I’ve been around computers all my life (OK, since 1977 but that’s almost all my life) and was lucky to get my first computer in 1983.
Over the summer of 1984, I was deeply embroiled in (up to that point) the largest programming project of my life, coding Z80 ASM on my trusty CP/M computer when I encountered the most dreaded of all BDOS errors, “BDOS ERROR ON B: BAD SECTOR”
In its most mild form, this cryptic message simply means “copy this data to another disk before this one fails.” However, in this specific instance, it represented the most severe case… “this disk is toast, kaputt, finito, your data is GONE!!!”
Via the School of Hard Knocks, I learned the value of keeping proper backups that day.
If you’ve been in this game for longer than about 10 milliseconds, it’s probable that you’ve experienced data loss in one form or another. Over the years, I’ve seen just about every kind of data loss imaginable, from the 1980’s accountant who tacked her data floppy to the filing cabinet with a magnet so she wouldn’t misplace it-- all the way to enterprise/mainframe class SAN equipment that pulverizes terabytes of critical data in less than a heartbeat due to operator error on the part of a contractor.
I’ve consulted with thousands of individuals and companies about their backup implementations and strategies, and am no longer surprised by administrators who believe they have a foolproof backup utilizing a secondary hard disk in their systems. I have witnessed disk controller failures which corrupt the contents of all attached disk drives, operator error and/or forgetfulness that leave gaping holes in so-called backup strategies and other random disasters. On the other side of the coin, I have personally experienced tragic media failure from “traditional backups” utilizing removable media such as tapes and/or CD/DVD/etc.
Your data is your life. I’ve waited up until this point to mention this, because it should be painfully obvious to every administrator, but in my experience the mentality is along the lines of “My data exists, therefore it is safe.” What happens when your data ceases to exist, and you become aware of the flaws in your backup plan? I’ll tell you – you go bankrupt, you go out of business, you get sued, you lose your job, you go homeless, and so-on. Sure, maybe those things won’t happen to you, but is your livelihood worth the gamble?
“But Justin… my data is safe because it’s stored on a RAID mirror!” I disagree. Your data is AVAILABLE, your data is FAULT TOLERANT, but it is not SAFE. RAID controllers fail. Disaster happens. Disgruntled or improperly trained personnel type ‘rm –rf /’ or accidentally select the wrong physical device when working with the Disk Manager in Windows. Mistakes happen. The unforeseeable, unavoidable, unthinkable happens.
Safe data is geographically diverse data. Safe data is up-to-date data. Safe data is readily retrievable data. Safe data is more than a single point-in-time instance.
Unsafe data is “all your eggs in one basket.” Unsafe data is “I’ll get around to doing that backup tomorrow.” Unsafe data is “I stored the backups at my house which is also underwater now.” Unsafe data is “I only have yesterday’s backup and last week’s backup, and this data disappeared two days ago.”
SoftLayer’s customers are privileged to have the option to build a truly safe data backup strategy by employing the Evault option on StorageLayer. This solution provides instantaneous off-site backups and efficiently utilizes tight compression and block-level delta technologies, is fully automated, has an extremely flexible retention policy system permitting multiple tiers of recovery points-in-time, is always online via our very sophisticated private network for speedy recovery, and most importantly—is incredibly economical for the value it provides. To really pour on the industry-speak acronym soup, it gives the customer the tools for their BCP to provide a DR scenario with the fastest RTO with the best RPO that any CAB would approve because of its obvious TCR (Total Cost of Recovery). Ok, so I made that last one up… but if you don’t recover from data loss, what does it cost you?
On my personal server, I utilize this offering to protect more than 22 GB of data. It backs up my entire server daily, keeping no less than seven daily copies representing at least one week of data. It backs up my databases hourly, keeping no less than 72 hourly copies representing at least three days of data. It does all this seamlessly, in the background, and emails me when it is successful or if there is an issue.
Most importantly, it keeps my data safe in Seattle, while my server is located in Dallas. Alternatively, if my server were located in Seattle, I could choose for my data to be stored in Dallas or our new Washington DC facility. Here’s the kicker, though. It provides me the ability to have this level of protection, with all the bells and whistles mentioned above, without overstepping the boundary of my 10 GB service. That’s right, I have 72 copies of my database and 7 copies of my server, of which the original data totals in excess of 22 GB, stored within 10 GB on the backup server.
That’s more than sufficient for my needs, but I could retain weekly data or monthly data without significant increase in storage requirements, due to the nature of my dataset.
This service costs a mere $20/mo, or $240/yr. How much would you expect to pay to be able to sleep at night, knowing your data is safe?
Are you missing something? Wait … Backup!