Storage Foundation 8.0 Administrator's Guide - Windows
- Overview
- Setup and configuration
- Function overview
- About the client console for Storage Foundation
- Recommendations for caching-enabled disks
- Configure basic disks (Optional)
- About creating dynamic disk groups
- About creating dynamic volumes
- Set desired preferences
- Using the GUI to manage your storage
- Working with disks, partitions, and volumes
- Adding storage
- Disk tasks
- Remove a disk from the computer
- Veritas Disk ID (VDID)
- General Partition/Volume tasks
- Mount a volume at an empty folder (Drive path)
- Expand a dynamic volume
- Shrink a dynamic volume
- Basic disk and volume tasks
- Automatic discovery of SSD devices and manual classification as SSD
- Volume Manager space allocation is SSD aware
- Dealing with disk groups
- Disk groups overview
- Delete a dynamic disk group
- Detaching and attaching dynamic disks
- Importing and deporting dynamic disk groups
- Partitioned shared storage with private dynamic disk group protection
- Fast failover in clustered environments
- iSCSI SAN support
- Settings for monitoring objects
- Event monitoring and notification
- Event notification
- Configuring Automatic volume growth
- Standard features for adding fault tolerance
- Performance tuning
- FlashSnap
- FlashSnap components
- FastResync
- Snapshot commands
- Dynamic Disk Group Split and Join
- Dynamic disk group join
- Using Dynamic Disk Group Split and Join with a cluster on shared storage
- Dynamic Disk Group Split and Join troubleshooting tips
- Fast File Resync
- Volume Shadow Copy Service (VSS)
- Using the VSS snapshot wizards with Microsoft Exchange
- Using the VSS snapshot wizards with Enterprise Vault
- Using the VSS snapshot wizards with Microsoft SQL
- Copy on Write (COW)
- Using the VSS COW snapshot wizards with Microsoft Exchange
- Using the VSS COW snapshot wizards with Microsoft SQL
- Configuring data caching with SmartIO
- Typical deployment scenarios
- About cache area
- Configuring SmartIO
- Frequently asked questions about SmartIO
- Dynamic Multi-Pathing
- Configuring Cluster Volume Manager (CVM)
- Configuring a CVM cluster
- Administering CVM
- Access modes for cluster-shared volumes
- Storage disconnectivity and CVM disk detach policy
- Unconfiguring a CVM cluster
- Command shipping
- About I/O Fencing
- Administering site-aware allocation for campus clusters
- SFW for Hyper-V virtual machines
- Introduction to Storage Foundation solutions for Hyper-V environments
- Live migration support for SFW dynamic disk group
- Preparing the host machines
- Configuring the SFW storage
- Administering storage migration for SFW and Hyper-V virtual machine volumes
- Optional Storage Foundation features for Hyper-V environments
- Microsoft Failover Clustering support
- Configuring a quorum in a Microsoft Failover Cluster
- Implementing disaster recovery with Volume Replicator
- Troubleshooting and recovery
- Using disk and volume status information
- Resolving common problem situations
- Commands or procedures used in troubleshooting and recovery
- Rescan command
- Repair volume command for dynamic mirrored volumes
- Additional troubleshooting issues
- Disk issues
- Volume issues
- Disk group issues
- Connection issues
- Issues related to boot or restart
- Cluster issues
- Dynamic Multi-Pathing issues
- vxsnap issues
- Other issues
- CVM issues
- Appendix A. Command line interface
- Overview of the command line interface
- vxclustadm
- vxvol
- vxdg
- vxclus
- vxdisk
- vxassist
- vxassist (Windows-specific)
- vxsd
- vxedit
- vxdmpadm
- vxcbr
- vxsnap
- vxscrub
- sfcache
- Tuning SFW
- Appendix B. VDID details for arrays
Statistics overview
The statistics feature of Storage Foundation for Windows provides I/O statistics to let you do performance tuning to improve overall disk and system performance.
Storage Foundation for Windows provides the following statistics parameters:
Read Requests/Second
The number of read requests per second for selected storage objects.
Write Requests/Second
The number of write requests per second for selected storage objects.
Read Blocks/Second
The amount of read request data (in blocks per second) that is processed for selected storage objects. It is the throughput on the read requests made.
Write Blocks/Second
The amount of write request data (in blocks per second) that is processed for selected storage objects. It is the throughput on the write requests made.
Average Time/Read Block
The average time in microseconds that it takes to process a read block from the time a request is made until the data is returned.
Average Time/Write Block
The average time in microseconds that it takes to process a write block from the time a request is made until the data is returned.
Read and Write Requests/Second
The number of read and write requests per second for selected storage objects.
Read and Write Blocks/Second
The number of read and write blocks per second for selected storage objects.
Queue Depth
The current number of read and write requests in the queue for selected disks. It does not apply to volumes and subdisks.
With these statistical tools, you can improve disk and system performance by the following actions:
Identifying high I/O areas that are known as "hot spots."
Moving data among physical drives to evenly balance the I/O load among the disk drives. This is known as "load balancing."
Bottlenecks occur when a program or device uses too much disk I/O, creating a hot spot and degrading performance. By monitoring a system's I/O, you can find the problem areas and prevent bottlenecks, thus ensuring smooth operation. The Performance Monitoring utility of Storage Foundation for Windows (SFW) lets you continuously monitor and tune system performance. You can make adjustments by moving subdisks from an area of high I/O usage to another disk that has lower usage. You also have the feature of splitting subdisks and joining them back together again. This gives you added flexibility of breaking subdisks down to smaller parts and then moving them.
You can view the statistics in a real-time format in the Online Monitoring window. You can also set up the statistics collection so that you can do an analysis of the statistics over time with the historical statistics collection and graphing functions.
The table below summarizes the similarities and differences between the two types of statistics.
Table: Comparison of real-time and historical statistics
Real-time | Historical | |
---|---|---|
Displays in | The Online Monitoring window that shows real-time statistical values in a tabular format for selected storage objects. | A graph that represents historical statistics for one storage object. You can select multiple storage objects to track, but each object is graphed individually. |
Statistical Parameters | You can select one or more of nine statistical parameters to display in the Online Data Display Options window. | All nine statistical parameters are included in the data collection, but you select one parameter at a time for graphing from the graphing window. |
Storage Objects | When you select Online Monitoring, the Select Objects for Online Monitoring window comes up first to let you select the storage objects to monitor. | You select storage objects to monitor in the Start Historical Data Collection window. |
Time Frame | Current values since last refresh. Data is not saved. Online monitoring data is available only when the Online Monitoring window is open. | Data is accumulated over time and saved in a file. You indicate the file size. You can start and stop data collection. You view the data only through a graph. |
For details on these two types of statistics formats, see the following topics: