bq. how that - apparently wrong - information came about Maybe Sean / Misty can give some context.
Cheers On Tue, Mar 7, 2017 at 6:37 AM, Lars George <lars.geo...@gmail.com> wrote: > Hey Ted, > > Thanks Cpt. Obvious :) > > I know how to use "blame" or git log how to find the JIRA, but what I was > after is how that - apparently wrong - information came about. And if it is > wrong, what _is_ the current status of this feature. > > I do believe this is an important operational piece as it helps with > rearranging clusters. Since it seems to still be missing, I am wondering > what needs to be done here. > > Makes sense? > > Lars > > Sent from my iPhone > > > On 6 Mar 2017, at 19:50, Ted Yu <yuzhih...@gmail.com> wrote: > > > > w.r.t. the first question, the quoted paragraph came from: > > > > HBASE-15332 Document how to take advantage of HDFS-6133 in HBase > > > >> On Mon, Mar 6, 2017 at 6:38 PM, Lars George <lars.geo...@gmail.com> > wrote: > >> > >> Hi, > >> > >> I am trying to grok what came out of all these issues about the HDFS > >> balancer and being able to avoid it destroying HBase locality. There > >> is this https://issues.apache.org/jira/browse/HBASE-13021 from JM, and > >> the book http://hbase.apache.org/book.html#_hbase_and_hdfs refers to > >> https://issues.apache.org/jira/browse/HDFS-6133, stating: > >> > >> "HDFS-6133 provides the ability to exclude a given directory from the > >> HDFS load balancer, by setting the dfs.datanode.block-pinning.enabled > >> property to true in your HDFS configuration and running the following > >> hdfs command: > >> > >> $ sudo -u hdfs hdfs balancer -exclude /hbase" > >> > >> I checked the Balancer class in 2.7.2 and it does not have that > >> support, i.e. being able to exclude a path, it can only exclude hosts. > >> That is also clear from HDFS-6133, which adds favoured nodes, but not > >> being able to exclude paths (which would be nice). > >> > >> HBASE-13021 mentions that this works in tandem with the HBase favored > >> node feature, but that makes it much more complicated since you have > >> to pin individual regions to nodes, instead of doing that wholesale. > >> > >> Where does the above in the HBase book come from, and what is the > >> current state as far as you know? > >> > >> Cheers, > >> Lars > >> >
