Hi Peter, Tatham has created a new thread in this regards ".Net client for Neo4j", We have CI Build server as he mentions and code is always up to date.
Source Code http://hg.readify.net/neo4jclient NuGet (Package Installer) http://nuget.org/List/Packages/Neo4jClient Cheers -----Original Message----- From: user-boun...@lists.neo4j.org [mailto:user-boun...@lists.neo4j.org] On Behalf Of Peter Neubauer Sent: Tuesday, 27 September 2011 2:19 AM To: Neo4j user discussions Cc: Tatham Oddie Subject: Re: [Neo4j] Turning Off or Configuring log rotation Very cool, glad to hear things work out. Got any code for the .NET bindings? I think we should start pulling client libraries into our build system, so there are stable versions of the most used clients for Neo4j available as part of the QA process. WDYT? Cheers, /peter neubauer GTalk: neubauer.peter Skype peter.neubauer Phone +46 704 106975 LinkedIn http://www.linkedin.com/in/neubauer Twitter http://twitter.com/peterneubauer http://www.neo4j.org - Your high performance graph database. http://startupbootcamp.org/ - Öresund - Innovation happens HERE. http://www.thoughtmade.com - Scandinavia's coolest Bring-a-Thing party. On Mon, Sep 26, 2011 at 1:24 PM, Romiko Derbynew <romiko.derby...@readify.net> wrote: > Hi Peter, > > Indeed our desired result is now achieved. Tatham added batching to our .net > client as well. We are more than happy to assist with HA as this is one of > the last hurdles we need to overcome. If you can let us know in advance when > the release is scheduled then we will incorporate it into our sprint for HA > featuring. > > Much appreciated and thx for 1.5 release, could not have timed it better. > > Sent from my iPhone > > On 26/09/2011, at 5:33 PM, "Peter Neubauer" > <peter.neuba...@neotechnology.com> wrote: > >> Romiko, >> soudns good. Is this solving your current problems or is there stuff >> left to take care of for the moment? Also, there will be some code >> coming out on deploying Neo4j HA on Azure. Would you be interested in >> trying that out and maybe take it a bit further? >> >> Cheers, >> >> /peter neubauer >> >> GTalk: neubauer.peter >> Skype peter.neubauer >> Phone +46 704 106975 >> LinkedIn http://www.linkedin.com/in/neubauer >> Twitter http://twitter.com/peterneubauer >> >> http://www.neo4j.org - Your high performance graph database. >> http://startupbootcamp.org/ - Öresund - Innovation happens HERE. >> http://www.thoughtmade.com - Scandinavia's coolest Bring-a-Thing party. >> >> >> >> On Mon, Sep 26, 2011 at 4:16 AM, Romiko Derbynew >> <romiko.derby...@readify.net> wrote: >>> Hi Guys, >>> >>> We managed to fix the performance issue. >>> >>> * Used Paramterised Queries - increased performance by 1 extra node >>> per second, reduced frequency usage of heap thus no jvm memory >>> errors >>> * Configured our .Net client to use 70 threads for rest calls (I chose this >>> number as Neo4j reserves 80, so I decided 70) 5 TIMES INCREASE IN >>> PERFORMANCE!!!! >>> >>> >>> We are now going to implement the batching to improve performance >>> even more :) >>> >>> I have updated the blog post with these findings. >>> http://romikoderbynew.com/2011/09/23/neo4j-java-jvm-garbage-collecti >>> on-profilingheap-sizelog-rotationlucene-rest-api-performance-analysi >>> s/ >>> >>> >>> I will write a separate post on the improvements from the batching. >>> >>> MyStory Welcome, Temporary from MyStory Administration. Logout? >>> Agency Import Job 301 >>> >>> Log output: >>> >>> [01:44:58] [Thread 10] Migration message received at: 26/09/2011 >>> 1:44:58 AM +00:00 >>> >>> [01:44:59] [Thread 10] Migration message payload: JobUniqueId: >>> 301, AgencyUniqueId: 201 >>> >>> [01:44:59] [Thread 10] Executing sql script: >>> e:\AzureTemp\Resources\4bb24cfd-0b35-4c91-83de-97f335159a49\temp\tem >>> p\RoleTemp\634526342992784034\output.sql >>> >>> [01:45:01] [Thread 10] Processing script command line 10000/37620 >>> >>> [01:45:03] [Thread 10] Processing script command line 20000/37620 >>> >>> [01:45:05] [Thread 10] Processing script command line 30000/37620 >>> >>> [01:45:06] [Thread 10] All sql script commands executed >>> 37620/37620 >>> >>> [01:45:13] [Thread 10] Importing 37619 clients into the database >>> >>> [01:45:44] [Thread 12] Processed 169/37619 clients, 5.62 clients >>> per second, 01:51:06 remaining >>> >>> [01:46:16] [Thread 29] Processed 360/37619 clients, 5.80 clients >>> per second, 01:47:02 remaining >>> >>> [01:46:29] [Thread 69] Processed 1000/37619 clients, 13.30 clients >>> per second, 00:45:52 remaining >>> >>> [01:46:50] [Thread 28] Processed 2000/37619 clients, 20.78 clients >>> per second, 00:28:34 remaining >>> >>> [01:47:11] [Thread 30] Processed 3000/37619 clients, 25.47 clients >>> per second, 00:22:39 remaining >>> >>> [01:47:33] [Thread 32] Processed 4000/37619 clients, 28.71 clients >>> per second, 00:19:31 remaining >>> >>> [01:47:55] [Thread 76] Processed 5000/37619 clients, 30.95 clients >>> per second, 00:17:33 remaining >>> >>> [01:48:18] [Thread 87] Processed 6000/37619 clients, 32.52 clients >>> per second, 00:16:12 remaining >>> >>> [01:48:46] [Thread 13] Processed 7000/37619 clients, 32.95 clients >>> per second, 00:15:29 remaining >>> >>> [01:49:10] [Thread 70] Processed 8000/37619 clients, 33.84 clients >>> per second, 00:14:35 remaining >>> >>> [01:49:36] [Thread 54] Processed 9000/37619 clients, 34.25 clients >>> per second, 00:13:55 remaining 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>>> >>> [02:10:04] [Thread 12] Processed 37287/37619 clients, 25.01 >>> clients per second, 00:00:13 remaining >>> >>> [02:10:27] [Thread 10] All 37619 clients imported >>> >>> >>> -----Original Message----- >>> From: user-boun...@lists.neo4j.org >>> [mailto:user-boun...@lists.neo4j.org] On Behalf Of Romiko Derbynew >>> Sent: Friday, 23 September 2011 1:06 PM >>> To: Neo4j user discussions >>> Cc: Tatham Oddie >>> Subject: Re: [Neo4j] Turning Off or Configuring log rotation >>> >>> Apologise. >>> Issue Number: https://github.com/neo4j/community/issues/28 >>> Blog: http://bit.ly/r9hBZC >>> >>> Cheers >>> >>> -----Original Message----- >>> From: user-boun...@lists.neo4j.org >>> [mailto:user-boun...@lists.neo4j.org] On Behalf Of Romiko Derbynew >>> Sent: Friday, 23 September 2011 12:52 PM >>> To: Neo4j user discussions >>> Cc: Tatham Oddie >>> Subject: Re: [Neo4j] Turning Off or Configuring log rotation >>> >>> Hi Peter, >>> >>> We solved the issue by disable index creations when importing 1000's of >>> nodes. So we will need to figure out why Lucene Index creations via the >>> rest api causes so much instability. Below is the history of work done. I >>> have also published a blog report on this here: >>> >>> >>> I have created an issue with this email as the content. Issue number >>> is: INSERT ISSUE NUMBER http://bit.ly/r9hBZC >>> >>> >>> Also the circuit breaker did not get triggered at all, which means the REST >>> API is responding with 100% uptime when just doing the insert >>> nodes/relationships. I guess we then have a performance issue with the >>> Lucene side. I am more than willing to try collect information on this for >>> you, if I enable FINEST log setting, will we be able to get details from >>> neo4j about the lucene issue and why it causes such problems? >>> >>> >>> Troubleshoot log: >>> >>> I managed to disable the tx logging via the console in the emebedded web >>> server, and then ran an import. >>> >>> * Each Node that gets inserted - does a query, insert node, insert >>> index entries >>> * At around 3000 node mark, the rest api became unresponsive >>> >>> I have optimised the JVM by: >>> Increases stack size to 2048k >>> Increase Heap size to 512m -> 1024m >>> Set JVM to Server Mode >>> The GC is now optimized (In GCViewer, very few second generaton collections >>> occur) Optmised the Gremlin code in the neo4jClient to used paramterised >>> queries. >>> Reduced the number concurrent threads from the .net application to 10 >>> instead of unlimited to the rest api. >>> Disabled LUCENE Indexes >>> >>> So with all the optimisation techniques from the performance guide being >>> followed, we still get a slow response. So I guess this is not the flush to >>> disk, as I notice my disk is very fast (SSD) and the %disk time and queue >>> length is very low. >>> >>> Primary Cause Of Performance Issue >>> Now, with the Lucene Index Calls via rest turned off, it is running >>> much faster!! :) >>> >>> So the issue for us was all the Lucene Index rest Api calls. I guess this >>> is the case as for each node we need to add +- 4-8 per node. This means, if >>> we can reduce lucene index calls as Tatham logged by parsing a dictionary >>> of key values in a json post, then we can reduce 4-8 rest calls to 1 call. >>> >>> So to CONFIRM, the REST API is STABLE when not creating the indexes >>> for each node we create. Note all the calls are multithreaded. See >>> below >>> >>> Log output: >>> MyStory Welcome, Temporary from MyStory Administration. Logout? >>> Agency Import Job 281 >>> >>> Log output: >>> >>> [02:07:36] [Thread 11] Migration message received at: 23/09/2011 >>> 2:07:36 AM +00:00 >>> >>> [02:07:36] [Thread 11] Migration message payload: JobUniqueId: 281, >>> AgencyUniqueId: 181 >>> >>> [02:07:37] [Thread 11] Executing sql script: >>> e:\AzureTemp\Resources\483c6036-8050-4387-a806-6e880d655b58\temp\tem >>> p\RoleTemp\634523764566141006\output.sql >>> >>> [02:07:39] [Thread 11] Processing script command line 10000/37620 >>> >>> [02:07:40] [Thread 11] Processing script command line 20000/37620 >>> >>> [02:07:42] [Thread 11] Processing script command line 30000/37620 >>> >>> [02:07:43] [Thread 11] All sql script commands executed 37620/37620 >>> >>> [02:07:51] [Thread 11] Importing 37619 clients into the database >>> >>> [02:08:22] [Thread 18] Processed 146/37619 clients, 4.72 clients >>> per second, 02:12:25 remaining >>> >>> [02:08:53] [Thread 35] Processed 302/37619 clients, 4.87 clients >>> per second, 02:07:43 remaining >>> >>> [02:09:24] [Thread 82] Processed 457/37619 clients, 4.92 clients >>> per second, 02:05:58 remaining >>> >>> [02:09:58] [Thread 55] Processed 624/37619 clients, 4.93 clients >>> per second, 02:05:02 remaining >>> >>> [02:10:29] [Thread 66] Processed 779/37619 clients, 4.93 clients >>> per second, 02:04:32 remaining >>> >>> [02:11:01] [Thread 36] Processed 933/37619 clients, 4.92 clients >>> per second, 02:04:12 remaining >>> >>> [02:11:13] [Thread 35] Processed 1000/37619 clients, 4.95 clients >>> per second, 02:03:21 remaining >>> >>> [02:11:14] [Thread 40] Processed 1000/37619 clients, 4.95 clients >>> per second, 02:03:21 remaining >>> >>> [02:11:48] [Thread 13] Processed 1147/37619 clients, 4.84 clients >>> per second, 02:05:40 remaining >>> >>> [02:12:21] [Thread 9] Processed 1291/37619 clients, 4.78 clients >>> per second, 02:06:40 remaining >>> >>> [02:12:52] [Thread 79] Processed 1437/37619 clients, 4.77 clients >>> per second, 02:06:24 remaining >>> >>> 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Neo4j user discussions >>> Cc: Tatham Oddie >>> Subject: Re: [Neo4j] Turning Off or Configuring log rotation >>> >>> Hi Peter, >>> >>> Thank you so much for the tips, will look into this today and see >>> what I can come up with. After my musings will definitely file for >>> new features e.g >>> * Batching via rest api (Being on .Net we rely solely on the Rest >>> API) >>> * Configuration level control of transaction log default sizes e.g. >>> 10mb -> 100mb, disabled >>> * Explore ways to optimise flushing to disk without affecting the >>> rest api >>> >>> Regards >>> >>> -----Original Message----- >>> From: user-boun...@lists.neo4j.org >>> [mailto:user-boun...@lists.neo4j.org] On Behalf Of Peter Neubauer >>> Sent: Friday, 23 September 2011 7:28 AM >>> To: Neo4j user discussions >>> Subject: Re: [Neo4j] Turning Off or Configuring log rotation >>> >>> Romiko, >>> Gremlin is basically executing Java on the server side and thus can do >>> anything java can do. >>> http://docs.neo4j.org/chunked/snapshot/gremlin-plugin.html#rest-api- >>> send-an-arbitrary-groovy-script---lucene-sorting >>> has an example of mixing native Neo4j API calls (g.createNode() etc) >>> after obtaining the injected Neo4j DB instance with >>> >>> g.getRawGraph(), in this case using Neo4j Index sorting. >>> >>> After that, just call the log rotation code. Let me know how it works out, >>> otherwise I can provide an example tomorrow? >>> >>> Cheers, >>> >>> /peter neubauer >>> >>> GTalk: neubauer.peter >>> Skype peter.neubauer >>> Phone +46 704 106975 >>> LinkedIn http://www.linkedin.com/in/neubauer >>> Twitter http://twitter.com/peterneubauer >>> >>> http://www.neo4j.org - Your high performance graph database. >>> http://startupbootcamp.org/ - Öresund - Innovation happens HERE. >>> http://www.thoughtmade.com - Scandinavia's coolest Bring-a-Thing party. >>> >>> >>> >>> On Thu, Sep 22, 2011 at 11:17 PM, Romiko Derbynew >>> <romiko.derby...@readify.net> wrote: >>>> Hi Peter, >>>> >>>> I think this will be ok via gremlin. Have you got any sample gremlin code >>>> that can do this, that would be much appreciated. Also in the long term I >>>> think a combo of tx logs + rest API batching will be the solution. >>>> >>>> Sent from my iPhone >>>> >>>> On 22/09/2011, at 10:08 PM, "Peter Neubauer" >>>> <peter.neuba...@neotechnology.com> wrote: >>>> >>>>> Romiko, >>>>> I would suggest to do the TX log config via Gremlin for the time >>>>> being, so you can resolve it via scripting. For the exposure of >>>>> the Tx log rotate size as a configuration property (there are logs >>>>> for every XA resource participating in a transaction), please >>>>> raise an issue at https://github.com/neo4j/community/issues - good input! >>>>> >>>>> For the flushing to disk, we will merge a Deferred Write feature >>>>> back into master soonish (after 1.5) which lets the OS decide when >>>>> to flush, if you can stand the risk of a lost flush if things go down. >>>>> The REST interface is waiting for the TX to be finished, which is >>>>> why it is slowing down when you have big flushes. See >>>>> https://github.com/neo4j/community/issues/18 for the ticket on >>>>> this >>>>> :) >>>>> >>>>> Would that be ok? >>>>> >>>>> Cheers, >>>>> >>>>> /peter neubauer >>>>> >>>>> GTalk: neubauer.peter >>>>> Skype peter.neubauer >>>>> Phone +46 704 106975 >>>>> LinkedIn http://www.linkedin.com/in/neubauer >>>>> Twitter http://twitter.com/peterneubauer >>>>> >>>>> http://www.neo4j.org - Your high performance graph database. >>>>> http://startupbootcamp.org/ - Öresund - Innovation happens HERE. >>>>> http://www.thoughtmade.com - Scandinavia's coolest Bring-a-Thing party. >>>>> >>>>> >>>>> >>>>> On Thu, Sep 22, 2011 at 1:52 PM, Romiko Derbynew >>>>> <romiko.derby...@readify.net> wrote: >>>>>> Hi, >>>>>> >>>>>> It's the database logging, I'm finding the transaction logs are causing >>>>>> the rest API to become unresponsive when it flushes to disk. Basically >>>>>> just want to turn it off or set the tlog size by configuration and not >>>>>> via code sample as it is demonstrated in the performance guide. >>>>>> >>>>>> The current work around without this setting is a circuit breaker >>>>>> pattern. But I am very concerned as the DB flush should not slow >>>>>> down further rest calls :( >>>>>> >>>>>> Sent from my iPhone >>>>>> >>>>>> On 22/09/2011, at 6:36 PM, "Peter Neubauer" >>>>>> <peter.neuba...@neotechnology.com> wrote: >>>>>> >>>>>>> Romiko, >>>>>>> which log files are you referring to? For the database >>>>>>> transaction log rotation, look at the neo4j.properties file to >>>>>>> tune things, see >>>>>>> http://docs.neo4j.org/chunked/snapshot/server-configuration.html >>>>>>> >>>>>>> For the server, there is logging.properties to tweak stuff. Note >>>>>>> that these settings require a restart to take effect. >>>>>>> >>>>>>> HTH >>>>>>> >>>>>>> Cheers, >>>>>>> >>>>>>> /peter neubauer >>>>>>> >>>>>>> GTalk: neubauer.peter >>>>>>> Skype peter.neubauer >>>>>>> Phone +46 704 106975 >>>>>>> LinkedIn http://www.linkedin.com/in/neubauer >>>>>>> Twitter http://twitter.com/peterneubauer >>>>>>> >>>>>>> http://www.neo4j.org - Your high performance graph >>>>>>> database. >>>>>>> http://startupbootcamp.org/ - Öresund - Innovation happens HERE. >>>>>>> http://www.thoughtmade.com - Scandinavia's coolest Bring-a-Thing party. >>>>>>> >>>>>>> >>>>>>> >>>>>>> On Thu, Sep 22, 2011 at 1:38 AM, Romiko Derbynew >>>>>>> <romiko.derby...@readify.net> wrote: >>>>>>>> Hi, >>>>>>>> >>>>>>>> I am using Neo4j on a Windows Server, is there any way I can configure >>>>>>>> log rotation via the configuration files? I would like to turn it off >>>>>>>> or try a different log rotation size. Since I am on windows, I am not >>>>>>>> sure how I would do it at runtime. >>>>>>>> >>>>>>>> Thanks! >>>>>>>> _______________________________________________ >>>>>>>> Neo4j mailing list >>>>>>>> User@lists.neo4j.org >>>>>>>> https://lists.neo4j.org/mailman/listinfo/user >>>>>>>> >>>>>>> _______________________________________________ >>>>>>> Neo4j mailing list >>>>>>> User@lists.neo4j.org >>>>>>> https://lists.neo4j.org/mailman/listinfo/user >>>>>>> >>>>>> _______________________________________________ >>>>>> Neo4j mailing list >>>>>> User@lists.neo4j.org >>>>>> https://lists.neo4j.org/mailman/listinfo/user >>>>>> >>>>> _______________________________________________ >>>>> Neo4j mailing list >>>>> User@lists.neo4j.org >>>>> https://lists.neo4j.org/mailman/listinfo/user >>>>> >>>> _______________________________________________ >>>> Neo4j mailing list >>>> User@lists.neo4j.org >>>> https://lists.neo4j.org/mailman/listinfo/user >>>> >>> _______________________________________________ >>> Neo4j mailing list >>> User@lists.neo4j.org >>> https://lists.neo4j.org/mailman/listinfo/user >>> >>> >>> _______________________________________________ >>> Neo4j mailing list >>> User@lists.neo4j.org >>> https://lists.neo4j.org/mailman/listinfo/user >>> >>> >>> _______________________________________________ >>> Neo4j mailing list >>> User@lists.neo4j.org >>> https://lists.neo4j.org/mailman/listinfo/user >>> >>> >>> _______________________________________________ >>> Neo4j mailing list >>> User@lists.neo4j.org >>> https://lists.neo4j.org/mailman/listinfo/user >>> >>> >>> _______________________________________________ >>> Neo4j mailing list >>> User@lists.neo4j.org >>> https://lists.neo4j.org/mailman/listinfo/user >>> >> _______________________________________________ >> Neo4j mailing list >> User@lists.neo4j.org >> https://lists.neo4j.org/mailman/listinfo/user >> > _______________________________________________ > Neo4j mailing list > User@lists.neo4j.org > https://lists.neo4j.org/mailman/listinfo/user > _______________________________________________ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user _______________________________________________ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user