September 2015 - hawkular-dev - Jboss List Archives

by John Mazzitelli

BTW end of the day today, the new bus and cmdgw API will be in master. I have a PR that fixes pinger and avail-creator so you can see what changes (these two required minimal changes): https://github.com/hawkular/hawkular/pull/506/files Inventory and Alerts will probably need similar changes

10 years, 10 months

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batch vs async inserts

by John Sanda

Many of you have probably seen warnings in the Hawkular server log like, -------------- WARN 15:55:59 Batch of prepared statements for [hawkular_metrics.data, hawkular_metrics.metrics_idx] is of size 5665, exceeding specified threshold of 5120 by 545. -------------- This warning is generated due to batch statements being larger that a threshold defined in cassandra.yaml. It defaults to 5 KB. When the batch statement is larger than that threshold, Cassandra logs the warning. Note that the threshold is based on the actual size of the payload, not the number of statements in the batch. We should stop seeing this warning in 0.7.0 release of Metrics. See HWKMETRICS-252[1] for details. The general advice in the Cassandra community is to favor async writes in parallel over batch inserts when you are trying to improve or optimize write performance. Unlogged batches across multiple partitions is almost always a bad idea. The one exception is with unlogged batches in which all of the mutations are for the same partition. In that case, Cassandra performs the writes atomically. This is how we use batch inserts in metrics. Interestingly I have seen threads on the Cassandra mailing list that still discourage the use of batch inserts even in this case. This thread[1] provides some really interesting insights and analysis on unlogged batch inserts vs async inserts. The thread references a document with some performance analysis that is worth a look. [1] https://issues.jboss.org/browse/HWKMETRICS-252 <https://issues.jboss.org/browse/HWKMETRICS-252> [2] http://www.mail-archive.com/user%40cassandra.apache.org/msg43976.html <http://www.mail-archive.com/user@cassandra.apache.org/msg43976.html>

10 years, 10 months

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Good talk about measuring latency

by Heiko W.Rupp

https://www.youtube.com/watch?v=lJ8ydIuPFeU If you don't have the time - most load generators suck from "coordinated omission". Gatling seems to be one of the few that work correctly https://youtu.be/lJ8ydIuPFeU?t=38m52s

10 years, 10 months

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Fwd: [wildfly-dev] Powershell scripts

by Heiko W.Rupp

Windows devs FYI Forwarded message: > From: Tomaž Cerar <tomaz.cerar(a)gmail.com> > To: wildfly-dev(a)lists.jboss.org <wildfly-dev(a)lists.jboss.org> > Subject: [wildfly-dev] Powershell scripts > Date: Tue, 29 Sep 2015 17:29:42 +0200 > > Hey guys, > > > just heads up, I've managed to prepare[1] all powershell scripts to > replace > the aging .bat ones. > > New scripts unify most of the shared "code" that all scripts use by > including common.ps1, > and each script only has the code that differs from common behavior > they > all share. > > As result of move we now have much more reliable and faster scripts > that > share common code, > which helps with maintaining a lot. > > New scripts (domain.ps1 & standalone.ps1) now support --background > (also > controllable via .conf.ps1) > option that runs the process in background and remembers its pid and > as > such add support for > feature that until now was only in *nix version of scripts. > > I would like to propose this PR for inclusion to WildFly 10. As it > doesn't > alter any existing behavior > but just adds & improve the script experience on Windows. > > As we get to test and verify that new scripts don't break/include any > currently available option/action > I would also like to remove the batch scripts[2], so they would just > do > call out to their .ps1 counter parts. > > Once this scripts get merged, I will send PR to also add PS scripts > for > WildFly full defined scripts, > given that most of the functionally is already in "common.ps1" new > scripts > will be just simple 5 liners [3] > > > -- > tomaz > > > [1] https://github.com/wildfly/wildfly-core/pull/1118 > [2] https://github.com/wildfly/wildfly-core/pull/1126 > [3] > https://github.com/ctomc/wildfly-core/blob/powershell/core-feature-pack/s... > _______________________________________________ > wildfly-dev mailing list > wildfly-dev(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/wildfly-dev

10 years, 10 months

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Switching personas is now implemented

by Juraci Paixão Kröhling

Team, The first screens for Organizations are now implemented, which means that the account switcher (top-right corner) now includes the organizations that the user might switch to. The "SwitchedPersona" event was already implemented, and I think a feature or two was already prepared for that ("Inventory" comes to my mind). For other screens, I don't think it's currently correct, so, please test your screens and see if any action is required once this event occurs. The general rule is: if you got data that is dependent on the current tenant, you might want to re-load the data. Same for permissions: if you checked the permission before showing an item on the screen, you might want to re-evaluate that for the "current tenant". As reminder: the documentation for the events produced by Accounts can be found here: http://www.hawkular.org/docs/dev/accounts.html#_frontend_events And this is an example of how to use it: http://git.io/vc3CL - Juca.

10 years, 10 months

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Recording from src-deps presentation

by Heiko W.Rupp

The presentation has been recorded and should be viable here: https://bluejeans.com/s/8CPv/ Peters slides: http://ppalaga.github.io/presentations/150929-srcdeps-maven-plugin/150929... Thanks again Peter!

10 years, 10 months

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bus API changes - BasicMessage will be interface - AbstractMessage is the new superclass

by John Mazzitelli

this is a heads up: Peter has done some refactoring work on the bus API - part of it means BasicMessage is now an interface and AbstractMessage is the new "superclass" that messages extend. IIRC, both inventory and alerts use the bus API as well. this means once this gets merged: https://github.com/hawkular/hawkular-bus/pull/44/files We'll probably need to fix inventory and alerts as well.

10 years, 10 months

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Hawkular UI [Developers] Typescript update

by mike thompson

If you are doing Hawkular UI development please update your Typescript compiler to 1.6 (from 1.5) as we will begin using those features and you may have issues compiling on your local development machine if you are not using 1.6. Announcing Typescript 1.6: http://blogs.msdn.com/b/typescript/archive/2015/09/16/announcing-typescri... <http://blogs.msdn.com/b/typescript/archive/2015/09/16/announcing-typescri...> Please note, if you are just compiling Hawkular via maven no changes are needed. However for UI dev work using gulp and bower incompatibilities may occur. tsc —version to see what version of typescript and to update: sudo npm update -g typescript It should read Version 1.6.2 after the update NOTE: This is a several day warning before the actual changes will take place this weekend. So if you are running the gulp dev build and get funny errors next week update your TS version first.

10 years, 10 months

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Any idea how to move component specific docs out of website repo?

by Thomas Segismont

Hi everyone, Currently, the website offers Hawkular docs as well as components and REST API docs. The way REST API docs are updated is very nice: when Travis builds a component's master branch (typically, after a PR is merged), it generates the API doc and then pushes the result to the website repository. I'm wondering what's needed to follow a similar process for component specific docs. Any ideas? The goal would be to move component specific doc files to the component repository. Code and doc in the same place. Thanks, Thomas

10 years, 10 months

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New and noteworthy in hawkular-parent 24

by Peter Palaga

Hi *, hawkular-parent 24 brings the following: * srcdeps-maven-plugin 0.0.4 * fixed on Windows * less console output * source dependencies built without tests * testng added to management * wildfly-maven-plugin 1.1.0.Alpha4 was still not available when I was releasing. I have sent PRs to all components repos. Thanks, Peter

10 years, 10 months

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hawkular-dev September 2015