e)), I would use them only if it’s impossible to set up the collocation
between 2 entities. That’s not your case from what I see. NON collocated joins
are slower than collocated ones.
—
Denis
On Sep 1, 2017, at 2:53 PM, Roger Fischer (CW)
<rfis...@brocade.com<mailto:rfis...@brocade.com&
Hi Matt,
are the objects to join collocated, ie. do they have the same affinity key? If
yes, it should work (it worked for me).
If no, you need to enable distributed joins for the query. See the middle line.
SqlFieldsQuery qry = new SqlFieldsQuery( stmt);
Hi Mark,
I recently did a Proof-of-Concept with Ignite and Cassandra. There are a number
of challenges you need to look out for:
1) In order to do SQL queries, you need to have all the data in Ignite. It is
not practical to include other persistence layers in the query process.
The exception
Hello,
I am a bit confused about schemas and cache names. In some cases they seem
synonymous, on others the appear different.
So far I have defined everything in XML configuration. To execute a query, I
get the cache [getOrCreateCache()], and then execute the query statement. When
the
Thanks, Val. I keep an eye on the ticket.
Roger
-Original Message-
From: vkulichenko [mailto:valentin.kuliche...@gmail.com]
Sent: Thursday, August 24, 2017 3:43 PM
To: user@ignite.apache.org
Subject: Re: Cassandra Persistence Store without POJO on Server
Hi Roger,
Currently this is
Hello,
is it possible to use the Cassandra Persistence Store
(libs/optional/ignite-cassandra-store) without the need to deploy the key and
object POJOs on the server?
For basic data grid use, it seems that everything defaults to binary objects.
put(), get() SQL queries, native persistence and
Hello,
how does one define the affinity key in XML?
The documentation describes only the @CacheAffinityKeyMapped annotation.
I have found a couple of examples that define the affinity key in the
cacheKeyConfiguration. For example:
modules/yardstick/config/ignite-bin-multicast-config.xml
Hello,
does Ignite SQL support functions that return a results set, and the use of
those functions in SQL as a table equivalent?
If yes, is there an example?
H2 supports it, see
http://www.h2database.com/html/features.html#user_defined_functions (need to
scroll down a bit).
Thanks...
Roger
Hi Dmitry and Alex,
the cache contains 19.2M objects. The work/db directory is 23, 26 and 22 GB
respectively. The 3 nodes have 8 GB RAM each.
I initiated deactivate at 14:13:39. As of 16:50:00, deactivate has not
completed. Only server node 2 continues to log warnings.
The client shows the
Hi Dmitry,
yes, the data set is bigger than the available memory. I am evaluating native
persistence, specifically SQL queries when pages have to be loaded from disk.
Thus I need a data set that is significantly bigger than what fits the memory.
I made another attempt, loading smaller batches
Aug 12, 2017 at 12:39 AM, Roger Fischer (CW) [via Apache Ignite Users]
<[hidden email]> wrote:
Hello,
I am wondering if the following behavior is typical, or if it represents a
concern.
I have a 3 node cluster with native persistence. Each node as 4 CPU and 16 GB
of RAM.
Each node has ~45
Hello,
I am running into strange problems with Ignite Native Persistence when the data
exceeds the size of the cache (memory).
I have 3 nodes with 8 GB each, one cache, using 1 backup. I am using SQL
queries, and the cache has 3 indexes.
I am loading 9.6M objects, using IgniteDataStreamer in
Hello,
I am wondering if the following behavior is typical, or if it represents a
concern.
I have a 3 node cluster with native persistence. Each node as 4 CPU and 16 GB
of RAM.
Each node has ~45 GB used in work/db. Total across the 3 nodes is about 36.5 M
objects.
I am using SQL queries, and
Hello,
the cache counts that are shown in Visor seem to be twice the number that is
expected.
I am using ver. 2.1.0#20170720-sha1:a6ca5c8a, with native persistence.
For a replicated cache, with 363 objects loaded (select count(*) returns 363):
Nodes for: FabricCache(@c0)
=Um-YJWzYXVumPwMqixM6akpUk4J0hAYBgLfaLalcoio=I27CtlmoY0a0bYf8Iw9GSJrC0Yv0mizq3iIx9oo7TcA=>
Igor
On Thu, Aug 3, 2017 at 2:29 PM, Roger Fischer (CW)
<rfis...@brocade.com<mailto:rfis...@brocade.com>> wrote:
Hello,
could someone please explain to me how loadCache() queries are distributed to
the Cassan
Hello,
could someone please explain to me how loadCache() queries are distributed to
the Cassandra instances when using the Cassandra Cache Store module.
I used Ignite logging and Cassandra server tracing (system_traces.sessions) to
try to determine how queries are distributed, but I can't
Hello,
it turns out that the problem (missing objects) was caused by cluster
configuration issues. Both the Ignite and Cassandra cluster had one node (not
the same VM) configured with a different time zone. Since date-time was part of
the primary key and query parameters, there were
Hi Val,
looking at the debug logs, I see that the query is executed on only one Ignite
server. It seems that this happens when the where clause includes a
partitioning column.
Query " select * from test_11.fc_port_stats; " loads all objects.
Query " select * from test_11.fc_port_stats where sid
Thanks, Val.
I got confused between the Cassandra and Ignite keys. The configuration
(keyPersistence) references the POJO and the Cassandra partition and clustering
key. Thus I inadvertently also added the partitioning key elements to the POJO.
However, this still does not explain my problem.
Thanks, Val.
The two fields are sufficient as the primary key. The "hour" field is the
truncated dateTime, and "bucket" is a grouping of the PortIds.
Roger
-Original Message-
From: vkulichenko [mailto:valentin.kuliche...@gmail.com]
Sent: Thursday, July 27, 2017 2:56 PM
To:
Hello,
what is the best way to efficiently load data from a backing store, like
Cassandra. I am looking for a solution that minimizes work in Ignite and
Cassandra.
As I understand:
The simplest way is to call loadCache() with a single select statement.
cache.loadCache( null, "select * from
Hello,
I am using Ignite with Cassandra, loading data from Cassandra on-demand using
multiple query statements. But only a (seemingly random) subset of the
rows/objects are loaded into ignite.
When I load using a single query, all rows/objects are loaded correctly.
In another environment,
Thanks Val.
The XML config has to include the package, but _not_ the ".class".
Working example:
com.abc.poc.icpoc.function.DateTimeFunctions
Roger
-Original
ass with custom SQL functions via XML just use regular
Spring bean notation
...
Functions1.class
Functions2
...
Kind regards,
Alex.
On Thu, Jul 20, 2017 at 6:31 AM, Roger Fischer (CW) [via Apache Ignite Users]
<[hidden email]&
Hello,
I have a couple of questions on custom SQL functions:
1) Can functions be overloaded, ie. could there be a to_string( Date) and a
to_string( Double) function?
2) If yes, how is the applicable function identified? Based on parameters? Or
does the function need to be qualified with the
Hello,
I am getting the following exceptions from the ignite server(s) when using the
visor cache command:
[10:03:36,710][SEVERE][mgmt-#415%null%][GridJobWorker] Failed to execute job
due to unexpected runtime exception
[jobId=c2fd5a65d51-7f82d6ed-0d7f-4cc9-a312-229ba87c8edd,
Hello,
there seems to be a problem with mapping between Cassandra numerical types to
Java types. I am using ver. 2.0.0#20170430-sha1:d4eef3c6.
In Cassandra, the column is defined as "smallint".
In the Java POJO, the field is defined as "Short"
In the configuration (QueryEntity), the field is
Hello,
all the examples for the Cassandra integration load the persistence settings
from a resource. Here is one such example:
Is it possible to define the persistence settings inline, ie. in the same file
as the cache configuration?
I tried the following:
Hello,
I have seen the page on using Cassandra as the persistent store for Ignite. Are
the same concepts / classes applicable when using Cassandra as the backing
database?
I have a large data set in Cassandra. At system start I want to load the most
recent (ie. most used) data into Ignite.
Hello,
are there any concerns about larg-ish keys, like a UUID?
What if even larger, like a string of variable length?
I am using Ignite SQL.
Some objects have a single primary key, and in most cases it is a UUID. I am
trying to decide if we should
a) create an artificial key (long) and have
Hello,
I am unable to make a connection from a client on Windows to an Ignite server
cluster running on 3 Linux machines. I have checked firewall settings on both.
I am running a 3-node cluster of Ignite (2.0.0) on Centos 7. The nodes are
connected to the same Ethernet switch. The cluster is
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