ZFS on RHEL7 CentOS 7

ZFS, the short form of Zettabyte Filesystem is an advanced and highly scalable filesystem. It was originally developed by Sun Microsystems and is now part of the OpenZFS project. With so many filesystems available on Linux, it is quite natural […]

Installing ZFS on RHEL 7 CentOS 7

Instructions By default, ZFS is not available in the standard CentOS repository. We will need to include some 3rd party repositories here. sudo rpm -Uvh http://www.elrepo.org/elrepo-release-7.0-2.el7.elrepo.noarch.rpm sudo rpm -Uvh http://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm sudo rpm -Uvh https://forensics.cert.org/cert-forensics-tools-release-el7.rpm sudo rpm -Uvh http://download.zfsonlinux.org/epel/zfs-release.el7_6.noarch.rpm sudo yum […]

ZFS Performance: Mirror vs RAIDZ vs RAIDZ2 vs RAIDZ3 vs Striped

Performance difference among different ZFS types, such as mirror, RAIDZ, RAIDZ2, RAIDZ3, Striped, two RAIDZ vdevs vs one RAIDZ2 vdev etc… Background CPU: Intel(R) Core(TM) i7-4770 CPU @ 3.40GHz / quard cores / 8 threads OS: CentOS Linux release 7.3.1611 […]

How to fix ZFS after updating to a newer kernel

Step 1: Clean up and Reinstall DKMS Modules Most of the time, the ZFS on Linux messes up the DKMS modules after the update. I suggest to clean up and reinstall DKMS modules once again. As of December 12, 2018, […]

Improving ZFS performance

A Good 64-bit CPU + Lots of Memory Traditionally, we are told to use a less powerful computer for a file/data server. That’s not true for ZFS. ZFS is more than a file system. It uses a lot of resources […]

mysql 8.0 task list

# mysql [-h hostname] -u root -p Create a database mysql> create database [databasename]; List all databases . mysql> show databases; Switch to a database mysql> use [db name]; List tables in the db. mysql> show tables; To see database’s […]

Gluster Admi Commands (GlusterFS)

GlusterFS Overview of GlusterFS administration Add/Remove Peers # Add peer gluster peer probe <host name> # Remove peer gluster peer detach <host name> Cluster Status You can list the status of all known peers by running. gluster peer status gluster peer info […]