How to build an availability solution for remote offices
We have all heard about fantastic new datacentre technologies, but all too often it looks like these technologies only seem to apply to the largest organisations with a wealth of centralised resources. Because data does not just live in the datacentre, we often face daily challenges when data is put to use in the field at remote offices and branch offices.
Business and IT leaders need to recognise the unique needs of remote and branch offices. For instance, teams based in remote offices need constant, reliable and fast access to essential data, without sacrificing data security and integrity. A challenge for IT leaders is how to ensure that data is available, even without a dedicated local IT team to govern and control it.
Industry reports showed that half of the respondents only test backups on a monthly basis, or even less frequently. Long gaps between testing increase the chance of issues being found when data needs to be recovered – at which point it may be too late for these organisations. And out of those who do perform such tests, just 26% test more than 5% of their backups. This means that the vast majority of backups are not verified and could fail. The percentage is even higher when it comes to remote and branch office locations.
The good news for remote and branch offices is that it is now easier than ever — with the help of the right solutions — to extend datacentre backup, replication and availability capabilities all the way out to the edges of an entire organisation.
So, how can remote and branch offices achieve excellent levels of availability without facing complexity?
The modern datacentre has three key attributes:
Each of these attributes is critical to a remote and branch office’s success. However, because of each remote and branch office’s specific needs, there are no real roadmaps for building and implementing architecture for a remote office.
Virtualisation has a huge impact on remote and branch offices. From reduced equipment footprints and lower setup costs, to simpler management workloads and faster deployment of new services, virtualised environments have become the natural choice for remote and branch offices.
Modern storage systems have also made life a lot easier for remote and branch offices. Whether it is a new solution rolled out to serve every branch or a solution that is just deployed on site, new storage solutions are helping remote and branch offices store — and what is more important, backup and replicate — their data more intelligently.
The cloud is now a suitable option to move and store backup and replicated data, unlike the leased private lines that are often a significant performance bottleneck to perform this task. Many organisations struggle to select the best solutions for on-site and off-site backup, because there really is not a one-size-fits-all approach for remote office architecture.
Organisations often end up choosing between taking on-site backups, writing backups off-site or doing replicas both on and off-site, instead of considering how they could utilise them all.
- 3-2-1 rule can address any scenario by ensuring data is backed up in multiple locations and recoverable
- A hybrid solution merges advantages of on-site backup with high availability offered by off-site replication
- Backups do not offer same speed for recovery time but are portable and require lower storage
- Because of each remote office’s needs there are no roadmaps for architecture
- Budgetary constraints often just allow for use of backups
- Cloud is now suitable option to move and store backup and replicated data
- It is widely understood and accepted that no two locations ever look exactly same
- Organisations struggle to select best solution for on-site and off-site backup because there really is no one-size-fits-all approach
- Real challenge is finding right solutions for rolling out across diverse remote office environments
- Remote offices need reliable and fast access to data without sacrificing security and integrity
- Replication grants the greatest availability benefits for remote and branch offices because of fast recovery times
- Replication needs higher investment when it comes to storage and computing power at the disaster recovery site
- Setting up replicated virtual machines grants business continuity but requires higher investment
- There is a long-promoted 3-2-1 rule for availability that can be best solution
- There should be: 3 copies of data, on 2 different media, with 1 off-site
- With a large number of sites and locations, companies need to make a choice about where to do their backups and replication
There is the long-promoted 3-2-1 rule for availability that can be the best solution in this situation. It states that there should be: 3 copies of important data, on 2 different media, with 1 off-site.
The 3-2-1 rule is highly versatile and can address just about any failure scenario imaginable by ensuring that all data is both backed up in multiple locations, and also quickly recoverable. This approach means that companies do not have to worry about getting locked into any particular technology or specific vendor and can stay flexible as their IT environment evolves and expands.
Replicas are more suitable than backups in true disaster situations, when the recovery time objective needs to be reduced to a minimum and all production loads need to be moved to another site in the least amount of time possible. Replicated virtual machines are inventoried and ready-to-run in their own right, so when the worst happens, they can be failed over very quickly on dedicated and similar hardware that’s pre-deployed on the disaster recovery site.
This is why replication needs a higher investment when it comes to storage and computing power at the DR site. Backups do not offer the same speed for recovery time objectives, but are more flexible and portable and require lower storage consumption.
Backups can be copied on different support media and are much more manageable when addressing day-to-day recovery scenarios typical in remote and branch office environments.
With a large number of sites and locations, companies need to make a choice about where to do their backups and replication. This can be a challenge because some sites may require replicas, others may need backups as well, and they all need to have their individual specifications and requirements considered.
Having backups taken on-site provides some important benefits:
- backup times are fast because no information needs to be sent off-site
- restore times are fast because all data is very close to the host
- new replication features open up new options such as creating a backup file and replicating a running virtual machine at the same time
Unfortunately, the best solutions for a remote office rarely line up to what most companies can afford to implement. It is widely understood and accepted that replication grants the greatest availability benefits for remote and branch offices because of the fast recovery times, but budgetary constraints often just allow for the use of backups.
Generally speaking, setting up backups is a very versatile and cost-effective solution. Setting up replicated virtual machines grants prompt business continuity, but requires a higher infrastructure investment.
The real challenge is finding the right solutions for rolling out across diverse remote office environments. No two locations ever look exactly the same. They often are designed and deployed on different dates and include their own individual requirements. This challenge can make it very difficult to roll out global backup and recovery policies across an entire organisation. It can also lead to increased inefficiencies and longer restore times.
With a cost-effective hybrid solution in place that merges the advantages of on-site backup with the high availability and security offered by off-site replication, IT leaders can take control of this complex environment. They can ensure that everybody plays by the same rules and, regardless of the location, can recover data as quickly as the datacentre at headquarters.
A suitable mix of backup and virtual machine replication may be best solution for remote offices, argues Rawad Zaki at Veeam Software.