BMC AMI Copy COPY and MODIFY processing phases

For the COPY and COPY IMAGECOPY commands, NGT Copy processing consists of three phases. The following figure shows these phases occuring when making image copies. The RECALL command, which applies only to table spaces , requires only one phase, RCLL, which is not used by the other commands. The QUIESCE command, which establishes a quiesce point, requires a QUIESCE phase, which is not used by the other commands.

The functions performed by NGT Copy during each phase are listed in the six tables at the bottom of this page.

The following figure shows NGT Copy MODIFY processing consists of the phases. The functions performed by the MODIFY command during each phase are listed in the six tables at the bottom of this page:

UTILINIT—Processing phase used by NGT Copy¹

Command		Description
COPY command	All SHRLEVEL values	Initializes the job and any interaction with XBM Parses command Performs catalog lookup Manages concurrent utility access Modifies space status as required
COPY command	Additional actions for SHRLEVEL CONCURRENT²	If Instant Snapshots are not specified (DSSNAP NO): Initializes the process with SUF or XBM Initializes the space group If Instant Snapshots are specified (DSSNAP YES): Creates Instant Snapshots for table spaces and index spaces
COPY IMAGECOPY command		Initializes the job Parses command Performs catalog lookup Manages concurrent utility access Does not modify space status
RECALL command		Not applicable
QUIESCE command		Initializes the job Parses command Performs catalog lookup Manages concurrent utility access Does not modify space status
MODIFY command		Initializes the job Parses commands Performs catalog lookup Manages concurrent utility access

^{1 All phases use the SYSPRINT data set and update the BMCUTIL and BMCSYNC tables. For more information about the BMCUTIL and BMCSYNC tables, see Common-utility-tables.}

^{2 This is applicable only when making Snapshot Copies.}

COPY—Processing phase used by NGT Copy¹

Command		Description
COPY command	All SHRLEVEL values	If Instant Snapshots are not specified (DSSNAP NO): Copies pages from the table space to the output data sets Performs page integrity checks Copies index data sets Gathers statistics if RUNSTATS is specified For SHRLEVEL REFERENCE and SHRLEVEL CHANGE, if Instant Snapshots are specified (DSSNAP YES): Creates Instant Snapshots for table spaces and index spaces
COPY command	Additional actions for SHRLEVEL CONCURRENT²	Performs initialization checks Copies pages from SUF or XBM to output data sets when appropriate
COPY IMAGECOPY command		Copies the image copy to the output data sets performs page integrity checks for table spaces
RECALL command		Not applicable
QUIESCE command		Not applicable
MODIFY command		Same as COPY Command if TEMPLATE command is used to create copies

^{1 All phases use the SYSPRINT data set and update the BMCUTIL and BMCSYNC tables. For more information about the BMCUTIL and BMCSYNC tables, see Common-utility-tables.}

^{2 This is applicable only when making Snapshot Copies.}

UTILTERM—Processing phase used by NGT Copy¹

Command		Description
COPY command	All SHRLEVEL values	Updates catalog as required Cleans up after the COPY phase Manages concurrent utility access Ends connection to XBM Modifies space status as required
COPY command	Additional actions for SHRLEVEL CONCURRENT²	Ends connection to SUF or XBM
COPY IMAGECOPY command		Updates catalog as required Cleans up after the COPY phase Manages concurrent utility access Does not modify space status
RECALL command		Not applicable
QUIESCE command		Manages concurrent utility access Does not modify space status
MODIFY command		Cleans up after the MODIFY phase Manages concurrent utility access

^{1 All phases use the SYSPRINT data set and update the BMCUTIL and BMCSYNC tables. For more information about the BMCUTIL and BMCSYNC tables, see Common-utility-tables.}

^{2 This is applicable only when making Snapshot Copies.}

RCLL—Processing phase used by NGT Copy¹

Command		Description
COPY command	All SHRLEVEL values	Not applicable
COPY command	Additional actions for SHRLEVEL CONCURRENT²	Not applicable
COPY IMAGECOPY command		Not applicable
RECALL command		Initializes the job Parses command Performs catalog lookup Updates catalog as required Manages concurrent utility access Performs cleanup
QUIESCE command		Not applicable
MODIFY command		Not applicable

^{1 All phases use the SYSPRINT data set and update the BMCUTIL and BMCSYNC tables. For more information about the BMCUTIL and BMCSYNC tables, see Common-utility-tables.}

^{2 This is applicable only when making Snapshot Copies.}

QUIESCE—Processing phase used by NGT Copy¹

Command		Description
COPY command	All SHRLEVEL values	Not applicable
COPY command	Additional actions for SHRLEVEL CONCURRENT²	Not applicable
COPY IMAGECOPY command		Not applicable
RECALL command		Not applicable
QUIESCE command		Performs quiesce
MODIFY command		Not applicable

^{1 All phases use the SYSPRINT data set and update the BMCUTIL and BMCSYNC tables. For more information about the BMCUTIL and BMCSYNC tables, see Common-utility-tables.}

^{2 This is applicable only when making Snapshot Copies.}

MODIFY—Processing phase used by NGT Copy¹

Command		Description
COPY command	All SHRLEVEL values	Not applicable
COPY command	Additional actions for SHRLEVEL CONCURRENT²	Not applicable
COPY IMAGECOPY command		Not applicable
RECALL command		Not applicable
QUIESCE command		Not applicable
MODIFY command		Performs SYSCOPY maintenance Performs BMCXCOPY maintenance Performs SYSLGRNX maintenance Performs ICF catalog maintenance Modifies space status as required

^{1 All phases use the SYSPRINT data set and update the BMCUTIL and BMCSYNC tables. For more information about the BMCUTIL and BMCSYNC tables, see Common-utility-tables.}

^{2 This is applicable only when making Snapshot Copies.}

Related topic

How-BMC-AMI-Copy-works

Tags: getting_started

Last modified by anevans on 2022/11/01 07:35

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