Phillip Susi wrote:
> Denis Vlasenko wrote:
>> You mean "You can use aio_write" ?
>
> Exactly. You generally don't use O_DIRECT without aio. Combining the
> two is what gives the big win.
Well, it's not only aio. Multithreaded I/O also helps alot -- all this,
say, to utilize a raid array with many spindles.
But even single-threaded I/O but in large quantities benefits from O_DIRECT
significantly, and I pointed this out before. It's like enabling a write
cache on disk AND doing intensive random writes - the cache - surprizingly -
slows whole thing down by 5..10%.
/mjt
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
