Cloud Storage

The disasters could occur unexpectedly and it could take down the whole data center in an application region. In the real world, a well designed disaster recovery solution would help restore the applications and related data at the time of disaster. There are two critical metrics to measure how timely

To access a sharedv4 volume outside of the Portworx cluster, add the allow_ips label to the volume you wish to export, specifying a semi-colon separated list of IP addresses of non-Portworx nodes you wish to mount your sharedv4 volume to: $ /opt/pwx/bin/pxctl -j volume create datavol --sharedv4

OpenZFS The OpenZFS project is an open source derivative of the Oracle ZFS project. OpenZFS is an outstanding storage platform that encompasses the functionality of traditional filesystems, volume managers, and more, with consistent reliability, functionality and performance across all distributions. Source1 Source2 ZFS and ZFS Pooled Storage The ZFS file

Object Storage Object storage, also known as object-based storage, is a strategy that manages and manipulates data storage as distinct units, called objects. These objects are kept in a single storehouse and are not ingrained in files inside other folders. Instead, object storage combines the pieces of data that make

Latency Comparison Numbers (~2012) Conclusion * Disk is much slower than the memory * Avoid the disk seek if possible * Compressing data is worth to consider before sending over network * It takes time to send data between data centers if they are in different regions Reference * https://computers-are-fast.github.io/ * http://research.

Data volumes The volume of data in a single file or file system can be described by a unit called a byte. However, data volumes can become very large when dealing with Earth satellite data. Below is a table to explain data volume units (Credit: Roy Williams, Center for Advanced

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

In this article, we learn to deploy ceph cluster on ubuntu 18.04. Three nodes are used for this study. We target to deploy the most recent ceph release which is called Pacific. With this release, we can use cephadm to create a ceph cluster by bootstrapping on a single

Introduction btrfs is a modern copy on write (CoW) filesystem for Linux aimed at implementing advanced features while also focusing on fault tolerance, repair and easy administration. Its main features and benefits are: * Snapshots which do not make the full copy of files * RAID - support for software-based RAID 0,

RAID stands for Redundant Array of Inexpensive (Independent) Disks. On most situations you will be using one of the following four levels of RAIDs. * RAID 0 * RAID 1 * RAID 5(6) * RAID 10 (also known as RAID 1+0) RAID 0 Following are the key points to remember for RAID

What is Gluster? Gluster is a scalable, distributed file system that aggregates disk storage resources from multiple servers into a single global namespace. Advantages * Scales to several petabytes * Handles thousands of clients * POSIX compatible * Uses commodity hardware * Can use any ondisk filesystem that supports extended attributes * Accessible using industry standard