Browse Prior Art Database

Centralized and Rapid Backup Restore for Work LAN File Services VM

IP.com Disclosure Number: IPCOM000109348D
Original Publication Date: 1992-Aug-01
Included in the Prior Art Database: 2005-Mar-23
Document File: 4 page(s) / 202K

Publishing Venue

IBM

Related People

Wilton, T: AUTHOR

Abstract

Disclosed is a program that runs within a host-based workstation file server and another machine. Processing is offloaded to the other machine, while the host-based server will act as a client to back up and restore workstation data stored on the host server.

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This is the abbreviated version, containing approximately 34% of the total text.

Centralized and Rapid Backup Restore for Work LAN File Services VM

       Disclosed is a program that runs within a host-based
workstation file server and another machine.  Processing is offloaded
to the other machine, while the host-based server will act as a
client to back up and restore workstation data stored on the host
server.

      WLFS (Work LAN File Services) uses VM DASD to provide file
sharing services to LAN workstation users.  WLFS provides complete
workstation file system services on VM.  It provides DOS, OS/2* and
UNIX** file format and operations, including support for long names,
multilevel directories, file and directory attributes and byte-level
locking.  In an OS/2 environment, services are provided through an
OS/2 LAN 2.0 system.  In a TCP/IP environment WLFS provides standard
NFS version 2 services.

      WLFS allows file sharing across multiple LANs and multiple
environments.  OS/2 LAN server users can concurrently share data with
NFS users.  Users across multiple OS/2 LANs can concurrently share
data with each other.  Files on CMS format minidisks can be shared by
LAN users and CMS users.

      WLFS provides its services transparently.  The workstation
user's environment is unchanged.  No new code is required on any end
user workstation.  WLFS transforms the data as needed when CMS files
are accessed by workstation users and when workstation format files
are imported from or exported to CMS.

      WLFS supports channel connectivity to OS/2 LAN server for high
performance.  WLFS can store files larger than those stored by
LAN-based servers.  Administration is done at the VM system.
Administrators perform basic tasks while WLFS is running.  They can:
control and monitor access to the files stored under WLFS
import/export files between the workstation file system on VM and CMS
mini-disks and back up and restore WLFS workstation and CMS files to
the IBM Workstation Data Save Facility/VM (WDSF/VM).

      WLFS consists of code running in three places - in server and
administration virtual machines on the VM system and in the OS/2 LAN
Server that unites the VM system to the LAN.  There is no WLFS code
on the user's workstation.  From a workstation user's view, WLFS is
first an extension of the storage capacity on the OS/2 LAN Server.
Secondly, WLFS allows a workstation user to directly access CMS files
on the VM system.  Workstation users can now share CMS format files
with CMS users, subject to existing CMS minidisk sharing
restrictions.  Workstation users will continue to do their tasks at
their workstations using the LAN Requester methods of operation that
they already know.  This is a significant advantage.  Workstation
users are not asked to become CMS users.  Access to files stored on
VM DASD is transparent to the workstation users and programs.  Any
workstation program that works with data stored on the OS/2 LAN
Server today can also work unchanged when that data is...