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Virtual Software Systems, Inc. ShadowDisk/Z ShadowDisk/Z Product Summary 1 Customer Benefits System Requirements 2 Installation 3 4 Product Configuration and Specs 5 Commands 6 Product Licensing 7 About us ShadowDisk/Z


  1. Virtual Software Systems, Inc. ShadowDisk/Z

  2. ShadowDisk/Z Product Summary 1 Customer Benefits ✓ System Requirements 2 Installation 3 4 Product Configuration and Specs 5 Commands 6 Product Licensing 7 About us

  3. ShadowDisk/Z ShadowDisk/Z is a software implementation to z/VM which allows multiple Linux virtual machines to transparently share part or all of a virtual Linux file system, without altering the base FS. 2 3 1 Supports: Implements . multi-level database Is transparent (concatenated) technology to guest virtual which intercepts SDISK machines FS read and databases write commands. . Booting SDISK Read requests databases are satisfied without an from the DB or underlying base the base FS; FS (NOBASE Writes are sent option). to the DB only.

  4. ShadowDisk/Z Product Summary Customer Benefits • Significantly reduces test/developer disk requirements for multiple-user Linux application testing • Significantly lessens FS backup/restore requirements, since the DB contains only active FS blocks. • Databases can be shared among multiple users. • Utilities provided to query, backup, and restore ShadowDisk/Z databases. • Provides for the creation of databases which do not require a base FS (NOBASE option).

  5. ShadowDisk/Z Product Summary System Requirements text • Z/VM 6.4 or higher System • 200 3390 Cyls or equivalent for Install disk ShadowDisk/Z • 10 3390 Cyls or equivalent VSSI CP PARM disk • Sufficient disk storage to hold user Requirements ShadowDisk/Z databases (ECKD or FBA)

  6. ���������������������������� I/O Processing Flow Linux + apps Block Reads Block Writes z/VM ShadowDisk/Z Database Linux Base File System NOTE: Base Linux file system is never modified!

  7. ShadowDisk/Z Product Summary Installation Download packages and license from the VSSI Reboot and test! FTP site Add disk owner and MDISK definitions to site Build CP NUC and PARM disk files via VSSI z/VM directory execs Install via the VSPKG exec, which prompts the Determine current/projected SES PPF user for installation parameters, then invokes the environment build execs

  8. ShadowDisk/Z Product Summary ������������������������������ • 1. User invokes VSPKG exec. 2. VSPKG prompts user for site parameters.

  9. ShadowDisk/Z Product Summary ������������������������������ • 3. After all prompts satisfied, 4. Installation begins…

  10. ShadowDisk/Z Product Summary ������������������������������ • 5. … until all assemblies completed. 6. User invokes VSBLDNUC to build CP NUC with VSSI modifications. 7. VSCOPY command (not shown) builds VSSI TXTLIB and configuration files, then copies objects to appropriate CP PARM disks.

  11. ShadowDisk/Z Product Summary Product Configuration and Specifications Product Configuration Product Configuration Specs 2 • Each SDISK database is open in WRITE mode to 1 • Build SDISK Configuration the specified user instance Files • Users can configure multiple concatenated SDISK • Format SDISK database databases to be accessed at SDOPEN time MDISKs (primary DB is R/W; secondary DBs are R/O) • Issue SDINIT command to • Database usage permissions (R/W, R/O, etc) can initialize configuration be assigned to the user population by user name prefix or CP directory class (default permissions • User issues SDOPEN to apply to all unless overridden via prefix or class) connect to the specified DB • Run/test configuration

  12. ShadowDisk/Z Product Summary ��� ������������������� • ������� ������������ ����� �������� ���!�"#$� ��#()*+,%�-�.���.�/���*%-�/ �0����������������������������0����1�.���.�/� �#%&�'"� �.���.�/�2�/�2�/&2����3�������������������4���� ����� ���������0��������4����*%-�/� ��*+,%�-�4����3 ��*%-�/� 5&�#.���6)$��%/77 �0����������������������������������4���� ��*+,%�- �����������������������9�$���6�2�������� ���� .�$�)$&8��9 :���������������%/773�&�4����'���1������������� 5&�#)�!�"#$�!#� �1����2�������������������',8�����#.�4����3 �#.)"&5'#�',8� ',8�� �#."5'��77;�7%�',877� �0����������4����'���1�����������������9�$���6�� ���#. ���:������������������77�������7%���������(�+�4�� ����������2�������������������������������4��� ������4�� ���������� �������3 $����0����#."5'����������������4���0�������3 ',877�� �4������ 5����� ������������� ���������4������ ��%$" .�5'�%$"���������� ����������4�����������3�

  13. ShadowDisk/Z Product Summary ��� ������������������� • 1. Logon as VSSIVP51 2. The DBTEST exec (in-house): . Links Linux base system disks as virtual addresses 100-10F (R/O) . Links SDISK database disks as virtual addresses F500-F503 (R/W) 3. User boots Linux (vdev 100)

  14. ShadowDisk/Z Product Summary Sample Initialization Commands • SDINIT Initializes SDISK environment at boot time • SDOPEN Opens a SDISK database for processing • SDCLOSE Closes (releases) a SDISK database • SDADD Adds minidisks to a SDISK database

  15. ShadowDisk/Z Product Summary Sample User Commands • SDIPL Boots a SDISK DB previously prepared for NOBASE operation • SDLINK Links a SDISK DB from a dynamic MDISK pool • SDQUERY Displays DB and base FS statistics • SDSET Sets/modifies database configuration parameters at run time

  16. ShadowDisk/Z Product Summary Sample Initialization Commands • SDBKUP Backup a SDISK DB to tape media (physical backup) • SDREST Restore a SDISK DB from tape media (physical restore) • SDUNLOAD Backup a SDISK DB to tape media (logical backup) • SDLOAD Restore a SDISK DB from tape media (logical restore) • SDUTIL Copy/move/print/delete database records

  17. ShadowDisk/Z Product Summary About us • Established in 1982 • Located in Gainesville GA (USA) • Customer base is typically Fortune 100 • Established solid reputation for product support • Support cost included in yearly license cost • Support requests handled via toll –free (855-411-VSSI), local number (770-781- 3200), and email (support@vsoftsys.com)

  18. Virtual Software Systems, Inc. ShadowDisk/Z

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