NSRINDEXASM(8)              Legato NetWorker 3.0              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 dur­
       ing save(8) or recover(8) operations.

       Actions performed by nsrindexasm, specific to the NetWorker applica­
       tion during a save , are:

       Locking:
              To get a consistent copy of the index, this ASM must coordi­
              nate 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 architec­
              ture 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.

       The recover operation of this ASM is similar to the save aspect.

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 3.0              NSRINDEXASM(8)


SEE ALSO
       nsrlayout(5), nsrindexd(8), nullasm(8), recoverindex(8), savein­
       dex(8), uasm(8).






















































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