On Sat, Nov 5, 2011 at 12:53 AM, Flavio Junqueira <[email protected]> wrote: > > On Nov 5, 2011, at 5:37 AM, lars hofhansl wrote: > >> One thing I was wondering: Why bookkeeper? Why not store the WAL itself in >> HBase? That way >> you might not even need a separate server. >> > > Lars, The key reasons are performance and scalability. We also would like to > have region servers at some point using BookKeeper for WAL for our > applications, even though the figure doesn't show it. In that case, we have > a common platform for WAL. We have a jira open about it, but we haven't made > progress in a while due to other priorities and some issues with the WAL > interface, but we have been planning on getting back to it. > > Btw, I'm assuming you know about the project: > http://zookeeper.apache.org/bookkeeper/ >
Please keep us posted on project. It sounds like an interesting experiment. What is the JIRA so we can follow. What are the WAL Interface issues (same as for NN?). Thanks Flavio, St.Ack
