Does Apache Ignite is suitable for real time notifications in a distributed project?

Hello, I am developing a messaging system with notifications via WebSockets (When the user 'A' sends a message to the user 'B' I need to show a notification for the user 'B' about a new message). Different users are connected to different servers. I wonder to know if Apache Ignite is suitable for

Re: grid name in ignite configuration file

Thank you Val. this is really helpful. On 20 October 2016 at 23:32, vkulichenko wrote: > Hi, > > This is the name of local Ignite instance within current JVM. This allows > you to start several nodes within one JVM and access different instances > within one

Re: Re: Some problems in test case which comparing sql query performance between Ignite and Oracle

Hi Warm-hearted person， Thanks for your help. According to your advice, I will query some field not using select *. I will add the index in the cache. To Vladislav Pyatkov, In previous mail, you said "you are always can copy data to another cache (with index) and drop this",

Re: grid name in ignite configuration file

Hi, This is the name of local Ignite instance within current JVM. This allows you to start several nodes within one JVM and access different instances within one application using Ignition.ignite(name) method. If you always have single node per JVM, you should just use default (null) name

Re: Factory Builder For Persistent Store

Hi Labard, You can create your own Factory implementation and create the store in any way you want within this implementation. -Val -- View this message in context: http://apache-ignite-users.70518.x6.nabble.com/Factory-Builder-For-Persistent-Store-tp8382p8387.html Sent from the Apache

Re: Killing jobs on cluster: safe? allowed?

Hi Dan, When a job is cancelled, the thread running it is interrupted. So all these rules are applied in the same way. -Val -- View this message in context: http://apache-ignite-users.70518.x6.nabble.com/Killing-jobs-on-cluster-safe-allowed-tp8385p8386.html Sent from the Apache Ignite Users

Killing jobs on cluster: safe? allowed?

Hi group: Are compute jobs submitted to ignite subject to the same restrictions as Thread with respect to killing running processes? For example, killing threads via API, (e.g., .stop()) are not allowed in Java, you have to code special conditionals into the thread to stop it cleanly, but does

Re: Docker Image mentioned in your site is marked depricated

Hi Piali, Please properly subscribe to the mailing list so that the community can receive email notifications for your messages. To subscribe, send empty email to user-subscr...@ignite.apache.org and follow simple instructions in the reply. piali wrote > Can you please let me know that what is

Re: ClassCastException while fetching data from IgniteCache (with custom persistent store)

This looks like a class loading issue. Do you have peer class loading enabled? Are you running within an application server or other environment with multiple class loaders? I recommend to set a breakpoint inside the get() method and check why there are classes loaded by different class loaders.

Factory Builder For Persistent Store

Hello. I want to make Persistent Store for my Cache. But my implementation of CacheStoreAdapter should get some parameters(dbName,Table,ConnectionProperties) in constructor. And FactoryBuilder which I use in ignite config file want no-args constructor. What should I do? Labard -- View this

Re: What is the purpose of command "cache stop"

This command completely destroys the cache with all its data. Can you clarify what you mean by "release" here? -Val -- View this message in context: http://apache-ignite-users.70518.x6.nabble.com/What-is-the-purpose-of-command-cache-stop-tp8378p8381.html Sent from the Apache Ignite Users

grid name in ignite configuration file

Hello, is there any significance to grid name in ignite configuration file. 1. URL resource = CacheManager.class.getResource("/ignite.xml"); Ignition.start(resource); Ignite ignite = Ignition.ignite("my-grid"); 2. Connection conn =

What is the purpose of command "cache stop"

I want to release the cache space by command in tool ignitevisorcmd. I tried to the command "cache stop", after I inputted the command , I could not find the cache, but the cache space seems not be released. What is the purpose of command "cache stop"? -- View this message in context:

ClassCastException while fetching data from IgniteCache (with custom persistent store)

hi, i am getting ClassCastException while fetching data from IgniteCache. below is the code fragment: CacheConfiguration cacheCfg = new CacheConfiguration(CACHE_NAME); ... IgniteCache cache =

Re: Couchbase as persistent store

I've checked the command you provided. It works, though it really does not add any objects to DB. However, I've added some prints to TestTableStore#writeAll() and I can see that all 100 entires are passed to it to be written. It seems that there is some issue with your implementation of this

Re: Some problems in test case which comparing sql query performance between Ignite and Oracle

Bob, can you please also tell what is your benchmark scenario? Do you have enough warm-up cycles to bring your app to some steady state? --Yakov 2016-10-20 12:40 GMT+03:00 Vladislav Pyatkov : > Hi Bob, > > One way to do SQL faster this is adding indexes. > 1) I do not

Re: Some problems in test case which comparing sql query performance between Ignite and Oracle

Hi Bob, One way to do SQL faster this is adding indexes. 1) I do not think what the estimation will be a lot improve without index. Because of the need to serialize, deserialize and move in network data. 2) Ignite does not create index on existing data, but you are always can copy data to

Re: Some problems in test case which comparing sql query performance between Ignite and Oracle

Bob, 1) Did you create index on Ignite cache? 2) Could you attach you cluster and cache configs? I also agree with Jörn Franke, that such simple query (no joins, simple "where condition") is not very suitable for benchmarking (unless all in your app you are using such queries a lot). --

Re: GUI based SQL Client for Apache Ignite

Thanks Shamim. Information provided was very useful. I was able to query the cache using DBeaver. - Ganesh -- View this message in context: http://apache-ignite-users.70518.x6.nabble.com/GUI-based-SQL-Client-for-Apache-Ignite-tp8283p8372.html Sent from the Apache Ignite Users mailing list

Re: Some problems in test case which comparing sql query performance between Ignite and Oracle

You have to understand for what the database cache is good: lookups of single/few rows. This is due to the data structure of a cache. In this sense you use the cache wrongly. Aside of this I think select * is really the worst way to do professional performance evaluation of your architecture.

Some problems in test case which comparing sql query performance between Ignite and Oracle

Hi, everyone My test environment: Ignite cluster has 8 nodes, every node has 8 cores CPU and 30G memory. Their network has 1000M speed. Oracle is deployed in the machine which has 32G memory and 8 cores CPU. My db table has 47535542 rows with 99 columns. When no index, the