database dump/load
DESCRIPTION
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. - PowerPoint PPT PresentationTRANSCRIPT
© 2002 Eaton Corporation. All rights reserved.
Database Dump/LoadDatabase 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--- ScatterTable Records Size Min Max Mean Count Factor FactorPUB.gltr_hist 118323698 24.4G 127 241 221 198899694 1.0 3.9PUB.absc_det 477 19.1K 41 41 41 477 1.0 6.2PUB.absr_det 89324 10.1M 97 195 118 89324 1.0 4.0PUB.acd_det 133684 9.2M 48 91 72 133684 1.0 3.8PUB.anl_det 1664 99.5K 35 79 61 1664 1.0 5.7PUB.ans_det 2224 127.3K 44 76 58 2224 1.0 5.5PUB.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 proutil dbanalys
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 proutil
dumpspecified 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
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
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 $xtabdump ]] && read a
done
35
Binary Dump Multi-Thread
DEF VAR X AS INT.
DEF VAR xx AS INT.
DEF VAR xcnt as INT.
def var w-str as char.
def var w-dbname as char format "x(50)".
def var w-dumpdir as char format "x(78)".
def var b as int.
def var bb as int.
DEF STREAM out1.
DEF STREAM out2.
DEF STREAM out3.
DEF STREAM out4.
DEF STREAM out5.
OUTPUT STREAM out1 TO "bdump1.sh".
OUTPUT STREAM out2 TO "bdump2.sh".
OUTPUT STREAM out3 TO "bdump3.sh".
OUTPUT STREAM out4 TO "bdump4.sh".
OUTPUT STREAM out5 TO "bdump5.sh".
36
clear all.
update w-dbname label "DB Name"
help "Enter Full path and DB name ie: /mfgpro/phr/db1/phrpmfg " skip
w-dumpdir label "Dump dir"
help "Enter Full path of the Dump directory"
with frame a side-labels scrollable.
Assign X = 1
xx = 0.
/* find the total number of tables first */
for each _file no-lock
where ( _file-number > 0 and _file-number < 30000):
xcnt = xcnt + 1.
end.
Binary 2/* create dump scripts */
b = 2.
FOR EACH _file NO-LOCK
WHERE (_file-number > 0 and _file-number < 30000)
break by _file-name:
xx = xx + 1.
w-str = " > " + _file-name + ".log ".
if xx mod b = 0 then assign b = b + 2
w-str = w-str + " &".
bb = xx mod b.
IF xx MOD (xcnt / 5) = 0 THEN X = X + 1.
/* display xx xcnt x b bb . pause. */
IF X = 1
THEN PUT STREAM out1 UNFORMATTED "$DLC/bin/proutil "
+ w-dbname + " -C dump “
+ _file-name + " " + w-dumpdir + w-str skip.
37
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.
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