Zerto vs vSphere Replication (focusing around data replication)
|Zerto Replication||vSphere Replication|
|Generally recommended for:||Any size vSphere infrastructure||Small infrastructures, remote offices, and non-critical applications|
|Max number of VMs protected per appliance and vCenter Server:||500/5000||500/500|
|Linked clone and template support:||Yes||No|
|Physical RDM and Virtual RDM support:||Yes, virtual and physical mode RDMs are supported||No/Yes, Physical RDMs are not supported but virtual RDM are supported|
|RPO range:||Seconds||15 minutes to 24 hours|
|Application consistent?:||Supports Windows VMs using VSS and Linux with Application Quesicense||Only with Windows VMs using VSS|
|How VMs are chosen:||VMs can be organized into Virtual Protection Groups||VMs can be selected individually or multi-select but virtual protection grouping is not available|
|Automated failback support:||Yes||No, VMware recommends SRM|
|Allows you to plan, test, and automate failover and failback:||Yes||No, VMware recommends SRM|
|Compression included:||Yes||No, and neither does SRM|
|RE-IP addressing of virtual machines:||Yes||No, VMware recommends SRM|
|Cloning of recovery sites:||Yes||No|
|Point in time recovery:||Yes, up to 5 days with standard recovery, up to 1 year with extended recovery using the Offsite Backup feature||Yes, up to 24 snapshots|
|Compatible with vApps:||Yes||No|
|vCloud Director integration:||Yes||No|
|Snapshot-based?||No||Yes/No, VMware says that vSR doesn’t use snapshots technology but does use a modified version of CBT, still many of the same snapshot-based limitations apply. For example, vSR uses VM snapshots at the recovery site when recovering to a different point-in-time.|
Zerto vs VMware Site Recovery Manager (focusing around automation of disaster recovery planning, testing, and automation)
|Zerto||SRM (with vSphere Replication)|
|Provides planning, testing, and execution of disaster recovery for vSphere:||Yes||Yes|
|Designed for:||Zerto was designed for hypervisor-based replication AND disaster recovery orchestration||SRM was designed for disaster recovery orchestration only|
|Replication granularity:||Per-VM and/or Per- Virtual Protection Group||Per-VM or multi-select but virtual protection grouping is not available|
|Configure consistency groups (virtual protection groups):||Yes||No|
|Replication recovery points:||Yes, up to 24 snapshots|
|Compatibility:||Zerto works with ESX 4.0 U1 and above. Zerto can replicate between different versions of vCenter.||vSR works with ESX 5.x and above. SRM requires the same version of vCenter and SRM be installed at both sites.|
|Managed with:||vSphere Client Plugin and stand-alone browser UI||vSphere Client Plugin|
|Replication is performed with:||Zerto Hypervisor-based replication||vSphere Replication|
ZCP Certification Exam
Passing mark is atleast 75%, answers are highlighted in bold.
1) After performing a failover operation (Test, Live, Move) Zerto allows you to generate a report detailing the steps performed during the operation.
2) VPGs can only protect virtual machines running Mac OS X or Windows XP and newer.
3) To recover a single VPG after a corrupted database, which of these operations would be most effective?
- Journal file-level restore
- Offsite clone
- Live failover
- Backup restore
4) ZVR’s Journal is stored where?
- Production/source site
- Recovery/target site
5) During a VPG sync, which of the following operations can be performed? Select all that apply.
- Add a VM to the group
- Remove a VM from the group
- Change length of Journal history for the group
- Change hard limit of Journal size for the group
6) Offsite Backups for a VPG should be scheduled to run at least every four hours, but no more than every 12 hours.
7) How much memory can be allocated to a Virtual Replication Appliance?
- 1 GB
- 3 GB
- Between 1-16 GB
- Between 2-8 GB
8) If both sites (target/recovery and source/production) are up, healthy, and accessible, which VPG-level operation is most appropriate?
- Live Failover
- Offsite Clone
9) What basic method does ZVR use to protect data and applications?
- VM-level continuous replication
- Scheduled and on-demand snapshots
- Daily delta syncs
- Guest/agent-based replication
10) ZVR cannot function across different hypervisors, storage configurations, or host OS versions.
11) What must be true for a Move operation to be effective? Select all that apply.
- Both source (or production) and target (recovery) sites are up and accessible
- Each VM in the VPG has an up-to-date Journal
- The very latest copy of the data is required
- One of the site’s hosts has either a new VRA installed or an upgraded VRA
12) A fully configured ZVM on each paired site—e.g. production and recovery—requires which of the following? Select all that apply.
- Adding a site-specific license under Site Settings
- Creating matching VPGs on each site
- Installing VRAs on that site’s host(s)
13) Enabling auto-commit will always provide 30 minutes to validate the results of a failover before committing the changes.
14) ZVR has built-in support for scheduled bandwidth throttling that can work with or without other hardware/software also managing this.
15) What characterizes the kinds of VMs you should group together in the same VPG?
- Each are using the same datastore or volume for storage
- They need to maintain consistency with each other and all be failed over or recovered together
- All are running both the same OS and same hypervisor
- The journal is sized the same on each VM
16) Adding a VM to an existing VPG means… (Select all that apply)
- The entire VPG will be re-synchronized to ensure group consistency
- The VPG protection will need to be paused before adding the additional VM
- A checkpoint will be automatically inserted in the Journal prior to adding the VM
- A Live Failover cannot be executed until the updated VPG is fully synchronized
17) What is the Journal?
- Audit trail to track which operations were performed and when
- Series of checkpoints tracking block-level changes within VMs
- Detailed list of every snapshot, whether automatic or manually generated snapshots
- Compliance record of each VPG’s replication status at any given checkpoint
18) The ZVR installer includes which of the following components? Select all that apply.
- Local copies of the ZVR documentation specific to your hypervisor
- One license key for each site you’ll use with Zerto
- Microsoft .NET Framework in case the machine does not already have it installed
- VRA template for a custom-designed Zerto VM
- A Virtual Backup Appliance (VBA) for managing backups
19) If you needed to test the failover of an entire virtualized datacenter, what best practices should be followed? Select all that apply.
- Perform the test during off hours or on the weekend
- Clone the VPGs you want to test prior to starting the failover test
- Use an isolated/fenced network for testing
- Always stop the test from within ZVM and not your hypervisor’s management console(s)
- Provision a sandbox where ZVR can deploy the test VMs
20) What is a Virtual Replication Appliance?
- Lightweight agent installed on each VM in a protection group
- Snapshot engine that powers the ZVR Journal
- Custom Linux VM performing continuous replication
- A hypervisor plugin/add-on to manage cross-hypervisor replication
21) ZVR 4.5 allows for Journal Compression to increase storage capacity for journal history.
22) If the hypervisor service/admin account provided during installation is incorrect, ZVR will still proceed with the installation and ask for re-validation after installation is complete.
23) When configuring a Failover Test network, what is Zerto’s recommended best practice?
- Test and production network should be the same to ensure consistency
- Test network should be isolated/fenced
- The ZVM should be on a test network
- Pause replication on production network when using a test network during a test
24) What operating system is running on the VRA virtual machine?
- Red Hat Enterprise Linux
- Windows Server 2012
25) What VPG configuration option would give you the ability to stagger when and how your protected VMs start?
- Bandwidth Throttling
- Pre/Post Operation Scripting
- Boot Order Groups
Are you a Master of Disaster? Join the ranks of masters worldwide who have taken our Zerto Certified Professional (ZCP) training and are now using Zerto to minimize data loss and maximize uptime. Zerto has just released our business continuity certification, ZCP Basic for Zerto Virtual Replication (ZVR) 4.5, the latest version of Zerto’s award-winning business continuity software.
ZCP Basic 4.5 is a free introductory technical course that is self-paced and easily accessible online via the MyZerto platform. If you don’t already have an account, sign-up for one here and then log-in to start your training.
The latest ZCP course includes training on some of our exciting new features such as Journal File-Level Restore, ZVR 4.5’s game-changing feature that lets you recover specific folders or simply one single file that was accidentally deleted.
If you are a newbie though, don’t worry, ZCP 4.5 still covers all the tools you need to reach Master of Disaster status, including: ZVR installation, configuration, and key recovery operations such as test & live failovers.
The e-learning in ZCP Basic 4.5 is estimated to take around 1 hour and 15 minutes, and there is a certification exam at the end. Passing the exam with 75% or higher awards you the ZCP Basic business continuity certification—and officially recognizes you as a Master of Disaster, ready to face any outage and manage your IT environment with confidence.
Additionally Zerto is excited to announce that they are taking our training to the next level! This May, at ZertoCON, they will be offering for the first time ever the ZCP Advanced certification exam! So for those of you who are interested in really putting your skills to the test, and looking for official proof of your elite BC/DR status, sign up for ZertoCON now.
(Please note at this time that ZCP is only available to Zerto customers and partners)