Tuesday, 29 January 2013

Time spent on data recovery

No one actually tells you how long does it take. 
  • Trivial small-size case takes two hours. Let's say it is flash-based media (never a hard drive), less than 200GB.
  • Trivial medium size takes two days. That is, any type of drive with no RAID.
  • Trivial big case takes a week or more to recover. This means RAIDs upwards of 4TB.
The above estimations account for DIY operation, time needed to hurriedly source whatever parts may be needed, aseemble the setup as required, do recovery and copying.
However, the estimations do not account for possible mistakes and resets in the recovery. In a trial-and-error process,
  •  every error-and-restart cycle doubles processing time.

Wednesday, 2 January 2013


Been reading DevOps Borat today. Some infinite wisdom in there

Only 10% in devops are know how of work with Big Data. Only 1% are realize they are need 2 Big Data for fault tolerance.

Worst failure in devops are happen in high availability architectures (also know as Paradox of RAID Controller Failure)

In startup we are allow all developer use 20% of time for write code with not TDD so they can able of actual get shit done