[zfs-discuss] How big a write to a regular file is atomic?

2007-03-28 Thread Richard L. Hamilton 
and does it vary by filesystem type? I know I ought to know the
answer, but it's been a long time since I thought about it, and
I must not be looking at the right man pages.  And also, if it varies,
how does one tell?  For a pipe, there's fpathconf() with _PC_PIPE_BUF,
but how about for a regular file?
 
 
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Re: [zfs-discuss] How big a write to a regular file is atomic?

2007-03-28 Thread Manoj Joseph 

Richard L. Hamilton wrote:

and does it vary by filesystem type? I know I ought to know the
answer, but it's been a long time since I thought about it, and
I must not be looking at the right man pages.  And also, if it varies,
how does one tell?  For a pipe, there's fpathconf() with _PC_PIPE_BUF,
but how about for a regular file?


For ZFS, it is atomic up to the whole-block level.

See: http://www.opensolaris.org/jive/thread.jspa?messageID=18705#18818

-Manoj

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