Hi,
This is possible in ATOMIC cache, because if the client doesn't receive the
response from the failed node, it doesn't know if the value was removed or
not. It will then get an exception and retry, but if the value was removed
on the first iteration, false will be removed.
Can you try switchin
Hi,
You're storing departments and employees as separate objects, right? If so,
then there is nothing to update in Employee when Department is updated.
After any update, all SQL queries will work on the new data (like in any
database), so if you join two tables, you will get new results.
Makes se
First link in Google:
https://jdbc.postgresql.org/documentation/documentation.html
-Val
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Could you tell more about it ? I cant find information in google about it.
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You can also check out the GridGain Add-on listed here:
https://ignite.apache.org/addons.html#web-console
It will automatically generate all the mapping code between DB and Ignite,
as well as provide the store implementation.
D.
On Fri, Apr 15, 2016 at 4:05 AM, Alexei Scherbakov <
alexey.scherba
You can use IgniteCache.put(key,value) method to store key/value pairs in
cache.
On Fri, Apr 15, 2016 at 11:31 AM, tusharnakra
wrote:
> I think you did not understand my question. I want to add a new value to
> the
> cache, one that is not already present in the database table.
>
> Example:
>
>
The example I provided [1] has this, see line 90. Out of the box Ignite
provides JDBC-based CacheJdbcStoreSessionListener, Spring-based
CacheSpringStoreSessionListener and Hibernate-based
CacheHibernateStoreSessionListener. These three fit majority of cases, but
you're always free to implement your
Val, is there an example of how to use Cache store sessions listeners?
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This means that PGPoolingDataSource class doesn't have 'setUrl' method. Quick
googling showed that they use separate properties like 'serverName',
'portNumber', etc. You should refer to the JDBC driver documentation to find
out how to properly configure it.
-Val
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Hi,
I want to know if there is any way of maintaining relationships between
database tables (stored in caches) in Ignite?
Example:
Department Table has fields : deptid and dept
Employee Table has fields : id, firstname, lastname, deptid
Now, if any change in the Department Table is made (say,
I don;t know why, following error is :
Caused by: class org.apache.ignite.IgniteCheckedException: Failed to
instantiate Spring XML application context
[springUrl=file:/home/tomk/downloads/apache-ignite-fabric-1.5.0.final-bin/bin/../config/turbines_table_cluster-server.xml,
err=Error creating bean w
I think you did not understand my question. I want to add a new value to the
cache, one that is not already present in the database table.
Example:
Right now the cache has the following:
[key=PersonKey [id=2], val=Person [id=2, firstName=Marc, lastName=Robinson,
orgid=300, salary=12000]]
[key=Pe
I think you did not understand my question. How do I add a new value in my
cache (i.e., a new row) which is not already present in the database?
Example:
Person Cache right now, has:
[key=PersonKey [id=2], val=Person [id=2, firstName=Marc, lastName=Robinson,
orgid=300, salary=12000]]
Entry [key
You don't need to create Ignite instance on the server node, it's already
there.
On the client do like this:
Ignition.setClientMode(true);
Ignite ignite = Ignition.start(...);
-Val
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Write-through is done automatically if you enable it. Refer to [1] for more
details.
[1] https://apacheignite.readme.io/docs/persistent-store
-Val
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Sent from the Apache I
How will it complicate it? Ignite's binary format can be easily used for
storing JSON object, there is nothing in JSON that is not supported by this
format. So the flow will be something like this:
1. User wants to store JSON object in the cache.
2. You code parses JSON and uses BinaryObjectBuilde
Hi,
I'm trying to use yoru sql query facility. And I'm doing something like
this:
String sql =
"select orgid from Person where id = ?";
QueryCursor> cursor = cache.query(new
SqlFieldsQuery(sql).setArgs(2));
// In this particular
Could you tell me how do I do the following:
I want to add a new row to the Person cache,which is currently not present
in the Person table. So, first add it to the cache and then write through to
the table. The columns in the Person table are "id, firstName, lastName,
orgid, salary". How do I do
Hi,
IGFS is a Hadoop-compliant distributed file system. If your application can
work with Hadoop file systems, then you can just setup IGFS on top of it
and cache data from Hadoop file system.
If you want to employ a kind of POSIX distributed file system, such as NFS,
IGFS is not able to work with
Hi,
I am not very familiar with ThriftServer unfortunately. You should follow
it's documentation to figure out how to make it use custom file system. As
per IGFS setup please refer to documentation:
https://apacheignite-fs.readme.io/docs/file-system
Vladimir.
On Thu, Apr 14, 2016 at 5:16 PM, to
Vij,
Yes, cache store is normally used when you want to cache as much data from
it as possible. In your case you have two separate data processing modes -
one for hot data with possible caching, and another one for historical
data.
It seems to me that you could just put Ignite cache "near" operati
nopes. It will complicate my json.
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Hi,
I'm attempting to create a distributed locking mechanism using a
distributed cache with the atomic putIfAbsent(key, value) and conditional
remove(key, value) operations.
The cache configuration is as follows:
CacheConfiguration [name=lock_data0, storeConcurrentLoadAllThreshold=5,
rebalancePo
I tried to search there. My problem is, that each my app is in client mode.
Server is runned using ./bin/ignite.sh
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Hi,
I strongly recommend you to start from reading Ignite documentation
http://apacheignite.readme.io
and studiyng examples
https://github.com/apache/ignite/tree/master/examples
If you specifically want to propagates cache updates to relational
database, please check the chapter
https://apachei
I would suggest you start learning Apache Ignite using its examples [1] that
showcase how to start node, organize cluster, use caches, computer, queries,
etc.
[1] https://github.com/apache/ignite/tree/master/examples
—
Denis
> On Apr 15, 2016, at 1:38 PM, tomk wrote:
>
> Ok, I will show this
Ok, I will show this webconsole.
When it comes to flow in my code - could you refert to this issue ?
As you know- for example I don't know where should I create instance of
Ignite class.
PS xmls files allow me totally eleminate configuration cache from java code
?
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Hi, @tomk!
In addition to Denis answer, I would like to suggest to try WebConsole, see
https://ignite.apache.org/addons.html#web-console
Web Console will generate XML and Java code, pom file and many more.
On Fri, Apr 15, 2016 at 5:23 PM, Denis Magda wrote:
> Hi,
>
> Sure, you can configure y
HI Shaomin,
I would suggest making a memory snapshot using Visual VM or a similar tool and
see which objects consumes so much memory.
Make sure to explicitly trigger garbage collection (GC) before making the
snapshot because sometimes GC postpones its job depending on the settings.
If it’s stil
Hi,
Sure, you can configure your caches in Spring xml configuration.
You can refer to this exemplary configuration
https://github.com/apache/ignite/blob/master/examples/config/example-cache.xml
—
Denis
> On Apr 15, 2016, at 12:59 PM, tomk wrote:
>
> Hello,
> In my java code I am using CacheCo
No, I show you my case:
I have a program which get data - in cyclic way. When it receives data I
compute some things and as result I get row.
The row I would like to write-through
All program is packed into jar,
main funcions look like:
main (){
while (true){
row = getNewData ();
c
Hello,
In my java code I am using CacheConfiguration to configure such things as
cache name, data source (jdbc connection).
Is it possible to eleminate this object from java code ? In place of them, I
would like to create setting file (xml).
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Thank you Val.
Another question is that although the reported off-heap memory is not big
(around 72M), I observed big heap memory consumption - some as high as 6G. I am
not using any expiry policy. Is this normal?
Shaomin
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