Not sure how to check the GC log, but here's a minimal complete example using
two java classes:
Try these two queries.
SELECT COUNT(DISTINCT((idnumber,value))) FROM athing
SELECT COUNT (*) FROM (SELECT COUNT(*) FROM athing GROUP BY idnumber,value)
Both queries do the same thing, you'll find
Unfortunately, at this stage in dev, I'm only doing runs on one machine, and
though I am using partitioned data to do query parallelism, it seems I lose
that in the GROUP BY. Does GROUP_BY distribute at all?
Might a spark layer on top give a better distribution path?
Mike
Oh, also, during the difference in time, only 1-2 cores seem to be involved.
Mike
From: Williams, Michael
Sent: Monday, February 26, 2018 9:40 AM
To: user@ignite.apache.org
Subject: Slow Group-By
All,
Any advice on speeding up group-by? I'm getting great performance before the
group-by clause
All,
Any advice on speeding up group-by? I'm getting great performance before the
group-by clause (on a fairly decent size data set) , but adding it slows things
down horribly. Without the group-by clause, the query takes about a minute, and
all cores are fully in use. With the group-by cores,
Ah, thanks!
From: Alexey Kukushkin [mailto:kukushkinale...@gmail.com]
Sent: Friday, February 16, 2018 5:40 AM
To: user@ignite.apache.org
Subject: Re: Affinity Key Annotation
Michael, data colocation work like this:
* Ignite caches have partitions assignments so that primary partitions with
Imagine, for example, I have four keys:
Public class ThingOneKey
{
@QuerySqlField
@AffinityKeyMapped
int recordNo;
...
}
Public class ThingTwoKey
{
@QuerySqlField
@AffinityKeyMapped
int recordNo;
@QuerySqlField
Date
Assume I have 4 integers tagged with @AffinityKeyMapped in different data
structures. How does Ignite determine which correspond to affinity pairs? EG,
if I wanted two pairs that have a mutual affinity, how would ignite know which
to pair, or would all be paired together?
Thanks,
Mike
What changes do I need to do to make ZeroDeploy work with QuerySqlFunction
definitions? I'm following the example and adding the class as follows, but
even with peer class loading enabled, I get a gnarly error. Can clients marshal
to servers? Any advice?
import
Yep, all set. Sorry. Getting better at this, honestly.
-Original Message-
From: vkulichenko [mailto:valentin.kuliche...@gmail.com]
Sent: Tuesday, February 13, 2018 6:07 PM
To: user@ignite.apache.org
Subject: Re: Dates before epoch - java.sql.Date
Mike,
Looks like you already have a
If I need to store dates before the Unix epoch, should I use timestamp, as
java.sql.Date doesn't store anything before 1970? Do date functions support
timestamp as well as date?
See: https://docs.oracle.com/javase/7/docs/api/java/sql/Date.html
See also:
Nevermind, I made an error, works fine.
Mike
From: Williams, Michael
Sent: Tuesday, February 13, 2018 3:24 PM
To: user@ignite.apache.org
Subject: Dates before epoch - java.sql.Date
If I need to store dates before the Unix epoch, should I use timestamp, as
java.sql.Date doesn't store anything
Rpltax56uFYU6n57c3GFvMdyEV-dz2ez2lZZpYl0=66Y7rAlRA_17xECa5FjIVnychzFgOU57cX95e0xK8Uw=QhZ2-mbmH1uyk6d0ECo3A_ghgTh1iNv1YQUGMYYx_NY=>
On Fri, Feb 9, 2018 at 2:56 PM, Williams, Michael
<michael.willi...@transamerica.com<mailto:michael.willi...@transamerica.com>>
wrote:
Is it possible
FaQ=9g4MJkl2VjLjS6R4ei18BA=ipRRuqPnuP3BWnXGSOR_sLoARpltax56uFYU6n57c3GFvMdyEV-dz2ez2lZZpYl0=Nrv7gL0zYS9bFUir2zKHmI30_jJzYTzlic8Vk0kWonQ=UZWx1Uz419uytrzu-xRfSiuRqc3rszCQr5rJqNjT8TI=>
The cache name is used for IgniteCache APIs and other related methods.
—
Denis
On Feb 8, 2018, at 3:48 PM, Wil
Hi,
Quick question, submitted a ticket earlier. How would I modify the below code
such that, when viewed through Sql (dbeaver, eg) it behaves as if it had been
created through a CREATE TABLE statement, where the name of the table was
catCache? I'm trying to directly populate a series of tables
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