       %                               DIGITAL    Software Product  Description   C ___________________________________________________________________   C PRODUCT NAME:  Spiralog File System for OpenVMS Alpha  SPD 60.48.02                 Version 1.2   DESCRIPTION   D The Spiralog File System for OpenVMS[TM] Alpha is an optional compo-+ nent of the OpenVMS Alpha operating system.   F Spiralog is an enhanced 64-bit file system that coexists with Files-11F (ODS-2), the original OpenVMS Alpha file system. Spiralog and Files-11D can run simultaneously on the same computer. You can use Spiralog in/ an OpenVMS Cluster or on a standalone computer.    Spiralog provides:   o  Online backup and restore  D Spiralog provides fast online backup that runs without requiring anyF interruption to applications or users. This reduces the amount of time required to manage your system.   G You can save either a whole volume or the parts that have changed since H a previous save. You can restore either a whole volume or selected files and directories.   o  Scalability  D Spiralog keeps up with growing data requirements and makes data man-D agement much simpler. It supports 10's of millions of files per vol-C ume by allowing huge directories. It also provides support for huge C files, an order of magnitude larger than those supported by today's 
 file systems.   F o  A high-performance write-behind software cache on each computer us-    ing Spiralog   C                                                       February 1997        F The caches are automatically kept coherent throughout an OpenVMS Clus-E ter. Additionally, Spiralog provides cache ordering guarantees to en- 1 sure immediate recovery after a computer failure.   + o  Compatibility with existing applications   F Spiralog supports existing OpenVMS programming interfaces for file ac-H cess, such as Record Management Service (RMS) and run time library (RTL)C functions. There is no need to recompile or relink existing OpenVMS 
 applications.   D o  A Spiralog utility that allows system managers to set up and man-    age Spiralog volumes    RESTRICTIONS  : Spiralog is supported only under the following conditions:  F o  Spiralog must be used with disks that can be considered error-free.H    This restriction protects against the failure of a block on the phys-D    ical disk media. Spiralog requires that the underlying disks must+    be configured with one of the following:   6    -  Volume Shadowing for OpenVMS V7.1 (SPD 47.04.xx)  @    -  StorageWorks RAID Software for OpenVMS V2.4 (SPD 46.49.xx)  C    -  StorageWorks HSX controllers with Disk Mirroring (RAID 1) en-        abled   D    -  Any other disk that provides redundancy to protect against me-6       dia errors, such as RAID 5 arrays or shadow sets  D o  Spiralog volumes must run at no more than 80% full. A full Spira-G    log disk becomes a read-only volume, where you cannot delete a file. C    Recovery may involve a full BACKUP, reinitialization of the vol- D    ume, and a selective restore to reduce the amount of data on your
    volume.  G o  Serving Spiralog volumes via MSCP to other nodes in an OpenVMS Clus- $    ter environment is not supported.  "                                  2       E o  Spiralog volumes are created with write-behind caching enabled. In D    the event of a system failure you may loose data that was writtenF    into the write-behind cache. To eliminate this risk you can use theC    write-through caching option as described in the Spiralog System -    Manager's Guide and Spiralog User's Guide.   C o  Access to Spiralog volumes from computers running either OpenVMS D    VAX or versions of OpenVMS Alpha prior to Version 7.0 is provided7    only via network software such as DECnet and DECdfs.   H o  Files-11 BACKUP is supported only for migrating data between Files-11G    and Spiralog volumes. To back up and restore the data stored in Spi- E    ralog volumes use the SPIRALOG SAVE and SPIRALOG RESTORE commands.    UNSUPPORTED FEATURES  D Spiralog does not support the features shown in the following table.E If you want to use these features, you must use Files-11 (ODS-2). For D example, you must use Files-11 for your system disk and for disks on% which you want to enable disk quotas.   C ___________________________________________________________________  Unsupported C Features________Comments___________________________________________   B System disks    You cannot use a disk initialized with Spiralog as                 a system disk.  B Quorum disks    You cannot use a disk initialized with Spiralog as/                 an OpenVMS Cluster quorum disk.   6 Volume sets     Spiralog does not support volume sets.  4 RAM disks       Spiralog does not support RAM disks.  @ Disk quotas     Disk quotas are permanently disabled on Spiralog                 volumes.  C Page and swap   If you put page or swap files on a Spiralog volume, C files           your system may hang if it becomes short of memory.   "                                  3         C Unsupported________________________________________________________ C Features________Comments___________________________________________   @ Aliases for     Spiralog supports aliases for files, but not for directories     directories.  ? Erase on        When you delete a file or directory in a Spira- @ delete          log volume, the disk blocks that it used are not"                 physically erased.  C Movefile        Attempts to use the Movefile feature fail on Spira-                  log volumes.  B Version         All files and directories in Spiralog volumes have8 limits          a version limit of 0 (no version limit).  B Expiration      All files and directories in Spiralog volumes haveC dates___________no_expiration_date.________________________________    HARDWARE REQUIREMENTS   E o  Each computer on which you install Spiralog or mount Spiralog vol- /    umes must have at least 64 Mbytes of memory.   A o  A Spiralog volume must have a capacity of at least 500 Mbytes.   4 o  Files-11 (ODS-2) must be used as the system disk.   Processors Supported  D Spiralog is supported on all OpenVMS Alpha systems, as documented inC the OpenVMS Operating System for VAX and Alpha Version 7.1 SPD (SPD 
 25.01.xx).            "                                  4        DISK SPACE REQUIREMENTS   E o  Free disk space required for installation: 9200 blocks on the sys-     tem disk   D This size is approximate; the actual size may vary depending on your8 system environment, configuration, and software options.   SOFTWARE REQUIREMENTS   . o  OpenVMS Alpha Operating System Version 7.1.   GROWTH CONSIDERATIONS   E The minimum hardware and software requirements for any future version G of Spiralog may be different from the requirements for the current ver-  sion.    ORDERING INFORMATION  , Spiralog Version 1.2 is available on CD-ROM:  1 o  Software and online documentation: QA-4P7AA-H8   % o  Printed documentation: QA-4P7AA-GZ    SOFTWARE LICENSING  E The license rights for Spiralog are included with the license for the  OpenVMS Alpha operating system.  SOFTWARE PRODUCT SERVICES   D Software Product Services for the Spiralog component are included inC the OpenVMS Alpha operating system Software Product Services. A va- E riety of integrated and  la carte hardware and software product ser- C vices are available. For additional information, contact your local ) Digital office or Digital representative.       "                                  5        SOFTWARE WARRANTY   G Warranty for this software product is provided by Digital with the pur- D chase of a license for the OpenVMS Alpha operating system product asG defined in the Software Warranty Addendum of the OpenVMS Operating Sys- E tem for VAX and Alpha Version 7.1 SPD. The above information is valid D at time of release. Please contact your local Digital office for theF most up-to-date information.  1997 Digital Equipment Corporation. All rights reserved.  C [TM]Digital, OpenVMS and the Digital logo are trademarks of Digital      Equipment Corporation.                                                        "                                  6