Understanding the Dangers of Cloud Data Loss

The adoption of cloud computing has been at a moderate pace regardless of having plethora of cloud service providers providing numerous elements of cloud computing services. One of the primary factors of this is the concerns more than loss of data in the cloud exactly where the cloud service clients do not have any control on exactly where it gets stored and how it is secured. Nevertheless there are specific measures that significantly reduce, if not rule out, the possibility of information loss on the cloud. The onus of taking measures to stay away from attainable cloud data loss is on each the cloud service provider and also the cloud service user.

In the sections beneath, let us assessment the elements of cloud data loss/information unavailability mentioning some real life cloud outages observed in the current years. Method to handing attributes like data backup, redundancy and protection may indirectly lead to risky scenarios of information loss or information unavailability as we will go over shortly.

Cloud Storage – Information unavailability

Cloud storage is the concept of hosting the networked storage at a service provider’s data center(s) and making it accessible through web based interfaces (APIs) ubiquitously on a pay-per-use model by signifies of a connection to the internet. Naturally storage on the cloud takes away the overhead of managing storage infrastructure in-residence. However there are inherent dangers of unavailability of information hosted on cloud even at the very best of the service levels. This unavailability might be transient – as in information is not accessible temporarily, or could be permanent – as in complete information loss due to serious outage at the cloud storage provider’s premises.

There are two distinct kinds of problems causing information loss/information unavailability – one is due to natural calamities such as lightening, storms or earthquakes causing power failures, external network connectivity failures and so on. resulting in damage to the cloud information centers and the data an additional is due to human errors in configuration, upkeep operations or unhandled exceptional failure scenarios in the automated scripts that are meant to assistance the failure recovery processes. In any case the bottom line is the impact to the customer enterprise, minor or key, depending upon the sort of cloud storage service becoming utilized.

Cloud service outages

There have been several outages reported in the recent past by almost all significant cloud storage vendors. Most of them, caused in the cloud service providers’ premises, were transient with no loss of data and had been brought on by configuration errors or hardware failures (Disruptions to e-mail services supplied by Google, Microsoft, Yahoo and the downtime of on the internet services provided by AWS, Intuit, Salesforce.com) however there are instances of outage causing permanent loss of user information (Refer to the associated InfoWorld article on Microsoft losing sidekick users private information). Such occurrences raise questions on the viability of cloud computing. Nevertheless in most of the instances, implementing greatest practices exhaustively across the cloud service providers’ premises and periodic audits to guarantee compliance will drastically reduce the possibilities of outages due to configuration errors.

A latest outage at AWS information center in Europe was root-triggered to have occurred since of power failure the backup power provide could not kick off in time due to a technical failure causing disruption of services. A huge number of storage volumes had to be recovered making use of offsite storage which took considerable time for recovery of services. Summary right here is that occasionally the components meant to give high availability might fail causing information unavailability. A cloud storage internet site should be equipped with extra backup power to stop failure in case of a power outage.

Cloud based backup

A well-known use case of cloud storage is the data backup. It has price positive aspects in terms of relieving a single from the infrastructure maintenance overhead and gives the capacity to elastically scale the storage based on needs with out getting to procure any hardware / software. Nevertheless there are certain limitations that need to have to be addressed. When the data to shop in the cloud is of the order of hundreds of gigabytes, then the organization (or even the individual user for that matter) requirements to rethink of their selection to use cloud storage. The world wide web service providers mostly impose limits on consumption of bandwidth or capped usage. In such a situation, the restore time for retrieving such large data on a limited bandwidth world wide web connection takes ages, defeating the complete objective of cloud backup. Hence the size of information and the restore time are essential aspects to be taken into account ahead of utilizing cloud based storage backup services.

In order to leverage the cloud storage model, different approaches can be regarded. 1st, one can preserve a copy of information locally on the disk ahead of pushing the information on to cloud storage for backup. This approach ensures that the information becoming backed up is readily obtainable locally on the servers for quicker restores when needed. Second, in addition to getting cloud storage from one vendor, it is advisable to opt for an additional cloud storage vendor for replication of backup information, to account for the case of information loss from the initial cloud vendor however remote the possibility may possibly be. Certainly these alternatives will drive the fees up but it is worth the effort to have readily available data recovery selection.

Data Redundancy

The cloud storage services are usually supplied with numerous levels of redundancy at diverse price points. Based on the sort and the criticality of data getting stored on cloud, the organizations require to decide upon the level of redundancy required. Higher redundancy always implies a greater premium but at the very same time, reduced redundancy usually signifies lower expenses but better dangers of data loss. Hence the organizations should strike a balance amongst the price and the risk.

Data Protection

Most of the cloud storage vendors have some mechanism or the other to protect the information in transit and the information at rest. Information encryption is 1 common mechanism to shield sensitive data from malicious use. Modern day encryption tactics offer solid protection to the client information in the cloud. Encryption important management ought to be robust as it is a extremely vital aspect that can either result in the best achievable information protection or the worst possible data loss. A correctly managed encryption important mechanism offers the strongest protection such that no unauthorized individual can see the information. The flip side of the scenario is when the encryption keys of a genuine consumer are lost or corrupted, in which case the data is not accessible forever and hence lost!! To address this type of scenarios, some cloud storage providers offer you mechanism to defend the encryption keys by encrypting the key itself (Nasuni Crucial Escrow, for example). The cloud storage clients should opt in for such a mechanism to keep away from inadvertent loss of their beneficial information.

To conclude, the cloud storage options are feasible economically for organization, but the caveats with respect to data loss scenarios mentioned above need to be nicely understood and handled accordingly by each the cloud storage providers and the cloud storage clients as applicable.