View
237
Download
0
Category
Tags:
Preview:
Citation preview
Phooey on GUI!Using HPL from the command line
Jerry HamiltonJerry HamiltonDirector of Database Director of Database
AdministrationAdministration
Fleishman-Hillard, IncFleishman-Hillard, Inc
Informix User Forum 2005 Moving Forward With Informix
Atlanta, Georgia December 8-9, 2005
December 8,9 2005 2
Using HPL from the command line
•General introductions
•All about the tool
•Speed and flexibility
•The Onpload database
•The Onpload utility
•Simple Script and the Onpload utility
•Management of HPL jobs
•Logs, messages and helpful how-to’s
December 8,9 2005 3
•I’ve been using Informix products since 1992
•Active member in the SLAIUG
•Former IIUG Board member
•Former President of the IIUG
•Avid HPL user
•Old, grey hair, guy who lives on the “command line”
General Introductions
December 8,9 2005 4
Old guy
December 8,9 2005 5
•Overview
•Architecture
•Components
All about the tool
December 8,9 2005 6
Overview
• Supports COBOL, ASCII, multibyte, delimited or binary data
• IPLOAD provides a generate option• Can unload/load data from different locales• Support for unloading data with a query using a Select
statement• Supports loading raw tables in express mode
December 8,9 2005 7
Architecture
• Load straight from or to disk• Prepare data to a pipe and Load• Unload/Load to gzip• Unload to another HPL load process
December 8,9 2005 8
Server
Onpload Target
Onpload Utility
IPLOAD
File Pipe
December 8,9 2005 9
Components
• HPL consists of the onpload utility, ipload and the onpload database– Onpload
• Converts, filters and moves data between a database and a storage device• Uses information from the onpload database to run load and unload jobs• Flags information about data during a load• Onpload can be used from the command line or from ipload
– Ipload• Creates and manages the onpload database• Creates and stores information into the database• Vehicle used to manage the onpload components
– Onpload database• Holds information about load and unload jobs
December 8,9 2005 10
•What other data mover tools are available
•Dbload, “unload to”, dbexport
•General HPL uses
•Backup tool, Reorg tool, data movement tool
•Just how fast is it?
•Table – PS_FH_MISC_TRANS
•Size: 463 bytes
•Columns: 27
•Rows: 2,595,394
•10mins 32sec to “unload to..”
•4mins 31secs to HPL!
Speed and Flexibility
December 8,9 2005 11
Speed and Flexibility – cont.
• Other really fast examples– Baseline speed of HPL is 2GB/CPU/HR– Some users have seen 5 – 10GB!– How big are the rows– What kind of machine– Using Light Scans
December 8,9 2005 12
• Starting HPL and what occurs under the covers
• Environment variables
• “normal” Informix – INFORMIXDIR, etc
• $DISPLAY
• At the command prompt enter, “ipload”
• Phooey on GUI!
• Your desktop can get busy!
• Just watch….
The Onpload Database
December 8,9 2005 13
IPload
December 8,9 2005 14
Unload Job
December 8,9 2005 15
Load Job
December 8,9 2005 16
Busy Desktop
December 8,9 2005 17
Busy Desktop
December 8,9 2005 18
Busy Desktop
December 8,9 2005 19
Busy Desktop
December 8,9 2005 20
Busy Desktop
December 8,9 2005 21
The Onpload database
• The major tables of onpload database– Session - Holds the parameters that onpload uses to invoke a job
– Device - Holds information about the device array
– Formats - Holds basic information for a record format
– Formatitem – Defines the data/file records
– Maps – Defines record-to-table mapping
– Mapitem – Defines the relationship between columns and records
– Others
December 8,9 2005 22
•Clicky-clinky-Clack! No more!
•Command line switches
•Some quick examples
The Onpload utility
December 8,9 2005 23
Usage: clhpl.sh {-fu | -fl} -j jobname -D dbname -t tablename {-d file | -f filename} [-l logfile] [-R rejectfile] [-e maxerrors] [-debug]
-fu Create an unload job -fl Create a load job -j jobname Name of the job to create -D dbname Database name -t tablename Table to load/unload -d file File to use for load/unload -f filename A file containing a list of files to use for the load/unload. The format is one file per line -l logfile Pload log file -R rejectfile Pload reject file -e maxerrors Maximum errors before pload stops -debug Enable script debugging output
Create a pload load/unload job by populating the onpload database.
Simple Script
December 8,9 2005 24
Simple Script Simple shell script to populate the onpload database and create load/unload jobs without using the ipload gui. Quite a few assumptions are made:
1. All loading is done from ASCII files.
2. Files have the usual pipe delimited format.
3. All columns in the table are used and the file format matches the order of the columns in the table. (No mapping)
4. The map, format, and device names are all the same as the job name.
5. No attempt is made to share the device array between a load and unload job for the same table.
6. While some error checking is performed, none is attempted for the inserts into the onpload database.
December 8,9 2005 25
Simple Script
• CLHPL.sh does:– Inserts data into device table
– Inserts data into formatitem table
– Inserts data into formats table
– Inserts data into mapitem table
– Inserts data into maps table
– Inserts data into query table
– Inserts data into session table
• Basically everything you need to run an HPL job
December 8,9 2005 26
Populate Onpload database
• ###############################################################• # populate_hpldb• # Create all unload jobs in onpload database• #• ###############################################################• populate_hpldb()• {• while read tablename num_of_files• do• jobname=$tablename• unloadfilenames=$IPLOADDIR/ipload_filelists/$tablename• logfile=$IPLOADDIR/logs/$tablename.log• rlogfile=$IPLOADDIR/rlogs/$tablename.rlog
• ./clhpl.sh -fu -j $jobname -D $DATABASE -t $tablename -f $unloadfilenames -l $logfile -R rlogfile -e 0
• done < $IPLOADDIR/$INPUTFILE• }
December 8,9 2005 27
Run the jobs!
• ###############################################################• # run_unloads• # Run all unload jobs in batches based on $NUMTREADS• #• ###############################################################• run_unloads()• {• integer jobcount=0• while read jobname num_of_files• do• jobcount=`jobs|wc -l`• while [[ $jobcount -ge $NUMTREADS ]]• do• sleep 1• jobcount=`jobs|wc -l`• done• echo "starting unload job for $jobname"• onpload -j $jobname -fu > /tmp/onpunloads.out 2>&1 &• done < $IPLOADDIR/$INPUTFILE• echo "waiting for all current running unloads to complete"• wait• }
December 8,9 2005 28
•Modes of operation
•Violations
•Performance considerations
Management of HPL jobs
December 8,9 2005 29
Modes of operation
• Deluxe Mode– Referential and constraint checking– Load while users are working– Users can access during a load– Updates indexes– Evaluates triggers
• Limitations:– No loads without conversion
December 8,9 2005 30
Modes of operation
• Express Mode– Locks tables for exclusive mode during loads– Disables referential and constraint checking– Requires a level-0 backup after load ==– Supports loading of raw tables– Reenables all objects after loading
• Limitations (a lot):– Logging mode or ANSI mode– Tables that contain smart large objects– Tables that contain simple large objects– Rows larger than the system page size– more
December 8,9 2005 31
Violations
• Records that don’t meet the load criteria– Null values where tables specifies NOT NULL– Char’s in numeric fields– Records that do not match number of columns
• Rejected record from the input file – Filter rejects– Records that can’t be converted
• Constraint violations
December 8,9 2005 32
Performance considerations
• Configuration-parameter values• Mode• Devices• Usage models
December 8,9 2005 33
Logs, messages and How-to’s
• Mon Dec 5 13:39:09 2005• SHMBASE 0x76a4c000• CLIENTNUM 0x49010000• Session ID 2• Unload Database -> fsqa8• Query Name -> misc_trans• Device Array -> misc_trans• Query Mapping -> misc_trans• Query -> select * from psoft8.ps_fh_misc_trans for read only• Convert Reject -> /tmp/misc_trans.rej• 13:39:11 Records Processed -> 10000• 13:39:12 Records Processed -> 20000• 13:39:13 Records Processed -> 30000• 13:39:14 Records Processed -> 40000
• …many more lines
• 13:44:00 Records Processed -> 2560000• 13:44:01 Records Processed -> 2570000• 13:44:02 Records Processed -> 2580000• 13:44:03 Records Processed -> 2590000
• Database Unload Completed -- Unloaded 2595394 Records Detected 0 Errors• Mon Dec 5 13:44:05 2005
• Reject log is empty
December 8,9 2005 34
From our experience..
• Leave no stranded onpload threads behinds!
bob 7498 13 0 14:02:15 ? 0:00 /opt/ifmx/bin/onpload -Shp_fs_qa8_tcp -r4 -fbbob 7496 13 0 14:02:15 ? 0:00 /opt/ifmx/bin/onpload -Shp_fs_qa8_tcp -r4 -fbbob 7522 13 0 14:02:18 ? 0:00 /opt/ifmx/bin/onpload -Shp_fs_qa8_tcp -r4 -fbbob 7497 13 0 14:02:15 ? 0:00 /opt/ifmx/bin/onpload -Shp_fs_qa8_tcp -r4 -fbbob 7523 13 0 14:02:18 ? 0:00 /opt/ifmx/bin/onpload -Shp_fs_qa8_tcp -r4 -fbbob 7499 13 0 14:02:16 ? 0:00 /opt/ifmx/bin/onpload -Shp_fs_qa8_tcp -r4 -fbbob 13 1 0 14:02:15 ? 0:00 /opt/ifmx/bin/onpload -Shp_fs_qa8_tcp -r4 -fbbob 7519 13 0 14:02:18 ? 0:00 /opt/ifmx/bin/onpload -Shp_fs_qa8_tcp -r4 –fb
• It’s best to start with a clean onpload database• Watch nfiles (HP-UX) and memory• Don’t forget that level-0 on express loads!• Reindex outside of HPL
December 8,9 2005 35
References and other examples
• Search the IIUG Software repository for “onpload”– Several flavors of command line HPL like myonpload, ESQL/C
examples and “create_pload.sh”
• ONPLADM– IBM.COM Developerworks for techarticle on onpladm
Questions?
Jerry HamiltonJerry HamiltonDirector of Database Director of Database
AdministrationAdministrationFleishman-Hillard, IncFleishman-Hillard, Inc
Informix User Forum 2005 Moving Forward With Informix
Atlanta, Georgia December 8-9, 2005
Phooey on GUI!Using HPL from the command line
Jerry HamiltonJerry HamiltonDirector of Database Director of Database
AdministrationAdministrationFleishman-Hillard, IncFleishman-Hillard, Inc
Informix User Forum 2005 Moving Forward With Informix
Atlanta, Georgia December 8-9, 2005
Recommended