Yep, that's right. -Todd
On Wed, Oct 24, 2012 at 4:58 PM, Sujee Maniyam <su...@sujee.net> wrote: > Hi Todd, > thanks! > > So > FSEditLog.java :: createJournal(URI uri) > is where a specific journal is chosen. > Config parameters are : dfs.namenode.shared.edits.dir and > dfs.namenode.edits.journal-plugin > > correct? > > regards > Sujee > > http://sujee.net > > > On Tue, Oct 23, 2012 at 4:49 PM, Todd Lipcon <t...@cloudera.com> wrote: > > Hi Sujee, > > > > QuorumJournalManager implements the JournalManager interface. The javadoc > > on JournalManager may help you understand. Also, I would recommend > > understanding the local-disk implementation (FileJournalManager) before > > digging too deep into the QuorumJournalManager, which is a bit more > complex. > > > > -Todd > > > > On Tue, Oct 23, 2012 at 3:31 PM, Sujee Maniyam <su...@sujee.net> wrote: > > > >> Hi devs, > >> I am reading through the HA code, trying to understand how the > >> editlogs propagate. > >> > >> I have looked at the following classes > >> EditLogTailer > >> JournalNode > >> QuorumJournalManager > >> NameNode > >> FSNameSystem > >> > >> I see FSNameSystem is using FSImage editlog. where is the tie-in > >> between NN and QuorumJournal? > >> > >> thanks > >> Sujee Maniyam > >> > >> http://sujee.net > >> > > > > > > > > -- > > Todd Lipcon > > Software Engineer, Cloudera > -- Todd Lipcon Software Engineer, Cloudera
