HP-UX 11i: Filesystems and volume managers
Do you think you have to trade-off performance for manageability when using a filesystem?
With HP OnlineJFS/Veritas Filesystem (VxFS) you can have manageability and performance. OnlineJFS/VxFS offers a simple and flexible tool that enables you to manage your environment dynamically. The Concurrent I/O option with OnlineJFS/Veritas Filesystem (VxFS) 5.0.1 is instrumental in bridging the performance gap, making the filesystem an even more appealing solution.
With the 5.0.1 version of OnlineJFS/Veritas Filesystem (VxFS) for HP-UX 11i, HP now supports the use of Concurrent I/O for higher performance. With OnlineJFS you can expand your system and storage, update with new file formats and add new hardware components.Features
Bridges the Gap in Filesystem Performance
- Supports expanding your system and storage, updating to new file formats, and adding new hardware components.
- Grows files systems and shrinks most disk layouts—all while your system remains online.
- Reorganizes and defragments filesystems while they remain online.
- Performs backups from a filesystem snapshot while keeping the original filesystem online.
Do you need to dynamically reduce, expand, or reconfigure your storage to meet changing data, performance, and availability needs?
HP Logical Volume Manager (LVM) Mirrordisk/UX is a subsystem for managing disk space. It offers value-added features that enhance availability and performance, including mirroring (with optional HP MirrorDisk/UX software), high-availability (with optional HP Serviceguard) and striping. With LVM Mirrordisk/UX, a logical volume size can be reduced/expanded to meet changing needs.
Small chunks of unused space from several disks can be combined to create a usable volume. Up to six copies of identical data can be stored and updated at once in a process known as “mirroring” a logical volume. A logical volume can be created so that logically contiguous data blocks are distributed across multiple disks, which speeds I/O throughput for large files when they are read/written sequentially. This feature is called striping and can be used in conjunction with mirroring.Features
Allocate and Manage Disk Space for File Systems or Raw Data
- The HP Logical Volume Manager (LVM) Mirrordisk/UX allows logical volume sizes to be dynamically reduced or expanded to meet changing data needs.
- Small chunks of unused space from several disks can be combined to create a usable volume.
- Up to six copies of identical data can be stored and updated simultaneously using LVM.
- A logical volume can be created so that logically contiguous data blocks are distributed across multiple disks, accelerating I/O throughput for large files that are read and written sequentially. This feature is called striping. Striping can be used in conjunction with mirroring.
Do your HP Integrity systems need to connect to a wide range of storage devices with ever-increasing capabilities?
HP-UX Mass Storage Stack simplifies storage management, increases system performance and provides immense scalability. With the Mass Storage Stack Agile View feature, disk devices and tape drives are identified as actual objects, rather than a hardware path to the object.
Agile View delivers agile addressing (also known as persistent LUN binding), which allows you to create a single Device Special File (DSF) for each unique LUN in the server, no matter how many lunpaths the LUN has or if any of those lunpaths change. If any of the lunpaths change, the DSF bound to the LUN does not change; hence the DSF has agile addressing. This representation increases the reliability and adaptability of the mass storage stack, all without the need for operator intervention.Features
Streamlines and Simplifies Storage Management
- Automatically detects and configures storage devices, logical units (LUNs) and the paths across the storage fabric to each LUN. This provides ease-of-use for mass storage, especially in a dynamic storage environment.
- Includes Agile View, an available agile addressing feature (also known as persistent LUN binding) that allows you to create a single Device Special File (DSF) for each unique LUN in the server.
- Maintains DSF tie to the LUN, no matter how many lunpaths the LUN has or if any lunpaths change. The DSF bound to the LUN does not change; hence the DSF has agile addressing.
- A powerful CLI utility, scsimgr, is provided for management and diagnosis of SAN and devices
- Provides ability for the user to set own user friendly alias for LUNs and target ports through scsimgr commands and this aliases can also be used with I/O commands
- Cluster device special files (cluster DSF) provide a consistent set of device special files across a set of cluster nodes in a Service Guard cluster. The cluster device special files of a LUN will be the same on any node in a specified set of nodes that share the LUN and helps in simplifying the storage management in a Service Guard cluster environment
- Includes support for NPIV feature which provide storage isolation between host and guest in Integrity VM and Vpars environment and it Enables native storage provisioning for guest
- Stack allows for an increased number of LUNs, LUN paths and LUN sizes. Theoretically, up to 16 million LUNs, a total of 4 billion lunpaths can be addressed and the LUN size limit is increased to 8ZB. In addition, a much greater level of parallel processing is provided, allowing systems to handle very large SAN configurations and taking advantage of large multi-processor server configurations.
- The built-in, fully integrated multi-pathing and load balancing subsystem balances I/Os on all available I/O paths to a LUN, providing for better use of I/O channel bandwidth
- Parallelization of scan operations provide a dramatic reduction of I/O scan times, both at boot time and in response to user initiated ioscan
- Target port congestion management feature attempts to manage the number of IO requests going to the storage system optimally by dynamically adjusting the rate at which IO requests are send from the server. This helps in making sure that that resources in the storage system are adequately utilized thereby improving the I/O response time and performance.
- Comes with advanced LUN path monitoring features; it uses SCSI and SAN events to automatically remove failed and add recovered I/O paths used for load balancing of a LUN