got chance working on a hybrid mobile framework for the new corp. and deliver an new app at the same time. and that led to the `ionic` love and hate relationship good love the idea and the possibility of code once, run on multiple platform love the fact that web technique is at the central…
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Akka is an awesome actor system, its abstraction away from the threads is absolutely great, yet, you might have to deal with those as Akka couldn’t solve everything. In the experience of latest project, I’ve got chance playing Akka with ZooKeeper, with Cassandra, with Spray and a lot of the asynchronous world, and whenever Akka needs…
Akka Cluster is meant to solve the various aspects of cluster management given a cluster of akka running nodes. A few problems exist today making it a bit hard to adopt in our current product, including but not limited to: u need a list of seed nodes u need to have those seed nodes up…
To begin with, akka-zmq has some serious problems: Very high latency, your expectation for 100 micros is unreachable, simple REQ/REP could be over 100 millis! ZMQ 2.x compatibility only, meaning 3.x is up in the air, though the scala binding does say to get there, no timeline! To address both, I tried JeroMQ: ZMQ 3.x…
i tried reactor from spring a bit more, doesn’t seem to provide too much, and some overhead exists over netty. now that netty 4.0 getting more & more adoption, it’s interesting just to see whether msgpack-rpc could be updated (current netty 3.x) the major benefits are: performance, esp. less GC overhead, compared with netty 3.x…
msgpack-rpc has two major benefits: asynchronous arch & multi language support, which makes it a good candidate for our use case. https://github.com/msgpack-rpc/msgpack-rpc-java but its java implementation has some drawbacks, namely, the busy waiting Future implementation & its wasteful tcp pipeline. using its own test case, we could verify both points, and the average transaction time was…
last performance experiment upon docker.io did expose some overhead, i was a bit concerned for the environment setup as i had it running on vm. It could be that docker.io doesn’t play along with the vm that well. therefore, i got a workstation converted to ubuntu 12.04 and rerun the jmeter test. here’s the setup:…
So our users have happily deployed node.js applications to production, for months! Despite some minor issues, node.js have been proven to be quite perform, and even reliable (thanks to cluster management). Given a break, I got some chances to look at more aspects of the application, framework and beyond to squeeze out more from node.…
So i’ve been using brackets.io for a while, quite pleasant, and now there’s https://github.com/adobe-research/node-theseus added, it seems my favorite https://github.com/node-inspector/node-inspector debugging support for node.js has a little competition here. But i soon realized some problems or limitations of thesus: it needs node-thesus to run ur app, not node, expect some code change for ur app or testing…
Unlike most of our team’s developers, who already got the latest mac pro (quite high end), my poor old thing doesn’t have any SSD, and a bit shy with its limited RAM & CPU got me a bit unhappy. Coz we’re creating larger app using node, more & more modules are to be loaded each…
https://github.com/cubejs/cluster2/tree/cluster3 is about to GA, I’m quite excited for putting it together. A few things we added on the way are quite interesting: nanny monitoring for irresponsive workers bruteforce killing via ‘SIGTERM’ and use exception to determine if the process has been actually collected pause/resume of a worker (for taking it out of traffic and…
Apart from the new features added, I also carefully reviewed the performance aspects, and did some enhancements for the sake of robustness. One observation from the real production application was that, GC would become a problem, sooner or later, and when it comes, it comes badly. I tried using –nouse-idle-notification and mitigated the problem noticeably,…
I’ve been busy with this goal for the last year or so, 2 emerging features I tried to deliver, one being the cluster2 and the other is logging. I’ll explain cluster2 in this post and logging later, as in fact, logging is more complicated, much trickier than you could think of in an asynchronous world.…
It occurs to me that much as the node.js community and the usage grow, lots of java or other developers still figure it as premature and reject it for enterprise applications. To some extent, I found their conservation reasonable, and the major reason for that could be the operational gap. A fundamentally different architecture requires…
huiqingzhou 