Thanks, Sargun and Alexander! I tried setting pr, pw, and sloppy_quorum. It looks that these help. I got less stale values. But the issue wasn't completely resolved. I'm using Riak 2.1.2.
-Qiang On Thu, Mar 3, 2016 at 9:46 PM, Sargun Dhillon <sar...@sargun.me> wrote: > So, if you pass back the vclock while pr=pw=quorum, and sloppy_quorum > = false you should get RYOW consistency. > > On Thu, Mar 3, 2016 at 6:25 PM, Christopher Mancini <cmanc...@basho.com> > wrote: > > If you don't need strong consistency for all Riak requests, just certain > > ones, then explore the use of R and N vals that can be passed along with > the > > request or on a bucket-type level. > > > > On Thu, Mar 3, 2016 at 9:23 PM Mark Schmidt <mschm...@orcawave.net> > wrote: > >> > >> Hi Qiang, > >> > >> > >> > >> Other more skilled folks can correct me if I am wrong, but I believe you > >> can enforce strong consistency on your nodes: > >> http://docs.basho.com/riak/latest/theory/concepts/strong-consistency/ > >> > >> > >> > >> If I recall, you will take a performance hit as all nodes must receive > the > >> data. > >> > >> > >> > >> Thanks, > >> > >> > >> > >> - Mark Schmidt > >> > >> > >> > >> From: riak-users [mailto:riak-users-boun...@lists.basho.com] On Behalf > Of > >> Qiang Cao > >> Sent: Thursday, March 03, 2016 6:13 PM > >> To: Dave King <djk...@gmail.com> > >> Cc: riak-users <riak-users@lists.basho.com> > >> Subject: Re: Continuous HTTP POSTs to Riak > >> > >> > >> > >> Thanks, Dave! I'm aware of Riak's eventual consistency. I wonder how I > can > >> get Riak work in the way as I need. I'm in a situation where I expect > the > >> immediate GET reads the value I've just posted. And the GET request > isn't > >> sent out until the POST is done. > >> > >> > >> > >> Thanks, > >> > >> -Qiang > >> > >> > >> > >> On Thu, Mar 3, 2016 at 6:53 PM, Dave King <djk...@gmail.com> wrote: > >> > >> You need to google 'Eventual consistency'. > >> > >> > >> > >> - Peace > >> > >> Dave > >> > >> > >> > >> > >> > >> On Thu, Mar 3, 2016 at 4:23 PM, Qiang Cao <caoqiang...@gmail.com> > wrote: > >> > >> Hi All, > >> > >> > >> > >> I use Riak as a KV store and send http requests to its REST API to > update > >> entries. Instead of using curl, I use Apache HttpClient to send > requests. > >> > >> > >> > >> One thing bothering me is that sometimes I find the entry isn't properly > >> updated after an HTTP POST/PUT. For example, if I do an HTTP GET on the > same > >> key immediately after an HTTP POST, the chance is good that I get a > stale > >> value. This happens when I continuously POST to a multi-node Riak, and > some > >> of the posts target the same key. > >> > >> > >> > >> Also, I find I don't have this issue if I use a single-node Riak. So I > >> think something wasn't correct with my multi-node Riak cluster (I set > >> "allow_mult" to false). Any thoughts? > >> > >> > >> > >> Thanks in advance! > >> > >> > >> > >> Qiang > >> > >> > >> > >> _______________________________________________ > >> riak-users mailing list > >> riak-users@lists.basho.com > >> http://lists.basho.com/mailman/listinfo/riak-users_lists.basho.com > >> > >> > >> > >> > >> > >> _______________________________________________ > >> riak-users mailing list > >> riak-users@lists.basho.com > >> http://lists.basho.com/mailman/listinfo/riak-users_lists.basho.com > > > > -- > > Sincerely, > > > > Christopher Mancini > > ----------------------------- > > > > employee = { > > purpose: solve problems with code, > > phone: 7164625591, > > email: cmanc...@basho.com, > > github: http://www.github.com/christophermancini > > } > > > > _______________________________________________ > > riak-users mailing list > > riak-users@lists.basho.com > > http://lists.basho.com/mailman/listinfo/riak-users_lists.basho.com > > >
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