+1 (binding) - Sijie
On Fri, Jun 9, 2017 at 1:38 PM, Jon Derrick <jonathan.derri...@gmail.com> wrote: > +1 (non-binding) > > On Fri, Jun 9, 2017 at 9:39 AM, Gerrit Sundaram <gerritsunda...@gmail.com> > wrote: > > > +1 (non-binding) > > > > On Fri, Jun 9, 2017 at 9:38 AM, Xi Liu <xi.liu....@gmail.com> wrote: > > > > > +1 (non-binding) > > > > > > On Fri, Jun 9, 2017 at 3:21 AM, Jia Zhai <zhaiji...@gmail.com> wrote: > > > > > > > +1 (non-binding) > > > > > > > > On Fri, Jun 9, 2017 at 3:02 PM, Stevo Slavić <ssla...@gmail.com> > > wrote: > > > > > > > > > +1 (non-binding) > > > > > > > > > > On Fri, Jun 9, 2017 at 8:47 AM, Sijie Guo <guosi...@gmail.com> > > wrote: > > > > > > > > > > > (dropping general@) > > > > > > > > > > > > - Sijie > > > > > > > > > > > > On Thu, Jun 8, 2017 at 5:21 PM, Sijie Guo <guosi...@gmail.com> > > > wrote: > > > > > > > > > > > > > ( /cc bookkeeper dev@ and incubator general@ for awareness ) > > > > > > > > > > > > > > Hi all, > > > > > > > > > > > > > > There was a joint discussion between BookKeeper PMC and > > > > DistributedLog > > > > > > > PPMC about moving the development of DistributedLog as part of > > > Apache > > > > > > > BookKeeper. The reasons behind it are: > > > > > > > > > > > > > > First, DistributedLog is born as an extension to BookKeeper, to > > > offer > > > > > > > continuous log streams as the service. The ledger API in > > bookkeeper > > > > is > > > > > a > > > > > > > lower level API and has learning curves, while the log stream > API > > > in > > > > > > > distributedlog is a higher level API that simplifies the usage. > > The > > > > > > > combination of ledger API and stream API would offer a better > > > > > > > developer/user experience for applications. > > > > > > > > > > > > > > Secondly, using ledgers to build continuous (re-openable) log > > > stream > > > > > is a > > > > > > > very common pattern for BookKeeper use cases. We did this for > > HDFS > > > > > > namenode > > > > > > > journal, for Hedwig, for DistributedLog, and for Pulsar. The > same > > > > > pattern > > > > > > > has been implemented again and again. Merge DistributedLog > (also > > > > > > > ManagedLedger in Pulsar) with BookKeeper will consolidate all > the > > > > > > > development efforts around this common 'log stream' pattern. > > > > > > > > > > > > > > Thirdly, the 'log' stream abstraction is a good abstraction for > > > both > > > > > > > messaging and streaming. Internally at BookKeeper, there are a > > few > > > > > places > > > > > > > that can use such 'messaging' facility to improve bookkeeper > > > itself. > > > > > the > > > > > > > log stream in DistributedLog can be used internally at > bookkeeper > > > for > > > > > > > streaming changes as well. > > > > > > > > > > > > > > We choose merging DistributedLog as subproject rather than > > modules. > > > > It > > > > > is > > > > > > > a softer starting point to avoid disrupting the folks who are > > > > depending > > > > > > on > > > > > > > the ledger api alone. The BookKeeper PMC and DistributedLog > PPMC > > > has > > > > > > > achieved initial consensus on this merge. There is an official > > VOTE > > > > > > ongoing > > > > > > > in bookkeeper PMC. We'd like to bring this to the > distributedlog > > > > > > community > > > > > > > for a community vote following the guidelines here > > > > > > > <http://incubator.apache.org/guides/graduation.html#subproject > >. > > > > > > > > > > > > > > Please vote +1 if in favor of merging DistributedLog to > > BookKeeper, > > > > and > > > > > > -1 > > > > > > > if not. The vote will be open until Tuesday 13rd June, 18:00 > PST. > > > > > > > > > > > > > > - Sijie > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > -- > - jderrick >
