Speeding up full backup of Replicate database ASE 15.5

Greetings all
I need to speed up replicate database backup.
ASE version 15.5
Adaptive Server Enterprise/15.5/EBF 20633 SMP ESD#5.2/P/RS6000/AIX 5.3/asear155/2602/64-bit/FBO/Sun Dec 9 11:59:29 2012
Backup Server/15.5/EBF 20633 ESD#5.2/P/RS6000/AIX 5.3/asear155/3350/32-bit/OPT/Sun Dec 9 08:34:37 2012
RS version
Replication Server/15.7.1/EBF 21656 SP110 rs1571sp110/RS6000/AIX 5.3/1/OPT64/Wed Sep 11 12:46:38 2013
Primary database is 1.9 TB about 85% occupied
Replicate database is same size but used about 32% (mostly dbo tables are replicated)
As noted above backup sever is 32 bit on AIX.
SIMILARITIES
Both servers use SAN with locally mounted folder for backup files/stripes.
Databases are on 'raw' devices for data and log
Both backup servers have the similar RUN files with following
-N25 \
-C20 \
-M/sybase/15/ASE-15_0/bin/sybmultbuf \
-m2000 \
Number of stripes are 20 for both primary and replicate databases.
DIFFERENCES
Replicate has less memory and less number of engines.
Devices on primary are mostly 32 GB and those on replicate are mostly 128 GB
OBSERVATIONS
Full Back up times on primary consistently about 1 hour.
Full Back up times on replicate are consistently double that (120 to 130 minutes).
Full Backup with suspended replication or with minimal activity does not reduce the run times much.
What do I need to capture to pinpoint cause of the slow backup on replicate side ?
Thanks in advance
Avinash

Mark
Thanks for the inputs.
We use compression level 2 on both primary and replicate.
This was tried out before upgrade to 15.5 and seems good enough.
BTW on a different server I also tried new compression levels 100 and 101.
for database of same size and did not get substantial reduction in run times.
Stripe sizes increased from 23 GB to 30-33 GB.
As far as I have noted Replicate side is not starved for CPU.
sp_sysmon outputs during the backup period do not show high CPU usage.
Wll it be accurate to to say that like a huge report query, backup activity also churns the caches ?
(i.e. each allocated/used page if not found in the cache is brought in cache by a physical read )
Avinash

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instdb1.__db_cache_size=1107296256
instdb2.__db_cache_size=1023410176
instdb2.__java_pool_size=16777216
instdb1.__java_pool_size=16777216
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instdb2.thread=2
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RMAN-00571: ===========================================================
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RMAN-00571: ===========================================================
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Executed as user: abc\user1. ... 2004-2009, Quest Software Inc. Registered Name: abc INC
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Hi bestrongself,
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http://www.petri.co.il/create-backup-job-in-sql-server.htm
Regards,
Sofiya Li
If you have any feedback on our support, please click here.
Sofiya Li
TechNet Community Support

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null

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Hi,
I have done a full backup for the database oracle 11g using:
run{
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set limit channel c1 kbytes 102400;
sql 'alter system archive log current';
backup full tag 'dbfull' format 'd:\dbbackup\f_%d_%u_%s_%p_%t' database include current controlfile;
backup archivelog all delete input format 'd:\dbbackup\al__%d_%u_%s_%p_%t';
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Thanks Werner!
I finally find the correct backuppiece for the controlfile.
D:\dbbackup
2010-03-19 18:41 <DIR> .
2010-03-19 18:41 <DIR> ..
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2010-03-19 18:41 104,857,600 F_ORCL_02L8VSJ0_2_11_714076768
2010-03-19 18:41 104,857,600 F_ORCL_02L8VSJ0_2_12_714076768
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2010-03-19 18:39 104,857,600 F_ORCL_02L8VSJ0_2_1_714076768
2010-03-19 18:39 104,857,600 F_ORCL_02L8VSJ0_2_2_714076768
2010-03-19 18:40 104,857,600 F_ORCL_02L8VSJ0_2_3_714076768
2010-03-19 18:40 104,857,600 F_ORCL_02L8VSJ0_2_4_714076768
2010-03-19 18:40 104,857,600 F_ORCL_02L8VSJ0_2_5_714076768
2010-03-19 18:40 104,857,600 F_ORCL_02L8VSJ0_2_6_714076768
2010-03-19 18:40 104,857,600 F_ORCL_02L8VSJ0_2_7_714076768
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Hi,
>>As far as I know, in order to take a full backup of a database, one need to shutdown a database.
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Oracle Backup and Recovery
http://www.oracle.com/technology/deploy/availability/htdocs/BR_Overview.htm
Oracle Backup and Recovery FAQ
http://orafaq.com/faqdbabr.htm
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Hi!
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Hi,
Read this sap note
Note 952080 - BR*Tools fail with BR0252E Function stat() failed
[https://websmp130.sap-ag.de/sap(bD1lbiZjPTAwMQ==)/bc/bsp/spn/sapnotes/index2.htm?numm=952080]
Symptom
BR*Tools fail with the following error messages:
BR0252E Function stat() failed for 'origlog' at location BrDiskStatGet-1
BR0253E errno 2: No such file or directory
BR0277E Determination of disk volume status for origlog failed
Other terms
BR*Tools
Reason and Prerequisites
The problem is caused by configuration problems with soft links.
Solution
Due to technical reasons, BR*Tools does not accept relative soft links in the SAPDATA_HOME directory. The following soft links cause the above mentioned errors:
/oracle/SID/origlogA -> origlog
/oracle/SID/sapdata9 -> sapdata
Use absolute soft links instead:
/oracle/SID/origlogA -> /oracle/SID/origlog
/oracle/SID/sapdata9 -> /oracle/SID/sapdata
Thanks
Siva

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Hi,
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The recovery point volume will only contain delta changes applied to the database files. As the changed blocks overwrite the files on the replica during express full backup, VSS (volsnap.sys) driver copies the old blocks about to be overwritten
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Hope this helps explain what you are seeing.
Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread. Regards, Mike J. [MSFT]
This posting is provided "AS IS" with no warranties, and confers no rights.

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CONFIGURE DATAFILE BACKUP COPIES FOR DEVICE TYPE DISK TO 1; # default
CONFIGURE ARCHIVELOG BACKUP COPIES FOR DEVICE TYPE DISK TO 1; # default
CONFIGURE CHANNEL DEVICE TYPE DISK FORMAT '/backup/app/LEVEL0_%u_%T';
CONFIGURE MAXSETSIZE TO UNLIMITED; # default
CONFIGURE ENCRYPTION FOR DATABASE OFF; # default
CONFIGURE ENCRYPTION ALGORITHM 'AES128'; # default
CONFIGURE ARCHIVELOG DELETION POLICY TO NONE; # default
CONFIGURE SNAPSHOT CONTROLFILE NAME TO '/opt/oracle/product/10gR2/db_1/dbs/snapcf_db01.f'; # default
# Database RAC Logswitch
sql 'alter system archive log current';
# Fullbackup Database - Perform incremental level 0 backup
run {
BACKUP incremental level 0 format '/backup/app/%d_Level0_%T_%U' database PLUS ARCHIVELOG format '/backup/app/%d_A
rchivelog_%T_%U';
}

An Incremental Backup is a fresh backup of all the changes that have occurred in the database since the last backup.
Thus, a Level 1 Incremental Backup is a smaller backup than the preceding Level 0 Backup.
However, when you say :
I like to have a daily full backup of the database where just the changes to the full backup are backed up. But the backupfile should always be a full backup.You seem to want an Incrementally Updated Backup. That is a backup strategy where your Backup itself is updated.
I am not sure if this is available in the Standard Edition.
Here's documentation on Incrementally Updated Backups : at 4.4.3 Incrementally Updated Backups: Rolling Forward Image Copy Backups
http://download.oracle.com/docs/cd/B19306_01/backup.102/b14192/bkup004.htm#sthref408
While this is the "normal" Incremental Backups : at 4.4 RMAN Incremental Backups
http://download.oracle.com/docs/cd/B19306_01/backup.102/b14192/bkup004.htm#sthref383
Hemant K Chitale
http://hemantoracledba.blogspot.com

Syntax for full backup thru RMAN

hi all ..
i have oracle 11g installed on M5000, Solaris 10
i want to take full backup of my database thru RMAN
i have enter following on backup server
. .db/env
connect catalog rrkas/rr345
(connected)
connect target sys/root123@grid1
(connected)
RMAN> run {
allocat channel dev1 type disk;
backup database
format '/export/home/oracle/dumps/grid3_%t_%sp%p';
release channel dev1;
it started the job.On my dbserver file is created as per the format.
just want to ask, is it the right way to take full/physical backup? Is this backup enough to fully recover the files, in case a new RAC is added to the cluster?
thanks in advance.

If your database is running in ARCHIVELOG mode, this is not enough: you must backup archived redo logs for example with
backup database plus archivelog:Read about consistent and inconsistent backups in http://download.oracle.com/docs/cd/B28359_01/backup.111/b28270/rcmcncpt.htm#BABIHBBE and about archived redo logs backups in http://download.oracle.com/docs/cd/B28359_01/backup.111/b28270/rcmbckba.htm#i1006454
Edited by: P. Forstmann on 20 nov. 2009 07:42

Full backup ( ~ 1 TB ) using external HD - speed USB vs. Firewire vs. eSATA - what are relative speeds - how to install eSATA on mid-2010 Mac Pro desktop ( dual hex-core processors)_

    Hi All,
     I'm trying to resume regular scheduled Full backup ( ~ 1 TB ) of drives using external HD (to allow off-site redundant backup storage) .
     What are relative speeds of USB vs. Firewire vs. eSATA ?
     I suspect eSATA connection may be considerably faster … how to install eSATA on mid-2010 Mac Pro desktop ( dual hex-core processors)?
      ( The quicker and easier backup protocol is, the more likely one is to use it to backup on a routine repetitive basis.)
Thanks

Jim Bogy wrote:
...I suspect eSATA connection may be considerably faster … how to install eSATA on mid-2010 Mac Pro desktop ( dual hex-core processors)?
      ( The quicker and easier backup protocol is, the more likely one is to use it to backup on a routine repetitive basis.)
Adding a USB 3.0+eSATA PCIe card, which The hatter mentions, is the best solution that I've found. See http://eshop.macsales.com/item/CalDigit/FASTA6GU3/. The card is not cheap, but the USB 3.0 works flawlessly (which can't be assumed; ask me how I know) and the eSATA connection allows booting from the connected drive. Grant Bennet-Alder's point about HD speed is important to consider; in addition, the size of the individual files being backed up and where on the backup disk they're going will affect overall transfer speed. For example, using the USB 3.0 connection on that CalDigit card going to a Toshiba 3TB external, the transfer rate for a big file (say a virtual machine file) from an internal SSD boot drive was about 145 MB/sec while a bunch of little files might drop to 30 MB/sec and both rates decrease as an inner partition on the external is used. All told, a nearly 700 GB backup took under 1.5 hours. Using a HD as the source added almost an extra hour, though a WD external was used for that. Using a WD green drive plugged into this http://eshop.macsales.com/item/NewerTech/FWU3ES2HDK/ with an eSATA connection took about 2.5 hours also, but that was bootable whereas the USB 3.0 connection is not.
Another point to consider is that USB 3.0 is ubiquitous on PC's now so there's lots of price competition for externals; not so much for eSATA externals.

Restore database in the past using only archivelog without full backup

Hi,
We have a 11g Oracle database up & running.
We don't have a full backup, but we have all archived log from the last 2 months.
Is it possible to "restore" the database using archived logs in a date in the past?
I mean for example 3 days ago?
Thanks in advance.

user8973191 wrote:
Oh, ok Vijayaraghavan K.
Thx for u help.
And about the users ?
i need to create the "same" user in another machine ?
For example:
In this machine i using the "system" user, where i have my tables.
Another machine, when i restore, my tables will go to the "system" user too? or i can choice? or i need to create one?A true backup is a copy of the data files at the file/block level. The restore is therefore a restore of the data files/blocks. Applying the redo (archive logs) is also done at the block level. None of that knows or cares (or needs to know or care) about logical objects (such as users, tablespaces, tables, rows, etc) within the database. so if you do a proper restore, you are restoring files to a consistent state and thus everything that was defined within those files will be there when restored.

Speeding up full backup of Replicate database ASE 15.5

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