23 декабря 2011 г. 22:48 пользователь Todd Lipcon <t...@cloudera.com>написал:
> On Tue, Dec 20, 2011 at 12:56 AM, Andrey Stepachev <oct...@gmail.com> > wrote: > > I see, that most issues addressed to HA branch. > > What version this branch is applied to? 0.22 or > > i should build hadoop from sources? > > It's currently only available in the HDFS-1623 branch, which is in > active development and definitely shouldn't be used unless you plan to > help us finish debugging it :) There are still some known bugs and > deficiencies to address before we merge. > Looks like this is one of possible scenarios :). We need some solution for HA, but no one (except MapR) still exists. So we must use MapR (costs, closed) or debug some not-ready-yet solution. > > The plan is to merge it into 0.23 but not 0.22 - it will hopefully be > merged in January. We'll also make it available in CDH4 beta releases > early next year. > Sounds good. But still can't find such branch in cloudera (or any other) github repositories. Is it publicly available right now, or it in some private repository? > > -Todd > > > > > 20 декабря 2011 г. 11:46 пользователь Todd Lipcon <t...@cloudera.com > >написал: > > > >> Hi Andrey, > >> > >> I don't think anyone has ever run Ceph in a production use case, much > >> less run it in a production use case with HBase. > >> > >> The SPOF problem is currently being addressed and will be available > >> for production use by the middle of next calendar year. It will be > >> available for preview/beta usage in Q1 (it's already working in > >> development setups - feel free to follow HDFS-1623 for details) > >> > >> I think you're way better off waiting for the HA NameNode support in > >> HDFS than going with an unproven FS like Ceph. Ceph certainly has > >> promise and is a nice design, but it hasn't had the years of pounding > >> that HDFS has. > >> > >> -Todd > >> > >> On Mon, Dec 19, 2011 at 10:23 PM, Andrey Stepachev <oct...@gmail.com> > >> wrote: > >> > Hi all. > >> > > >> > I have requirements to use hbase in several datacenters. > >> > But HDFS has as SPOF, so we can't use it. > >> > I plan to use ceph as the file system for hbase. > >> > > >> > In general, interested in issues of: > >> > a) use the hadoop + сeph in the production environment > >> > b) using hbase + ceph in the production environment > >> > > >> > In particular: > >> > Ceph Wiki states that the integration of hadoop/ceph has the problem > in > >> the > >> > form of modification dates of the files. > >> > Does hbase uses modification times for some critical tasks? > >> > > >> > -- > >> > Andrey. > >> > >> > >> > >> -- > >> Todd Lipcon > >> Software Engineer, Cloudera > >> > > > > > > > > -- > > Андрей. > > > > -- > Todd Lipcon > Software Engineer, Cloudera > -- Андрей.
