To ensure a healthy use of snapshots in vSphere virtualized environments, VMware provides several best practices:. The original virtual disk is set as read-only and, if the VM is running, there will be two more associated files — the VM saved state.
Figure 2. Checkpoints in Hyper-V Manager. Storage snapshots are a great framework to leverage as part of a backup job. There are a few points to cover here as well:. Snapshots are a short-term solution to be used mostly in testing and development environments for patching, updates, or to test things quickly and rollback in case of failure. They are less recommended in production. However, there are certain scenarios where snapshots really come in handy for the production environment.
For example, if you take risky actions, such as an OS update or configuration changes that could harm your system, then snapshots are a good idea. Mainly for data integrity reasons. Another reason is performance-based. Snapshots can impact the performance of VMs.
This does not happen very often — this occurs only in some particular situations, but it can happen. For example, running highly loaded VMs on aged and thus increased in size snapshots would definitely worsen the performance of those VMs, especially if they use dynamic disks.
It is a common mistake to keep a VM running on a snapshot for a long time — the snapshot will increase in size because it will absorb all the changes, instead of the source disk. Consequently, committing will take much longer and it could even stun the VM during the merge process. Good observation! Backups are standalone copies of your data that aren't connected to the VM and, therefore, offer a full VM copy so a single point of disk failure doesn't equal catastrophic data loss.
Unlike snapshots, VM backups can be moved to the cloud, a separate location, or offsite for safe storage. Beyond using backups as part of a sound business continuity plan, backups can provide granular features that snapshots cannot. Image-level backups offer a variety of recovery options including the ability to recover a entire VM or individual files or applications. Changed block tracking allows you to only back up data that has changed since the last backup so you can save storage space.
Snapshots should not be used for reliable data protection, however, they are a convenient feature to have at your disposal for testing and for a larger part of a backup operation. Backups, on the other hand, can take advantage of multiple storage media types ranging from inexpensive NAS, tape, and cloud. In doing so, restoring from backups loses some of the immediacy of restore in favor of flexibility of placement and retention, which allows for much longer term archival storage schemes.
Additionally, depending on the media type used as a target, backups allow for the air-gapping of the backed up data away from runtime events. This acts as an additional layer of protection and isolation from some malware threats in today's world. In fact, Scale Computing HC3 provides the ability to protect every virtual workload with snapshots to quickly recover in case of an attack.
Of course, hyperconverged systems like HC3 are already well-suited to withstand attacks simply because they more tightly integrate servers, storage, virtualization and data protection features than traditional systems that combine these components from different vendors using open network protocols.
This tight integration reduces the attack surface of the system. So, hyperconvergence is an innovative way to simplify your IT operations and is more effective at protecting data than traditional systems. The HC3 Data Protection Suite built into HC3 provides native backup and disaster recovery capabilities including replication, failover and failback and flexible snapshot scheduling.
As highly available clusters or more cost-effective single appliances, HC3 systems make ideal backup systems for your offsite disaster recovery.
And for users whose requirements go beyond that, we provide Acronis Backup Advanced, expanding backup and recovery options as well as active malware and ransomware protection within and beyond their HC3 system. Easy Normal Medium Hard Expert. Writing code in comment?
Please use ide. Load Comments. What's New. Most popular in DBMS. Most visited in Difference Between.
0コメント