> Nodetool reports: 1.1.6-dse-p1 If you are using DSE the best place to get help is the support forums http://www.datastax.com/support-forums/
Cheers ----------------- Aaron Morton Freelance Cassandra Developer New Zealand @aaronmorton http://www.thelastpickle.com On 24/11/2012, at 6:34 AM, Simon Guindon <simon.guin...@jsitelecom.com> wrote: > Aaron, > > Nodetool reports: 1.1.6-dse-p1 > > What about inserted data using Hadoop? Will the secondary index execute > concurrently or will this also be single threaded (on the same machine I > mean)? > > From: aaron morton [mailto:aa...@thelastpickle.com] > Sent: November-22-12 8:04 PM > To: user@cassandra.apache.org > Subject: Re: Concurrency and secondary indexes > > What version are you on ? > > > but we are finding a secondary index is performing slow > Not sure what you mean here. > > Are secondary indexes concurrent or single threaded? > Rebuilding a secondary index (via node tool) is a single threaded operation, > but *all* indexes specified on the command line are built at the same time. > Rebuilding any one index requires reading all the rows in the CF. > > Cheers > > ----------------- > Aaron Morton > Freelance Cassandra Developer > New Zealand > > @aaronmorton > http://www.thelastpickle.com > > On 23/11/2012, at 8:20 AM, Simon Guindon <simon.guin...@jsitelecom.com> wrote: > > > We are importing data from one column family into a second column family via > “nodetool refresh” but we are finding a secondary index is performing slow > and the machine CPU is pretty much idle. We are trying to bulk load data as > fast as possible. > > Are secondary indexes concurrent or single threaded?
