LIVE CACHE MANAGEMENT

Hi,
Could you please send detailsl and material documents regarding LIVE CACHE MANAGEMENT .
I am in very urgent need of material.
Thanks and regards,
shyla kumar
Message was edited by:
shyla kumar

Hello Shyla ,
If you are looking for details and material documents regarding SAP liveCache
Database ::
-> For SAP liveCache documentation in English < See the SAP note 767598 >:
http://help.sap.com/saphelp_nw04/helpdata/en/f2/0271f49770f0498d32844fc0283645/frameset.htm
-> Please review the SAP notes:
          820824     FAQ: MaxDB/liveCache technology
          767598 Available documentation
-> Please review the documentation at
     service.sap.com/scm -> mySAP SCM Technology
     service.sap.com/liveCache
it is available for SAP customers.
-> Please review additional information at
https://www.sdn.sap.com/irj/sdn/wiki?path=/display/maxdb/main&
-> MaxDB Support Guide -> liveCache
Thank you and best regards, Natalia Khlopina

Similar Messages

Data movement from R/3 DB to APO DB and to Live cache

Dear APO Experts,
I have few questions on live cache and how it works, I understand that Live cache is memory resident database. below are my questions.
1) What sought of data move from R/3 DB to APO DB and then to Live cache DB
2) When data moves from APO DB to Live cache, till how much duration that data stays in live cache
3) And how does data gets pulled in to live cache from APO DB
4) Why do we require live cache logs while data never gets commited to hard disk
5) Do we ever add a datafile to Live cache DB
any info that you provide on this will be really helpfull to me
Thanks,
Chetan

Hello Chetan,
As you know, itu2019s MAXDB/liveCache forum.
What is the version of your system?
The is documentation available at:
   SAP liveCache technology
< Please review document u201CWhat is SAP liveCache technology?u201D >
Sap documents at service.sap.com/scm -> Technology:
u201CliveCache overviewu201D and u201CIntegration overviewu201D
For SAP liveCache documentation also see the SAP note 767598.
Go to SAP link Best Practices for Solution Management: mySAP SCM at   SAP liveCache technology ...
And Review the document u201CManage APO Core Interface in SAP APO (3.x) / mySAP SCM (4.x/ 5.0)u201D
1. As you saw in the reference documents the data transferred from the connected R/3 system to APO.
And the transactional data could be uploaded to the liveCache, if you downloaded them
to the APO database cluster tables first. This procedure steps are running during the
system upgrade < for example, from SCM 5.0 to SCM 7.0 ) u2013 report /SAPAPO/OM_LC_UPGRADE_70 steps. Or you want to migrate the
liveCache to another operating system or convert your system to Unicode,
and therefore you want to back up the liveCache data first so that you
can reload it into the liveCache afterwards - SAP Note No. 632357.
2. Could you collaborate more on this sentence. Could you give examples?
3. u201CAnd how does data gets pulled in to live cache from APO DBu201D
    The data are not pulled from the APO DB to liveCache.
     When you changed the APO data on the system the LCA procedures have been called from ABAP. The objects stored in the class containers in liveCache can be accessed and manipulated only via LCA routines. The registration of the LCA routines is done automatically when the liveCache is started by the LC10. The LCA procedures in the LiveCache are written in C++
and shipped to the customers as binary LCA libraries(LCA build) together with the LiveCache.
< See more details in SAP Note No. 824489 or 1278897 as of SCM 7.0 >
4. See the SAP notes:
               869267     FAQ: SAP MaxDB LOG area
             1377148     FAQ: SAP MaxDB backup/recovery
5. You could run the quicksizer & estimate how much data you are planning to have in liveCache.
     Also the amount of data could be increased by the creation of the new data in APO by users
     Or another reason u2026
     In general you will add the datavolume to solve or prevent the DB_FULL issue,
     See u201C17. What do I do if the data area is full? u201C in SAP note 846890.
Thank you and best regards, Natalia Khlopina

Live cache backup

Hi Experts,
I am beginner to SCM and Live cache technology.
I have sucessfully installed SCM 5.0 and Live cache 7.6.29 on two different HP-Ux 11.23 servers.
My first requirent is to take live cache backup. But there is no tape drive connect to any of the server,
local file system assigned as backup space, accordingly I have successfully taken online backup of SCM database by modifying entries like backup_dev_type to tape in init<SID>.sap.
Know I am facing a challenge to take live cache backup on local file system , infact dont know how to take online live cache backup.
Another question is database manager gui is needed in unix environment, if yes please let me know the procedure how to configure this as In transaction lc10 upon double clicking database manager gui system generating error.
Please help to solve the above two problems.
Thanks & Regards,
Maqsood Ahmed

Hi Ahmed (no own SDN account? ).
I'd like to make a few remarks on this:
1. Backup to local filesystem w/o moving it to another location afterwards is next to useless. What happens when (when not if!), the local disk crashes? What backup can you use then?
2. You can perform liveCache Backups from DB13C/DBACockpit after you've integrated the liveCache instance (DB59).
3. If you like to administer the liveCache via DBMGUI - just install DBMGUI on your Windows Workstation and connect remotely to the liveCache. Actually this is the way how it was thought up.
For detailed information how to work with liveCache I propose you check:
The documentation [Backup/Recovery SAP Library - Database Administration in CCMS: SAP liveCache Technology|http://help.sap.com/saphelp_nw70/helpdata/EN/e9/dc1c3e46903b2ee10000000a114084/content.htm]
The SDN Content on liveCache [https://www.sdn.sap.com/irj/sdn/livecache]
The SCM Technology pages in the SAP Service Marketplace [https://service.sap.com/scm] -> SAP SCM Technology
Good luck,
Lars

Live cache upgrade on Windows 2003, IA64 clustered environment

Hi,
We are currently upgrading the Live Cache from 7.6.03,    BUILD 008-123-159-187 to 7.7.03   BUILD 023-123-174-368.
Note # 508979 is being referred to. The upgrade has completed successfuly on one Node A but is interruopted on Node B. The error log is as follows
INSTALLER_INFO: Version = 7.7.03 Build 023-123-174-368
INSTALLER_INFO: Changelist = 174368
INSTALLER_INFO: MakeId = 285415
INSTALLER_INFO: Type = kit
SYS_INFO: Host name = FMSAP457
SYS_INFO: System = Windows
SYS_INFO: Architecture = IA64
SYS_INFO: Version = NT 5.2
SYS_INFO: Subversion = Service Pack 2
CALL: SDBUPD -INSTANCE -profile APO LiveCache
STDOUT:
     SAP liveCache INSTANCE UPDATE
STDOUT:      *****************************
STDOUT: starting installation We, Oct 08, 2008 at 01:26:46
STDOUT: operating system: Windows IA64 NT 5.2 Service Pack 2
STDOUT: callers working directory: Z:/SCM_51upgradeCD/SCM5.1_SPS6/lca600011_livecache-win-64bit-i386-7_7_03_23
STDOUT: installer directory: Z:/SCM_51upgradeCD/SCM5.1_SPS6/lca600011_livecache-win-64bit-i386-7_7_03_23
MSG: InstallRegistry: space check ok: 16843616 kb on W: (17719292 kb total) available
MSG: install registry successfully locked
MSG: read 16 PACKAGES
MSG: net registry size = 133192 bytes
WRN: InstallRegistry::reserveSpace(): file >= 1024 kb
STDOUT: archive directory: Z:/SCM_51upgradeCD/SCM5.1_SPS6/lca600011_livecache-win-64bit-i386-7_7_03_23
STDOUT:
MSG: debug package SDBBAS.SDB is valid
MSG: debug package SDBKRN.SDB is valid
MSG: debug package SDBUTL.SDB is valid
MSG: no installation data to migrate
STDOUT: beginning to check sap db instances
STDOUT: existing instance:
STDOUT: 0: LCA   "O:/sapdb/LCA/db" 7.6.3.8
STDOUT: 1: none
STDOUT: please enter instance id:
STDIN: 0
STDOUT: please enter database manager operators name:
STDIN: control
STDOUT: please enter database manager operators password: STDOUT:
STDIN:
STDOUT: resume broken instance check
x_server is running
got following x_server data:
version = W64/INTEL 7.6.3    Build 008-123-159-187
dbmsrv uses db_online
dbmsrv uses db_admin
STDOUT: finding instance type...
instance type is LVC
getting catalog encoding...
catalog encoding is UNICODE
STDOUT: finding starting release...
kernel executable is O:\sapdb\LCA\db/pgm/kernel.exe
kernel version by GetBuildString 7.6.3    Build 008-123-159-187
starting release is 7.6.3    Build 008-123-159-187
STDOUT: finding apo starting release...
sapapo lib is O:\sapdb\LCA\db/sap/sapapo.dll
apo version by GetBuildInfo 5.0.0.13
apo starting release is 5.0.0.13
STDOUT: finding migration strategy...
migration is using external livecache consistency
from LVC 7.6.3    Build 008-123-159-187
and APO 5.0.0.13
to   LVC 7.7.03
and APO 6.0.0.011
STDOUT: looking for running instances...
no instances found
db_enum
OK
MSG: writing 16 packages
MSG: net install registry size = 133192 bytes
MSG: wrote install registry (156751 bytes)
STDERR: MaxDB instance "LCA" not ready to update
STDERR: looking for running instances...
no instances found
db_enum
OK
STDERR: SAP liveCache instance update exited abnormally at We, Oct 08, 2008 at 01:28:48
MSG: install registry successfully unlocked
Regards
Abraham

As a SAP customer: please open a support message for this!
regards,
Lars

Live Cache in SCM 5.0

Hello,
We installed new SCM 5.0 on Windows Server 2003 64 bit with Oracle 10.2.0.4.0. We want to configure Live Cache from the scratch, so please let us know the procedure.
We do have SPC150: Managing liveCache guide but, we are getting "xserver is inactive" error. Please let us know the solution for this error.
Help us to configure Live cache.
Thanks
Rhishabh
Symtrax Software

Hello Rhishabh,
You will find useful information on configuring LC in the following links;
https://websmp208.sap-ag.de/~form/sapnet?_SHORTKEY=01100035870000659894&_OBJECT=011000358700005431372005E&
follow the steps in the chapter
"Setting Up the Connection to the liveCache Instance" according to the liveCache installation guide. Also the link below has more information;
Release Overview SAP LC/LCAPPS 5.0 [original link is broken]

Sales ORDER- live cache problem- HIgh

Hello Experts,
Please advise me how to fix the error message which occurs while creating sakes order.
Error message reads:
" ATP check in System PA1CLNT410 is not possible since
livecache is not active".
Kindly advise

In SAP Best Practice, I found this note which I thought would be helpful to you.
Check Planning Version 000
In your SAP SCM system, use the following path:
SAP Menu --> Advanced Planning and Optimization --> Master Data --> Planning Version Management --> Model and Version Management
Make sure that the planning version 000 u2013 Active Version is available.
If this planning version is not available, this means that the LiveCache has not been initialized. Proceed with the LiveCache initialization before you start with the installation of any SAP Best Practices scenario.
*Live Cache*
LiveCache version:     KERNEL     7.5.0   Build 015-122-076-685
DBM server version:      DBMServer 7.5.0   Build 015-122-076-685
Operating system:     SunOS
So what you have to do is that check with your basis people to instal LiveCache
thanks
G. Lakshmipathi

Live Cache Locks

Dear Friends,
What does Live Cache Lock mean? How do we use this and what is it for? How to manage in APO? Can anyone let me know answers pls. Thanks in advance.
Regards
Bala

Hi Bala,
When you create, change and delete orders, rows in relational tables are changed or deleted in the liveCache. The corresponding records stay locked until the end of the transaction. The maximum number of locks on relational records is determined with parameter MAXLOCKS.
If a transaction requires more than 10% of the lock list for locks onto a table, all the multiple row locks are converted into a single table lock (this is called an 'escalation'). If several transactions escalate at the same time, wait situations occur since only one transaction can set the table lock.
There is no 'management' of locks required in APO. If you are seeing many lock escalations in liveCache, an increase in the MAXLOCKS parameter might be necessary.
Thanks,
Ashwath

Backing up Live Cache 7.7

Hi Gurus
I am new to APO and Live Cache, just installed both, LC10 is completely configured.
I want to know how do I backup my Live Cache ?
Thanks
JS

Hello JS,
-> Are you SAP customer?
     <As you know for "Best Practices for Solution Management: mySAP SCM" (SMP login required) >
-> At http://maxdb.sap.com/doc/7_7/default.htm < MAXDB library >
         Database Administration -> Backing Up Databases
-> At http://maxdb.sap.com/doc/7_7/default.htm < MAXDB library >
    < Tutorials -> Database Manager CLI Tutorial -> Backup >
-> See the document at
        https://www.sdn.sap.com/irj/scn/wiki?path=/display/maxdb/main
             - > MaxDB HowTo > HowTo - MaxDB backup with dbmcli
Thank you and best regards, Natalia Khlopina

Live cache backup question

Hello Experts,
Iam new to Livecache and AP0 and was trying to understand the process of backups reason i need to perform complete SCM 7.0 systemcoopy . In past i have done system copies and well aware of the procedures .
Here it goes Presently we are on SCM 7.0
Question :--> I see our Livecache is installed on one machine and AP0 on another machine. Iam not aware how Livecache
                       was integrated with AP0.
                       Iam trying to understand how to take backup of livecache and then restore the same in Target.
In LC10
LCA --> ProblemAnalysis --> Logs --> DBA History
i can see that the live cache backups are in getting successfully everyday.
I see that Backup Label as DAT_000000<xxx> and Backup Template as bac214<xxx>.
Where can i see this Backup Template defined ( the path ) .
Can someone provide an insight regarding the live cache backups.
Checked SAP Note 457425 .
--> After system copy how would i integrate Livecache and AP0 .
Thanks in Advance.
Medha

Hello Medha,
1.
a)
Please review all recommended steps in the SAP note:
886103     System Landscape Copy for SAP SCM
when you are planning to do the SCM system copy.
For SAP liveCache documentation please see the SAP note 767598.
b)
SAP link:
SAP liveCache technology
-> Best Practices for Solution Management: mySAP SCM
review:
"Checklist for Recovery of SAP APO liveCache >= 7.4"
< It will be helpful to practice the steps of the document on the test liveCache instance first >
2.
Sessions: http://maxdb.sap.com/training/
=>
Session 2: Basic Administration with Database Studio
Session 3: CCMS Integration into the SAP System
Session 11: SAP MaxDB Backup and Recovery
Those sessions will help you. If you still have some questions after that => update the thread.
4.
Took classes for the MAXDB database administration or get the SAP consulting support.
Regards, Natalia Khlopina

Log Queue Overflows in SCM+Live Cache system

Hello Friends,
Log Queue Overflows showing RED alert in SCM Live cache, Please help me How to solve this issue.
Regards,
Balaram

User Basis wrote:
Dears,
>
> In my system some problems are occurring with log queues.
> The following message is presented in my system:
> Log queue overflows: 70641, configured log queue pages: 2000 for each of 4 log queues
>
Ok, so what is the problem with that?
You use the liveCache quite heavily (e.g. make lots of commits/changes) and the storage where you put your log-volume to is not quick enough to save the data.
Either you fix the storage speed or you accept that your users might have to wait a bit longer for their application to save the data.
User Basis wrote:
> I think it is occurring because we are managing the Log with "Log automatic overwrite". This configuration is being used because we don´t have a lot of disk space to manage it as well.
> Al jey.
These two things have no connection.
A log queue overflow simply means, that sessions have to wait until the log queue is saved to disk before they can put new entries to the log queue.
The log mode overwrite means: you don't care about data security and the ability to recover the liveCache from a backup.
It's a setting used for throw-away database instances where it doesn't matter to loose data.
It means that the database simply overwrites log entries that have not been backed up, when the log area gets filled.
regards,
Lars

What is live-cache?

Hi Experts,
Can any one explain what is live-cache and eash access in supply chain management and what is customization in SCM?
Cheers,
Aanand.

In Supply Chain Management, large volumes of data must be permanently available and changeable. For this reason, an addition has been made to the SAP DB OLTP relational database system to enable actual data structures and data flows (such as networks and relationships) to be mapped more easily and effectively. The product is called liveCache. The liveCache is object-oriented, and in contrast to SAP DB OLTP, stores its data in the main memory of the database system.
The SAP liveCache technology significantly increases the speed of the algorithmically complex, data- and runtime-intensive functions of various SAP applications, especially within SAP Supply Chain Management.
It combines the advantages of main memory-based data retention with a complete operating concept, including backup & recovery. The application functions are provided by database procedures (liveCache Applications) having an extremely fast access to all application data which can completely cached in main-memory and are organized in relational but mainly object oriented manner.
The SAP liveCache technology can be characterized by a hybrid main-memory database with intensive usage of database procedure.
For more information, please access the following links:
SAP liveCache technology
http://maxdb.sap.com/doc/7_7/f3/3edeb38ab14f9798d2a800b2c439c9/content.htm
Have a nice day!
Will
SCM Moderator

MAXLOCKS alert generation - SAP Live Cache

Hello Guru's,
We have a requirement for setting alerting for parameter MAXLOCKS on live cache server when it reaches to a threshold value, but we couldn't find any monitoring set in RZ20.
So we have got an idea to use Count(*) on LOCKSTATISTICS and calculate a threshold. But not sure how to do it through Shell Script for MAx DB? Please suggest if any other options as well.
Thanks and Regards,
Sri's

Hello Sri's,
1.
Please review the notes:
65946          Lock escalations
1243937     FAQ: MaxDB SQL locks
As you know, the system table LOCKLISTSTATISTICS displays the statistics of the
lock management since the last database start. This system table is insufficient for the analysis of locking conflicts.
2.
Review the sapact script attach to the SAP Note No. 974758 as HINT to your question on collecting the output
of the statement :
SELECT * FROM SYSDBA.LOCKLISTSTATISTICS     and
SELECT * FROM SYSDBA.LOCKSTATISTICS
Periodically during the job/application run in question.
Also use the DB analyzer to find the bottleneck in liveCache.
3.
Create the SAP message and get SAP support.
It will be helpful to know what is the version of your system, SAP basis SP, the liveCache version and the reason of your project.
Did you get the DB analyzer warnings with lock escalation?
Regards, Natalia Khlopina

Error during Live Cache Server Installation on SCM 4.1 system

Hi All,
I have an SCM 4.1 ABAP system running on MSSQL2005 and Win2003 server.I would like to install Live Cache Server on the same Server.Livecache client was installed as part of SCM 4.1 installation.
I have installed MAXDB software and now when im trying to install Live Cache Server Instance i get the below error
Im performing the installation with user root and it is an Administrator.
WARNING 2011-12-09 11:01:25
Execution of the command "change 'user' '/install'" finished with return code 1. Output: Install mode does not apply to a Terminal server configured for remote administration.
Installation start: Friday, 09 December 2011, 11:01:23; installation directory: G:\SCM_4.1_Media\Media_Live_Cache\New_Media\51031447_2\CD_SAP_SCM_4.1_liveCache_64bit\SAPINST\NT\AMD64; product to be installed: SAP SCM 4.1> Additional Services> Install a liveCache Server instance
Transaction begin ********************************************************
WARNING 2011-12-09 11:02:33
Error 3 (The system cannot find the path specified.
) in execution of a 'CreateProcess' function, line (265), with parameter (G:\SCM_4.1_Media\Media_Live_Cache\New_Media\51031447_2\CD_SAP_SCM_4.1_liveCache_64bit\NT\AMD64\SDBUPD.EXE -l).
Transaction end **********************************************************
WARNING 2011-12-09 11:02:34
The step Fill_sapdb_db_instance_context with step key LIVECACHESERVER|ind|ind|ind|ind|ind|0|LC_SERVER_INSTALL|ind|ind|ind|ind|ind|0|Fill_sapdb_db_instance_context was executed with status ERROR.
Has anyone seen this error before ? Any pointers would be helpful.
Regards,
Ershad Ahmed.

Subprocess starts at 20111209154957
Execute Command : C:\Program Files\sdb\programs\pgm\dbmcli.exe -n XXXXXXXXX db_enum
Execute Session Command : exit
> Subprocess stops at 20111209154957
OK
> Subprocess starts at 20111209155027
Execute Command : C:\Program Files\sdb\programs\pgm\dbmcli.exe -n XXXXXXXXX db_enum
Execute Session Command : exit
> Subprocess stops at 20111209155027
OK
> Subprocess starts at 20111209155221
Execute Command : C:\Program Files\sdb\programs\pgm\dbmcli.exe -n XXXXXXXXX db_enum
Execute Session Command : exit
> Subprocess stops at 20111209155221
OK
> Subprocess starts at 20111209155323
Execute Command : C:\Program Files\sdb\programs\pgm\dbmcli.exe -n XXXXXXXXX inst_enum
Execute Session Command : exit
> Subprocess stops at 20111209155324
OK
7.5.00.31    f:\sapdb\liv\db
7.6.06.10    f\sapdb\sdb\7606
7.6.06.10    C:\Program Files\sdb\7606
> Subprocess starts at 20111209155324
Execute Command : C:\Program Files\sdb\programs\pgm\dbmcli.exe -n XXXXXXXXX inst_enum
Execute Session Command : exit
> Subprocess stops at 20111209155324
OK
7.5.00.31    f:\sapdb\liv\db
7.6.06.10    f\sapdb\sdb\7606
7.6.06.10    C:\Program Files\sdb\7606
> Subprocess starts at 20111209161349
Execute Command : C:\Program Files\sdb\programs\pgm\dbmcli.exe -n XXXXXXXXX inst_enum
Execute Session Command : exit
> Subprocess stops at 20111209161349
OK
7.5.00.31    f:\sapdb\liv\db
7.6.06.10    f\sapdb\sdb\7606
7.6.06.10    C:\Program Files\sdb\7606
Regards,
Ershad Ahmed.

Live Cache Failed (DBM error)

Hi,
I am getting following error while starting live cache(LC10)
"Error DBMCLI_COMMAND_EXECUTE_ERROR when starting liveCache LC1 on server system"
Server: system
Users: SAPUSER
Logical Command: DBMRFC
Parameter: exec_lcinit restart
Name and Server     : LC1 - system
DBMRFC Function     : DBM_EXECUTE
Command             : exec_lcinit restart
Error               : DBM Error
Return Code         :     -24964
Error Message       : ERR_EXECUTE: error in program execution#
0,sap\lcinit LC1 restart -uDBM , -uDBA , -uSQL ,
liveCache LC1 (restart)
The liveCache state is OFFLINE
DBMServer 7.6.00   Build 029-123-130-265
starting LC1 into ONLINE
ERROR : restart not possible [please check knldiag!!]
ERROR : liveCache LC1 not started (see "d:\sapdb\data\wrk\LC1\lcinit.log")
In Transaction DB59 i tried connection test "Connect. test with "native SQL" ( LCA ) unsuccesful"
how to restart Live Cache again? what will be the problem?
regards
Thennarasu

Hello,
what's wrong with the hint you already got?
> ERROR : restart not possible [please check knldiag!!]
Check the knldiag and then we might be able to do something about this issue.
regards,
Lars

Bridge cache management still weak in CS4 (trial version)

I've been running the trial version of Photoshop 11 (CS4) and Bridge 3.0.0.464 for a little over 24 hours.
Though Bridge 3.x (CS4) runs
much faster than 2.x (CS3) on my Mac, cache management is already a big disappointment (again). I find myself having to purge the cache
for practically each and every folder, as at least one of the four info lines under each thumbnail fails to populate, usually the first line, "Date Created". On a few ".pct" images (Apple PICT), the Dimensions (in pixels) line refuses to populate even after repeated purging of the cache for the folder.
What remains to be seen is whether ACR 5.2 is enough incentive to upgrade or not. Bridge 3.x falls a little short, the flashy effects in Photoshop are not enough by themselves.

Ann,
>I have absolutely NO desire to inflict unnecessary pain on myself intentionally.
That's most commendable. :) Trust me, pain and grief is exactly what you would have.
Here's another way I can confirm the bug:
First I manually delete the cache folders, then do a global purge on startup (by holding the option key and checking the box in the dialog box). The "Date Created" info line is blank (data missing).
Then I Build and Export Cache through the Tools menu. That fixes the missing data in the info line.
Presumably, I now have a healthy cache.
If I again purge the cache globally, through preferences or at startup, the "Date Created" info line goes blank instantly under ALL my thumbnails on all volumes connected at the time.
Then I again Build and Export Cache through the Tools menu. That fixes the missing data in the info line under all thumbnails.
To me, that is unmistakably a bug.

LIVE CACHE MANAGEMENT

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