1 / 40

Database Dump/Load

Database Dump/Load. Ben Holmes Eaton Corp. About Ben. Currently with Eaton Corp FPG division as a Sr. Progress DBA for the past 11 years Started Programming with Progress in 1989, version 4.2 Progress Consultant/DBA for over 12 years. Worked at QAD as Technical Service Manager.

roger
Télécharger la présentation

Database Dump/Load

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Database Dump/Load Ben Holmes Eaton Corp

  2. About Ben • Currently with Eaton Corp FPG division as a Sr. Progress DBA for the past 11 years • Started Programming with Progress in 1989, version 4.2 • Progress Consultant/DBA for over 12 years. • Worked at QAD as Technical Service Manager. • Currently administrate over 80 production environments (4-5 db’s each, over 320) • Sizes range from 20GB to 480GB

  3. Who are You? • Progress Version • Largest Database • Database Operating System

  4. Reasons NOT to Dump & Load • Because it is X months since the last time. • Because the vendor said we should. • Because we must in order to upgrade Progress. • Because we are told it will improve performance. • When’s the next 3 day weekend? • When is the best time based upon various statistics • Scatter Factor • Fragmentation Factor • Application and/or Utility Performance

  5. Why I would Dump/Load • Improve Performance by reducing Table Scatter Factor & Record Fragmentation • Reclaim Space in the Database • Migrate between different Progress Versions (e.g. from V9 to V10 with new storage area) • Migrate between different Platforms (e.g. Windows to HP/UX) • When is the best time based upon various statistics • Scatter Factor • Fragmentation Factor • Application and/or Utility Performance

  6. When you need to D&L? • Change the Database Blocksize (V8.2+) • Change the Records per Block (RPB) • Convert to Multiple Storage Areas (V9+) • Convert to OE10 Type 2 Storage Areas • Recover Data from a Corrupted Database

  7. Physical Scatter Factor • How close are the Records in a Table to each other physically • Obtained from proutil dbanalys/tabanalys • Progress recommendations are way low for most production databases; you will spend more weekends doing D&Ls then seeing your family

  8. Scatter Factor • For Large, Frequently Accessed Tables: • .9 Data overlap problem (bug) • 1.0 Green Flag - Perfect • 1.1-2.0 Probably OK • 2.1-3.0 Yellow Flag - Deteriorating • 3.1-4.0 Performance problems are probably being experienced • 4.1+ Red Flag - take action ASAP

  9. Example RECORD BLOCK SUMMARY FOR AREA "GLTRHIST" : 35 ------------------------------------------------------- -Record Size (B)- ---Fragments--- Scatter Table Records Size Min Max Mean Count Factor Factor PUB.gltr_hist 118323698 24.4G 127 241 221 198899694 1.0 3.9 PUB.absc_det 477 19.1K 41 41 41 477 1.0 6.2 PUB.absr_det 89324 10.1M 97 195 118 89324 1.0 4.0 PUB.acd_det 133684 9.2M 48 91 72 133684 1.0 3.8 PUB.anl_det 1664 99.5K 35 79 61 1664 1.0 5.7 PUB.ans_det 2224 127.3K 44 76 58 2224 1.0 5.5 PUB.an_mstr 1991 126.9K 42 82 65 1991 1.0 5.6

  10. Fragmentation Factor • A Fragment is a Record • A Record can consist of one or more Fragments • The more Fragments per Record the more I/O is required to read and update a Record • VSTs (_ActRecord) can tell you how much Excess Fragment I/O is actually occurring but not by table; also the statistics are somewhat suspicious

  11. General Setup • Archive & Purge as much data as possible • The D&L will take less time • The Scattering will be eliminated by the D&L • Perform an Index Rebuild (if possible) • Might improve performance enough to avoid a D&L but unlikely in my experience • Might reveal hidden DB corruption that needs to be dealt with first (i.e. 1124 errors) • Should make the dump process go faster

  12. Dump/Load Setup • Run & Time some Heavy Duty Reports (multi-table, many records, reproducible) • Run & Time proutildbanalys • Use Record Counts before the Dump and after the Load to Validate that the Load was successful • Might Reveal Corruption (i.e. 1124 errors)

  13. Disk Preparation • Consider Disabling Disk Mirroring • Extra Dump Space • Availability of 2nd Disk Controller • Potential (usually minor) Performance Gain • But don’t forget there may be overhead of re-syncing the mirrors • Dump to non-database disks if possible • AI/BI/Temp File Disks are good choices

  14. Dump/Load Options • “Classic” Dictionary Dump & Load • Bulk Loader • Binary Dump & Load • Parallel – Multi • Many Benefits • Difficult to Effectively Balance • Automating the process • Buffer COPY

  15. Classic / 4GL Dump • Progress Dictionary/Custom 4GL Code • Dictionary has a Simple Interface • Usually the Slowest Method • Dictionary Dump/Load Programs can be run non-interactively • Custom Coding requires 4GL experience • Dump files are subject to 2GB limit but can code around it

  16. Binary Dump • Binary Dump (V8.2 and later) • Documented & Supported • proutil command can only Dump/Load one table at a time (one proutil per Table) • Multi-Threading - parallel dump are possible • Dump files are portable • No 2GB limit (.b1 b.2….) • Larger than 2GB single dump file on V9.1B and later • Possibility exists of “carrying” Database corruption to the new Database

  17. Binary Dump Tips • Use the Read Only (-RO) • Benchmark • Don’t specify a large -B with -RO • Use bin.p (or bin-nt.p) on the BravePoint web site to generate D&L scripts (UNSUPPORTED) or dumpload.p in DBA Resource Kit • OE v10:proutil dbname -C dump table -index 0 • Thread by storage area.

  18. What Dump to Use • Do Parallel Dumps if… • You want to go home earlier • You have multiple CPUs • You have multiple (non-DB) disks with free space • 1-4 dump threads per CPU is usually safe • Once a table is finished dumping, you can start loading into a database on the other system or set of disks (I use the TEST DB)

  19. What to Consider • Forman stats “If a table is large (10+ million records), the Binary dump might not be the fastest method because it is single threaded” • Consider multiple, parallel, 4GL dumps • Bulk Load the Data (proutil bulkload) • Alternative in V9.1D+; you can use proutildumpspecified instead of dump but major limitations – more in a later slide

  20. Deep Thoughts • Sometimes using a non-primary index is faster particularly if the secondary index is ‘smaller’ • Don’t forget to dump Sequences and the User table (can’t Binary dump) • Don’t forget SQL92 Privileges and Database _user table.

  21. proutil dumpspecified • Can’t have multiple streams dumping a table to the directory at the same time (table.bd) • -index does not work • Primary Index needs to be a single Field • The Index must have the same name as the Field

  22. Load - Dictionary • Dictionary Load/Custom 4GL Code • Same Advantages & Disadvantages as the Dictionary/custom Dump • Slowest Option (except in Parallel - maybe...)

  23. Load - BulkLoad • Bulk Load • Option on proutil • Can load Dictionary or 4GL dump (.d) files • Very Fast but not quite as fast as Binary • Single Threaded only • Index Rebuild is required

  24. LOAD - Binary • Single or Parallel loads are possible • Start the Database Broker to: • Observe the speed (Records Created) • Avoid BI Recovery for every LOAD • Performance use the No Integrity (-i) Option • A number of problems(bugs) in the older versions (below 8.3C)

  25. Load - Parallel • V8 - NO, Increases the Scatter Factor; slow • V9/OE10 - One load thread per Area • Don’t Forget • No Integrity (-i) Big Cluster Size (16mb+) • APWs, BIW -spin • -bibufs No AI • -directio (maybe)

  26. Index Rebuild • Backup the Database BEFORE you start the Index Rebuild • If the Index Rebuild fails you might not be able to restart it • Disk Sort Method • Fastest (but single threaded) • Builds a more compact index • A Sort file is created on disk • Sort File on Non-DB Disks = 20% Faster

  27. Disk Sort • Disk Sort Method • Sort File Size Estimate: 1X-2X Data Size to be absolutely safe • The Sort file is subject to the 2GB limit until V9.1D SP07 or 08 • V8.* allows Multi-Volume Sort files • V8: Don't put TABs in the .srt file

  28. Memory Sort • Much Slower than Disk Sort • Less Compact Index • Use V9+ idxcompact to compact the Index • A compaction percentage can be specified • Can be run online or offline • Only in V9.1E and above • No Disk Space Required • Use a larger -B (but not too large)

  29. Index Rebuild Options • -TB 31 Disk Sort • -TM 32 Disk Sort • db.srt Multi-volume Sort file • -t Disk Sort; Unix • -B Useful for Memory Sort only • -SS V9.1B ‘build indexes’ option (shortly) • -SG Sort Group; SP07; default 48; use 64

  30. Belt & Suspenders • Compare Record Counts • Check Logs for Known & Unknown Errors • grep for fail, error, (1124) • Check for Success Binary • grep “ 0 errors” /tmp/dl/*.log | wc –l • grep “ dumped” /tmp/dl/*.log • grep “ loaded” /tmp/dl/*.log • ls –l /tmp/dl/*.d

  31. Buffer-Copy & Raw-Transfer • Very Fast • Eliminates The Middle Man (temp file IO operations) • Provides fine-grained, ABL level of control • Allows on the fly data manipulation • Useful when merging databases • Can use with remote connections to bridge version numbers. • In OE10.1 performance is essentially equal • Cannot use RAW-TRANSFER with -RO

  32. Benchmarks (by others) • Dict Load/Idx Inactive/idxbuild: 27:07 • Dict Load/Idx Active (3 threads):23:57 • Bulk Load/idxbuild: 16:10 • Serial Binary/idxbuild: 15:15 • Parallel Binary/idxbuild: 15:29 • Serial Binary with -SS: 19:56 • Parallel Binary with -SS: 38:04

  33. Eaton Benchmark • 80 GB MFG/PRO Database • Progress 8.3E • Single thread Binary dump time:6hrs • Multi-thread Binary dump time: 4.5hrs • Single thread Binary LOAD:10hrs • Multi-thread Binary Load:4.5 hrs • Index Rebuild: 12 hrs

  34. Eaton Benchmark • Progress 10.1C DB: 2.3GB Tab: 3mins • Data Dict Dump: 1:15 hrs • Longet table:47 min = multi-thread 47 mins • Single thread Binary dump time:00:17 hrs • Multi-thread Binary dump time:00:09hrs • ON NAS • All Var Ext Single thread Binary LOAD:9 min idx 12min • All Var Ext Multi-thread Binary Load:10min idx 12min • Fixed Ext Multi-thread Binary Load:13 mins indx 10 mins • On EMC disk • Multi-thread load 4 mins idx 5 mins

  35. Dictionary Dump Compare dbname=phroaux tfile=/cit/log/qad/$dbname.tabanalys.130916 lst=`ls -1 /prog_bkup_new/phr/ascii/*.d` for i in $lst do xdump=0 xtabdump=0 xtable=`grep filename= $i|cut -f2 -d"=" ` xdump=`grep records= $i|cut -f2 -d"="` xtabdump=$(grep -i "PUB.$xtable " $tfile|tr -s " " "" |cut -f2 -d" ") xdump=$(expr $xdump \* 1) xtabdump=$(expr $xtabdump \* 1) [[ $xdump -eq $xtabdump ]] && echo "Matched " $xtable :$xtabdump:$xdump: [[ ! $xdump -eq $xtabdump ]] && echo $i $xtable NO Match :${xtabdump}"-"${xdump}: [[ ! $xdump -eq $xtabdump ]] && read a done

  36. Binary Dump Multi-Thread clear all. update w-dbname label "DB Name" help "Enter Full path and DB name ie: /mfgpro/phr/db1/phrpmfg " skip w-dumpdir label "Dump dir" help "Enter Full path of the Dump directory" with frame a side-labels scrollable. Assign X = 1 xx = 0. /* find the total number of tables first */ for each _file no-lock where ( _file-number > 0 and _file-number < 30000): xcnt = xcnt + 1. end. DEF VAR X AS INT. DEF VAR xx AS INT. DEF VAR xcnt as INT. defvar w-str as char. defvar w-dbname as char format "x(50)". defvar w-dumpdir as char format "x(78)". defvar b as int. defvar bb as int. DEF STREAM out1. DEF STREAM out2. DEF STREAM out3. DEF STREAM out4. DEF STREAM out5. OUTPUT STREAM out1 TO "bdump1.sh". OUTPUT STREAM out2 TO "bdump2.sh". OUTPUT STREAM out3 TO "bdump3.sh". OUTPUT STREAM out4 TO "bdump4.sh". OUTPUT STREAM out5 TO "bdump5.sh".

  37. Binary 2 IF X = 2 THEN PUT STREAM out2 UNFORMATTED "$DLC/bin/proutil " + w-dbname + " -C dump " + _file-name + " " + w-dumpdir + w-str skip. IF X = 3 THEN PUT STREAM out3 UNFORMATTED "$DLC/bin/proutil " + w-dbname + " -C dump " + _file-name + " " + w-dumpdir + w-str skip. IF X = 4 THEN PUT STREAM out4 UNFORMATTED "$DLC/bin/proutil " + w-dbname + " -C dump " + _file-name + " " + w-dumpdir + w-str skip. IF X = 5 THEN PUT STREAM out5 UNFORMATTED "$DLC/bin/proutil " + w-dbname + " -C dump " + _file-name + " " + w-dumpdir + w-str skip. END. OUTPUT STREAM out1 CLOSE. OUTPUT STREAM out2 CLOSE. OUTPUT STREAM out3 CLOSE. OUTPUT STREAM out4 CLOSE. OUTPUT STREAM out5 CLOSE. /* create dump scripts */ b = 2. FOR EACH _file NO-LOCK WHERE (_file-number > 0 and _file-number < 30000) break by _file-name: xx = xx + 1. w-str = " > " + _file-name + ".log ". if xx mod b = 0 then assign b = b + 2 w-str = w-str + " &". bb = xx mod b. IF xx MOD (xcnt / 5) = 0 THEN X = X + 1. /* display xx xcnt x b bb . pause. */ IF X = 1 THEN PUT STREAM out1 UNFORMATTED "$DLC/bin/proutil " + w-dbname + " -C dump “ + _file-name + " " + w-dumpdir + w-str skip.

  38. Additional Resources • http://www.greenfieldtech.com/downloads.shtml • Buffer-Copy • Pro D&L : BravePoint • minimize D&L down time

  39. Questions?

  40. Thank you foryour time

More Related