reduce the time to level 0 backup
We use Oracle 10.2.0.4.0 on Linux.
Currently, we have followed the backup strategy:
Level0 backup on Friday (it takes about 20 hours)
Leveal1 backup every day (it takes about 2 hours)
The maintenance window to deploy changes to database is from midday Saturday to Sunday lunch, which is four times a year. Now when you want to deploy in the maintenance window, Level0 backup taking so long that it consumes significant time to maintenance window. Therefore, we have very little time to deploy changes to the application in the database.
Can we have a few other backup strategy to avoid this backups for example gradually updated, so that Friday, we are able to prepare Level0 backup in less time, but we also want to have the ability to restore/recovery data back upto 7 days.
This is addressed in the next version, with backups of several sections. A good source of motivation for the upgrade to 11.x, 12.x.
Tags: Database
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select
explain plan
/*+ parallel(b, 10) parallel(a 10) parallel(f, 10) parallel(s 10) */
(((Category.Customer_Meter_Reading)/(Category.Customer_All_Meter_Reading))*100) as Count_of_customers, -- % of Customers
Count(g.Anlage) as Count_Of_Supplypoints, -- Count of Supply points
case
When a.cokey = '1000' then 'Premier Energy' -- Customer Segment
When a.cokey = '2000' then 'Energy First'
When a.cokey = '3000' then 'PAYGE'
end as Customer_Segment,
case
when nvl(df.SPARTE,'X') = 'X' then 'Dual Fuel'
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case
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when b.SPARTE ='02' then 'Gas'
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end Product,
case
when b.fdgrp = '0000000001' then 'Direct Debit - QVDD' --PayMethod
when b.fdgrp = '0000000002' then 'Direct Debit - CPS'
when b.fdgrp = '0000000003' then 'Standing Order'
when b.fdgrp = '0000000004' then 'CPS - APT'
when b.fdgrp = '0000000005' then 'Magnetic Card'
when b.fdgrp = '0000000006' then 'CPS QEP'
when b.fdgrp = '0000000007' then 'Cash / Cheque'
when b.fdgrp = '0000000008' then 'Fuel Direct'
when b.fdgrp = '0000000009' then 'Prepayment'
when b.fdgrp = '0000000010' then 'Pending Fuel Direct'
else 'Other'
end as Paymethod,
case
when f.TARIFART='E-CAP4' then 'E-CAP4 - Price Protection April 2009'
when f.TARIFART='E-CAP5' then 'E-CAP5 - Price Promise'
when f.TARIFART='E-FIX2' then 'E-FIX2 - Price Protection 2010'
when f.TARIFART='E-FIX4' then 'E-FIX4 - Click Energy'
when f.TARIFART='E-FIX5' then 'E-FIX5 - Price Protection December 2009'
when f.TARIFART='E-FIX13' then 'E-FIX13 - Fix & Fall'
when f.TARIFART='E-FIX12' then 'E-FIX12 - Fix & Fall 2'
when f.TARIFART='E-FIX10' then 'E-FIX10 - Click Energy 2'
when f.TARIFART='E-FIX14' then 'E-FIX14 - Essentials (Social Tariff)'
when f.TARIFART='E-FIX6' then 'E-FIX6 - Discounted Energy'
when f.TARIFART='E-FIX16' then 'E-FIX16 - Click Energy 3'
when f.TARIFART='E-FIX20' then 'E-FIX20 - Market Tracker'
when f.TARIFART='E-FIX17' then 'E-FIX17 - Future Energy'
when f.TARIFART='E-FIX18' then 'E-FIX18 - Zero Carbon'
when f.TARIFART='E-FIX21' then 'E-FIX21 - Click Energy 4'
when f.TARIFART='E-FIX23' then 'E-FIX23 - Price Protection February 2009'
when f.TARIFART='E-FIX22' then 'E-FIX22 - Click Energy 5'
when f.TARIFART='E-FIX19' then 'E-FIX19 - 10% Discount Tracker'
when f.TARIFART='E-FIX11' then 'E-FIX11 - Price Guarantee 2009'
when f.TARIFART='E-FIX24' then 'E-FIX24 - Price Guarantee 2009 Green Elec'
when f.TARIFART='G-CAP1' then 'G-CAP1 - Price Protection April 2009'
when f.TARIFART='G-CAP2' then 'G-CAP2 - Price Promise'
when f.TARIFART='G-FIX2' then 'G-FIX2 - Price Protection 2010'
when f.TARIFART='G-FIX4' then 'G-FIX4 - Click Energy'
when f.TARIFART='G-FIX5' then 'G-FIX5 - Price Protection December 2009'
when f.TARIFART='G-FIX13' then 'G-FIX13 - Fix & Fall'
when f.TARIFART='G-FIX12' then 'G-FIX12 - Fix & Fall 2'
when f.TARIFART='G-FIX10' then 'G-FIX10 - Click Energy 2'
when f.TARIFART='G-FIX14' then 'G-FIX14 - Essentials (Social Tariff)'
when f.TARIFART='G-FIX6' then 'G-FIX6 - Discounted Energy'
when f.TARIFART='G-FIX16' then 'G-FIX16 - Click Energy 3'
when f.TARIFART='G-FIX20' then 'G-FIX20 - Market Tracker'
when f.TARIFART='G-FIX18' then 'G-FIX18 - Zero Carbon'
when f.TARIFART='G-FIX21' then 'G-FIX21 - Click Energy 4'
when f.TARIFART='G-FIX23' then 'G-FIX23 - Price Protection February 2009'
when f.TARIFART='G-FIX22' then 'G-FIX22 - Click Energy 5'
when f.TARIFART='G-FIX19' then 'G-FIX19 - 10% Discount Tracker'
when f.TARIFART='G-FIX11' then 'G-FIX11 - Price Guarantee 2009'
when f.TARIFART='E-FIX26' then 'E-FIX26 - Fixed Price 2011'
when f.TARIFART='G-FIX26' then 'G-FIX26 - Fixed Price 2011'
when f.TARIFART='E-FIX29' then 'E-FIX29 - ClickEnergy6'
when f.TARIFART='G-FIX29' then 'G-FIX29 - ClickEnergy6'
when f.TARIFART='E-FIX30' then 'E-FIX30 - DualFuel Extra (new Mason)'
when f.TARIFART='G-FIX30' then 'G-FIX30 - DualFuel Extra (new Mason)'
when f.TARIFART='E-FIX31' then 'E-FIX31 - 15% Discount Tracker'
when f.TARIFART='G-FIX31' then 'G-FIX31 - 15% Discount Tracker'
when f.TARIFART='E-FIX32' then 'E-FIX32 - Fixed Price 2012'
when f.TARIFART='G-FIX32' then 'G-FIX32 - Fixed Price 2012'
when f.TARIFART='E-FIX34' then 'E-FIX34 - Rollback'
when f.TARIFART='G-FIX34' then 'G-FIX34 - Rollback'
else 'Other'
end Tariff --Proposition
From
Ever a,
Erch b,
ztucs_so_items s,
ztucs_so_items df,
EABL h,
EABLG g,
Ettifn f,
(Select
SUM(CASE WHEN h.ABLESTYP IN ('01','02')
THEN 1
ELSE 0
END) Customer_Meter_Reading,
SUM(CASE WHEN h.ABLESTYP IN ('01','02','03','04')
THEN 1
ELSE 0
END) Customer_All_Meter_Reading,
g.anlage as Category_Anlage
From
EABL h,
EABLG g
Where
(h.ABLESTYP in('01','02','03','04')
OR h.ISTABLART in('01','02','06','A','AR','C','CL','CO',
'DR','FE','GA','GC','GD','GE','GF','GG','GH','GI','GJ','GN',
'GO','GP','GT','GU','GV','MO','MR','P','PP','SI','SM','T',
'TR','PR','Q','IV','Z'))
AND h.Mandt = g.Mandt
AND g.ABLBELNR = h.ABLBELNR
GROUP BY g.anlage ) Category
where
a.loevm = ' ' -- Current Contract
AND b.fdgrp <> ' '
AND a.Anlage <> ' '
AND f.Anlage <> ' '
AND s.item_type in ('02', '03') -- Move-in or Acquisition
AND a.auszdat = '99991231'
AND (f.bis is null OR (f.bis ='99991231' AND f.inaktiv = ' ')) -- facts
AND f.operand in('ERT-FIX','ERT-CAP','GRT-FIX','GRT-CAP')
AND g.ABLESGR = '06'
AND s.move_date > -- Opening Meter Read
( Case
when a.cokey in('1000','2000','3000')
then (SELECT TO_CHAR(SYSDATE - 400, 'yyyymmdd') FROM dual) -- 52 WEEKS and 35 days ago data
end
)
AND s.move_date <
(
Case
when a.cokey IN('1000','2000','3000')
then (SELECT TO_CHAR(SYSDATE , 'yyyymmdd') FROM dual) -- Current date
end
)
-- AND a.VKONTO = b.VKONT
AND a.MANDT = b.MANDT
AND a.VERTRAG = b.VERTRAG
AND b.VKONT (+) = s.VKONT
AND s.MANDT = b.MANDT
AND g.MANDT = h.MANDT
AND g.ABLBELNR = h.ABLBELNR
AND a.anlage=g.anlage
AND a.Anlage(+) = f.Anlage
AND df.ITEM_TYPE in ('02', '03') ----Dual Fuel Check
AND df.MANDT(+) = s.MANDT
AND df.SO_KEY(+) = s.SO_KEY
AND df.SO_ITEM_KEY(+) <> s.SO_ITEM_KEY
AND df.SPARTE(+) <> s.SPARTE
AND s.ANLAGE = Category.Category_Anlage
group by
/*+ parallel(b, 10) */
'hint6',
case
when nvl(df.SPARTE,'X') = 'X' then 'Dual Fuel'
else
case
when b.SPARTE ='01' then 'Electricity' --Product
when b.SPARTE ='02' then 'Gas'
end
end ,
f.TARIFART,
a.cokey,
b.fdgrp,
Category.Customer_Meter_Reading,
Category.Customer_All_Meter_ReadingPLAN_TABLE_OUTPUT
Note: On each of the tables we have a field called mandt, who is the field of indexes for all tables listed below.
Plan hash value: 2310571763
------------------------------------------------------------------------------------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes |TempSpc| Cost (%CPU)| Time | TQ |IN-OUT| PQ Distrib |
------------------------------------------------------------------------------------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | 2574 | 771K| | 12M (14)| 40:16:00 | | | |
| 1 | PX COORDINATOR | | | | | | | | | |
| 2 | PX SEND QC (RANDOM) | :TQ10010 | 2574 | 771K| | 12M (14)| 40:16:00 | Q1,10 | P->S | QC (RAND) |
| 3 | HASH GROUP BY | | 2574 | 771K| | 12M (14)| 40:16:00 | Q1,10 | PCWP | |
| 4 | PX RECEIVE | | 2574 | 771K| | 12M (14)| 40:16:00 | Q1,10 | PCWP | |
| 5 | PX SEND HASH | :TQ10009 | 2574 | 771K| | 12M (14)| 40:16:00 | Q1,09 | P->P | HASH |
| 6 | HASH GROUP BY | | 2574 | 771K| | 12M (14)| 40:16:00 | Q1,09 | PCWP | |
|* 7 | HASH JOIN | | 3696M| 1056G| | 11M (12)| 39:02:50 | Q1,09 | PCWP | |
| 8 | PX RECEIVE | | 59774 | 15M| | 1390K (10)| 04:38:06 | Q1,09 | PCWP | |
| 9 | PX SEND HASH | :TQ10008 | 59774 | 15M| | 1390K (10)| 04:38:06 | Q1,08 | P->P | HASH |
| 10 | BUFFER SORT | | 2574 | 771K| | 12M (14)| 40:16:00 | Q1,08 | PCWP | |
| 11 | NESTED LOOPS | | 59774 | 15M| | 1390K (10)| 04:38:06 | Q1,08 | PCWP | |
|* 12 | FILTER | | | | | | | Q1,08 | PCWC | |
| 13 | NESTED LOOPS OUTER | | 59774 | 13M| | 1370K (10)| 04:34:06 | Q1,08 | PCWP | |
|* 14 | HASH JOIN | | 59774 | 12M| 87M| 1343K (10)| 04:28:45 | Q1,08 | PCWP | |
| 15 | PX RECEIVE | | 13M| 723M| | 27311 (6)| 00:05:28 | Q1,08 | PCWP | |
| 16 | PX SEND HASH | :TQ10006 | 13M| 723M| | 27311 (6)| 00:05:28 | Q1,06 | P->P | HASH |
| 17 | PX BLOCK ITERATOR | | 13M| 723M| | 27311 (6)| 00:05:28 | Q1,06 | PCWC | |
|* 18 | TABLE ACCESS FULL | ZTUCS_SO_ITEMS | 13M| 723M| | 27311 (6)| 00:05:28 | Q1,06 | PCWP | |
| 19 | PX RECEIVE | | 33M| 5104M| | 1284K (11)| 04:16:49 | Q1,08 | PCWP | |
| 20 | PX SEND HASH | :TQ10007 | 33M| 5104M| | 1284K (11)| 04:16:49 | Q1,07 | P->P | HASH |
|* 21 | HASH JOIN BUFFERED | | 33M| 5104M| 59M| 1284K (11)| 04:16:49 | Q1,07 | PCWP | |
| 22 | PX RECEIVE | | 4882K| 540M| | 950K (11)| 03:10:02 | Q1,07 | PCWP | |
| 23 | PX SEND HASH | :TQ10004 | 4882K| 540M| | 950K (11)| 03:10:02 | Q1,04 | P->P | HASH |
|* 24 | HASH JOIN | | 4882K| 540M| | 950K (11)| 03:10:02 | Q1,04 | PCWP | |
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| 27 | PX SEND HASH | :TQ10002 | 1424K| 47M| | 185K (10)| 00:37:10 | Q1,02 | P->P | HASH |
| 28 | PX BLOCK ITERATOR | | 1424K| 47M| | 185K (10)| 00:37:10 | Q1,02 | PCWC | |
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| 40 | PX BLOCK ITERATOR | | 188M| 7554M| | 279K (11)| 00:55:58 | Q1,05 | PCWC | |
|* 41 | TABLE ACCESS FULL | ERCH | 188M| 7554M| | 279K (11)| 00:55:58 | Q1,05 | PCWP | |
| 42 | FAST DUAL | | 1 | | | 2 (0)| 00:00:01 | | | |
| 43 | FAST DUAL | | 1 | | | 2 (0)| 00:00:01 | | | |
|* 44 | TABLE ACCESS BY INDEX ROWID | ZTUCS_SO_ITEMS | 1 | 30 | | 4 (0)| 00:00:01 | Q1,08 | PCWP | |
|* 45 | INDEX RANGE SCAN | PK_ZTUCS_SO_ITEMS | 1 | | | 3 (0)| 00:00:01 | Q1,08 | PCWP | |
|* 46 | INDEX RANGE SCAN | PK_EABL | 1 | 25 | | 3 (0)| 00:00:01 | Q1,08 | PCWP | |
| 47 | BUFFER SORT | | | | | | | Q1,09 | PCWC | |
| 48 | PX RECEIVE | | 15M| 529M| | 10M (12)| 34:19:02 | Q1,09 | PCWP | |
| 49 | PX SEND HASH | :TQ10001 | 15M| 529M| | 10M (12)| 34:19:02 | | S->P | HASH |
| 50 | VIEW | | 15M| 529M| | 10M (12)| 34:19:02 | | | |
| 51 | HASH GROUP BY | | 15M| 958M| 37G| 10M (12)| 34:19:02 | | | |
|* 52 | HASH JOIN | | 487M| 30G| 16G| 6939K (10)| 23:07:59 | | | |
|* 53 | TABLE ACCESS FULL | EABL | 414M| 11G| | 4157K (12)| 13:51:29 | | | |
| 54 | INDEX FAST FULL SCAN | PK_EABLG | 488M| 16G| | 707K (9)| 02:21:26 | | | |
------------------------------------------------------------------------------------------------------------------------------------------------------
Predicate Information (identified by operation id):
---------------------------------------------------
7 - access("S"."ANLAGE"="CATEGORY"."CATEGORY_ANLAGE")
12 - filter("DF"."ITEM_TYPE"='02' OR "DF"."ITEM_TYPE"='03')
14 - access("B"."VKONT"="S"."VKONT" AND "S"."MANDT"="B"."MANDT")
filter("S"."MOVE_DATE">CASE "A"."COKEY" WHEN '1000' THEN (SELECT TO_CHAR(SYSDATE@!-400,'yyyymmdd') FROM "SYS"."DUAL" "DUAL") WHEN
'2000' THEN (SELECT TO_CHAR(SYSDATE@!-400,'yyyymmdd') FROM "SYS"."DUAL" "DUAL") WHEN '3000' THEN (SELECT TO_CHAR(SYSDATE@!-400,'yyyymmdd')
FROM "SYS"."DUAL" "DUAL") END AND "S"."MOVE_DATE"<CASE "A"."COKEY" WHEN '1000' THEN (SELECT TO_CHAR(SYSDATE@!,'yyyymmdd') FROM "SYS"."DUAL"
"DUAL") WHEN '2000' THEN (SELECT TO_CHAR(SYSDATE@!,'yyyymmdd') FROM "SYS"."DUAL" "DUAL") WHEN '3000' THEN (SELECT
TO_CHAR(SYSDATE@!,'yyyymmdd') FROM "SYS"."DUAL" "DUAL") END )
18 - filter("S"."ITEM_TYPE"='02' OR "S"."ITEM_TYPE"='03')
21 - access("A"."MANDT"="B"."MANDT" AND "A"."VERTRAG"="B"."VERTRAG")
24 - access("A"."ANLAGE"="G"."ANLAGE")
25 - access("A"."ANLAGE"="F"."ANLAGE")
29 - filter("F"."BIS"='99991231' AND ("F"."OPERAND"='ERT-CAP' OR "F"."OPERAND"='ERT-FIX' OR "F"."OPERAND"='GRT-CAP' OR
"F"."OPERAND"='GRT-FIX') AND "F"."INAKTIV"=' ' AND "F"."ANLAGE"<>' ')
33 - filter("A"."AUSZDAT"='99991231' AND "A"."LOEVM"=' ' AND "A"."ANLAGE"<>' ')
37 - filter("G"."ABLESGR"='06' AND "G"."ANLAGE"<>' ')
41 - filter("B"."FDGRP"<>' ')
44 - filter("DF"."SPARTE"(+)<>"S"."SPARTE")
45 - access("DF"."MANDT"(+)="S"."MANDT" AND "DF"."SO_KEY"(+)="S"."SO_KEY")
filter("DF"."SO_ITEM_KEY"(+)<>"S"."SO_ITEM_KEY")
46 - access("G"."MANDT"="H"."MANDT" AND "G"."ABLBELNR"="H"."ABLBELNR")
52 - access("H"."MANDT"="G"."MANDT" AND "G"."ABLBELNR"="H"."ABLBELNR")
53 - filter("H"."ABLESTYP"='01' OR "H"."ABLESTYP"='02' OR "H"."ABLESTYP"='03' OR "H"."ABLESTYP"='04' OR "H"."ISTABLART"='01' OR
"H"."ISTABLART"='02' OR "H"."ISTABLART"='06' OR "H"."ISTABLART"='A' OR "H"."ISTABLART"='AR' OR "H"."ISTABLART"='C' OR "H"."ISTABLART"='CL' OR
"H"."ISTABLART"='CO' OR "H"."ISTABLART"='DR' OR "H"."ISTABLART"='FE' OR "H"."ISTABLART"='GA' OR "H"."ISTABLART"='GC' OR "H"."ISTABLART"='GD'
OR "H"."ISTABLART"='GE' OR "H"."ISTABLART"='GF' OR "H"."ISTABLART"='GG' OR "H"."ISTABLART"='GH' OR "H"."ISTABLART"='GI' OR
"H"."ISTABLART"='GJ' OR "H"."ISTABLART"='GN' OR "H"."ISTABLART"='GO' OR "H"."ISTABLART"='GP' OR "H"."ISTABLART"='GT' OR "H"."ISTABLART"='GU'
OR "H"."ISTABLART"='GV' OR "H"."ISTABLART"='IV' OR "H"."ISTABLART"='MO' OR "H"."ISTABLART"='MR' OR "H"."ISTABLART"='P' OR
"H"."ISTABLART"='PP' OR "H"."ISTABLART"='PR' OR "H"."ISTABLART"='Q' OR "H"."ISTABLART"='SI' OR "H"."ISTABLART"='SM' OR "H"."ISTABLART"='T' OR
"H"."ISTABLART"='TR' OR "H"."ISTABLART"='Z')
We do not have privileges to create indexes in our database.
Please do what is necessary...
Thanks in advancesamuraibala wrote:
Hi allWhen I run this query, it will take more time to run it... Please suggest me... I added parallael tips... can we add advice to this request
The biggest contributor under the plan displayed is the following view inline, that is running a series on the large table EABL sweep. You might consider adding a hint of parallel, for example like this:
(Select / * + parallel (h) * /)
SUM (CASE WHEN h.ABLESTYP IN ('01 ', ' 02')
THEN 1
0 OTHERWISE
END Customer_Meter_Reading),
SUM (CASE WHEN h.ABLESTYP IN ('01', '02', ' 03', ' 04')
THEN 1
0 OTHERWISE
END Customer_All_Meter_Reading),
g.Anlage as Category_Anlage
Of
EABL h,
EABLG g
Where
(h.ABLESTYP in ('01 ',' 02','03 ', ' 04')
OR h.ISTABLART ('01', ' 02 ', ' 06', 'A', 'AR', ' it 'CL', 'CO',)
'DR', 'FE', 'GA', 'GC', 'GD', "GE", "GF", "GG", "GH", "GI", "GJ", "GN"
'GO', 'PG', 'GT', 'GU', 'GV', 'MO', 'SIR', 'P', 'PP', 'IF', 'DM', 'T'.
'TR', 'PR', 'Q', 'IV', 'Z'))
AND h.Mandt = g.Mandt
AND g.ABLBELNR = h.ABLBELNR
GROUP BY g.anlage) categoryI don't know if the following two expressions are sensitive:
First of all, you need not to use a scalar subquery to evaluate this constant expression, a simple TO_CHAR (SYSDATE - 400, 'YYYYMMDD') should be sufficient
Secondly, why do you not use TO_CHAR? Is MOVE_DATE a TANK or a DATE column? If it's a DATE column (as its name suggests) then simply use trunc (SYSDATE - 400) instead of TO_CHAR (...)
Thirdly, what happens if HOKEY is not in ('1000', '2000' 3000')? Then these expressions return the NULL value which will efficiently filter on these files. What is your intention?AND s.move_date >-read meter opening
(Case
where a.cokey in ('1000 ',' 2000 ', ' 3000')
then (SELECT TO_CHAR(SYSDATE-400, 'yyyymmdd') FROM dual) - 52 WEEKS and 35 weeks ago given
end
)
AND s.move_date
(
Case
where a.cokey IN ('1000 ', '2000','3000 ')
then (SELECT TO_CHAR (SYSDATE, 'yyyymmdd') FROM dual) - current date
end
)I don't think that it is a valid position for a tip, so I don't know what plan you make with it?
Group
/ * + parallel (10B) * /.Kind regards
RandolfOracle related blog stuff:
http://Oracle-Randolf.blogspot.com/SQLTools ++ for Oracle (Open source Oracle GUI for Windows):
http://www.sqltools-plusplus.org:7676 /.
http://sourceforge.NET/projects/SQLT-pp/ -
Dear expert;
RMAN for level 0 backup takes about 05:26 hours, size of backup is now 312 GB I activated the block check the track and it reduces the time for the additional workforce 1 of 2 hours to nearly 3 minutes.
database displays the largest storage space is "users".
I want some useful suggestions to reduce his time or is it possible to break the level 0 backup. I can assign channels, but ultimately it will take time when you take 'users' tablepace backup
For now, I take the backup on USB & his version is 2.0
ConcerningAs you take backup on a USB there is not much that can be done to improve the speed. If you are worried about the backup to slow down... then you might think that taking the backup to local drive (which would be faster and more efficient) and then move the backups from disk on USB.
This can be done in one script backup as part 2 operation.
1) take backup on the disk.
(2) copy the backup to USB key and delete the backups from disk.There are many additional features that you can add to improve it commentator.
Kind regards
V -
What is the need for level 0 and level 1 backup?
I am a bit confused about the need for level 0 and level 1 backup. Oracle has proposed strategy in 10g creates only level 1 backup continues to not to break and not to create any level of 0 after the first backup of level 0. But I had seen in the document Oracle Database Backup & Recovery basis he suggests to create backup of level 0 on weekly or monthly basis. There?
Secondly according to my understanding when creating oracle backup of level 1 first creates a level 0 backup that contain also copies of data image files and then apply an incremental copies of the image, once the incremental backup is applied on the copy of the image you don't have to the previous incremental backups. Am I wrong?
If I'm right, what is the difference between level 0 & backup of level 1? and after the level 0 backup you must also all previous backups.
PL. help me to clarify my questions in this regard.
Kind regards
VassalloWhat is the most reliable in terms of recovery?
I do not see the differences in terms of recovery, the two strategies are reliable.
There is an advantage in terms of recovery time expected, Oracle says:
/*
Incorporate gradually update the backup in your backup strategy shortens the time of recovery as provided. The reason is that media recovery right now or at some point in the recent past may begin at the time of the last backup of level 1 applied, rather than at the time of the last full database backup.
*/In a regular incremental backup strategy you always go back to a level 0 backup and then to apply everything follows level 1 backups + archivelogs. But - for an incremental backup set to day - it's a little tricky to emerging a window of recovery, normally relies on redundancy 1, i.e. that a backup is retained, you cannot go back, this type of backup is designed for a quick and complete recovery.
But there is a solution (I don't think there is place in EM), even if you're on 10g, see the 11 g documentation, he explains fuller:
http://download.Oracle.com/docs/CD/B28359_01/backup.111/b28270/rcmbckba.htm#BRADV89532
Werner
-
Is there a way to SHORTEN the time of compilation
Hey guys,.
It is extremely laborious when you book only little change in the labview project and the overall program needs to be recompiled all over again!
Need me often 30 minutes or more. He lead me almost crazy...
Is there anyone who have samilar experence and find a way to solve it, or even just shorten this boring waiting?
Thank you very much!
Nick
You can't really affect time itself, but you can affect how much/often it RECOMPILES.
For example this type of variable, is it used in a lot of vi? If this is some common AE, perhaps it can be divided in a couple different ones?
You can write to protect a folder which shouldn't really change and adjust the LV of "Treat read only VI as locked"
There is also a framework of LV in the .ini file that can facilitate the optimization that will reduce the time of compile/save.
/Y
-
How can I reduce reconfiguration time channel between acquisitions HAVE? Thank you
Hello world
I need to acquire signals from sin 40 (2000 kHz) at a sampling rate of 250 kech. / s through using a daq card 6225 with its AIs. In order to achieve this sampling rate I must acquire all the samples of the first channel (something like 2000 samples), then the same thing with channel 2,... up to channel 40. My problem is that I am wasting a lot of time (about 170 ms) whenever I move a channel because Labview reconfigures the channels.
When I move a channel to acquire samples of 2000 the only parameter that changes is the string that's all.
I tried many things with the wizard DAQ and Daqmx examples but without success.
Is there a way to reduce the time between 2 acquisitions... paramating?
Any help would be great.
User
If you insist on the channels one by one, you can not avoid the delay. Of course, you can capture all channels at once. The effective sampling rate would be 6.25 kech. / s, if you did all the 40 at a time.
-
How to reduce the "offset applies"?
Hi guys,.
I use Oracle Dataguard on 11 GR 2 Oracle database with configuration of Broker:
DGMGRL> SHOW CONFIGURATION; Configuration - NAME_DG Protection Mode: MaxPerformance Databases: nameprod - Primary database namedg - Physical standby database Fast-Start Failover: DISABLED Configuration Status: SUCCESS
It's my time to delay apply:
DGMGRL> SHOW DATABASE NAMEDG Database - namedg Role: PHYSICAL STANDBY Intended State: APPLY-ON Transport Lag: 0 seconds Apply Lag: 26 minutes 53 seconds Real Time Query: ON Instance(s): NAMEDG Database Status: SUCCESS
I want to reduce the time 'applies', it is possible? Do you know a way?
Thanks in advance.
Hi guys, certainly the day before newspapers of recovery have been the problem. I created the missing waiting for redo logs (on the database pending), then the 'delay to apply' off to zero.
Kind regards.
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