Hi, I submitted a new JIRA for this: https://issues.apache.org/jira/browse/SOLR-5092
A (very initial) patch is already attached. Reviews are very welcome. On Sun, Jul 28, 2013 at 4:50 PM, Erick Erickson <erickerick...@gmail.com>wrote: > You'd probably start in CloudSolrServer in SolrJ code, > as far as I know that's where the request is sent out. > > I'd think that would be better than changing Solr itself > since if you found that this was useful you wouldn't > be patching your Solr release, just keeping your client > up to date. > > Best > Erick > > On Sat, Jul 27, 2013 at 7:28 PM, Isaac Hebsh <isaac.he...@gmail.com> > wrote: > > Shawn, thank you for the tips. > > I know the significant cons of virtualization, but I don't want to move > > this thread into a virtualization pros/cons in the Solr(Cloud) case. > > > > I've just asked what is the minimal code change should be made, in order > to > > examine whether this is a possible solution or not.. :) > > > > > > On Sun, Jul 28, 2013 at 1:06 AM, Shawn Heisey <s...@elyograg.org> wrote: > > > >> On 7/27/2013 3:33 PM, Isaac Hebsh wrote: > >> > I have about 40 shards. repFactor=2. > >> > The cause of slower shards is very interesting, and this is the main > >> > approach we took. > >> > Note that in every query, it is another shard which is the slowest. In > >> 20% > >> > of the queries, the slowest shard takes about 4 times more than the > >> average > >> > shard qtime. > >> > While continuing investigation, remember it might be the > virtualization / > >> > storage-access / network / gc /..., so I thought that reducing the > effect > >> > of the slow shards might be a good (temporary or permanent) solution. > >> > >> Virtualization is not the best approach for Solr. Assuming you're > >> dealing with your own hardware and not something based in the cloud like > >> Amazon, you can get better results by running on bare metal and having > >> multiple shards per host. > >> > >> Garbage collection is a very likely source of this problem. > >> > >> http://wiki.apache.org/solr/SolrPerformanceProblems#GC_pause_problems > >> > >> > I thought it should be an almost trivial code change (for proving the > >> > concept). Isn't it? > >> > >> I have no idea what you're saying/asking here. Can you clarify? > >> > >> It seems to me that sending requests to all replicas would just increase > >> the overall load on the cluster, with no real benefit. > >> > >> Thanks, > >> Shawn > >> > >> >
