Tried it, nsd started crashing and i am guessing that the problem is
combination of aio_write and mmap.
When is start spooling, i just submit aio_write and return immediately,
so there are a lot of quick aio_write calls. By the time i reach mmap,
it looks like it's always ahead of actual writing, so even when i am
trying to check aio_error/aio_fsync in the NsGetRequest, i still get
SIGBUS/SIGSEGV when i access reqPtr->content, looks like mmap and
aio_write are out of sync. And there is no way to wait until all file
buffers will be flushed, so manual separate thread implementation could
be the only portable solution. Or i just do not understand aio_xxx
things completely.
Zoran Vasiljevic wrote:
Am 31.12.2005 um 20:12 schrieb Vlad Seryakov:
aio_read/aio_write system calls look like supported ubnder Linux
yes. most of modern os's support some kind of kaio.
I have checked solaris, linux and darwin and all do.
the problem with spawning yet another thread is
system resources. each new thread (on solaris)
results in an lwp which is not cheap. therfore I'd
opt to use aio for largefile spooling.
Zoran
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