Something that could happen is that with 0 replicas all the data fit into your filesystem cache (so everything is done in memory) while with 1 replica, some filesystem operations are translated to actual disk seeks.
Another different between 0 and 1 replicas is that in the latter case, elasticsearch will wait for the data to be written on 2 shards before returning. When indexing is slow, are you maxing out the CPU and I/O of your machine? If not then maybe you just need to increase the concurrency of indexing requests on client side? On Wed, Nov 5, 2014 at 9:51 AM, 이윤동 <leey...@gmail.com> wrote: > thanks answer! > > when replica 0, index speed fast, > when replica 1, index speed very slow... > > refresh interval same.120s > id lookup is good point. > but we need out id, can't use auto-generated id.. T.T > > and when replica 0 and 1, always id lookup. > > 2014년 11월 5일 수요일 오후 5시 14분 54초 UTC+9, 이윤동 님의 말: > >> hi! my first question! >> >> if replica 0 bulk index, then disk read, write ratio same. >> but batch finish after... disk read is high than write. >> disk read = 10 X disk write... >> >> so cpu load is high, then batch index very slow.. T.T >> >> -- > You received this message because you are subscribed to the Google Groups > "elasticsearch" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to elasticsearch+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/elasticsearch/99a66b9e-2373-49d1-be46-c47c2c76987a%40googlegroups.com > <https://groups.google.com/d/msgid/elasticsearch/99a66b9e-2373-49d1-be46-c47c2c76987a%40googlegroups.com?utm_medium=email&utm_source=footer> > . > > For more options, visit https://groups.google.com/d/optout. > -- Adrien Grand -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to elasticsearch+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/elasticsearch/CAL6Z4j7Ki0k3BNtbLo%3DaRToOJMCtyuBGO3u_%3D6UymNcejjkPwg%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
