Kernel 2.6.30 and ext4 file systems - nodelalloc still needed?

Is it true that one does not need the nodelalloc switch in the /etc/fstab to prevent data loss due to an ungraceful reboot/shutdown of an ext4 partition under the new 3.6.30 kernel?

You shouldn't need nodelalloc, yes.
ext4 2.6.30 has code in it that hacks around the most common problems with apps that write data assuming the filesystem exhibits ext3-like behavior. But it's up to you -- if you didn't notice any performance loss, why not keep it?

Similar Messages

Difference between ASM Disk Group, ADVM Volume and ACFS File system

Q1. What is the difference between an ASM Disk Group and an ADVM Volume ?
To my mind, an ASM Disk Group is effectively a logical volume for Database files ( including FRA files ).
11gR2 seems to have introduced the concepts of ADVM volumes and ACFS File Systems.
An 11gR2 ASM Disk Group can contain :
ASM Disks
ADVM volumes
ACFS file systems
Q2. ADVM volumes appear to be dynamic volumes.
However is this therefore not effectively layering a logical volume ( the ADVM volume ) beneath an ASM Disk Group ( conceptually a logical volume as well ) ?
Worse still if you have left ASM Disk Group Redundancy to the hardware RAID / SAN level ( as Oracle recommend ), you could effectively have 3 layers of logical disk ? ( ASM on top of ADVM on top of RAID/SAN ) ?
Q3. if it is 2 layers of logical disk ( i.e. ASM on top of ADVM ), what makes this better than 2 layers using a 3rd party volume manager ( eg ASM on top of 3rd party LVM ) - something Oracle encourages against ?
Q4. ACFS File systems, seem to be clustered file systems for non database files including ORACLE_HOMEs, application exe's etc ( but NOT GRID_HOME, OS root, OCR's or Voting disks )
Can you create / modify ACFS file systems using ASM.
The oracle toplogy diagram for ASM in the 11gR2 ASM Admin guide, shows ACFS as part of ASM. I am not sure from this if ACFS is part of ASM or ASM sits on top of ACFS ?
Q5. Connected to Q4. there seems to be a number of different ways, ACFS file systems can be created ? Which of the below are valid methods ?
through ASM ?
through native OS file system creation ?
through OEM ?
through acfsutil ?
my head is exploding
Any help and clarification greatly appreciated
Jim

Q1 - ADVM volume is a type of special file created in the ASM DG. Once created, it creates a block device on the OS itself that can be used just like any other block device. http://docs.oracle.com/cd/E16655_01/server.121/e17612/asmfilesystem.htm#OSTMG30000
Q2 - the asm disk group is a disk group, not really a logical volume. It combines attributes of both when used for database purposes, as the database and certain other applications know how to talk "ASM" protocol. However, you won't find any general purpose applications that can do so. In addition, some customers prefer to deal directly with file systems and volume devices, which ADVM is made to do. In your way of thinking, you could have 3 layers of logical disk, but each of them provides different attributes and characteristics. This is not a bad thing though, as each has a slightly different focus - os file system\device, database specific, and storage centric.
Q3 - ADVM is specifically developed to extend the characteristics of ASM for use by general OS applications. It understands the database performance characteristics and is tuned to work well in that situation. Because it is developed in house, it takes advantage of the ASM design model. Additionally, rather than having to contact multiple vendors for support, your support is limited to calling Oracle, a one-stop shop.
Q4 - You can create and modify ACFS file systems using command line tools and ASMCA. Creating and modifying logical volumes happens through SQL(ASM), asmcmd, and ASMCA. EM can also be used for both items. ACFS sits on top of ADVM, which is a file in an ASM disk group. ACFS is aware of the characteristics of ASM\ADVM volumes, and tunes it's IO to make best use of those characteristics.
Q5 - several ways:
1) Connect to ASM with SQL, use 'alter diskgroup add volume' as Mihael points out. This creates an ADVM volume. Then, format the volume using 'mkfs' (*nix) or acfsformat (windows).
2) Use ASMCA - A gui to create a volume and format a file system. Probably the easiest if your head is exploding.
3) Use 'asmcmd' to create a volume, and 'mkfs' to format the ACFS file system.
Here is information on ASMCA, with examples:
http://docs.oracle.com/cd/E16655_01/server.121/e17612/asmca_acfs.htm#OSTMG94348
Information on command line tools, with examples:
Basic Steps to Manage Oracle ACFS Systems

New zone and inherited file system mount point error

Hi - would anyone be able to help with the following error please. I've tried to create a new zone that has the following inherited file system:
inherit-pkg-dir:
dir: /usr/local/var/lib/sudo
But when I try to install it fails with:
root@tdukunxtest03:~ 532$ zoneadm -z tdukwbprepz01 install
A ZFS file system has been created for this zone.
Preparing to install zone <tdukwbprepz01>.
ERROR: cannot create zone <tdukwbprepz01> inherited file system mount point </export/zones/tdukwbprepz01/root/usr/local/var/lib>
ERROR: cannot setup zone <tdukwbprepz01> inherited and configured file systems
ERROR: cannot setup zone <tdukwbprepz01> file systems inherited and configured from the global zone
ERROR: cannot create zone boot environment <tdukwbprepz01>
I've added this because unknown to me when I installed sudo from sunfreeware in the global it requires access to /usr/local/var/lib/sudo - sudo itself installs in /usr/local. And when I try to run any sudo commands in the new zone it gave this:
sudo ls
Password:
sudo: Can't open /usr/local/var/lib/sudo/tdgrunj/8: Read-only file system
Thanks - Julian.

Think I've just found the answer to my problem, I'd already inherited /usr ..... and as sudo from freeware installs in /usr/local I guess this is never going to work. I can only think to try the sudo version of the Solaris companion DVD or whatever it's called.

When trying to install Aid Virtual Instruments I get a warning no mountable file systems. I need help fixing the problem.

When trying to install Pro Tools 10.3.3 Aid Virtual Instruments I get a warning no mountable file systems. I need help fixing the problem.

Thanks Linc for responding to my post. I searched a little further and found I was missing a file. Once I downloaded the fix, I was able to install the software from the original download.

Hello, I have the Firefox browser and McAffee Security - do I still need to install Norton 360 on my computer? Thanks

Hello, I have the Firefox browser and McAffee Security - do I still need to install Norton 360 on my computer? Thanks

No you don't.

How to make OS-X recognize ext4 file systems

Hi:
Is there a way to have OS-X recognize and access (read/write) a disk that is formatted with ext4 (journaling) file system? Thanks.

John Lockwood wrote:
Paragon extFS looks by far the easiest solution however you have to buy it. If your budget does not stretch to that then you will need to get your hands dirty. The following two packages together will make a free solution.
http://osxfuse.github.com/
https://github.com/gerard/ext4fuse
Thanks for the info, but the exercise to make is too technical fo me. Maybe
Paragon extFS could help, but my project goes beyond that. I want to read/write files from an ext4 formatted drive, but I also want to boot the Linux OS that resides in the drive. I haven't found a single solution for this yet, except using virtualization.
wp

APEX 2.1 and server file system interaction methods

Hello experts
I am building a web application using APEX 2.1 that would be used by a few hundred users as a secure and auditable portal to a word document file library.
The main use case is that an authenticated user will find links to documents he/she has been granted access of various levels (read only or read/write).
All the files are stored on the server file system.
I have a couple of questions:
1.some file" when placed in an HTML region source does not work. Is this normal ?
2.Will I have to import the entire file library (very large in size and number of files) into APEX so I can access them from APEX or can I simply use the simple anchor HTML tag above.
Many thanks. Zemus.
Edited by: zemus on Jun 4, 2009 1:25 PM
Edited by: zemus on Jun 4, 2009 1:26 PM
Edited by: zemus on Jun 4, 2009 1:27 PM

I think I answered your email. Also, you can have a look at these threads:
Re: How to display bfile in Apex report
Re: Linking to display an external file
Denes Kubicek
http://deneskubicek.blogspot.com/
http://www.opal-consulting.de/training
http://apex.oracle.com/pls/otn/f?p=31517:1
-------------------------------------------------------------------

Missing Recovery Partition and Unrecognized File Systems

So, a long time ago I accidentally deleted my recovery partition and have recently been trying to fix it so that I can upgrade my OS to Mavericks. After browsing around here I found the Recovery Partition Creator 3.7 and used it to create a new recovery partition. Using the diskutil list command everything seemed to be fine and it looked like the partition was successfully created so I tried reinstalling OS X Lion by holding command R at startup. Doing so brought up the internet recovery menu and I selected reinstall Lion which was still unsuccessful because "a recovery partition could not be created". So, I decided to check in disk utility to see what might be wrong and I used the disk utility debug command in order to access disk utility's debug menu and show all the hidden partitions. Now, looking at these partitions I see two hidden partitions: disk0s1 which is an EFI partition, and disk0s3 which is the Apple Boot Partition that was created by Recovery Partition Creator 3.7. After verifying the partitions, disk utility is telling me that both my EFI and apple boot partitions have unrecognized file systems, my Macintosh HD partition is fine. At this point I do not know what to do.
Below are photos of the diskutil list and of what disk utility is showing me for the two hidden partitions.
For reference I am running OSX Lion 10.7.5 (11G63) on a early 2011 13 inch Macbook Pro (Base Model).
Bootrom version: MBP81.0047.B27
SMC Version: 1.68f99
Thank you all in advance for your help, feel free to ask me any questions.

Just an update, I went ahead and installed Lion again over the existing TM restored installation using the Lion Update file and at least File Vault is working. Interestingly, I still do not have a Recover partition so obviously something new for Apple Support to learn.

Database shut down and file systems are still busy

We have been copying our production DB over to a reporting DB for the last 3 years. The process we use on the reporting database is: shutdown the DB ABORT, restart it, then shutdown immediate. Then we umount the file systems and copy the production over using a Flex Clone on the NETAPP, remount the file systems and start the database back up. We used to shut down the listener which does not share the oracle binaries on the unix system but lately have left the listener up because other DB's use it. Every so often after shutting down the report database in prep for the copy, the file system that contains the binaries is busy and we can't unmount the ORACLE binaries.
So my question is how does the listener know if the database is up or down? Is it reading something on the volumes we're trying to unmount to see if the database is up? We have users that schedule jobs in odd hours and was wondering if them hitting the listener and even though the database is down it's making the file systems busy?
Any help is appreciated.

Mi**** wrote:
So my question is how does the listener know if the database is up or down? If/when the DB responds, then the listener knows it is up;
otherwise listener reports error to client
Is it reading something on the volumes we're trying to unmount to see if the database is up? We have users that schedule jobs in odd hours and was wondering if them hitting the listener and even though the database is down it's making the file systems busy?
Listener is NEVER involved with any ongoing packet exchange between client & the DB.
Listener takes original connection request & if the DB is up passes the request to the DB.
After this initial handoff, the listener has NO more involvement with packet exchange between DB & client

File system and LR2 file system view summary

Hello,
Is there a way when navigating a directory via the Folders panel to click on the folder and get summary information about the contents of the folder both from a file system perspective as well as a Lightroom perspective?
file system perspective: number of physical files supported by LR2 in the folder
LR2 perspective: the number of files that have virtual copies, how many total virtual copies total, how many photos are in stacks, how many stacks, etc.
Thanks,
Matt
-Windows XP x64 SP2
-AMD Athlon 64 X2 Dual Core 6400+
-4.00 GB of RAM
-Lightroom Version 2.0 64-bit 481478 Camera Raw 4.5
-Two Silicon Graphics GDM-5011P Monitors
-Huey Pro with version 1.5 of their calibration/profiling software
-Nvidia Evga 8800 GT graphics card with 512 MB of Video RAM
-Monitor One: The 'normal' Lightroom window in either the Library or Develop Module
-Monitor Two: 'Loupe-Normal' in 1:1 view

               No, you can't specify an entire filesystem as something to cluster. I
          suggest using NFS or some shared filesystem and then running a cluster
          off of that.
                                   - Mike
          Michael Lenart wrote:
          >
          > yes
          > "Mike Benham" <[email protected]> wrote in message
          > news:[email protected]..
          > >
          > >
          > >
          > > I'm not sure if I understand what you're asking. How can you cluster a
          > > filesystem? It seems like you want to mount some filesystem via NFS and
          > > then access that from each instance of a server? Are you asking if
          > > Weblogic can perform the duty of NFS?
          > >
          > > - Mike
          > >
          > >
          > > Michael Lenart wrote:
          > > >
          > > > Can the file system be clustered?? For example, in the cluster level
          > > > property file can I have a file system with the name of XDrive and then
          > use
          > > > that file system in my components??

Please Advise on SAP and DB2 file system during installation

Dear Experts
SAP ERP 6.0 EHP5 ( AS ABAP and AS JAVA(EP))
DB2
RHEL 6
i have a requirment to install solution manager,development and production server, at present client is allocated below hardware for 3 servers and one MSA Storage
Landscape: Two system landscape
DEV Server: 2*300GB HDD 2cpu/32gb ram
PRD server: 2*300GB HDD 2cpu/32gb ram
solution manger: 2*300GB HDD 1cpu/16gb ram
MSA Storage HP P2000 G3 MSA 12*300Gb HDD
1 TAPE DEVICE
these three server should to connected to storage
Its my first time to work on this kind of landscape with SAN
Request to please provide me filesytems and mountpoint with size. However i am going through standardinst document & trying to understand...
Regards
Raju

RAJU83 wrote:
> Request to please provide me filesytems and mountpoint with size. However i am going through standardinst document & trying to understand...
Better you continue with that and plan and document the file system and size strategy.
'SAP Sizing' is very important, utilize it - service.sap.com/sizing
After you understand the guides' advice and explore standard sizing, then share your queries with us.
This concept is very detailed one and really the 'subjective' one - depends case to case - customer to customer - ultimately the SIZING will help you - It can't be explained clearly in a discussion thread 'initially'
Thanks

Flash Player 9, Director MX, LocalConnection and the file system sandbox

I have a Director MX asset to which I have no source-code
access. Previously I could use LocalConnection in a Flash Player 8
projector to interact with the Director app, local to the
file-system. I seem unable to do the same thing with a Flash Player
9 projector. The director asset looks for and loads the relevant
Flash projector and unloads itself when it is no longer present,
and this functionality continues without a problem. However, when I
use the LocalConnection.send method, the Flash player does not
receive the expected responses.
I know that this is a rather general and abstract question:
put simply, does anyone know whether Flash Player 9 and Director MX
can't talk to each other using LocalConnection?
ps to pre-empt over-enthusiastic respondees, yes I am aware
of other technologies such as AIR, Zinc etc, and no they're not a
viable option for my particular project.

Hi,
the following sourcecode is compiled with Flexbuilder 2 and
runs in flashplayer 9.0.115 as expected.
How do you trigger the effect?
best regards,
kcell
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="
http://www.adobe.com/2006/mxml"
layout="absolute">
<mx:Button label="run"
click="{wr1.play();}"></mx:Button>
<mx:Label id="l1" top="20" text="this is label"
visible="false"/>
<mx:Image id="img1" source="@Embed('k.jpg')" top="40"
visible="false"/>
<mx:WipeRight id="wr1" target="{img1}" duration="1000"
effectStart="img1.visible=true" effectEnd="{wr2.play();}"/>
<mx:WipeRight id="wr2" target="{l1}" duration="1000"
effectStart="l1.visible=true"/>
</mx:Application>

1.1.4 and new file system

Does 1.1.4 have a new file system?
I upgraded to 1.1.4 using iTunes. Now I am unable to load any application packages that are normally displayed by the installer.
When I tried to view what is in the iphone I see that the file system layout is different - there is only root.
Did I upgrade wrongly? or did I do it on a wrong day .
THanks

Let me explain in case you didn't already know: the iPhone currently has two restrictions:
1. it can only be used with one carrier (e.g. AT&T in the US)
2. You cannot download any applications on to it.
Installer is a 3rd party app which allows you to download applications, but if you use it, you void your iPhone warranty.
In updating to 1.1.4, you have probably wiped installer of the iPhone, and are back to a standard iPhone (hopefully) - any 3rd party apps that were on the phone will have been wiped as well.
If you want more apps, the I would wait until late June, when version 2.0 will be released, which will allow you to download Apple-approved apps, without voiding your warranty.
Hope this helps.

Accessing FAT and NTFS file systems in same machine

hi
i m new in solaris
is it possible to access my windows file system in solaris.
file systems are FAT and NTFS.
regards

You should be able to mount FAT filesystems as type pcfs.
Theres no native support for NTFS, but I seem to remember a project working on that.
So google for solaris NTFS will probably find it..

ASM and ext. file system

Hi,
Can I use ASM for one ERP database instance and other for normal .ext file system?
if yes, what impact would be on system?
Thanks

Can I use ASM for one ERP database instance and other for normal .ext file system?Please elaborate more on what you are trying to achieve.
What is the application release? Database version? OS?
RAC: Frequently Asked Questions [ID 220970.1] -- What storage option should I use for Oracle RAC on Linux? ASM / OCFS / Raw Devices / Block Devices / Ext3 ?
RAC Assurance Support Team: RAC Starter Kit and Best Practices (Linux) [ID 811306.1]
Thanks,
Hussein

Kernel 2.6.30 and ext4 file systems - nodelalloc still needed?

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