- Symantec obtained Veritas Volume Replicator (VVR) via their acquisition of Veritas in 2005
- VVR is a host-based replication software.
- VVR replicates at volume level.
- VVR does not have an integrated snapshot capability. It requires the purchase of FlashSnap agent.
- VVR can be purchase as an option to Veritas Storage Foundation (VSF)
- VVR requires VSF installed on both the source and target servers and convert the data volumes to VSF-managed volumes.
- VVR is a host-based replication software.
- VVR replicates at volume level.
- VVR does not have an integrated snapshot capability. It requires the purchase of FlashSnap agent.
- VVR can be purchase as an option to Veritas Storage Foundation (VSF)
- VVR requires VSF installed on both the source and target servers and convert the data volumes to VSF-managed volumes.
Key Points Analysis
- Delivers host-based replication that places the burden directly on the application server
- Supports only IP. No multiple host-to-appliance interconnects: 2G FC, 4G FC, iSCSI
- Snapshot support is provided with FlashSnap agent which needs to be purchased separately
- VVR requires to restart the entire volume replication if link or disruption is more than 30mins
- VVR require 4KB and above per i/o replication size
- FlashSnap provides application awareness for limited number of applications
- Requires Veritas Storage Foundation (VSF) for volume management
- VSF is required both at the source and target server
- When you purchase VVR, you also need to purchase VSF for each host increasing the cost of the solution significantly
- Heavy duty host software and VSF are disruptive to the environment and requires careful planning to minimize the impact when applying operating systems patches or application patches
- Impacts server resources and likely affects the performance of the application customer is protecting.
- Can only replicate to the same OS. Windows to windows, Linux to Linux, etc.
- No native compression support (requires 3rd party technology)
- No native encryption support
- Replication failure requires a full re-sync of the volume.
- Does not protect the application host operating system environment, only the application data.
- Requires separate products (NetBackup for Bare Metal Recovery)
- Requires several different software pieces in addition to VVR to effectively provide data protection and replication services, i.e. Veritas Storage Foundation (VxFS, VxVM), Cluster Server and FlashSnap, etc
- All of the software products running on the host adds complexity and affects the performance of the host server
- In addition to the cost of purchasing all of the software products, management of these software products in each host is complex and the complexity increases as the number of host increases
- Supports only IP. No multiple host-to-appliance interconnects: 2G FC, 4G FC, iSCSI
- Snapshot support is provided with FlashSnap agent which needs to be purchased separately
- VVR requires to restart the entire volume replication if link or disruption is more than 30mins
- VVR require 4KB and above per i/o replication size
- FlashSnap provides application awareness for limited number of applications
- Requires Veritas Storage Foundation (VSF) for volume management
- VSF is required both at the source and target server
- When you purchase VVR, you also need to purchase VSF for each host increasing the cost of the solution significantly
- Heavy duty host software and VSF are disruptive to the environment and requires careful planning to minimize the impact when applying operating systems patches or application patches
- Impacts server resources and likely affects the performance of the application customer is protecting.
- Can only replicate to the same OS. Windows to windows, Linux to Linux, etc.
- No native compression support (requires 3rd party technology)
- No native encryption support
- Replication failure requires a full re-sync of the volume.
- Does not protect the application host operating system environment, only the application data.
- Requires separate products (NetBackup for Bare Metal Recovery)
- Requires several different software pieces in addition to VVR to effectively provide data protection and replication services, i.e. Veritas Storage Foundation (VxFS, VxVM), Cluster Server and FlashSnap, etc
- All of the software products running on the host adds complexity and affects the performance of the host server
- In addition to the cost of purchasing all of the software products, management of these software products in each host is complex and the complexity increases as the number of host increases
No comments:
Post a Comment