NSRINDEXASM(8)             Legato NetWorker 4.1.1             NSRINDEXASM(8)


NAME
       nsrindexasm - NetWorker module for saving and recovering indexes

SYNOPSIS
       nsrindexasm [standard-asm-arguments]

DESCRIPTION
       The nsrindexasm is a standard, external ASM (Application Specific
       Module) that assists in the saving and recovery of NetWorker on-line
       save record index files.

       See uasm(8) for a general description of ASM's and the [standard-asm-
       arguments].  It is intended that nsrindexasm be invoked by uasm
       during save(8) or recover(8) operations.

       Actions performed by nsrindexasm, specific to the NetWorker
       application during a save or recover, are:

       Locking:
              To get a consistent copy of the index, this ASM must
              coordinate with the nsrindexd(8) which reads and writes save
              records from and to the index.

       Architecture independence:
              The high speed access methods and data structures implemented
              by the index code can be machine dependent.  This ASM saves
              only the save records (and not access indexes) in an
              architecture independent manner.  Therefore, NetWorker indexes
              may be saved from one machine architecture and recovered to
              another.

       Conservation:
              Since only save records themselves are saved, and internal
              indexes are not saved, considerable network bandwidth and tape
              space are conserved.  Furthermore, the saving of records
              within the database adhere to rules similar to saving of files
              in a filesystem.  Therefore, incremental or differential saves
              of the database consume minimal network bandwidth and tape
              space.

FILES
       /nsr/index/clientname/db
              The file whose data is saved and recovered by this ASM.
       /nsr/index/clientname/db.SCAVENGE
              Synchronization file that this ASM locks before attempting a
              save or recover.
       /nsr/index/clientname/db.RECOVER
              The file where this ASM recovers data.  Upon completion the
              file is renamed to db.
       /nsr/index/clientname/db.RCVDATES
              A temporary file that holds an array of valid save times; this
              file only exists while the index is being recovered.





Licensed material--property of copyright holder(s)                         1





NSRINDEXASM(8)             Legato NetWorker 4.1.1             NSRINDEXASM(8)


SEE ALSO
       nsr_layout(5), nsrindexd(8), recover(8), recoverindex(8), save(8),
       saveindex(8), uasm(8).






















































Licensed material--property of copyright holder(s)                         2