Welcome to Myhandyresources
This is my site for all things relating to Information Technology (IT) and Web development.
I have been working in the IT industry for over 25 years now, primarily as a UNIX administrator but for the last 7 years I have been working as a SAN System Engineer.
Over the years I have been involved in many projects, these include:
I am always looking forward to new challenges within the IT industry especially with the current fast pace that technology is changing.
I Hope you enjoy my website.
Storage Area Networks (SAN) are currently going through a revolution and customers have some technical challenges ahead.
Some applications need to remain with the traditional style Fibre Channel Storage Arrays, new virtualised or cloud environments have several choices when it comes to technology.
Customers now have a choice of traditional FC based storage or moving to “converged networks” which combines traditional network traffic with Block storage traffic. The big vendors are producing network switches that combine IP data and FCoE (FC over Ethernet) traffic.
The backbone of the SAN has been based on dedicated FC switches and directors but the new era of Cloud computing brings “converged networks”, Server-SAN and VSAN.
Vendors have been moving away from FC backend buses to SAS buses, latest storage arrays utilize SSD, SAS, and NL-SAS (SATA) disks.
EMC and IBM both have dedicate hardware offerings for Virtualised Storage, these systems sit between the host clients and the storage providing a virtual layer. This enables the SAN administrator to provision storage from any backend array and enable them to easily migrate volumes to another array for performance or obsolescence without impacting the connected hosts.
The EMC VPLEX two main features are:
More to come on emerging technologies…
In the past many companies only backed up their data for disaster recovery purposes, nowadays IT departments realize that a large percentage of the companies data is static and must be archived for long term preservation; either for security or Legal requirements.
A continuous analysis of your data is needed before deciding whether to use Backups or an Archive service.
Example: A customer was saving data from a growing filesystem using traditional backups, 2 yrs later and 2TB of static data was being backed up every weekend (3x LTO tapes) which was retained for 1-5yrs (150 Tapes a year). After changing over to using an archive service only 20GB a week was copied to tapes (6 Tapes a year). A huge saving in media and offsite storage costs.
Most popular backup software used by companies is Symantec Netbackup or EMC Legato, these provide server software that communicates over Ethernet network to software installed on the client.
Most modern backup software also provide backups via the SAN reducing the time that applications need to be offline, Storage snapshots can be deployed and the backups made at the server; releasing the client from any I/O load.
Companies are amassing large amounts of data that never changes but has to be kept (i.e. photos, legal documents), to preserve this data and free up expensive storage companies are using Archive facilities.
The purpose of the archive service is to make copies of the data on inexpensive media that can be stored in a secure location, also to allow users fast access to recover the data if needed.
Archive data should always be written to multiple media types (LTO, Storage T10K, IBM 3592), for instance one of my customers archives data to the following media:
LinkedIn: David Richards