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Wait, why shouldn’t you get RTO and RPO to zero or near-zero?
Well run IT organizations utilize data protection best practices to evaluate the risk of data loss and establish IT Resilience (ITR) policies to ensure business continuity. CIOs and IT managers must start with a common understanding of what is RPO and RTO in storage, regarding backup and disaster recovery.
Recovery Point Objective (RPO) and Recovery Time Objective (RTO) are two of the most critical parameters of a data protection plan and disaster recovery strategy. These measurements are related and necessary to application and data availability. Despite their similarities, RPO and RTO serve different purposes and come with different metrics.
Everyone knows that email is a business-critical application that can only be unavailable for an hour or more before most businesses will record productivity loss. (Employee complaints are another story.) However, a customer transaction database may be unavailable for under two minutes before demonstrating financial and reputational damage.
It is best practice need to match recovery time and point objectives (RTPO) to the application priority. For rare mission-critical applications, minimizing risk may require zero/near–zero RPOs and RTOs – despite the expense.
The best way to achieve zero/near-zero RPO and RTO is synchronous mirroring. It works by synchronously writing I/O from the primary storage media to a second mirrored system, and waiting on acknowledgment before writing the next I/O set from primary to the mirrored system. The secondary copy is then stored in an active state for immediate recovery, think high-availability (HA) in a dual-node clustered server.
This processing-intensive configuration needs high-performance storage systems and maximum bandwidth to minimize performance impacts, which adds management, time, and expense. Additional layers such as database systems, clustering hardware and software, and native database replication features add more cost and complexity. Each layer requires IT experts to configure, integrate, and manage within the RTO/RPO infrastructure.
Achieving zero/near-zero in this environment is possible but not easy. Still, synchronous replication is the best option for high transactional, mission-critical applications because it does not require data movement, rehydration, or waiting. It’s highly successful and expensive means of achieving zero/near-zero recovery objectives.
What about business-critical applications then? It’s overkill to pay for zero/near-zero RPO and RTO for most applications. However, the average length of recovery objectives is far too long for business-critical applications.
Let’s look at two possibilities that should cover most business applications: zero/near-zero RPO and RTO for the most mission-critical applications, and RTP and RPO of just 15 minutes for everything else that needs short objective times.
If you can get that RPO/RTO down to 1 hour at the slowest speeds or 15 minutes at highest, you will achieve quick recovery times and posts for most of your applications. According to George Crump of Storage Switzerland, the “secret” is in-place recoveries for RTO and change block backups for RPO.
You will still want to assign a frequency of block backups and decide on priority data to cache, so not every RPO or RTO will be 15 minutes or less. However, you certainly can achieve 15 minutes with the applications that need them, and an hour or less for the rest at a very reasonable price.
How much time and data can a business save? A Veeam survey on RPO and RTO, “Using Veeam in the New Race to Zero: Customer Survey Results”, reported that respondents reduced restore time by 77%, and saved 10.2 hours per year of downtime in their virtual environments. According to IDC, enterprises average $100,000 cost per downtime hour. Veeam’s customer survey demonstrates that new RPO and RTO technologies deliver better recovery objectives at a much lower cost.
There are on-demand clouds that offer-up a DIY environment, and then there are custom cloud service providers that can do it all — without the hidden costs. One indication that the vendor does it all is that they are willing to provide DRaaS and custom SLAs to meet an IT resilience policy. If your data backup and recovery cloud cannot do that, then you need to revisit your data protection plan to obtain a solution custom crafted to provide measurable, trustworthy, and repeatable RPO and RTO metrics.
The KeepItSafe cloud is in rare air in its ability to provide the support, expertise, and agility required to deliver cloud backup, DRaaS, and IT Resilience. Whether you are a small business, a mid-market company, or a Fortune 1000 enterprise, KeepItSafe has the backup and recovery features that will meet your specific needs. And best of all, you can experience all the cost-saving features and time-saving benefits of KeepItSafe by starting with a 30-day trial.
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“Storage Switzerland details DR Planning from Good to Great”