Can you elaborate what your cluster setup is like? Node specs (disk, RAM, CPU), how many master/data nodes and what version of ES and java you're running?
Regards, Mark Walkom Infrastructure Engineer Campaign Monitor email: [email protected] web: www.campaignmonitor.com On 25 March 2014 16:11, Robin Clarke <[email protected]> wrote: > I did some intensive tests last week on a 20-node cluster and had the > following insights - I'd be interested if anyone has similar/dissimilar > experience. > The had 20 nodes had 8 cores each, and 32GB memory each. I set up > Elasticsearch to have 15GB of that memory. > The sample events I was using were Apache logs (common format) without any > additional fields (no geoip, useragent etc. plugins). > When running as a 20-node cluster, I got a maximum igestion rate of 2500k > events/minute (41k/second), *but* the bottleneck was the logstash CPU > load... so I reduced to a 10 node cluster... > With the 10 nodes I initially had 1600k/minute (27k) and acheived > 1800k/minute (30k/second) by increasing index_refresh_interval to 30s and > index_buffer_size to 20% > Further reducing to 5 nodes, I had 1100k/minute (18k/second). > This brings me to an interesting comparison: at 10 nodes, I have 3k > events/second/node, and with 5 nodes I have 3.66k events/second/node. i.e. > the overhead for doubling the number of nodes from 5 to 10 is about 20%. > Is this to be expected? Just how scalable is Elasticsearch - at what > point is the diminishing return on adding nodes not cost effective? > Is the further logical reduction to 375 events/core/second still > meaningful? > > Cheers, > -Robin- > > -- > 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 [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/elasticsearch/3353dab5-6241-4b41-8845-6c5f8553d488%40googlegroups.com<https://groups.google.com/d/msgid/elasticsearch/3353dab5-6241-4b41-8845-6c5f8553d488%40googlegroups.com?utm_medium=email&utm_source=footer> > . > For more options, visit https://groups.google.com/d/optout. > -- 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 [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/elasticsearch/CAEM624b8a8ZZbOc81g18XZWNz3qYV3gby%3DCtGrPZ8f%2BwiXXYEg%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
