This reminds me: have we tested the compatibility of this new release with previous versions? For instance, if we upgrade HBase to the incubator release but not HDFS, will tracing work only as far as that? Worse, will we get exceptions tossed from mismatch in the guts? Everything should be fine from over-the-wire point of view, but we should check the in-process story.
-n On Fri, Jan 16, 2015 at 9:44 AM, Stack <[email protected]> wrote: > You the man CPMcC. > St.Ack > > On Fri, Jan 16, 2015 at 12:30 AM, Colin P. McCabe <[email protected]> > wrote: > > > Hi all, > > > > I've got some good news that I figured I'd post to the list! Today I > added > > a bunch of htrace integrating to HDFS, in > > https://issues.apache.org/jira/browse/HDFS-7189. This patch adds > tracing > > for a whole host of DFS client operations, such as rename and delete. > > > > Obviously this will be helpful for HDFS users, and it should also > increase > > our ability to follow HBase operations all the way back into HDFS via > > HTrace-- for example when HBase is deleting or moving a WAL, etc. > > > > The last big piece of HTrace integration for HDFS is integration into the > > output stream (i.e. the write path). This should be coming soon, so stay > > tuned. > > > > cheers, > > Colin > > >
