Thanks for this Adrian. I've opened https://issues.apache.org/jira/browse/WHIRR-63.
Tom On Fri, Jul 30, 2010 at 4:35 PM, Adrian Cole <[email protected]> wrote: > In case you guys are curious. Jclouds supports the new cluster instances and > placement groups. We should talk about how whirr can use this info. > > Adrian > > -------- Original Message -------- > Subject: RE: placement groups > From: "Lipscomb, Trenton" <[email protected]> > To: Adrian Cole <[email protected]> > CC: null > > Sorry I missed a follow up on this. I haven't written up my trip report, and > your question was buried in there. Apologies. > > I asked the principal engineer on HPC and here was his repose. We've also > asked the PMs (who write the docs) to improve the explanations. > > > Clustered placement groups are relegated to a single AZ, and that will be > true forever. You can currently start more than one placement group in a > single AZ, and we expect that to be common. Each group will independently > experience the "clustering" benefits within the group, but not necessarily > between groups even in the same AZ. > > > > As the placement group API evolves, it's possible that future strategies will > straddle multiple AZs or even regions. > > Let me know if you need anything else. > > I hope, too, using the boot device flag helped you to keep track of which > volumes go with which hosts. > > *trenton > > > From: Adrian Cole [mailto:[email protected]] > Sent: Friday, July 30, 2010 1:09 PM > To: Lipscomb, Trenton > Subject: placement groups > > Hi, Trenton, > > Thanks for chatting with me at length during oscon. Let me know, if you've > found anything out about those new placement groups for the cluster > instances. I'm working with cloudera and would like to understand the scope > and usage correctly. > > Cheers, > Adrian > jclouds & opscode >
