Re: need some help understanding NN quorum edit log

Yep, that's right. -Todd On Wed, Oct 24, 2012 at 4:58 PM, Sujee Maniyam 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 > > co

Re: need some help understanding NN quorum edit log

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 wrote: > Hi S

Re: need some help understanding NN quorum edit log

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

need some help understanding NN quorum edit log

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