You can start downloading and using the code form the hadoop-0.20-append. thanks, dhruba
On Tue, Jun 15, 2010 at 8:24 AM, Todd Lipcon <[email protected]> wrote: > On Tue, Jun 15, 2010 at 5:31 AM, Jan Stöcker <[email protected]> > wrote: > > > Hello, > > > > > > > > in the hdfs-default.xml, I found the warning that the property > > > > "dfs.support.append" is false by default, because of the "append > > > > code" containing bugs. > > > > For our test case (which is not very complicated), I tried it out > > > > nevertheless (in a C program using libhdfs), and I did not > > > > encounter any problems yet. The only thing I noticed is that the > > > > modification date of the file to which I append is not changed. > > > > > > > > Could someone indicate which other bugs may occur? And in > > > > which cases? Because the append could be quite useful for me, > > > > and I would like to know the risk. > > > > Mostly in failure handling cases, but not entirely. The result is usually > truncated files, sometimes truncated as if your append didn't happen, > sometimes the entire last block going missing. Look for the 0.20-append fix > version on JIRA for a more significantly list. > > I'd recommend waiting a couple weeks and using the hadoop-0.20-append > branch > which will contain fixes for many of these bugs. > > -Todd > > > -- > Todd Lipcon > Software Engineer, Cloudera > -- Connect to me at http://www.facebook.com/dhruba
