Samtools sort problem

[twotwo]

Hi,
I have bam file from tophat. And I want to sort it, and finally use HTSEq to generate the count file.
Here is my code:
samtools -n my.bam my_sort

After I ran it, it kept generating several files like:
my_sort.0000.bam
my_sort.0001.bam
my_sort.0002.bam
.
.
.

Is it normal? Just got frustrated about that.

[GenoMax]

That is normal. Once the sorting completes those temporary files will disappear.

From samtools manual:

sort samtools sort [-no] [-m maxMem] <in.bam> <out.prefix>

Sort alignments by leftmost coordinates. File <out.prefix>.bam will be created. This command may also create temporary files <out.prefix>.%d.bam when the whole alignment cannot be fitted into memory (controlled by option -m).

[twotwo]

That is normal. Once the sorting completes those temporary files will disappear.

From samtools manual:

Thanks so much!