Re: [geomesa-dev] Geomesa Feature Count always returning zero!!!

[Emilio Lahr-Vivaz <elahrvivaz@xxxxxxxx>]

I just tried a count query on a small 6-node cluster i have set up, against a feature type with 20 attributes, and it was generally hitting about 700k entries/second with some sustained peaks around 1.1M entries/second, so your numbers don't seem unreasonable. The speed is usually limited by disk reads - having fewer attributes in your features, having faster disks (SSD), increasing memory and cache size in accumulo will all speed things up.

Thanks,

Emilio

On 04/27/2017 03:24 AM, Suresh Prajapati wrote:

Hi Emilio

I understand the Accumulo as distributed system, though do you think 1 million entries scan should take seconds on single-tablet server?

Thank You

Suresh Prajapati

On Wed, Apr 26, 2017 at 8:37 PM, Emilio Lahr-Vivaz <elahrvivaz@xxxxxxxx> wrote:

Hi Suresh,

If you're running on a single tablet server, then splits are not going to help you. Generally they would be used to spread your data across multiple servers, but in this case that's not possible. Accumulo is really intended as a distributed system - it will work with a single server, but things will be slow. If you're just using that setup for testing, then you can just put up with the slowness and expect a speed-up when you deploy to a cluster. If you never intend to step up to a larger cluster, then you would probably be better served installing something like postgis.

Thanks,

Emilio

On 04/26/2017 10:58 AM, Suresh Prajapati wrote:

Hi Emilio

My "table.split.threshold" value is 1G(default), can that be a problem?. I am running accumulo on one tablet server (including master). Should i reduce split threshold and retry?

Thank You

Suresh Prajapati

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