Re: [Seqan-dev] Random access of large FASTA file
Am 21.07.2011 um 17:26 schrieb Johannes Dröge:
> Thanks for you nice explanation. So open() is the magic function do apply to a ConcatDirect StringSet. Sorry for bugging you further, before I start with the implementation I have some final questions...
>
Actually, you don't call open with the StringSet but both of its members limits and concat.
> My primary target is the in-memory sequence storage, as I wrote, so for this I do not need to specialize the limits object. I suppose open() works with regular Alloc strings as well?
>
Yes, but before need to call save() before destructing the String to synchronize changes in the string with the file on disk.
> Where are temporary MMap files usually stored?
In the system-wide temporary folder, unless you defined a different folder in the environment variable TMPDIR.
>
> Can I somehow use read-only file access with persistent MMap files?
Yes, see:
http://www.seqan.de/dddoc/html_devel/FUNCTION.open.html
>
> Gruß Johannes
>
Gruß,
David
