Prestodb logoPresto Installation and Setup Pitfalls

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Like other installations and setups, Presto one can contain steps which cause difficulties. How many times you were stuck with something? In mostly cases, it was a trivial issue but you spent countless time to solve it. It's better to have a cheat sheet for discovering those issues before encountering …

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Kerberos logoCreate Ticket Cache File for Kerberos Authentication in Linux

Kerberos credentials can be stored in Kerberos ticket cache. They are valid for relatively short period of time. The period can be a session or a specified timeframe. A Kerberos ticket cache contains a service and a client principal names, lifetime indicators, flags, and the credential itself. Kerberos 5 client …

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Google analytics logoAdd Google Analytics Pageviews in Static Web Site

Google Analytics requests authentication to access Google Analytics data/reports. Implementation of Google Analytics can be done in both places client and server. Server APIs support a wide variety of languages and the authentication process is transparent for users. Javascript is a language to access Google Analytics APIs in client …

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Kerberos logoCreate Keytab for Kerberos Authentication in Linux

Keytab stands for key table. It is a file which stores one or more Kerberos principals with corresponding encrypted keys. Encrypted keys are generated based on user passwords. It allows to secure storing of passwords and authenticate users without entering of passwords. The current version of the Kerberos protocol is …

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Synology logoInstalling and Using PIP on Synology DSM

Python3 can be easily installed on Synology DSM through Synology Installation Center but pip installation is skipped. One of the methods to install pip is to bootstrap the pip installer into an existing Python installation. The ensurepip package is aimed for it. It's available starting from Python version 3.4 …

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Apache hive logoMulti-Character Field Delimiter in Apache Hive Table

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Multi-character field delimiter is not implemented in LazySimpleSerDe and OpenCSVSerde text file SerDe classes. There are two options to use multi-character field delimiter in Hive. The first option is MultiDelimitSerDe class specially developed to handle multi-character field delimiters. The second one is to use RegexSerDe class as a workaround. Those …

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Apache hive logoField Delimiter in Apache Hive Table

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Not too much official documentation can be found on how to define a field delimiter in a create or an alter Apache Hive statement. This setting is requested for delimited text files placed as source of Hive tables. When a field delimiter is not assigned properly, Hive can't split data …

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