Ansicht
Dokumentation
00095 - On-line backup of SAP directories using BRMS
RFUMSV00 - Advance Return for Tax on Sales/Purchases BAL_S_LOG - Application Log: Log header dataThis documentation is copyright by SAP AG.
On-line backup of SAP directories using BRMS
Hello again,Snipped from the Software Knowledge Base (hope it's readable):
[...]
Current ISeries 400 systems using the 3590-B Ultra drive or Model E, may get
up to a 20% increase in performance over the 3590-B SCSI-2 (up to 60GB/hr or
17MB sustained compressed data rate*) if all of the following conditions
exist:
-- They are using OS/400 V4 hardware.
-- They are using IOP adapter FC 6534 or 6501 (not 2729).
-- The current OS/400-3590 SCSI-2 can achieve maximum sustained performance
today of 50GB/hr (typically with large files).*
o AS/400 or ISeries 400 systems using IOP 2729 will not see any performance
gains when using the 3590 B-UltraSCSI or E model drive. Performance with IOP
2729 will remain at up to 47GB/hr.*
o Future OS/400 system enhancements will provide the capability for the
3590-B Ultra and Model E drive to achieve data rates in excess of 60GB/hr.
Preliminary tests with forthcoming OS/400 enhancements have shown the 3590
performance at over 100GB per hour-- up to 30MB (see Note).
Note: Sustained data rate performance figures are estimates and are subject
to the user environment including processor performance, data compression
ratio, bus speeds, file types, application, and so on. User results may
vary. Product plans are estimates and are subject to change or withdrawal
without notice.
Summary
Today an UltraSCSI B or E model drive should get similar performance on the
current ISeries 400 systems. The user could get up to 17MB/second sustained
data rate (60GB/hour) on the 3590 Ultra-B or E models assuming that the
ISeries 400 system is at V4 hardware and the IOP adapter is a 6501 or 6534
and assuming large files with optimum blocking. With a user mix of data the
data rate is typically about 9MB/s. The bottleneck is not the 3590. As the
ISeries 400 group delivers future ISeries 400 system enhancements, the
performance of the 3590 could far exceed 17MB/second.* Users with additional
capacity needs may choose the 3590 Model E today for the double cartridge
capacity benefit and performance potential.
[...]
Bernd
----- Original Message -----
From: Glenn Ericson
To: Bernd Schäfers ; sap400Zm...
Cc: Russ.CookZg...
Sent: Monday, December 18, 2000 10:27 PM
Subject: Re: On-line backup of SAP directories using BRMS
The IOP I am suggesting is a 2729 PCI external Tape Controllere which does
not require V4R5. The other assumption is you have at least a model 7xx
system to drive the AS400 busses otherwise you can not reach the Tape drive
capabilities.
On a mix of sizes you suggest 60 GB/ hour is a reasonable transfer rate for
an E11 to achieve. perhaps a slight bit faster on the 8xx series.
Glenn
__________________________________
Glenn Ericson,
IBM Certified Specialist
Phoenix Consulting LLC
East Elmhurst, NY USA
Phone 718 898 9805 Fax 718 446 1150
mailto:Glenn-EricsonZa...
___________________________________
At 10:17 PM 12/18/2000 +0100, Bernd Schäfers wrote:
>Thanks for the info. Do you mean the 2749 IOP? We would have to upgrade to
>4.5 hardware for this...
>Sorry, I forgot to mention: Yes, my example below are mixed objects (many
>small, a few big, IFS, DLO).
>
>Bernd
>
>----- Original Message -----
>From: Glenn Ericson
>To: sap400Zm...
>Cc: Bernd Schäfers ; Russ.CookZg...
>Sent: Monday, December 18, 2000 9:54 PM
>Subject: Re: On-line backup of SAP directories using BRMS
>
>
>The 6501 IOP or 6534 are major limiting factors on your E-11 performance.
>With the newer IOP you should get from 60 - 70 GB/ hour. Now this will vary
>depending on
>- How the tapes were initialized
>- The size of the objects being backed up
>(many small take longer then few large)
>
>
>Glenn
>__________________________________
>Glenn Ericson,
>IBM Certified Specialist
>Phoenix Consulting LLC
>East Elmhurst, NY USA
>Phone 718 898 9805 Fax 718 446 1150
>mailto:Glenn-EricsonZa...
>___________________________________
>
>
>At 08:25 PM 12/18/2000 +0100, Bernd Schäfers wrote:
>>Hi,
>>On one system we had to exclude IFS directories according to note 214369.
>>I'll get back to you tomorrow re the BRMS control groups (sending this
from
>>home).
>>
>>Just for interest, what iSeries hardware (IOP) are you using on this
>>machine? We are achieving 3590E save rates of about 45 - 50GB/h on a 720
>>with 6501 IOP (offline backup, V4R4). According to IBM the 3590 Ultra-B
>>or E should achieve large file save rates of up to 60GB/h with 6501 or
6534
>>IOPs.
>>
>>Thanks,
>>Bernd
>>
>>----- Original Message -----
>>From: <Russ.CookZg...>
>>To: <sap400Zm...>
>>Sent: Monday, December 18, 2000 6:29 PM
>>Subject: Online backup of SAP directories using BRMS
>>
>>
>>>
>>>
>>>
>>>
>>>
>>> I have recently started running an "online" backup using BRMS. When
>>> the backup runs, several SAP background jobs cancel during the time
>>> period when BRMS is backing up the IFS directories. I believe this
>>> to be a result of locking errors on the directories where SAP creates
>>> job logs. I would be interested in comparing the BRMS control groups
>>> that other SAP users have implemented to perform an online backup of
>>> their SAP systems, especially the IFS entries. What SAP IFS
>>> directories do you include in your online BRMS backup and what save
>>> while active parameters do you use for the IFS link list? Any
>>> comments would be appreciated. FYI, we are backing up approximately
>>> a 200gb SAP database using a 3590 E11 drive. It is taking
>>> approximately 3 hours to backup the database plus several
>>> smaller libraries.
>>>
>>> Kind regards,
>>>
>>> Russ Cook
>>> Gardner Denver
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>> Russ Cook
>>> Senior SAP Basis Administrator
>>> Gardner Denver
>>>
>>
>>
>>
>>
>
>
Glenn
__________________________________
Glenn Ericson,
IBM Certified Specialist
Phoenix Consulting LLC
East Elmhurst, NY USA
Phone 718 898 9805 Fax 718 446 1150
mailto:Glenn-EricsonZa...
___________________________________
Durban Tours - Südafrika Safari
SUBST_MERGE_LIST - merge external lists to one complete list with #if... logic for R3up CL_GUI_FRONTEND_SERVICES - Frontend Services
This documentation is copyright by SAP AG.
Length: 8606 Date: 20231208 Time: 173543 sap01-206 ( 3 ms )
