set the parameters to ask for more threads.

Therefore, I would like to download and use the old blast. The problem is that I cannot seem to find in the ncbi ftp.

Can anyone direct me to the executable file for blastall? Alternatively, can I still use blastall parameters somehow in the new blast+?

Thanks

[anandkeshri99]

Do you find old blast do you have old blast

Answer 1

[Michael Schubert]

Setting aside whether the issue you describe is really a bug in the application, here is a link to the C BLAST executables:

ftp://ftp.ncbi.nlm.nih.gov/blast/executables/release/2.2.26/

Answer 2

[Pierre Lindenbaum]

you can find and compile the old versions of the NCBI tools here: ftp://ftp.ncbi.nlm.nih.gov/toolbox/ncbi_tools/old/

Answer 3

[JC]

Alternatively, can I still use blastall parameters somehow in the new blast+?

Use the legacy_blast.pl script included.