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In my Node.js application I wanted to connect the Hazelcast node instance and access the Queue/Hashmap of Hazelcast Node. Is there any node.js module available to do this .
Thanks in advance.
Thought this question was asked over a year ago, some things have changed.
Hazelcast Node.js client in fact does exist and currently provides following features
implementation of Open Client Binary Protocol
Map
Get
Put
Remove
Smart Client - clients connect to each cluster node.
Since each data partition uses the well known and consistent hashing algorithm, each client can send an operation to the relevant cluster node, which increases the overall throughput and efficiency. The client doesn't need to be restarted in case of adding or removing nodes from the cluster.
Distributed Object Listener
Lifecycle Service
Thank you
As far as I know, there is no node.js library for Hazelcast. Some of the functionality is exposed through Memcached btw.
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I wrote a web server and i want to check his performance when there are multi client request at same time.
This server hold GIS information about any connected client - so the server allocate a lot of memory for each connected client.
The client connected by using browser ( like chrome ).
What i want is to run more then 10K client connection but i don't have more then 10K machine to run browser on each of them.
does there is some other way to do it?
I must know when my server will be crash or slow down.
You can use tools like apachebench, siege, etc.
This wikipedia page has a list of common webserver benchmarking tools: https://en.wikipedia.org/wiki/Web_server_benchmarking
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I have (for exercise) to create a server, to handle client connections. The subject talk about C programming, but I already did it. Id'like to do it again with node js. I don't need a http server, just a simple module which handle raw cmd. The protocol is given within the subject, and I will implement the logic of my app by my side. I am just new in node js programming, and its a light subject (about 5-6 commands). Do you know where I can start? Name/doc of a simple module, or just the minimalist code to handle client connection/command reading? (Cmds are simple strings, followed by \n).
I've searched inside npm website, but I just find http's server or something more elaborate, and I don't need so much feature. Just connections, commands in raw format and some events to handle nicely things like connection losts, read wich failed, etc...
I missed this documentation page: Net module
Thank you all!
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Could somebody please suggest me a good GUI client tool for Cassandra on Windows? I need something like Robo 3T (formerly Robomongo) for MongoDB.
DataStax (the maintainer of Apache Cassandra) has a tool called DevCenter . I use it, it gets the job done. A bit newer tool is DataStax Studio, which is more of a graph visualization tool, but I haven't used it, also check the pricing.
OpsCenter is a monitoring tool. It works with Apace Cassandra (the free one), with disabled features (all features availale in DataStax Enterprise).
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i'm using nodejs as a "query" server: client sends http GET http://xxxx:xxx/xxx?key=xxx to node.js, and node.js responses with corresponding value. the value is generated when queried, and i wanna cache it.
what i want for a cache includes:
productive usage, neither project nor demo.
lightweight: the key/value are both just string.
high performance: the key set may be 1M, and each key/value may be ~10KB.
concurrent: about ~10M queries per day.
persistent: i can store the cache to file system.
distributed: the node.js may be a cluster behind NGINX, so the cache should.
i think this is more than a single package, but a solution.
can anyone explain this solution?
Redis fits perfectly in most of the features you need as it is in-memory, persistent, high on performance, concurrent, distributed, works well in production and have nodejs integrations available.
Redis is a data structure server. It is open-source, networked, in-memory, and stores keys with optional durability.
Some features are :
- Transactions
- Pub/Sub
- Lua scripting
- Keys with a limited time-to-live
- LRU eviction of keys
- Automatic failover
You can read more about redis here or redis-wiki
You can also refer to this answer for more on redis.
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I will store simple plain text, but I'm looking for these features from a (D)DB/cache:
Replication across all nodes
Adding nodes to a live cluster
It's free
Persistence to disk (not to another DB)
Uses relatively little resources
Apache ZooKeeper fails the DB requirement, but I kinda want to misuse it for my intentions...
Apache Cassandra fails the last requirement.
Redis fails at first requirement (unless you're ready to get your hands dirty?).
Hazelcast and Voldemort fail at persistence, AFAIK.
These are my top picks and now I'm wondering if I'm on the right track, or is there another solution to this?
Thanks!
What about the CouchDB family? MemBase, BigCouch and Apache CouchDB.