Docker logoInstall Docker CE in CentOS/RHEL 7

Installing Docker CE in CentOS/RHEL 7 is a trivial process but it is not true in all cases. Specially, when we deal with open source products, maintaining and patching might be an issue for doing it in timely manner. Community forums and other sources are our life savers to …

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Prestodb logoConnect Presto to Cloudera Hive with Kerberos Authentication

Presto includes Hive connector to access Hive data warehouse. Warehouse data is stored in the Hadoop Distributed File System (HDFS) or in S3 compatible storages. Data files located in Hive warehouse are in varieties of formats and data size can be enormous. Presto uses Hive metastore to discover schemas and …

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Intel logoNVMe RAID Performance on Z390 Chipset Motherboard

NVMe SSD RAIDs are getting more popular in our days. It is an interesting question - what hardware to use to build more efficient RAID in terms of performance. Z390 chipset motherboard might include 2 or 3 NVMe slots for building of Raid 0 or 1 based on Intel® Rapid Storage …

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Security logoRemove Private Key from Java Keystore

Java keystore (JKS) is a file secured by a password. Java keystore repository can contain public key certificates with corresponding private keys. The keys are used to encrypt communication over network. If JKS file is distributed, private keys should be removed from the repository. keytool tool is aimed to manipulate …

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Dbeaver logoConnect DBeaver to Presto with HTTPS Protocol

Communication between Presto and a client can be secured with HTTPS protocol. config.properties Presto setup file located in /etc/presto folder includes the information necessary for establishing a connection to DBeaver. Java Keystore file contains a public key which is required to connect DBeaver to Presto cluster secured with …

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Centos logoAccess Windows 10 Shared Folder from RHEL/CentOS 7

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Heterogeneous networks are common now. Those networks include computers with Windows and Unix Operation Systems (OS). Exchange files between those Operation Systems is a trivial task. It can be done with command line interface (CLI) or Graphic User Interface (GUI). Both methods give the same results but it depends on …

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Intel logoSet Up NVMe Raid on Z370/Z390 Motherboards

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Z370 and Z390 Intel chipsets was released back in 2017 and 2018 years and they still are mainstream now. There are many motherboards based on Z370 and Z390 chipsets containing 2 or more M.2 sockets. Those motherboards might accommodate NVMe SSD storages with RAID 0 or 1 built on …

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Prestodb logoMemory Configuration in Presto Cluster

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Presto cluster is sensitive to memory setup. As Presto is developed in Java, Java is foundation to configure it. In many cases, Presto server is not started because of memory configuration. During Presto server launch, the validation rules are applied to make sure that major memory settings are consistent. It …

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Microsoft access logoConnect Microsoft Access to Hive with ODBC in Windows

Microsoft Access can be used to connect to Big Data. Cloudera Hadoop cluster is one of Big Data platforms. Those two systems can easily interact with each other by means of an ODBC connection. Microsoft Access natively supports ODBC drivers and Cloudera develops ODBC drivers for many Operation Systems. Hive …

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