Then each is queried in parallel. On 30 January 2015 at 11:18, Kevin Burton <[email protected]> wrote:
> I assume you mean hardware threads? What I want to avoid is a > configuration setting. I want all the shards to execute in parallel. Not > totally concerned about the physical hardware mapping as in practice this > will be a few hundred nanoseconds :-P > > On Thursday, January 29, 2015 at 4:09:15 PM UTC-8, Mark Walkom wrote: >> >> Each shard is queried in parallel. >> But if you don't have enough threads to query multiple shards at once, >> then it's not the strict definition of parallel as it has to context switch. >> >> On 30 January 2015 at 11:05, Kevin Burton <[email protected]> wrote: >> >>> Ha. I appreciate the feedback but this doesn't answer my question. >>> >>> Does it query them sequentially or in parallel. >>> >>> Using parallel dispatch can dramatically improve performance so I'm >>> trying to track down how this works. >>> >>> and I'm aware that the documentation was there, but I couldn't find >>> anything where it explains how the client executes requests. >>> >>> I might just have to dive into the source or get on the dev list. >>> >>> On Thursday, January 29, 2015 at 1:58:41 PM UTC-8, Mark Walkom wrote: >>>> >>>> ES queries each applicable shard when processing a query. The docs are >>>> here - http://www.elasticsearch.org/guide/en/elasticsearch/referenc >>>> e/current/index.html >>>> >>>> A lot of your problem depends on your setup. Can you give us an >>>> overview of your setup, both infra and data structure? >>>> >>>> On 30 January 2015 at 07:57, Kevin Burton <[email protected]> wrote: >>>> >>>>> I can't RTFM on this because I can't find the documentation. >>>>> >>>>> It looks like some of our queries are taking about 1 second per index >>>>> shard per index. >>>>> >>>>> However, the drives are still have low utilization. Around 10% ... so >>>>> I'm trying to figure out how to improve performance. My hunch is that I >>>>> can get ES to do parallel dispatch so that it can execute more queries in >>>>> parallel which the SSDs we're using should be able to handle. >>>>> >>>>> -- >>>>> 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/d7088d0d-15fa-4925-a16e-fd7152bfccf1%40goo >>>>> glegroups.com >>>>> <https://groups.google.com/d/msgid/elasticsearch/d7088d0d-15fa-4925-a16e-fd7152bfccf1%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/716f62f0-afe5-4221-a252-b57ad7bf296a% >>> 40googlegroups.com >>> <https://groups.google.com/d/msgid/elasticsearch/716f62f0-afe5-4221-a252-b57ad7bf296a%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/f104c138-1b4d-4aa0-9301-e01f8e95b775%40googlegroups.com > <https://groups.google.com/d/msgid/elasticsearch/f104c138-1b4d-4aa0-9301-e01f8e95b775%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/CAEYi1X9%3DKJX16QmOnCE4jWAPNUAnGF-A70dDNDoUOhdsrqbRqQ%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
