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I‘m a new to clickhouse, and already read "druid vs clickhouse", but still don't know which situation can use clickhouse. I know they are good OLAP engines。
Druid is an excellent timing database。 At large data scale, it can provide ad-hoc aggregate queries，clickhouse too；
They have similar disadvantages, such as slow data writing。
Which engine should I do with OLAP？
This is the great article https://leventov.medium.com/comparison-of-the-open-source-olap-systems-for-big-data-clickhouse-druid-and-pinot-8e042a5ed1c7
Either your organization should have engineers who are able to read, understand and modify the source code of the chosen system, and have capacity to do that. Note that ClickHouse is written in C++, Druid and Pinot — in Java.
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Is there a way to share shiny apps internally with non-R users for free with unlimited hours? Also, due to the sensitivity of the data, I'd prefer not to have it open to the public.
Yes. The best solution is:
https://www.rstudio.com/products/rstudio-server-pro/
but if you want a free version you can get:
https://www.rstudio.com/products/shiny/shiny-server/
and for example add:
https://www.shinyproxy.io/
for authentication (if you need).
or
docker and https://hub.docker.com/r/rocker/shiny/
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I am trying to benchmark some R code, which will be run on several machines with very different levels of perforamnce to more fully understand its behavior. I am writing log files, but I would like to include in those log files the system specifications of the machine running the code. Sys.info() does not provide the information I'm looking for which would be things like available RAM, processor type, etc. Is there an alternate command or package I should look at to get this information?
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There are 3 different licence type in MS-SQL server 2012:
Enterprise
Business Intelligence
Standard
What is their properties
From what I could make out of your question, Standard is what you probably need. Enterprise adds in additional high availability features, advanced BI options and ups the limits of memory and CPU. BI edition is mostly beneficial for data warehousing without the added expense of Enterprise.
Here is a good breakdown on functionality:
http://msdn.microsoft.com/en-us/library/cc645993.aspx
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What are some good libraries for doing TCP reassembly? I have some pcap files (too large to handle using wireshark) and I want to do TCP reassembly. Development of libnids seems to have stopped. I'm wondering if anybody could give
Have you tried using the bro-ids http://bro-ids.org/ TCP layer written in C++? You are able to write simple application layer bro-scripts to do whatever you need to do. Otherwise, you can take a look on their src code.
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Can anyone suggest me the format of how to make and analyse database documentation.
There are tools to reverse engineer the schema of a database into a diagram that shows tables, relationships, field descriptions, etc.
Visio can reverse engineer SQL Server databases, for example.