As DataStax will discontinue the OpsCenter (http://docs.datastax.com/en/opscenter/5.2/opsc/opscPolicyChanges.html), which was rather okay for monitoring purposes and the daily management tasks,
I'm searching for a valid alternative. The list of tools under http://www.planetcassandra.org/related-projects/ does not really look attractive.
Is there a meaningful or even better way? OpsCenter already had very limited functionality for OSS. Any recommendations?
Cassandra exposes own metrics via JMX, so you can use any tool that is able to collect JMX data.
On production environment we are using Zabbix for monitoring purposes.
Also we looked at Graphite but we chose Zabbix because it is our "corporate standard"
Related
We are creating Jmeter performance benchmarking for our Cassandra installation.
For which we have been referring to the default Cassandra plugin mentioned in the site
This plugin does not take any Cassandra server connection parameter for the "put", no much help is also present to how to use this plugin.
Some can help me with this plugin if any one knows how to configure Cassandra connection
Hence we switched to an article to test Cassandra with Groovy. (Link here)
This site calls to add multiple jar some are bundles and cannot find the exeat JAR
snappy-java-1.0.5
netty-transport-4.0.33.Final
netty-handler-4.0.33.Final
netty-common-4.0.33.Final
netty-codec-4.0.33.Final
netty-buffer-4.0.33.Final
metrics-core-3.1.2
lz4-1.2.0
HdrHistogram-2.1.4
guava-16.0.1
Can some help me with some simpler test perform on Cassandra ?
For correct performance testing of Cassandra it's better to use specialized tools, like NoSQLBench that was developed specifically for that task. Generic tools won't give you the real performance numbers. Please read NoSQLBench documentation on how to correctly test Cassandra to take into account things like compaction, repairs, etc.
Have you tried to read documentation which mentions CassandraProperties configuration element where you can define your connection server parameters:
If you want to have the full control and not only be limited to what other guys implemented you can consider following instructions from Cassandra Load Testing with Groovy article
We are looking into options to monitor our Acumatica instance to identify performance issues on the application level as well as the SQL server level. We have experience with newrelic and a few others, but also read about Retrace (https://stackify.com/retrace/) which looks worth trying.
I'm curious to know if it's possible/recommended to install such tools within Acumatica?
Does anyone have any experience or feedback on the topic?
Acumatica includes a built-in request profiler that can be used to monitor requests, performance and SQL. Probably not as sophisticated as New Relic, but powerful enough when you have performance issues to resolve. Read more here: https://help-2017r2.acumatica.com/(W(2))/Wiki/ShowWiki.aspx?wikiname=HelpRoot_User&PageID=e7612f3f-fc6f-494d-8532-cc2ceef7147b
I have a few questions regarding the integration of the two tools. Not technical questions and how to setup( i will have my fun with that later ) but more on the course of the project and the direction, seeing that JanusGraph is still very young.
I am starting a new project and already decided to use Cassandra for storage and using a graph on top sounds very appealing to me.
A couple of things that i would like to know in advance before i take that road.
JanusGraph is very young and it picks up from where Titan left about a year or so ago. There is gap there but the fact that is part of the Linux Foundation and all the big players are going to support it sounds promising. Is it safe to assume at this point that JanusGraph is here to stay? Would it be safe to depend on Janus as a startup project? And follow development of course and be up to date as much as possible.
Cassandra. Titan/JanusGraph integrates with Cassandra 2.1.9 using the thrift api which will be deprecated eventually in Cassandra 4. I know that work is being done at the moment to make janus work with Cassandra 3 and eventually work with CQL as well. Is it safe to start with existing janus and Cassandra 2.1.9 and deal with the migration later on? Will it be a huge task for a startup to handle?
Production ready JanusGraph.(This question relates to any kind of software in it's early stages and whether it's safe for a start up to use). As i understand it, it will take some time for JanusGraph to be production ready and catch up with the rest of the tools it integrates with( although work is being done as we speak:)). Again would it be safe to start using Janus at this point and follow development and finally migrate to a production ready version? What is the overall roadmap for JanusGraph?
My concern in general is whether the combination of the tools is a safe choice for a start up. The whole stack is already new to us and we are excited to try and learn but we will hit a migration period pretty quickly. Is it something that you would do/recommend? Is it a suicide?
Please share your thoughts and keep in mind that it doesn't have to be about the stack i am talking about. It could be any startup company dealing with any kind of software in its early stages.
Cheers
Full disclosure, I'm a developer for JanusGraph on Compose.
It's as safe as any other OSS software project with a large amount of backers. Everyone could jump on some new toy tomorrow, but I doubt it. Companies are putting money into it and the development community is very active.
There is a CQL backend for Janus that's compatible with the Thrift data model. Migration to CQL should be simple and pretty painless when 0.2.0 is released.
I know there are already people using Titan for production applications. With JanusGraph being forked from Titan, I think it's pretty reasonable to start in with JanusGraph from everything I've seen. As far as a roadmap, I'd check out the JanusGraph mailing list (dev/users) and see what's going on and what's being talked about.
Disclosure: I am one of the co-founders of the JanusGraph project; I am also seeking out and adding production users to our GitHub repo and website, so I may be slightly biased. :)
Regarding your questions:
Is it safe to use?
The project is young, but it is built on a foundation of Titan, a very popular graph database that's been around since 2012 and has already been running in production. We have contributors from a number of well-known companies, and several companies are building their business-critical applications directly on JanusGraph, e.g.,
GRAKN.AI is building their knowledge graph on JanusGraph
IBM's Compose.io has built a managed JanusGraph service
Uber is already running JanusGraph in production (having previously run Titan)
several other companies run JanusGraph as a core part of their production environment
We are also starting to identify companies who will provide consulting services around JanusGraph in case someone needs production-level support for their own self-managed deployments.
So as you can see, there is significant interest in and support for this project.
Cassandra upgrade
#pantalohnes answered this question; I won't repeat it here.
Production readiness
As I linked above (GitHub repo and website), we already have production users of JanusGraph which you can find there. Those are just the companies that are publicly willing to lend their name/logo to the project; I'm sure there are more. Also, Titan has been running in many production environments for several years; JanusGraph is a more up-to-date version of Titan, despite the low version number.
I am also speaking with other companies who are planning to migrate to JanusGraph soon; look for announcements via the #JanusGraph Twitter handle to learn about more production deployments.
I know about the Cassandra PHP driver being in BETA. But I strongly believe DataStax offers the best solutions as far as PHP drivers go for Cassandra.
What I would love to try is to see if it's possible to get cassandra data into my PHP application using CQLSH and PHP shell commando's. (both Cassandra and PHP script run on the same server. )
Anyone ever tried this?
Would there be a method to get CQLSH return json or a different output instead of columns fit for my console?
Thanks for your insights.
cqlsh is built using the DataStax python driver. That being said, I would not recommend system calls to cqlsh using OS system calls from php. Not only is it impractical from a data format perspective, it is also hacky, I would not expect it to perform well, and it would be adding a lot of complexity and failure scenarios to your application.
For scalability, if you ever need to move your application to a different machine, you would not be able to. These are just a few of the downsides that I can think of from the top of my head.
You are better off using the beta PHP driver from DataStax or waiting for a stable version. RC1 is due to drop soon.
Is there an advantage to using one or the classes to execute statement in a .Net application. As a .Net developer using CqlConnection and CqlCommand is very similar what is done for other dbs (like SqlServer). I read on some web sites that Cluster and Session is a better way to go.
The documentation in DataStax does not describe the differences or any suggestions of which to use under what circumstances.
Thanks
Use the cluster and session objects in the DataStax driver
DataStax drivers provide critical functionality for enterprise cassandra apps, including configurable load balancing policies, automatic failover, retry policy, and tunability. These features are exposed via the cluster and session objects.
Notice that CqlConnection and CqlCommand are not even mentioned in the DataStax documentation. This is because they are used under the hood by the driver.
You can certainly use these to connect and read/write to cassandra but you will be missing out on the features I mentioned.
Pro Tip: Check the code comments here to see the functionality of the Cluster object. DataStax drivers are Open Source so feel free to go code diving!