Veritas InfoScale™ 7.4.1 Release Notes - Linux
- Introduction
- Requirements
- Changes introduced in 7.4.1
- Changes related to installation and upgrades
- Changes related to security features
- Changes related to supported configurations
- Changes related to InfoScale in cloud environments
- Changes related to Cluster Server agents
- Changes related to Veritas Volume Manager
- Changes related to Veritas File System
- Changes related to replication
- Fixed issues
- Limitations
- Virtualization software limitations
- Storage Foundation software limitations
- Dynamic Multi-Pathing software limitations
- Veritas Volume Manager software limitations
- Veritas File System software limitations
- SmartIO software limitations
- Replication software limitations
- Cluster Server software limitations
- Limitations related to bundled agents
- Limitations related to VCS engine
- Veritas cluster configuration wizard limitations
- Limitations related to the VCS database agents
- Cluster Manager (Java console) limitations
- Limitations related to LLT
- Limitations related to I/O fencing
- Limitations related to bundled agents
- Storage Foundation Cluster File System High Availability software limitations
- Storage Foundation for Oracle RAC software limitations
- Storage Foundation for Databases (SFDB) tools software limitations
- Storage Foundation for Sybase ASE CE software limitations
- Known issues
- Issues related to installation and upgrade
- Storage Foundation known issues
- Dynamic Multi-Pathing known issues
- Veritas Volume Manager known issues
- Virtualization known issues
- Veritas File System known issues
- Replication known issues
- Cluster Server known issues
- Operational issues for VCS
- Issues related to the VCS engine
- Issues related to the bundled agents
- Issues related to the VCS database agents
- Issues related to the agent framework
- Cluster Server agents for Volume Replicator known issues
- Issues related to Intelligent Monitoring Framework (IMF)
- Issues related to global clusters
- Issues related to the Cluster Manager (Java Console)
- VCS Cluster Configuration wizard issues
- LLT known issues
- I/O fencing known issues
- Operational issues for VCS
- Storage Foundation and High Availability known issues
- Storage Foundation Cluster File System High Availability known issues
- Storage Foundation for Oracle RAC known issues
- Oracle RAC known issues
- Storage Foundation Oracle RAC issues
- Storage Foundation for Databases (SFDB) tools known issues
- Storage Foundation for Sybase ASE CE known issues
- Application isolation feature known Issues
- Cloud deployment known issues
- Issues related to Veritas InfoScale Storage in Amazon Web Services cloud environments
- Issues related to installation and upgrade
Technology preview: Adaptive synchronous mode in VVR
When the synchronous attribute of the RLINK in VVR is set to override, the system temporarily switches the replication mode from synchronous to asynchronous whenever RLINK is disconnected. The override option allows VVR to continue receiving writes from the application even when RLINK is disconnected. However, in case of high network latency, replication continues to run in synchronous mode with degraded application performance.
The adaptive synchronous mode in VVR is an enhancement to the existing synchronous override mode. In the adaptive synchronous mode, replication switches from synchronous to asynchronous based on cross-site network latency. This allows replication to take place in synchronous mode when network conditions are good, and automatically switch to asynchronous mode when there is an increase in cross-site network latency.
threshold for switching to asynchronous mode (percentage of timed-out occurrences)
time interval for which threshold is calculated
time interval for which the system must remain in asynchronous mode before switching back to synchronous mode
You can also set alerts for when the system undergoes prolonged periods of network deterioration. For more information, see the Veritas InfoScale Replication Administrator's Guide - Linux.