This section lists the features and capabilities of OES Storage Services on Open Enterprise Server (OES) servers.
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Feature Description |
NSS for OES 2023 |
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Management interfaces |
iManager |
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NLVM. For more information, see OES 2023: NLVM Reference. |
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Utilities in the terminal console (NSSMU, RIGHTS, NSSCON, ATTRIB, RAVSUI, RAVVIEW, nssquota, ncsinit, nbackup(1)) |
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NSS commands in the NSS Console (NSSCON) |
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OES Remote Manager for Linux (for Dynamic Storage Technology shadow volumes and for managing NCP Server connections to NSS volumes) |
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File system trustees, trustee rights, and inherited rights filter to control access to directories and files |
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Client for Open Enterprise Server |
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RIGHTS utility for Linux |
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File system directory and file attributes to control functions available for directories and files |
Files and Folders plug-in to iManager Client for Open Enterprise Server |
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Directory quotas management (requires the Directory Quotas attribute for the volume) |
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User space quota management (requires the User Space Quotas attribute for the volume) |
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Default mount location for NSS pools |
/opt/novell/nss/mnt/.pools/poolname |
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Default mount location for NSS volumes |
/media/nss/volumename |
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File system type (as recognized and reported by the operating system) |
nssvol |
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File access protocols |
NCP OES CIFS for Linux Linux NFS (version 3) Linux NFS requires users to be Linux-enabled with Linux User Management. The service must also be enabled. |
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Interface |
64-bit |
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Character format |
Unicode |
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Maximum device size recognized (physical or logical) |
2E64 512-byte sectors |
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Maximum software RAID device size |
8 TB (GPT) for NSS32 Pools 8 EB (GPT) for NSS64 Pools 2 TB (DOS) for NSS32 and NSS64 Pools NOTE:The pools are currently limited to 8 TB for NSS32 and 8 EB for NSS64, RAID1 sizes for pool objects are also limited to 8 TB or 8 EB depending on the pool type. |
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Minimum software RAID segment size |
12 MB per segment |
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Maximum partition size |
8 TB for NSS32 and 8 EB for NSS64 pools Valid Range: 12 MB to 8 TB for NSS32 pools, and 12 MB to 8 EB for NSS64 pools NOTE:The Maximum segment size corresponds only to GPT partition. If all devices are partitioned using DOS, the size limits to 2TB. |
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Maximum number of partitions per pool |
No practical limit |
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Maximum pool size |
8 TB for NSS32 pools 8 EB for NSS64 pools |
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Minimum pool size |
12 MB |
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Maximum size of a volume |
Up to 8 TB for NSS32, depending on the pool size and available space in the pool. Up to 8 EB for NSS64, depending on the pool size and available space in the pool. |
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Maximum file size |
Up to 8 TB for NSS32, depending on the volume size and available space in the volume. Up to 8 EB for NSS64, depending on the volume size and available space in the volume. |
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Maximum number of files per volume |
Up to 8 trillion, regardless of how many name spaces are loaded. NOTE:NSS can support this. You are limited by the browser and application ability, of course. |
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Maximum number of files open concurrently |
No practical limit on the number of files open concurrently. If any number is limited, it might be because of the system, file access protocols or any similar configuration. Other factors such as system resources can also influence this number. |
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Maximum number of volumes per server |
No practical limit on the number of NSS data volumes. |
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Time to mount a volume |
Requires only a few seconds, thanks to journaling. |
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Volume name space |
Accommodates all name spaces (DOS, Macintosh, Long, and UNIX). Long is the default name space. The Lookup Name Space attribute allows you to set the default name space used when mounting volumes. Directory names and filenames are case insensitive with the Long name space. |
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Minimum server memory required to activate a volume |
Requires only 4 MB available RAM to activate a single volume of any size and any number of files. Loads a file’s metadata into memory only as you access the file. |
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File access time |
Same for each file, regardless of its location on the volume. |
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Error correction and data recovery time on system failure |
Journaling file system logs changes. On system failure, replays the most recent transactions to confirm validity, then repairs errors or rolls back to the original condition, typically in 15 to 60 seconds, unless the volume is corrupted. |
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Repair of corrupted pools and volume |
Ongoing journaling of the file system; if the pool metadata structure is corrupted, use the RAVSUI utility to verify and rebuild the volume. |
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Time to repair corrupted volume |
From a few seconds to several hours, depending on the volume size. |
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Multiple connection paths to storage media |
Use a native Linux multiple path I/O solution. |
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Software RAID support |
RAID 0 (striping) RAID 1 (mirroring) RAID 5 (striping with parity) RAID 0+1 (mirroring RAID 0 devices) RAID 5+1 (mirroring RAID 5 devices) |
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Volume encryption |
Yes You must mount encrypted volumes only from NSSMU on the first mount after a system reboot so that you can enter the password. The NSSCON utility does not support entering a password from the command line. |
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Data shredding |
Yes, up to 7 times |
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File compression |
Yes |
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Data migration |
Yes |
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Directory quotas |
Yes |
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User space quotas (user space restrictions) |
Yes |
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Salvage or purge deleted files, directories, or volumes |
Yes |
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Transaction Tracking System (TTS) |
Not supported. If you need content tracking and trustee support, use NCP volumes on Linux reiser, XFS, or ext3 file systems, then set the file system’s journaling mode to the Journaling option. |
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Read ahead blocks |
Yes |
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File save time |
Provides the group write options and timers. For information, see Section 28.3, Configuring or Tuning Group I/O. |
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File-level snapshot (make a temporary snapshot copy of an open file for backup) |
No |
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Modified File List |
Yes |
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Pool snapshot (retain point-in-time version of a pool using block-level copy on write) |
Yes The stored-on pool must be on a separate partition. Pool snapshots are not supported for clustered NSS pools on Linux. |
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Backup systems support |
OES 2023: Storage Management Services Administration Guide for Linux For an overview of backup resources on Linux, see Section 27.0, Managing Backup and Restore for Data and Trustee Information. |
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Distributed File Services for moving and splitting NSS volumes |
Yes |
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OES Archive and Version Services |
Yes |
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Device maintenance support |
Activate and deactivate devices by pool. |
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CD and DVD device recognition |
No; use Linux POSIX file system options instead. |
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CD and DVD image files |
No; use Linux POSIX file system options instead. |
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Ability to access DOS partitions on the NetWare server |
No; use Native Linux file system options instead. |
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Operating system version detection |
Default process |
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Cache balancing for NSS cache buffers |
Yes; for information, see Tuning NSS Performance. |
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Tuning I/O write behavior |
Set group I/O write parameters for NSS on Linux. For information, see Configuring or Tuning Group I/O. |
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Dynamic Storage Technology (DST) For information about NSS volume attributes and features that are supported in DST shadow volumes, see |
DST supports NSS volumes on OES 2015 or later servers as the primary or secondary volume in the shadow volume. For information, see the OES 2023: Dynamic Storage Technology Administration Guide. |