STINNER Victor <vstin...@python.org> added the comment:
Hi, the io module doesn't use the block size of the filesystem. io.BufferedReader uses a default buffer size of 8 * 1024 bytes. I don't think that it's really important to respect the block size in Python. There are buffers at many levels. io.BufferedReader is a buffer in user space, but there is also a buffer in the kernel. I'm not sure how relevant is to use know that a "disk sector" is 4096 bytes, when most people use SSDs which use way larger SSD blocks (ex: 512 KB). It's hard to say what's real block size. The disk firmware can lie (pretend it's 4 KiB) or the kernel can lie. The disk firmware can emulate different "block sizes". If you write a database, maybe you would like to start caring about that, but you may want to use direct I/O (O_DIRECT) flag for that. In short, Python works as expect, it's efficient and you should not worry about that ;-) ---------- nosy: +vstinner _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue24666> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
