Re: MQTT and Arduino

2016-02-26 Thread Klaus Pittig
Not ActiveMQ related, but try this: http://pubsubclient.knolleary.net/ some nice (german) projects with sample code for this: - http://blue-pc.net/2014/10/15/mqtt-nachrichten-mit-dem-arduino-empfangen-senden/ - http://blue-pc.net/2014/11/16/wohnzimmer-steuerung-mit-arduino-und-mqtt/ HTH Am 26.

Re: KahaDB vs LevelDB

2016-01-29 Thread Klaus Pittig
be significantly faster than any JDBC > persistence solution, so if you switch to JDBC than you will have a large > performance hit. > > On Fri, Jan 29, 2016 at 3:34 AM, Klaus Pittig < > klaus.pit...@futura4retail.com> wrote: > >> I agree. We also ran into several

Re: KahaDB vs LevelDB

2016-01-29 Thread Klaus Pittig
I agree. We also ran into several issues using LevelDB and decided to switch back to KahaDB as the default persistence, even if it's slower. Our efforts repairing LevelDB storages on many different machines were only with moderate success. In contrast handling problems with KahaDB is a straightfor

Re: How to avoid blocking of queue browsing after ActiveMQ checkpoint call

2016-01-13 Thread Klaus Pittig
e you confirmed via the thread dump > that there is not a checkpoint operation still in progress? Also, > how large are your journal files that are getting checkpointed? If > they're large enough that all messages for one file won't fit into > the memory store, you might be

Re: How to avoid blocking of queue browsing after ActiveMQ checkpoint call

2016-01-08 Thread Klaus Pittig
ssageCursor seems to decide that there is not enough memory and stops > delivery of queue content to browsers/consumers? What symptom tells you > that? > On Jan 8, 2016 8:25 AM, "Klaus Pittig" > wrote: > >> (related issue: https://issues.apache.org/jira/browse/AMQ-6115) &

How to avoid blocking of queue browsing after ActiveMQ checkpoint call

2016-01-08 Thread Klaus Pittig
(related issue: https://issues.apache.org/jira/browse/AMQ-6115) There's a problem when Using ActiveMQ with a large number of Persistence Queues (250) á 1000 persistent TextMessages á 10 KB. Our scenario requires these messages to remain in the storage over a long time (days), until they are consu