Can we put all these together in our webpage? This is valuable to all the new ZK developers
From: "Jürgen Wagner (DVT)" [mailto:[email protected]] Sent: 2014年11月11日 13:15 To: [email protected] Subject: Re: Best strategy to test Zookeeper Hello Ibrahim, do the following: - Create a znode /tests/status and keep setting a Watcher on it to look out for data updates. This is one process just watching the znode and logging times of changes. - Run your second process which actually performs the tests, plus it will update /tests/status as the last request after having performed all tests. /tests/status may be set to, e.g., "completed" or a timestamp indicating the time when that request was sent. This is the second process creating the test scenario. What will now happen is the following: - The Watcher process will sit there and wait for /tests/status updates. - The test process will run and finally update the special znode. - The Watcher process will be notified of the update (the test completion) and log the test completion time, plus the value found in the special znode. As there is a total ordering of all requests within the test process session, you can be sure that the update to /tests/status is in fact the last operation, i.e., all of your async requests have been completed and all data is really persistently stored in Zookeeper. If you have sub-tests or different phases in your tests, these phases could make intermediate updates of your status znode, providing the time when the actual operations of the respective phase have been processed and completed by Zookeeper. If you want to be really precise, you would run the /tests/status setting without any tests and discount this execution time from the results of your test. That would be the (miniscule) overhead of the final test completion latch. Best regards, --Jürgen On 11.11.2014 06:00, Ibrahim wrote: Hi Jürgen, When you say "Then set up a watcher for this special node to get notified when Zookeeper has finished processing all requests". In fact, the main reason for posting this question is that I do not know when Zookeeper will finish processing all requests (In Async mode). I need to catch end time. Can you give me hint with this? Thanks alot Ibrahim -- View this message in context: http://zookeeper-user.578899.n2.nabble.com/Best-strategy-to-test-Zookeeper-tp7580580p7580584.html Sent from the zookeeper-user mailing list archive at Nabble.com. -- Mit freundlichen Grüßen/Kind regards/Cordialement vôtre/Atentamente/С уважением i.A. Jürgen Wagner Head of Competence Center "Intelligence" & Senior Cloud Consultant Devoteam GmbH, Industriestr. 3, 70565 Stuttgart, Germany Phone: +49 6151 868-8725, Fax: +49 711 13353-53, Mobile: +49 171 864 1543 E-Mail: [email protected]<mailto:[email protected]>, URL: www.devoteam.de<http://www.devoteam.de/> ________________________________ Managing Board: Jürgen Hatzipantelis (CEO) Address of Record: 64331 Weiterstadt, Germany; Commercial Register: Amtsgericht Darmstadt HRB 6450; Tax Number: DE 172 993 071
