The organization of processes started by HiRDB is shown below.

The processes started by a HiRDB parallel server configuration are listed in the following table.

Table B-5 Processes started by a HiRDB parallel server configuration (system server) (1/2)

Process name		Description	Number of processes	Server name	Does process start for each server?
Notation in manual	Process name
					MGR	Non-MGR
Process server process	pdprcd	Manages HiRDB related processes	1	_prc	Y	Y
Post-processing process	pdrsvre	Performs cleanup processing after abnormal termination of a process	If fixed is specified in pd_process_terminator: value of pd_process_terminator_max If resident is specified in pd_process_terminator: from 3 to the number of processes defined by HiRDB If nonresident is specified in pd_process_terminator: from 0 to the number of processes that terminated abnormally	_admrsvr	Y	Y
HiRDB start process for server mode system switchover 1	pdstart2d	Controls start of HiRDB processes linked to cluster software Standby system switchover that does not perform user server hot standby User server hot standby Rapid system switchover Running system of standby-less system switchover (1:1)	1 (none when online)	_pdstrt2	Y	Y
HiRDB start process for server mode system switchover 2	pdstart2a	Controls start of HiRDB processes linked to cluster software Standby system of standby-less system switchover (1:1)	1 (none when online)	_pdst2a1	N	Y
HiRDB start process for server mode system switchover 3	pdsvstartd	Controls start of HiRDB processes linked to cluster software Standby system of standby-less system switchover (effects distributed)	If activeunits is specified in pd_ha_agent, 1; otherwise, 0	_pdsvstd	N	Y
XDS log output process#14	pdprctee	Controls output of XDS log	If the pdxds operand is specified for a BES within a unit, 1; otherwise, 0	--	Y	Y
Command execution process	pdcmdd	Controls execution of update log reflection command	If the pdxds operand is specified for a BES within a unit, 1; otherwise, 0	_cmdd	Y	Y
Cluster synchronization monitoring process	pdxcl	Synchronization monitoring of running XDS and standby XDS	If the pdxds operand is specified for a BES within a unit, 1; otherwise, 0	_xcl	Y	Y
Troubleshooting information acquisition process	pdprfd	Controls the troubleshooting function	1	--	Y	Y
Message log server process	pdmlgd	Controls message output (starts when local is specified for pd_mlg_msg_log_unit)	1	_mlg	Y	Y
System manager (MGR) process	pdrdmd	Controls unit start/stop and manages connected users (This might also be notated as a name server or a node manager.)	1	_rdm	Y	N
Node manager (non-MGR unit) process	pdndmd	Controls unit start/stop and manages connected users (This might also be notated as a name server.)	1	_ndm	N	Y
Status server process	pdstsd	Controls I/O of status files for units	1	_sts0	Y	Y
Scheduler process	pdscdd	Allocates back-end server, dictionary server, and front-end server processes (This might also be notated as a lock server.)	1	_scd	Y	Y
Transaction server process	pdtrnd	Controls transactions	1	_trn	Y	Y
Transaction recovery process	pdtrnrvd	Controls transaction completion/recovery	For an FES: from 1 to the number of crashed pdfes#1 For a DS: from 1 to the number of crashed pddic#1 For a BES: from 1 to the number of crashed pdbes#1	_trnrcv	Y	Y
Audit trail management server process	pdaudd	Manages audit trails	If pd_aud_file_name is specified, 1; otherwise, 0	_aud _auz#2	Y	Y
Audit trail automatic load process	pdaudld	Controls start of pdload for automatic data load	If Y is specified for pd_aud_auto_loading in keeping with the conditions of the audit trail management server process, 1; when N or nothing is specified, 0	_audld	Y	N
Unit monitoring process	pdrdma	Monitors whether the HiRDB unit is running	1 (when the number of units is 1, 0)	_rdmck	Y	N

Table B-6 Processes started by a HiRDB parallel server configuration (system server) (2/2)

Process name		Description	Number of processes	Server name	Does process start for each server?
Notation in manual	Process name
					BES	DS	FES
Log server process	pdlogd	Controls system log acquisition and log-related processes	1	_logN _lozN#2	Y	Y	Y
Deferred write process	pd_buf_dfw	Background write to DB storage disk	1	1dfwN	Y	Y	N
Asynchronous READ process	pd_ios_ard	Asynchronous READ facility	Value of pd_max_ard_process	1ardN	Y	Y	N
Parallel WRITE process for deferred write processing	pd_buf_awt	Facility for parallel writes in deferred write processing	Value of pd_dfw_awt_process	1awtN	Y	Y	N
REDO process	pd_rcv_rd	DB roll forward at full rerun	MIN(number of connected disks, value of pd_max_recover_process) Number of connected disks: Number of character special files that define RDAREAs If the value of pd_rdarea_open_attribute_use is Y, the value of pd_max_recover_process#3	2rrnM	Y	Y	N
Log swap process	pdlogswd	Manages allocation, release and I/O of system log-related files and acquires syncpoint dump	1	_logsN _lozsN#2	Y	Y	Y
Deadlock monitoring process	pdlckmnd	Detects deadlock when lock processing is distributed	For a FES: If 2 or more is specified for pd_fes_lck_pool_partition and if Y is specified for pd_lck_deadlock_check, 1; otherwise, 0 For a DS or BES: If 2 or more is specified for pd_lck_pool_partition and if Y is specified for pd_lck_deadlock_check 1; otherwise, 0	_lckmnN _lckmzN#2	Y	Y	Y

Table B-7 Processes started by a HiRDB parallel server configuration (user server)

Process name		Explanation	Number of processes	Server name	Does process start for each server?
Notation in manual	Process name
					BES	DS	FES
Back-end server process	pdbes	Access to database	MAX (value of pd_max_users, value of pd_max_bes_process)	Server name#4	Y	N	N
Dictionary server process	pddic	Batch management of dictionary table	MAX (value of pd_max_users, value of pd_max_dic_process)	Server name#4	N	Y	N
Front-end server process	pdfes	SQL processing, instructions to back-end server	Value of pd_max_users	Server name#4	N	N	Y

Table B-8 Processes started by a HiRDB parallel server configuration (XDS server)

Process name		Explanation	Number of processes	Server name	Does process start for each server?
Notation in manual	Process name
					BES	DS	FES
XDS process	pdxds	SQL processing, manages memory database	For each pdxds operand specification, 1#12	Server name#13	Y	N	N

Table B-9 Processes started by a HiRDB parallel server configuration (utility server)

Process name		Explanation	Number of processes	Server name	Does process start for each server?
Notation in manual	Process name
					BES	DS	FES
pdinit control process	pdinitd	Initialization utility execution process	1	0minit0	N	Y	N
pdinit execution process	pdinitb	Initialization utility BES-side execution process	1 to 2	0sinit0	Y	N	N
pdcopy backup output process	pdcopyb	Backup file output (starts at the backup output destination specified in pdcopy (-b option))	Degree of duplication number of concurrent pdcopy command executions	0bcpy?0#5	N	N	N
pdcopy database read process	pdcopyr	Database reads	Number of servers subject to copy#6	0rcopyN	Y	Y	N
pdrstr backup read process	pdrstrb	Backup file reads (starts at the backup read destination specified in pdrstr (-b option))	Number of concurrent pdrstr command executions	0brstr0	N	N	N
pdrstr master directory RDAREA read process	pdrstrm	Reads master directory RDAREA#7	Number of concurrent pdrstr command executions	0mrstr0	N	Y	N
pdrstr unload log read process	pdrstrl	Reads unload log file#8	Number of concurrent pdrstr command executions	0lrstr0	N	N	N
pdrstr database write process	pdrstrr	Database writes	Number of servers subject to recovery#9	0brstrN	Y	Y	N
pdrstr master directory RDAREA write process	pdrstrw	Writes to master directory RDAREA#10	1	0wrstr0	N	Y	N
pdload control process	pdloadm	Controls data loads	Number of concurrent pdload command executions	0mload0	Y	Y	Y
pdrorg control process	pdrorgm	Controls database reorganization (unloading, reloading, index reorganization/re-creation, free page release, and making global buffers resident)	Number of concurrent pdrorg, pdreclaim, and pdpgbfon command executions	0mrorg0	Y	Y	Y
pdrbal control process	pdrbalm	Controls rebalancing	Number of concurrent pdrbal command executions	0mrbal0	N	Y	N
pdgetcst control process	pdgcstm	Collects optimization information	Number of concurrent pdgetcst command executions	0mgcst0	N	Y	N
pddbst control process	pddbst1	Controls database condition analysis (starts at MGR unit)	Number of concurrent pddbst command executions	0mdbst0	N	N	N
pdexp control process	pdexpm	Controls dictionary export/import (starts in unit that has export file)	1	0mexp0	N	N	N
pdplgexe control process	pdplgexm	Plug-in utility execution control	Number of concurrent executions of commands provided by plug-ins	0mplge0	N	Y	N
pdorend control process	pdorendm	Online reorganization Reflection control	1	0more0	Y	N	N
pdorend application process	pdorendl	Online reorganization Reflection processing	Degrees of duplication (number of specifications of the pdorend command's -m option)	0lore?0#11	Y	N	N
pdutlcex control process	pdutlexm	Controls utility execution	Number of parallel executions (pd_import_export_parallel operand value of XDS database definition) number of starting and terminating XDSs	0mucex	N	N	N

Legend

Y: Process starts.

N: Process does not start.

--: N/A

Notes

• The xxxN in the server name increases by 1, 2, ..., up to the maximum number of servers in the unit, based on the number of user servers.
• The xxxM in the server name increases by 2 to (maximum number of units 11) based on the definitions.

#1

When two or more pdbes, pdfes, or pddic have crashed, this value increases to the number of crashes. As the crashed pdbes, pdfes, or pddic transactions complete, the number of processes decreases, returning to 1 when there are no more transactions subject to recovery. Note that the upper limit value is the following:

For an FES: (Value of pd_max_users + value of pd_max_reflect_process_count) 2 + 7

For a DS: (value of pd_max_dic_process + value of pd_max_reflect_process_count) 2 + 7

For a BES: (value of pd_max_bes_process + value of pd_max_reflect_process_count) 2 + 7

Note that the maximum value per unit is value of pd_trn_rcvmsg_store_buflen 72. The maximum number of processes per unit will be this value even if the sum of the values obtained for each FES, DS, and BES in the unit is greater than this.

#2

For a standby-less system switchover (1:1) configuration, this is the name used when an alternate BES unit is started.

#3

The REDO process starts when HiRDB starts, and stops when startup is complete.

#4

This is the server name specified by the -s option of the system common definition's pdstart operand.

#5

? is increased 0, 1, ..., f by the backup output process's degree of duplication (the number of specifications of the -b option in the control statement file specified by the pdcopy -f option).

#6

The process starts the same number of processes as there are servers that have RDAREAs subject to copying, as specified in pdcopy (-r, -s, -u, and -a options), as members.

#7

The process starts when the host that has the backup file specified in pdrstr (-b option) differs from the host that has the dictionary server. It also starts when the output destination host of the backup file specified in pdrstr (-b option) differs from the host that has the dictionary server.

#8

When pdrstr has specified an unload log file (-l option) or directory (-d option), the process starts if there are two or more servers to recover, or if the host that stores the unload log file is different from the host that has the server that RDAREAs subject to recovery are members of.

#9

The process starts the same number of processes as there are servers that have RDAREAs subject to recovery, as specified in pdrstr (-r, -s, -u, -c, and -a options), as members.

#10

The process starts if the host that specifies the master directory RDAREA as subject to recovery, and that has the backup file, is different from the host that has the dictionary server.

#11

? is increased 1, 2, ..., 8 by the online reorganization reflection processing's degree of duplication (the number of specifications of the pdorend command's -m option).

#12

If the pdxdsstart command is executed, the process starts; it stops when the pdxdsstop command is executed.

#13

This is the server name specified by the -s option of the system common definition's pdxds operand.

#14

The XDS log output process starts if the pdstart command executes and then becomes resident. It does not stop even if the pdstop command is executed.