Entries in architecture (2)


Ask HS: Design and Implementation of scalable services?

We have written agents deployed/distributed across the network. Agents sends data every 15 Secs may be even 5 secs. Working on a service/system to which all agent can post data/tuples with marginal payload. Upto 5% drop rate is acceptable. Ultimately the data will be segregated and stored into DBMS System (currently we are using MSQL).

Question(s) I am looking for answer

1. Client/Server Communication: Agent(s) can post data. Status of sending data is not that important. But there is a remote where Agent(s) to be notified if the server side system generates an event based on the data sent.

- Lot of advices from internet suggests using Message Bus (ActiveMQ) for async communication. Multicast and UDP are the alternatives.

2. Persistence: After some evaluation data to be stored in DBMS System.

- End of processing data is an aggregated record for which MySql looks scalable. But on the volume of data is exponential. Considering HBase as an option.

Looking if there are any alternatives for above two scenarios and get expert advice.


10 Things You Should Know About AWS

Authored by Chris Fregly:  Former Netflix Streaming Platform Engineer, AWS Certified Solution Architect and Purveyor of

Ahead of the upcoming 2nd annual re:Invent conference, inspired by Simone Brunozzi’s recent presentation at an AWS Meetup in San Francisco, and collected from a few of my recent consulting engagements, I’ve compiled a list of 10 useful time and clock-tick saving tips about AWS.

1) Query AWS resource metadata


Can’t remember the EBS-Optimized IO throughput of your c1.xlarge cluster?  How about the size limit of an S3 object on a single PUT? is the answer to all of your AWS-resource metadata questions.  Interested in integrating with your application?  You’re in luck.  There’s now a REST API, as well!

Note:  These are default soft limits and will vary by account.

2) Tame your S3 buckets


Delete an entire S3 bucket with a single CLI command:  

aws s3 rb s3://<bucket-name> --force

Recursively copy a local directory to S3:

aws s3 cp <local-dir-name> s3://<bucket-name> --region <region-name> --recursive

3) Understand AWS cross-region dependencies

Click to read more ...