If you are doing append writes it is always atomic. On Sat, Mar 24, 2012 at 3:19 PM, Jaka Jančar <[email protected]> wrote:
> That is besides the point. The question is, will the fs.write()'s map 1:1 > to write()'s? > > > On Saturday, March 24, 2012 11:05:25 PM UTC+1, Jorge wrote: >> >> On Mar 24, 2012, at 6:08 PM, Jaka Jančar wrote: >> >> > I'm writing a node.js server that uses the cluster module. Each worker >> > does *lots* of logging to a shared log file (it must be just 1 file). >> > >> > - Assuming log lines are smaller than PIPE_BUF (4k), is it safe to do >> > fs.write() and rely on it being atomic, or does Node.js break this >> > promise of write()? >> > >> > - What's with "Note that it is unsafe to use fs.write multiple times >> > on the same file without waiting for the callback."? >> > >> > - If writes are not atomic or not waiting for callbacks really is a >> > problem, what's an *efficient* alternative? >> >> When you have several fs.write()s going on at once, they may end up being >> executed in parallel in a bunch of (up to 4 IIRC) background (libeio's) >> threads, so the write()s may actually happen in ~ any order. If you instead >> wait for the callback before issuing the next write(), then you're >> serializing them. >> -- >> Jorge. >> >> -- > Job Board: http://jobs.nodejs.org/ > Posting guidelines: > https://github.com/joyent/node/wiki/Mailing-List-Posting-Guidelines > You received this message because you are subscribed to the Google > Groups "nodejs" group. > To post to this group, send email to [email protected] > To unsubscribe from this group, send email to > [email protected] > For more options, visit this group at > http://groups.google.com/group/nodejs?hl=en?hl=en > -- Job Board: http://jobs.nodejs.org/ Posting guidelines: https://github.com/joyent/node/wiki/Mailing-List-Posting-Guidelines You received this message because you are subscribed to the Google Groups "nodejs" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/nodejs?hl=en?hl=en
