Maybe someone from Basho could shed some light on that issue? Regards Daniel
On 12 March 2013 11:55, Daniel Iwan <iwan.dan...@gmail.com> wrote: > Just to add to that. > Further test shows that 2i searches aso suffer form the problem of not > showing all results durring active vnode transfer. > Is this a known issue with Riak 1.2.1? Has it been solved in 1.3? > > Anyone else experienced that? I guess attaching a node would trigger that > as well, maybe in less severe way. > Also I've read somewhere that you should attach one node at a time to Riak > cluster, and wait until vnode transfer completes. > I think it's no longer true in 1.2 since you have a plan that you commit, > but attaching a node and shuffling vnodes will cause problem described > > What is the solution here? Waiting until vnode transfer finishes is not > acceptable (availability) and recent findings show it may take a while on > big clusters. > > Regards > Daniel > > > > On 11 March 2013 23:06, Daniel Iwan <iwan.dan...@gmail.com> wrote: > >> I'm aware that listing keys is not for production. >> I'm using it mainly during testing, which started to be unreliable after >> changes described above. >> >> What I was not expecting at all was that some of the keys won't be listed. >> I'm not sure if that is stated in documentation to tell the truth. >> To me it looks like it should be called 'listSomeKeys' >> >> About alternatives. >> Some time ago I did comparison of listing and 2i and MapReduce and >> surprisingly listing was quickest. >> I'm not sure why it was happening. I did similar tests today and what I >> got is: >> >> 1000 keys, grouped with 2i into 10 equal groups, each value < 1kB >> Listing: >> - via listkeys 276ms >> - via keyindex $key: 255ms >> - via 2i (10 calls), total 2480ms >> >> So for that simple case 2i is 10 times slower. >> Further test shows that 100k keys (100 groups, 1000 each) gives query >> response between 250-5500ms. >> Not good. It's almost silly NOT to use listing keys. >> >> I may need to do that test on different hardware to compare. At the >> moment I'm using just one 7200rpm HDD for Riak db. >> >> Daniel >> >> >
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