On Wed, 27 Apr 2011, huang jun wrote: > hi,developers > when write a file, why did client send a message to mds to change > the variable "max_size" in inode ? so, if we don't change the > "max_size", what consequence we will get? and why the client will > not write if the mds didn't return the changed "max_size" to client?
The max_size sets a bound on the number of data objects the client is allowed to write to, which in turn bounds the amount of work probing objects that MDS has to do if the client crashes to recover the file size and mtime. Setting it larger will let the client write more data faster, but will mean more work if the client crashes. sage -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
