Ignite Transaction with Locks but not SERIALIZABLE user case.

Hello, I have some operations which does not care about the order, e.g., each operation is to increase the key value by 1 or decrease by 1. So I need a lock to protect each key on read and write. Also I need to put operations in transaction, since ignite will handle the commit and rollback.

Re: JDBC Thin Client with Transactions

On Monday, October 30, 2017, iostream wrote: > So the transactional guarantees apply only to cache.get() and cache.put() > category of APIs? > > Yes > What about SqlFieldsQuery? Does it also support transactional > commits/rollbacks? > > SQL fields queries fall in the

Re: JDBC Thin Client with Transactions

So the transactional guarantees apply only to cache.get() and cache.put() category of APIs? What about SqlFieldsQuery? Does it also support transactional commits/rollbacks? -- Sent from: http://apache-ignite-users.70518.x6.nabble.com/

Re: Ignite 2.0.0 GridUnsafe unmonitor

Denis, We should definitely print out a thorough warning if HashMap is passed into a bulk method (instead of SortedMap). However, we should make sure that we only print that warning once and not ever time the API is called. Can you please file a ticket for 2.4? D. On Thu, Oct 26, 2017 at 11:05

Node failed to startup due to deadlock

Hi All, We are seeing deadlocks, causing a node failed to start for the below scenario: 1) Two nodes (Node 1 & Node 2) are started-up at the same time. 2) Once the caches are loaded and ready, bring down one node (Node 2). 3) With in a brief duration (~minute time), start again the node (Node 2)

Re: Threads waiting on cache reads

Thanks Alexey. Yes that was it. I wish the documentation had these details. -- Sent from: http://apache-ignite-users.70518.x6.nabble.com/

Re: Exception in calculating cache size

Thanks much Andrey & Dmitry, the solution is working. -- Sent from: http://apache-ignite-users.70518.x6.nabble.com/

Re: Gain Deep Insights with GA Grid for Ignite and Zeppelin!

Denis, Sure. No problem. Is it possible to reference the article that I have published on LinkedIn here?: https://www.linkedin.com/pulse/apache-ignite-visualize-ga-grid-solutions-deep-turik-campbell/ Please advise. Best, Turik -- Sent from:

Quick questions on replication and write synchronization mode

Hi, 1. Assume I write data item X with a FULL_ASYNC write synchronization mode, what happens if I immediately attempt to read X? Will I read an old value or do I wait till the previous writes are completed? 2. If the write mode is PRIMARY_ASYNC, will the immediate read operations on X get

Re: Estimation of cluster effective capacity

Hi, It is very rough estimations. 1. Recommended minimal heap size for server node is 512Mb. If you plan to retrieve large dataset with getAll or some queries with large page size, you should bother with requested data will fit in memory. Also JVM GarbageCollector feels much better if there is

Re: Gain Deep Insights with GA Grid for Ignite and Zeppelin!

Hi Turik, Happy to see you keep developing the component! Thanks for giving an update on this. Could you write a blog post about Zeppelin usage? You can use your personal blog and we will add a reference to a post to this page: https://ignite.apache.org/blogs.html — Denis > On Oct 29, 2017,

Re: How can I get Ignite security plugin to work with JDBC thin client?

Hi, IgniteCache.query() method requires CACHE_READ permission, but looks like all JDBC clients bypass security checks. On Mon, Oct 30, 2017 at 5:27 PM, calebs wrote: > Hi Andrew, > > Then, does JDBC "thick" client have the support security plugin? The > security includes

Modify the underlying IgniteRDD Cache

Hi, I am trying to work with and modify the underlying cache of a RDD, however, I can not seem to access any values or iterate through it. The premise behind the algorithm is there is no good way to do this in an RDD fashion as each row operation modifys multiple row values. I can do this on the

Re: Ignite 2.3 - replicated cache lost data after restart cluster nodes with persistence enabled

Hi, I've created issue for this case: https://issues.apache.org/jira/browse/IGNITE-6792 Reproducer is attached to JIRA, also test was added into branch. According to my brief testing, cache.size() method also returns less count than initial load. Sincerely, Dmitriy Pavlov пт, 27 окт. 2017 г. в

Re: Renentrant Lock & deadlock

Hi Rajiv, Seems, it is same issue as IGNITE-6380. I see tread blocks on dynamic cache for ignite datastructures creation. [1] https://issues.apache.org/jira/browse/IGNITE-6380 On Sat, Oct 28, 2017 at 12:15 AM, rajivgandhi wrote: > Hi, > In line with a deadlock

Re: How can I get Ignite security plugin to work with JDBC thin client?

Hi Andrew, Then, does JDBC "thick" client have the support security plugin? The security includes User Authentication and Authorization. In GridCacheContext, I see the following method /** * @param op Operation to check. * @throws SecurityException If security check failed.

Re: Exception in calculating cache size

Dmitry, Yes, you are right. we should broadcast a job with local scan queries. On Mon, Oct 30, 2017 at 4:54 PM, Dmitry Pavlov wrote: > Hi Andrey, should we limit scan query to be executed only for current node > here with setLocal() method? > > > пн, 30 окт. 2017 г. в

Re: Exception in calculating cache size

Hi Andrey, should we limit scan query to be executed only for current node here with setLocal() method? пн, 30 окт. 2017 г. в 16:48, Andrey Mashenkov : > As a workaround you can try to broadcast a task : > > Collection res = >

Re: Exception in calculating cache size

As a workaround you can try to broadcast a task : Collection res = ignite.compute(ignite.cluster().forCacheNodes("mycache")).broadcast( new IgniteCallable() { /** Auto-inject ignite instance. */ @IgniteInstanceResource private

Re: Exception in calculating cache size

Hi, This is known bug that transformer applies only to first page of results. Here is a ticket [1] [1] https://issues.apache.org/jira/browse/IGNITE-5804 On Sat, Oct 28, 2017 at 8:57 AM, naresh.goty wrote: > Hi All, > > We are seeing an issue with calculating size of

Re: How can I get Ignite security plugin to work with JDBC thin client?

Hi Caleb, JDBC thin client have no support security plugin for now. If you don't need full permissions support for sql objects (i mean "GRANT" operation), but just restrict unauthorized access to grid, then you can wait for IGNITE-6625 [1] and try JDBC via SSL. [1]

Re: Native persistence and upgrading

Hi, Ignite will be able to read data. Community decided to maintain backward compatibilty of persistent store at least for minor versions. Also there are several tests checking this compatiblity. Sincerely, Dmitriy Pavlov пн, 30 окт. 2017 г. в 14:49, Paulus de B.

Native persistence and upgrading

Hi, does anyone know if e.g. version 2.3 will be able to read 2.2 persisted data (Ignite native persistence)? Will this be true for future releases as well? -- Sent from: http://apache-ignite-users.70518.x6.nabble.com/

Re: Retrieving keys very slow from a partitioned, no backup, no replicated cache

Hi Anand, Can you share your CacheStore implementation? Do you use CacheStoreAdapter<>? Very probably you don't have your own "CacheStore.writeAll()" implementation that is used for batches. And the default one is used (it just sequentially calls "CacheStore.write()" for all entries in a batch).

Estimation of cluster effective capacity

Dear support team, I am trying to estimate memory efficiently available for cache payload in cluster. I base my calculation on https://apacheignite.readme.io/docs/capacity-planning. Can you please confirm that the following formula gives rough but realistic estimation of memory available for

Re: Query performance against table with/out backup

Hi blackfield, I can't reproduce the issue with changing number of backups when cache was re-created. On Fri, Oct 27, 2017 at 8:45 PM, blackfield wrote: > @Andrew Mashenkov, I notice that you opened IGNITE-6781. > However, I actually destroyed the original cache

Re: OBDC Ignite driver error in MS Excel: ODBC version is not supported

Igor, thank you for assistance in clarifying this issue. It really seems to be specific to configuration of Excel ODBC connections rather than specifically Ignite ODBC driver. -- Sent from: http://apache-ignite-users.70518.x6.nabble.com/

Re: Incorrect map query built when joining with a subquery with group by statement

Thank you for your response, I will look further into the problem and see if I can find any workarounds. -- Sent from: http://apache-ignite-users.70518.x6.nabble.com/

Re: Threads waiting on cache reads

Could you put the cache configuration and the sample code? -- Sent from: http://apache-ignite-users.70518.x6.nabble.com/

Failed to create string representation of binary object.

Hi, After few days (2/3) of load testing I am getting below exceptions:- [04:20:06,294][ERROR][sys-stripe-3-#4%LoginServices%][GridCacheIoManager] Failed processing message [senderId=b2df236f-4fba-4794-b0e4-4e040581ba9d, msg=GridNearAtomicSingleUpdateRequest [key=KeyCacheObjectImpl [part=243,

Failed to create string representation of binary object after few days of run.

Hi Folks, Under load testing after few days (2/3) days of run I am getting below exception:- org.apache.ignite.IgniteException: Failed to create string representation of binary object. at