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Upgrade Linux kernel on CentOS 7

Upgrade Linux kernel on CentOS 7

Before upgrade $ cat /etc/centos-release CentOS Linux release 7.4.1708 (Core) $ uname -r 3.10.0-693.el7.x86_64 $ cat /boot/grub2/grubenv saved_entry=CentOS Linux (3.10.0-693.el7.x86_64) 7 (Core) Install the newer kernel package $ rpm -ivh kernel-ml-5.7.12-1.el7.elrepo.x86_64.

Uninstall ceph storage cluster

Uninstall ceph storage cluster

General steps for system performance analysis

General steps for system performance analysis

Using AWS CLI to manage EBS volumes

Using AWS CLI to manage EBS volumes

Analyze Cockroach performance from the built-in DB console

Analyze Cockroach performance from the built-in DB console

Flame Graph and stack trace visualization

Flame Graph and stack trace visualization

Why performance tools need BPF

Why performance tools need BPF

Introduction to BPF performance tools

Introduction to BPF performance tools

Getting started with bpftrace

Getting started with bpftrace

How to install BCC on Ubuntu 22.04

How to install BCC on Ubuntu 22.04

YCSB benchmark on PostgreSQL

YCSB benchmark on PostgreSQL

Linux

Upgrade Linux kernel on CentOS 7

Upgrade Linux kernel on CentOS 7

Before upgrade $ cat /etc/centos-release CentOS Linux release 7.4.1708 (Core) $ uname -r 3.10.0-693.el7.x86_64 $ cat /boot/grub2/grubenv saved_entry=CentOS Linux (3.10.0-693.el7.x86_64) 7 (Core) Install the newer kernel package $ rpm -ivh kernel-ml-5.7.12-1.el7.elrepo.x86_64.

How to install BCC on Ubuntu 22.04

How to install BCC on Ubuntu 22.04

Install GCC from source

Install GCC from source

How to install GUI desktop on CentOS 7

How to install GUI desktop on CentOS 7

Using signals with kill command in Linux

Using signals with kill command in Linux

Using cgroups to limit block device bandwidth

Using cgroups to limit block device bandwidth

Using cgroups to limit Memory usage

Using cgroups to limit Memory usage

Using cgroups to limit CPU utilization

Using cgroups to limit CPU utilization

How to delete partition in Linux

How to delete partition in Linux

Install golang from source

Install golang from source

Limit usable memory size in Linux grub

Limit usable memory size in Linux grub

Big Data

Getting started with PostgreSQL

Getting started with PostgreSQL

PostgreSQL is a powerful, open source object-relational database system that uses and extends the SQL language combined with many features that safely store and scale the most complicated data workloads.

Using ANOVA in R to analyze US COVID data to understand age impact to death rate

Using ANOVA in R to analyze US COVID data to understand age impact to death rate

Using R to analyze US COVID pandemic waves and peaks

Using R to analyze US COVID pandemic waves and peaks

Using R to analyze the quarterly US COVID data

Using R to analyze the quarterly US COVID data

Getting started with R

Getting started with R

Using virtctl to access virtual machine in Kubernetes

Using virtctl to access virtual machine in Kubernetes

Using node selector to assign virtual machines to a node

Using node selector to assign virtual machines to a node

Deploy application with kubernetes statefulset

Deploy application with kubernetes statefulset

Keep a docker container running and not exiting

Keep a docker container running and not exiting

Pull an image from a private docker registry in Kubernetes Pod

Pull an image from a private docker registry in Kubernetes Pod

Deploy kubernetes statefulset with affinity

Deploy kubernetes statefulset with affinity

Benchmarking

YCSB benchmark on PostgreSQL

YCSB benchmark on PostgreSQL

go-ycsb is a Go port of YCSB. It fully supports all YCSB generators and the Core workload so we can do the basic CRUD benchmarks with Go.

Surprised! How can the write IOPS be 10x faster than the cloud native disk performance

Surprised! How can the write IOPS be 10x faster than the cloud native disk performance

fio direct I/O error with 1k blocksize

fio direct I/O error with 1k blocksize

Use sysbench for CockroachDB performance benchmarking

Use sysbench for CockroachDB performance benchmarking

CockroachDB performance benchmarking

CockroachDB performance benchmarking

Benchmarking Elasticsearch cluster with Rally

Benchmarking Elasticsearch cluster with Rally

Getting started with Elastic Rally benchmark

Getting started with Elastic Rally benchmark

Overwrite the Elastic Rally track parameters

Overwrite the Elastic Rally track parameters

Key concepts in Elastic Rally

Key concepts in Elastic Rally

go-ycsb load db terminated with message 'Got signal [hangup] to exit'

go-ycsb load db terminated with message 'Got signal [hangup] to exit'

YCSB performance benchmark on CockroachDB

YCSB performance benchmark on CockroachDB

Performance

General steps for system performance analysis

General steps for system performance analysis

This post tries to provide general steps for system performance analysis. We are going to cover the following objectives. * The performance goals * Workload characterization * Drill-down analysis * Traditional performance tools * BCC/BPF performance tools The Goals of performance analysis In general, the goals of performance analysis are to improve end-user performance

Analyze Cockroach performance from the built-in DB console

Analyze Cockroach performance from the built-in DB console

Flame Graph and stack trace visualization

Flame Graph and stack trace visualization

Why performance tools need BPF

Why performance tools need BPF

Introduction to BPF performance tools

Introduction to BPF performance tools

Getting started with bpftrace

Getting started with bpftrace

Getting started with BCC (BPF Compiler Collection)

Getting started with BCC (BPF Compiler Collection)

Using systemtap to analyze latency of the kernel module function

Using systemtap to analyze latency of the kernel module function

Getting started with systemtap for Linux system profiling

Getting started with systemtap for Linux system profiling

Using ftrace to analyze latency of the kernel module function

Using ftrace to analyze latency of the kernel module function

Dynamically tracing with user-defined tracepoint in perf

Dynamically tracing with user-defined tracepoint in perf

Cloud Storage

Uninstall ceph storage cluster

Uninstall ceph storage cluster

Check the pools, images and OSDs [ceph: root@host1 /]$ ceph osd tree ID CLASS WEIGHT TYPE NAME STATUS REWEIGHT PRI-AFF -1 83.83411 root default -3 27.94470 host host1 0 ssd 3.49309 osd.0 up 1.00000 1.00000 1 ssd 3.49309 osd.1 up 1.00000

Using AWS CLI to manage EBS volumes

Using AWS CLI to manage EBS volumes

Understanding Azure disk bursting

Understanding Azure disk bursting

Understanding RPO and RTO

Understanding RPO and RTO

Access a sharedv4 volume outside of a Portwrox cluster

Access a sharedv4 volume outside of a Portwrox cluster

OpenZFS - A pooled storage file system

OpenZFS - A pooled storage file system

Storage concepts you should know

Storage concepts you should know

Latency numbers

Latency numbers

Data volume unit

Data volume unit

How to uninstall ceph storage cluster

How to uninstall ceph storage cluster

Deploy ceph cluster on Ubuntu 18.04 and CentOS 7.8

Deploy ceph cluster on Ubuntu 18.04 and CentOS 7.8

Programming

More

A six-step framework to tackle any system design question

The complete guide to System Design

AngularJS table creation for dynamic number of columns

Hide and display html elements

Scale a system to support millions of users

Blog

More

How to redirect the default "404 page not found" error page in Ghost blog

Hosting the Ghost blog on GitHub

Create Image Gallery in Jekyll without Plugin

Sublime Jekyll Package

Start jekyll with systemd service

Investment

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Tracking stock financial metrics in tradingview