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samtools sort -m 5000000 unsorted_in.bam sorted_out Read the specified unsorted_in.bam as input, sort it in blocks up to 5 million k (5 Gb) [ units verification needed ] and write output to a series of bam files named sorted_out.0000.bam , sorted_out.0001.bam , etc., where all bam 0 reads come before any bam 1 read, etc. [ verification needed ]
Binary Alignment Map (BAM) is the comprehensive raw data of genome sequencing; [1] it consists of the lossless, compressed binary representation of the Sequence Alignment Map-files. [2] [3] BAM is the compressed binary representation of SAM (Sequence Alignment Map), a compact and index-able representation of nucleotide sequence alignments. [4]
The binary equivalent of a SAM file is a Binary Alignment Map (BAM) file, which stores the same data in a compressed binary representation. [4] SAM files can be analysed and edited with the software SAMtools. [1] The header section must be prior to the alignment section if it is present.
www.htslib.org /doc /samtools-mpileup.html Pileup format is a text-based format for summarizing the base calls of aligned reads to a reference sequence. This format facilitates visual display of SNP /indel calling and alignment.
The Variant Call Format or VCF is a standard text file format used in bioinformatics for storing gene sequence or DNA sequence variations. The format was developed in 2010 for the 1000 Genomes Project and has since been used by other large-scale genotyping and DNA sequencing projects.
A database index is a data structure that improves the speed of data retrieval operations on a database table at the cost of additional writes and storage space to maintain the index data structure. Indexes are used to quickly locate data without having to search every row in a database table every time said table is accessed.
A simple lexicographical sort can divide the index size by 9 and make indexes several times faster. [19] The larger the table, the more important it is to sort the rows. Reshuffling techniques have also been proposed to achieve the same results of sorting when indexing streaming data. [14]
Sorting can be done in separate files, such as using a DOS-prompt command: SORT myfile.DAT > myfile2.DAT, or else use a text-editor such as NoteTab, which has a modify-lines-sort option. Edit-tricks are most useful when multiple tables must be changed, then the time needed to develop complex edit-patterns can be applied to each table.