RAID for control and red log files

I'm considering one of these two configurations
Option 1:
2 disks kept as separate disks (not using RAID), storing control01.ctl, redo log group 1 on first disk, and storing control02.ctl, and redo log group 2 on second disk.
Option 2:
2 disks configured as a RAID 1+0 volume (mirroring and striping) holding control01.ctl and a redo log group.
(Data files and third control file are elsewhere on the disk array.)
With option 1, I have the option of dropping a control file and dropping a redo log group if a disk fails and then continuing processing. But with option 2, if the RAID array fails, I'm sunk.
I'm thinking option 1 is better. What do others think? And why?
Thanks in advance,
Chris Curzon

Your Raid option has the following advantage: since it mirrors things, a person can [accidently or maliciously] simultaneously remove all control files and redo logs with a single remove command, effectively crashing the database into near unrecoverability.
Option 1 would have the disadvantage - for the person identified above - in that they would need two separate commands to ruin the system.
But, with simple mirroring, between the first and second command, the system would have halted and hopefully alerted someone that a weird but recoverable thing is happening. And the DBA would be able to get going simply by copying the mirrored file to the other, removed, location.
Message was edited by: Hans Forbrich
To make it clear - the advantage is NOT on the DBA's side ...

Similar Messages

  • Process Flow ignores name and location for Control- and Log-Files

    Hi!
    Our OWB Version is 10.1.0.3.0 - DB Version 9.2.0.7.0 - OWF Version 2.6.2
    Clients and server are running on Windows. Database contains target schemas as well as OWB Design and Runtime, plus OWF repositories. The source files to load reside on the same server as the database.
    I have for example a SQL*Loader Mapping MAP_TEXT which loads one flat file "text.dat" into a table stg_text.
    The mapping MAP_TEXT is well configured and runs perfect. i.e. Control file "text.ctl" is generated to location LOC_CTL, flat file "text.dat" read from another location LOC_DATA, bad file "text.bad" is written to LOC_BAD and the log file "text.log" is placed into LOC_LOG. All locations are registered in runtime repository.
    When I integrate this mapping into a WorkFlow Process PF_TEXT, then only LOC_DATA and LOC_BAD are used. After deploying PF_TEXT, I execute it and found out, that Control and Log file are placed into the directory <OWB_HOME>\owb\temp and got generic names <Mapping Name>.ctl and <Mapping Name>.log (in this case MAP_TEXT.ctl and MAP_TEXT.log).
    How can I influence OWB to execute the Process Flow using the locations configured for the mapping placed inside?
    Has anyone any helpfull idea?
    Thx,
    Johann.

    I didn't expect to be the only one to encounter this misbehaviour of OWB.
    Meanwhile I found out what the problem is and had to recognize that it is like it is!
    There is no solution for it till Paris Release.
    Bug Nr. 3099551 at Oracle MetaLink adresses this issue.
    Regards,
    Johann Lodina.

  • Best RAID configuration for storing Datafiles and Redo log files

    Database version:10gR2
    OS version: Solaris
    Whis is the best RAID level for storing Datafiles and Redo log files?

    Oracle recommends SAME - Stripe And Mirror Everything.
    In the RAC Starter Kit documentation, they specifically recommend not using RAID5 for things like voting disk and so on.
    SAN vendors otoh claims that their RAID5 implementations are as fast as RAID10. They do have these massive memory caches...
    But I would rather err on the safer side. I usually insist on RAID10 - and for those databases that I do not have a vested interest in (other than as a DBA), and owners, developers and management accept RAID5, I put the lead pipe away and do not insist on having it my way. :-)

  • Managing and configuring log files for Oracle 9ias

    Hi all,
    I'm wondering where I can find documentation on managing and configuring log files like:
    ORACLE_HOME/admin/ sid/*dump/* ORACLE_HOME/assistants/opca/install.log ORACLE_HOME/webcache/logs/*
    ORACLE_HOME/dcm/logs/*
    ORACLE_HOME/ldap/log/*
    ORACLE_HOME/opmn/logs/*
    ORACLE_HOME/sysman/log/*
    ORACLE_HOME/j2ee/ OC4J_instance/log/*/* ORACLE_HOME/config/schemaload.log ORACLE_HOME/config/useinfratool.log
    because I didn't find anything in document like:
    Oracle9 i Application Server
    Administrator�s Guide
    Release 2 (9.0.2)
    May 2002
    Part No. A92171-02
    So, if anyone has any idea...
    Thanks in advance

    Does anyone know how or if it is possible to send the stdout and/or stderr to the log4j type of logging? I already capture the stdout and stderr to the flat file. But I would like to timestamp every line to compare and diagnose problems with each application that encounters problems. Each web app is using log4j to their own application log4j log file. When they encounter errors or resource draining problems, I would like to see the container logs and see what was occuring inside the container at around that same time.
    Any ideas?

  • An error occurred while applying SQL script for the feature BackendStore. For details, see the log file

    Hello
    i got this error in step2
    Error: An error occurred while applying SQL script for the feature BackendStore. For details, see the log file 'C:\Users\administrator.RCC\AppData\Local\Temp\2\Create-BackendStore-lync.rcc.local_rtc-[2013_09_23][09_05_16].log'
    here is full summary
    > Bootstrap-CsComputer
    Logging status to: C:\Users\administrator.RCC\AppData\Local\Temp\2\BootstrapFull-[2013_09_23][12_17_37].html
    Checking prerequisites for bootstrapper...
    Checking prerequisite WMIEnabled...prerequisite satisfied.
    Checking prerequisite NoBootstrapperOnBranchOfficeAppliance...prerequisite satisfied.
    Checking prerequisite SupportedOS...prerequisite satisfied.
    Checking prerequisite NoOtherVersionInstalled...prerequisite satisfied.
    Host name: lync.rcc.local
    Disabling unused roles...
    Executing PowerShell command: Disable-CSComputer -Confirm:$false -Verbose -Report "C:\Users\administrator.RCC\AppData\Local\Temp\2\Disable-CSComputer-[2013_09_23][12_17_46].html"
    Checking prerequisites for roles...
    Checking prerequisite SupportedOS...prerequisite satisfied.
    Checking prerequisite SupportedOSNoDC...prerequisite satisfied.
    Checking prerequisite SupportedSqlRtcLocal...prerequisite satisfied.
    Checking prerequisite WMIEnabled...prerequisite satisfied.
    Checking prerequisite NoOtherVersionInstalled...prerequisite satisfied.
    Checking prerequisite PowerShell...prerequisite satisfied.
    Checking prerequisite WindowsIdentityFoundation...prerequisite satisfied.
    Checking prerequisite SupportedServerOS...prerequisite satisfied.
    Checking prerequisite NoUnsupportedWinFab...prerequisite satisfied.
    Checking prerequisite SupportedSqlLyncLocal...prerequisite satisfied.
    Checking prerequisite SupportedSqlRtc...prerequisite satisfied.
    Checking prerequisite IIS...prerequisite satisfied.
    Checking prerequisite IIS7Features...prerequisite satisfied.
    Checking prerequisite ASPNet...prerequisite satisfied.
    Checking prerequisite KB2646886Installed...prerequisite satisfied.
    Checking prerequisite BranchCacheBlock...prerequisite satisfied.
    Checking prerequisite WCF...prerequisite satisfied.
    Checking prerequisite WindowsMediaFoundation...prerequisite satisfied.
    Checking prerequisite SqlInstanceRtcLocal...prerequisite satisfied.
    Checking prerequisite VCredist...prerequisite satisfied.
    Checking prerequisite SqlNativeClient...prerequisite satisfied.
    Checking prerequisite SqlClrTypes...prerequisite satisfied.
    Checking prerequisite SqlSharedManagementObjects...prerequisite satisfied.
    Checking prerequisite UcmaRedist...prerequisite satisfied.
    Checking prerequisite WinFab...prerequisite satisfied.
    Checking prerequisite MicrosoftIdentityExtensions...prerequisite satisfied.
    Checking prerequisite SqlInstanceLyncLocal...prerequisite satisfied.
    Checking prerequisite SqlInstanceRtc...prerequisite satisfied.
    Checking prerequisite RewriteModule...prerequisite satisfied.
    Checking prerequisite SpeechPlatformRuntime...prerequisite satisfied.
    Checking prerequisite MSSpeech_TTS_ca-ES_Herena...prerequisite satisfied.
    Checking prerequisite MSSpeech_TTS_da-DK_Helle...prerequisite satisfied.
    Checking prerequisite MSSpeech_TTS_de-DE_Hedda...prerequisite satisfied.
    Checking prerequisite MSSpeech_TTS_en-AU_Hayley...prerequisite satisfied.
    Checking prerequisite MSSpeech_TTS_en-CA_Heather...prerequisite satisfied.
    Checking prerequisite MSSpeech_TTS_en-GB_Hazel...prerequisite satisfied.
    Checking prerequisite MSSpeech_TTS_en-IN_Heera...prerequisite satisfied.
    Checking prerequisite MSSpeech_TTS_en-US_Helen...prerequisite satisfied.
    Checking prerequisite MSSpeech_TTS_es-ES_Helena...prerequisite satisfied.
    Checking prerequisite MSSpeech_TTS_es-MX_Hilda...prerequisite satisfied.
    Checking prerequisite MSSpeech_TTS_fi-FI_Heidi...prerequisite satisfied.
    Checking prerequisite MSSpeech_TTS_fr-CA_Harmonie...prerequisite satisfied.
    Checking prerequisite MSSpeech_TTS_fr-FR_Hortense...prerequisite satisfied.
    Checking prerequisite MSSpeech_TTS_it-IT_Lucia...prerequisite satisfied.
    Checking prerequisite MSSpeech_TTS_ja-JP_Haruka...prerequisite satisfied.
    Checking prerequisite MSSpeech_TTS_ko-KR_Heami...prerequisite satisfied.
    Checking prerequisite MSSpeech_TTS_nb-NO_Hulda...prerequisite satisfied.
    Checking prerequisite MSSpeech_TTS_nl-NL_Hanna...prerequisite satisfied.
    Checking prerequisite MSSpeech_TTS_pl-PL_Paulina...prerequisite satisfied.
    Checking prerequisite MSSpeech_TTS_pt-BR_Heloisa...prerequisite satisfied.
    Checking prerequisite MSSpeech_TTS_pt-PT_Helia...prerequisite satisfied.
    Checking prerequisite MSSpeech_TTS_ru-RU_Elena...prerequisite satisfied.
    Checking prerequisite MSSpeech_TTS_sv-SE_Hedvig...prerequisite satisfied.
    Checking prerequisite MSSpeech_TTS_zh-CN_HuiHui...prerequisite satisfied.
    Checking prerequisite MSSpeech_TTS_zh-HK_HunYee...prerequisite satisfied.
    Checking prerequisite MSSpeech_TTS_zh-TW_HanHan...prerequisite satisfied.
    Checking prerequisite MSSpeech_SR_ca-ES_TELE...prerequisite satisfied.
    Checking prerequisite MSSpeech_SR_da-DK_TELE...prerequisite satisfied.
    Checking prerequisite MSSpeech_SR_de-DE_TELE...prerequisite satisfied.
    Checking prerequisite MSSpeech_SR_en-AU_TELE...prerequisite satisfied.
    Checking prerequisite MSSpeech_SR_en-CA_TELE...prerequisite satisfied.
    Checking prerequisite MSSpeech_SR_en-GB_TELE...prerequisite satisfied.
    Checking prerequisite MSSpeech_SR_en-IN_TELE...prerequisite satisfied.
    Checking prerequisite MSSpeech_SR_en-US_TELE...prerequisite satisfied.
    Checking prerequisite MSSpeech_SR_es-ES_TELE...prerequisite satisfied.
    Checking prerequisite MSSpeech_SR_es-MX_TELE...prerequisite satisfied.
    Checking prerequisite MSSpeech_SR_fi-FI_TELE...prerequisite satisfied.
    Checking prerequisite MSSpeech_SR_fr-CA_TELE...prerequisite satisfied.
    Checking prerequisite MSSpeech_SR_fr-FR_TELE...prerequisite satisfied.
    Checking prerequisite MSSpeech_SR_it-IT_TELE...prerequisite satisfied.
    Checking prerequisite MSSpeech_SR_ja-JP_TELE...prerequisite satisfied.
    Checking prerequisite MSSpeech_SR_ko-KR_TELE...prerequisite satisfied.
    Checking prerequisite MSSpeech_SR_nb-NO_TELE...prerequisite satisfied.
    Checking prerequisite MSSpeech_SR_nl-NL_TELE...prerequisite satisfied.
    Checking prerequisite MSSpeech_SR_pl-PL_TELE...prerequisite satisfied.
    Checking prerequisite MSSpeech_SR_pt-BR_TELE...prerequisite satisfied.
    Checking prerequisite MSSpeech_SR_pt-PT_TELE...prerequisite satisfied.
    Checking prerequisite MSSpeech_SR_ru-RU_TELE...prerequisite satisfied.
    Checking prerequisite MSSpeech_SR_sv-SE_TELE...prerequisite satisfied.
    Checking prerequisite MSSpeech_SR_zh-CN_TELE...prerequisite satisfied.
    Checking prerequisite MSSpeech_SR_zh-HK_TELE...prerequisite satisfied.
    Checking prerequisite MSSpeech_SR_zh-TW_TELE...prerequisite satisfied.
    Checking prerequisite UcmaWorkflowRuntime...prerequisite satisfied.
    Installing any collocated databases...
    Executing PowerShell command: Install-CSDatabase -Confirm:$false -Verbose -LocalDatabases -Report "C:\Users\administrator.RCC\AppData\Local\Temp\2\Install-CSDatabase-[2013_09_23][12_17_52].html"
    An error occurred while applying SQL script for the feature BackendStore. For details, see the log file 'C:\Users\administrator.RCC\AppData\Local\Temp\2\Create-BackendStore-lync.rcc.local_rtc-[2013_09_23][12_17_54].log'
    what should i do?
    Please help me

    Hi,
    The issue may be related to disk read and write cache. Here is a similar case for your reference:
    http://blog.kloud.com.au/2013/07/15/publish-lync-2013-with-2012-r2-preview-web-application-proxy/
    Note: Microsoft is providing this information as a convenience to you. The sites are not controlled by Microsoft. Microsoft cannot make any representations regarding the quality, safety, or suitability of any software or information found there. Please make
    sure that you completely understand the risk before retrieving any suggestions from the above link.
    Kent Huang
    TechNet Community Support

  • Log4j problem for backing up the log file

    This is my log4j.properties. it doesn't seem to back up the log file and create a new log file when it reaches to MAX size. can anybody look at it?
    Thanks..
    log4j.rootCategory=debug, stdout, R
    # Print only messages of priority WARN or higher for your category
    log4j.category.your.category.name=WARN
    # Specifically inherit the priority level
    #log4j.category.your.category.name=INHERITED
    #### First appender writes to console
    log4j.appender.stdout=org.apache.log4j.ConsoleAppender
    log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
    # Pattern to output the caller's file name and line number.
    log4j.appender.stdout.layout.ConversionPattern=[%d] [%c] %-5p - %m%n
    #### Second appender writes to a file
    log4j.appender.R=org.apache.log4j.RollingFileAppender
    log4j.appender.R.File=/opt/mc/logs/AMSWAS.log
    # Control the maximum log file size
    log4j.appender.R.MaxFileSize=200000KB
    log4j.appender.R.MaxBackupIndex=1
    log4j.appender.R.layout=org.apache.log4j.PatternLayout
    log4j.appender.R.layout.ConversionPattern=[%d] [%c] %-5p - %m%n

    Hello again Tom and thanks for your help!
    No, I didn't optimize any media though I've rendered proxies for all media. I have about 14TB of R3D footage on five external harddrives, it's a feature. The proxies and sound files which I copied to the library makes the library file that big. I can't consolidate all media, as far as I know, since I don't have a drive even close to the size of all the R3D footage.
    In terms of copying I have only tried the good old "copy/paste" method. I have never used any of those programs you mentioned. Can those programs be used to copy certain files or will they copy an entire drive?
    Will the automatic back-ups FCPX does every 15 minutes save my timelines if something would go wrong and the library file would dissappear? I don't fully understand how that back-up process works. I could always render new proxies, though it would take time, but re-editing all those timelines is a whole other thing. Important to note here is that I'm used to Premiere Pro and the "old" FCP which is why all of this is so confusing.
    Thank you again!

  • Where can I find Installer and uninstaller log files in JSE 6?

    Where can I find Installer and uninstaller log files in JSE 6?

    For the installer log file, search for Sun_Java_Studio_Enterprise_6_2004Q1_install, or some portion of that.
    To find Java ES component product log files, search on Sun_ONE.
    You can also search for the timestamp that is part of each log file name. It is of the format MMddhhmm (Month/day/hour/minute)
    Refer also to the Troubleshooting chapter of the Installation Guide for additional details on reports and log files used by Java SE

  • Looking for the Garbage Collection log files

    Hello,
    I am looking for the Garbage Collection log files which contain the GC events, like this:
    [GC 2095K->1709K(2160K), 0.0017628 secs]
    [Full GC 2161K->1018K(2276K), 0.0576353 secs]
    The server's GC is already configured accordingly:
    –verbose:gc
    I have examined the std_server<x>.out files at the work folder but can't see this info.
    My question is: Where would I find these files on the server?

    I can't find info in the format I know it not at dev_server* or std_server*.
    in std_server I see xml file like this:
    <gc type="scavenger" id="1" totalid="1" intervalms="0.000">
        <flipped objectcount="303111" bytes="24994248" />
        <tenured objectcount="0" bytes="0" />
        <refs_cleared soft="429" weak="4329" phantom="0" />
        <finalization objectsqueued="1711" />
        <scavenger tiltratio="50" />
        <nursery freebytes="497866672" totalbytes="524288000" percent="94" tenureage="10" />
        <tenured freebytes="1094921936" totalbytes="1098907648" percent="99" >
          <soa freebytes="1039977168" totalbytes="1043962880" percent="99" />
          <loa freebytes="54944768" totalbytes="54944768" percent="100" />
        </tenured>
        <time totalms="185.585" />
      </gc>
    I guess this is the info I need but it's not formatted in a way that your tool can read it and having a tool like this reading it is very helpful.
    Any ideas?

  • Changing names of datafiles, tempfiles and redo log files

    DB version:10g Release 2
    Can i use
    ALTER DATABASE RENAME FILE ...command to rename datafiles, tempfiles and redo log files?

    ScottsTiger wrote:
    DB version:10g Release 2
    Can i use
    ALTER DATABASE RENAME FILE ...command to rename datafiles, tempfiles and redo log files?Why not check the Fine Manual found at tahiti.oracle.com?
    Please note that when you use this command, you are doing nothing to the actual files on the OS. You are simply changing the db's knowledge of them, as stored in the control file.

  • It can't find URL when i use HLS for vod and the vod file name contain Chinese.

    It can't find URL when i use HLS for vod and the vod file name contain Chinese。eg： http://127.0.0.1:8134/hls-vod/你好.mp4.m3u8.
    How does it support Chinese path?

    To answer the post title FireFox save all downloads automatically in the download folder, which you can find in the Documents folder. If you want to choose where to save your downloads go to tools>options>check always ask me where to save files.
    Secondly, I am assuming you have IE 8 installed as this is the only version that supports this fix that is currently not in beta. Go to control panel>internet options>advanced tab and reset the settings at the bottom. This may or may not fix the problem but it is a good first step.

  • Correct cmdlet for moving my database/log files?

    Currently, my databases/logs reside on an external USB 1TB drive (D:\Mailbox\Mail400).  
    That being said, I need to move both database/logs to the C:\ drive
    Database - "C:\Program Files\Microsoft\Exchange Server\V15\Mailbox\Mail400"
    Logs-  "C:\Program Files\Microsoft\Exchange Server\V15\Mailbox\Mail400\Logs\". 
    Is this the correct cmdlet I would use to accomplish this move?
    Move-DatabasePath "Mail400" -EdbFilePath "C:\Program Files\Microsoft\Exchange Server\V15\Mailbox\Mail400\Mail400.edb" -LogFolderPath "C:\Program Files\Microsoft\Exchange Server\V15\Mailbox\Mail400\Logs\"
    I realize the best practice is to separate the database file and transaction logs onto separate disks but that isn't an option for us at this time.
    Ex2013sp1
    PennyM

    Hi PennyM,
    I have a test in my environment using the following cmdlet. I use Exchange server 2013.
    Move-DatabasePath -Identity 'Mailbox Database 1294421375' -EdbFilePath 'C:\Data\Mailbox Database 1294421375\test.edb' -LogFolderPath 'C:\Data\Mailbox Database 1294421375'
    There is no need to create these folders manually. When you run the above cmdlet, the folders you set will be created automatically.
    Besides, the move will take some time, it depends on the size of the database and transaction log files being moved.
    Hope it helps.
    Best regards,
    If you have feedback for TechNet Subscriber Support, contact
    [email protected]
    Amy Wang
    TechNet Community Support

  • Is it possible to export contacts  from Outlook 2011 for Mac and importing this file back into Mac Address Book.? please reply me its urgent

    Is it possible to export contacts  from Outlook 2011 for Mac and importing this file back into Mac Address Book.? please reply me its urgent

    Is it possible to export contacts  from Outlook 2011 for Mac and importing this file back into Mac Address Book.? please reply me its urgent

  • How to save for web AND overwrite original files with Action?

    Hello,
    I want to compress a batch of images with "save for web" using a Photoshop Action, and I also want to preserve my folder structure and overwrite source files. The structure is important because it's complex and needs to be structured this way.
    The Problem:
    When I choose "save for web", I must define a destination. What happens is all optimized files from within the structure are saved in a single location.
    Here's an example of the folder structure
    Folder A
         - Subfolder A1
         - Subfolder A2
    Folder B
         - Subfolder B1
         - Subfolder B2
              -Subfolder B2.2
    Folder C
         -Subfolder C1
    Summary
    Is it possible for me to use a Photoshop Action with "save for web", and overwrite my files without moving them from the structure?

    No need to re-invent the wheel.
    Just learn how to use the Image Processor, Image Processor Pro, or Dr. Brown's Services 1-2-3 in Photoshop and/or Bridge.

  • Japanese/C​hinese Font for PDF and MS Office files

    Hi,
    I have both the BB9860 and the Playbook, always uses the Playbook to download and read email attachments.
    However, I realise that for  PDF and MS Office files, japanese/Chinese fonts are not supported.
    Is there any way for me to download the add-ons and install into my playbook?
    Thanks.
    Regards, Song Por

    PDF can display chinese, MS Word cannot display chinese.

  • Getting error when updating the JavaScript API for Office and manifest schema files in your Visual Studio project from version 1.0 to 1.1

    Hi,
    I`m getting error message like "None of the apps in your project can be activated in the target. The manifest file of one or more apps contain API sets or Office applications that are not supported by
    the target Office client. To debug those apps, update manifest files to exclude any unsupported API sets or Office applications, and then start the project again. Alternatively, you can debug your apps by using Office 365 as a target." when when
    updating the JavaScript API for Office and manifest schema files in your Visual Studio project from version 1.0 to 1.1 in manifest file though i have added host elements.
    any help in this regard is highly appreciated
    Thanks,
    Santosh Sutar  

    Hi Satosh Sutar,
    Based on the description, you got the error message when you update the apps from version 1.0 to 1.1.
    From the error message, it seems the menifest include some settings no allowed in the new version. Would you mind sharing more detail about how you update the project?
    And here is an article about updating apps for Office and menifest schema files in the project for your reference:
    How to: Update the JavaScript API for Office and manifest schema files in your Visual Studio project from version 1.0 to 1.1
    Regards & Fei
    We are trying to better understand customer views on social support experience, so your participation in this interview project would be greatly appreciated if you have time. Thanks for helping make community forums a great place.
    Click
    HERE to participate the survey.

Maybe you are looking for