BTRFS and Arch; integration points

i've been on a btrfs rampage the last couple days, and i want to open discussion for ideas on how btrfs will fit into Arch. what useful Arch specific tools can we build to take advantage of the new FS and it's capabilities? we can build them now so the tools stabilize while btrfs gains more credibility.
a common one is rollback support. i have a (volatile) version available here:
http://aur.archlinux.org/packages.php?ID=33376
however, it's not the setup i'd like to see by default (i.e. setup by AIF [interactive] installer). i envision a default btrfs setup/structure something like:
├── home
│ ├── __active
│ ├── __rollback
│ ├── snap_11-11-1111_11-11-11
│ └── snap_22-22-2222_22-22-22
└── root
├── __active
├── __rollback
├── snap_11-11-1111_11-11-11
└── snap_22-22-2222_22-22-22
this is the "subroot" structure; underneath your / [root]. "." is the original default subvolume. /root/__active is your "primary" (default) system. /root/ __rollback is a volatile copy of a snap_XX (you boot into this [__rollback] when you "rollback"). since snap_XX gets copied to __rollback... if you decide you want to ditch your changes to __active (since it's messed up anyways), you just replace __active with __rollback (snapshot of a snapshot), reboot, and voilà! your system's __active subvolume works again, and none of your snapshots got messed with.
same logic for /home/__active and /home/__rollback (and snap_XX) except you wouldn't have to reboot... maybe we can create login manager ([xkg]dm) hooks to remount your home folder with a "rollback" on the next logout or something? who knows.
i guess i'm just calling out for general ideas about btrfs, useful integrations with Arch, how others are using it already, and maybe some feature ideas for the mkinitcpio-btrfs hook (or some input from admin about steps to inclusion into main).
"i did do the nasty in the pasty" -Fry

ngoonee wrote:
fsckd wrote:I hope this won't spoil my plans to have multiple distros use one filesystem.
You could just not use btrfs?
From what I've been reading on the MLs though, I don't think it'll be a big problem, but you'd need all the distros to be using the same conceptual layout.
I have a better idea though, just dump the other distros
Heh, was tongue in cheek. Actually, my other install is for emergency purposes and t'would not be sane to share a fs.

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Hi Experts,
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Shiva Patil

hi anish,
plz note tht their is no direct integration of QM nd PS .
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Btrfs and Arch

Hi,
As of kernel 2.6.29 there's going to be support for btrfs. From what I hear, its already usable, albeit at one's own risk . Anybody experimenting here (the forum search turned out essentially nothing)?

Okay, very rigid tests (with standard mkfs/mount options and dropping caches in between tests):
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edit2: And it's 14% for the second one. Delayed allocation in this case, I presume.
Last edited by lucke (2009-02-13 18:14:43)

What are the integration points with sd and qm

hi,
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in r/3.
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balaji.t
09990019711

Dear balaji
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Integration points between SD and PP

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SD and PP Link
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What are the integration points with sd and pm

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balaji.t
09990019711

Balji,
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Facebook and Twitter integration not working

I'm have trouble using Facebook and Twitter integration in Mountain Lion. When I click 'Click to Tweet', or 'Click to Post', nothing happens; I don't get the notecard looking thig, and it's like I never clicked the button. Same thing with sharing from an app, except for Twitter. I receive notifications from both just fine, but I'm unable to post. I can tweet something from the sharing menu (link to a webpage with Safari, for example), but I cannot send a tweet using the 'Click to Tweet' button in Notification Center. Also, I cannot post to Facebook by neither sharing nor the 'Click to Post' button. So far I have tried sharing with Safari, Finder, and Preview, all with the same results. (Facebook sharing with iPhoto does work, but I don't believe that is integrated with OS X.)
I have also tried the following, with no luck:
Checked my settings on the Facebook and Twitter sites.
Removed my acounts and re-added them.
Obviously, my internet connection is working.
Added my Facebook account to the 'Guest User' account, and another administrator account.
Had a friend add his Facebook account to his own (limited) account on my computer--he could not post to Facebook either.
I believe the last two things I tried indicate that this is a system-wide problem. A couple more things to note: 1) there is no kind of error message; it just sits there, like nothing happend, no 'spinning wheel' or anything. 2) It DID work before. Twitter worked when I first upgraded to Mountain Lion, and Facebook worked when I installed the 10.8.2 update. I don't use either often enough to know when exactly they stopped.
Here is a video illistrating my problem.
It's been driving myself crazy with this over the past few days, and can't seem to find an answer anywhere. I also seem to be the only one with this problem.

First, I would eject whatever it is that you downloaded. Go to Finder and eject it that way or depending how you have your system set up, do the two finger tap and Eject it. Download the link above. Once it downloads, double click it to install it. It should work. If it doesn't you need to use your Disk Utility to check for errors. Click your Finder again and then Applications. Scroll down to Utilities and then Disk Utility. Click on your hard drive and you will get a menu of items on the right side. Towards the bottom, you will see a button to Verify Disk Permissions. Click that and let it run. It may take a few minutes to finish. Once it's finished there may be a list of things wrong with your system. Click the Repair Permissions and let the computer do it's thing. Use Disk Utility at least once a month to make sure everything is in order on your system. If this doesn't fix it, I don't have any other suggestions. I'd hate to say do a fresh install but that might be the next step if this doesn't work.
Something else to consider is that is if you use Time Machine and the system did work at one point, you could go back to the last known good point and reinstall that back-up. You would lose anything you have saved since that point (obviously). If you take steps to back up your information, that should not be an issue. (For me), Time Machine works as advertised. If you are not backing system up regularly, shame on you. You need to start ASAP backing up. It's an easy process and it's times like you are having now, that make the small preventive maintenance, worth extra time and effort.
Good luck.

Dual booting Windows 8 and Arch Linux with UEFI

Hi all!
I'm trying to install Arch Linux on my computer where I already have Windows 8, and I'm getting a little stuck when it comes to the partitioning.
Following the beginner's guide and the method here: https://wiki.archlinux.org/index.php/Un … n_in_Linux for setting up the partitions properly, regarding UEFI. My problem is that when using cgdisk to set up a new EFI system partition (ef00), I get an error message when trying to write the partition table (just saying that something went wrong). I figure the problem is that I already have a partition like this (correct me if I'm wrong), but it really looks like it succeded (see info below). So my question is: How do I preceed to keep my Windows 8 installation happy, but installing Arch? Do I remove the old EFI system partition and create a new one, or is there some method that allows me to edit the already existing one, to allow me to dual boot Windows 8 and Arch?
My partition table now looks like this:
Part. # Size Partition Type Partition Name
1007KB free space
1 500MB Windows RE Basic data partition
2 300MB EFI System EFI system partition (this one was already present on my system)
3 128MB Microsoft reserved Microsoft reserved partition
4 63.5GB Microsoft basic data Basic data partition
8 512MB EFI System EFI System partition (this is the one I tried to create when I got the error message)
5 29.5GB Linux filesystem Arch (this is where I was going to put my Arch installation)
6 22GB Windows RE Basic data partition
7 1024MB Windows RE Basic data partition
615KB free space
Just for the record; I only created partition #8 and #5.
Any help is appreciated! And sorry for beeing a total noob, but I really suck at this.

sudo make sandwich wrote:If it is possible to share ESP between OSes, how do I do this (would it be sufficent to follow this section: https://wiki.archlinux.org/index.php/Beginners'_Guide#For_UEFI_motherboards)?
There's really very little to do to share an ESP between OSes. Most OS installers will auto-detect the ESP and use it. Problem solved. For Arch it may be a bit more effort just because Arch uses a more hands-on installation process, but I've only done a couple of Arch installations, and the last one was several months ago, so I don't recall the details clearly enough to comment.
And how big will the partition need to be? The beginner's guide says 512MB or higher.
I don't know what was in the mind of the author, but my guess is that's because that's roughly the cutoff point where mkdosfs starts creating FAT32 by default rather than FAT16. The ESP is officially supposed to be FAT32, not FAT16, although FAT16 usually works OK. It's also possible to create FAT32 on smaller partitions by using an explicit option to mkdosfs ("-F 32").
The optimal size of the ESP depends on the files stored on it. If you don't store your Linux kernels, something as small as 100MiB is usually adequate; but a few Linux kernels and their initrd files can consume twice that amount. My own recommendation is for the ESP to be 200-500MiB.
The only error message I got from cgdisk is "Problem saving data! Your partition table may be damaged!", however booting Windows again works fine. Parted did not complain about antything.
Use the "verify" function in cgdisk. That will reveal any problems with the data structures. If a verify turns up OK, then that means that cgdisk ran into some sort of disk problem. Running gdisk rather than cgdisk and using the gdisk "w" option (without making any changes) may produce a more helpful error message.

Dual booting win 7 and arch: cannot install grub to partition

I have read the arch wiki page on dual booting and several other sources on line, but I am still struggling to get this to work.
I am trying to dual boot arch and windows 7 on my lenovo ideapad s205. the machine comes with windows 7 pre-installed.
I shrank the win 7 partition and added an extended partition with 3 logical partions for /boot, swap, and /.
I am able to install and run arch by installing grub to the mbr. when I do this, though, I cannot boot windows. (the windows section of grub menu.lst is uncommented and points toward hda0,0. I have tried hda 0,1 as well).
I have also tried to use the windows boot loader to load arch, as described in the arch wiki page on dual booting. The problem here is that, taking this approach, I should install grub to my /boot partition, but when I try to do this, the installer only allows me to install grub to sda or sdb (the usb stick).
I have read that grub should be able to boot linux from a logical partition. Is this so?
Is there something wrong with the arch installer that it is not giving me the option of installing to a partition rather than the mbr, or is this a problem with my partition scheme, or something else?
I am tempted to remove lenovo's recovery system, but on the other hand, I have already needed to use it several times while monkeying around with installing arch.
Thanks for any help.
UPDATE:
I now have the laptop dual-booting win 7 and arch. My solution ( adapted from here: http://helms-deep.cable.nu/~rwh/blog/?p=177) was to:
1. installed arch on the partitions I had created for it, but skipped the "install bootloader" stage.
2. in win 7, I downloaded and installed EasyBCD and made an entry for arch in it. I checked the option to "Use EasyBCD's copy of GRUB"
3. When I restarted, I got a grub error because the entry in grub's menu.lst was pointing at the wrong partitions for the kernel and root.
4. So I went back into the arch live disk, mounted the boot partition and edited menu.lst.
Now when I start the laptop, the windows boot loader starts and I can choose between win 7 and arch. when I select arch, grub4dos starts and gives me the option to start arch. this is not particularly elegant (nor is it fast), so I think this solution is less than ideal, but it does work.
I'd be interestd in any thoughts about what went wrong and what a better solution would be.
thanks.
Last edited by ratchet (2011-10-10 19:09:16)

ratchet wrote:II am able to install and run arch by installing grub to the mbr. when I do this, though, I cannot boot windows. (the windows section of grub menu.lst is uncommented and points toward hda0,0. I have tried hda 0,1 as well).
Is this a typo in your post or how it was in menu.lst? Surely it should be hd0,0 and not hda0,0? The entry I have in my menu.lst is as follows:
# (2) Windows
title Windows
rootnoverify (hd0,0)
makeactive
chainloader +1
What was yours?
Last edited by JHeaton (2011-10-10 20:18:22)

[Solved] Windows 7 and Arch Dual boot- unable to boot into Windows7

Had to reformat computer and reinstall windows and Arch on two separate hard drives (Dual boot) .
Windows 7 was the first install on SDA: (/dev/sda1 - system reserved 100mb, /dev/sda2 - 20gb)
Arch on SDB: (/dev/sdb1- boot 94mb, /dev/sdb2- swap, /dev/sdb3 - root, /dev/sdb4 - /home)
Installed grub2 on /dev/sda. now grub bootloader loads Arch fine. Also shows Windows 7 (on /dev/sda1).
But when chosen Windows 7, it does not load and loops back again to boot loader screen.
In BIOS i have set disk drive SDB as first boot option.
If i choose SDA as first boot option in BIOS, same scenario is repeated.
I have gone through mostly all the pages related to the topic but i can not co-relate the solution
to my exact situation due to limited knowledge.
Can somebody pls help me as to how to edit grub.cfg so as to point it to load windows 7?
the entry related to windows 7 reads as follows:-
quote
### BEGIN /etc/grub.d/30_os-prober ###
menuentry 'Windows 7 (loader) (on /dev/sda1)' --class windows --class os $menue$
insmod part_msdos
insmod ntfs
set root='hd0,msdos1'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos1 --hint$
else
search --no-floppy --fs-uuid --set=root F010D97410D941F0
fi
chainloader +1
unquote
for Arch set root value is hd1,msdos1 and working fine.
Thanks and regards.
Last edited by commsanjay (2012-10-14 08:08:54)

This is exactly why I have chosen to use windows MBR and syslinux
https://wiki.archlinux.org/index.php/Wi … oot-loader
Last edited by ackt1c (2012-10-14 02:32:55)

OS X and Arch dual-boot on MBP - bootloader error

I have a Macbook Pro 9,2, and I dual-boot OS X and Arch. My main Arch partition is encrypted with an LVM on LUKS setup, and my main OS X partition is encrypted with Firevault 2. I run the vanilla Arch kernel, and I use xfce as my DE. I use refind as my boot manager, and grub as the bootloader for the Arch partition. This setup has worked flawlessly for several months. I update my Arch system once per week, and last Sunday was a large update since xfce got a large overhaul (in terms of program and config files). However, since the update I cannot boot into OS X (I am posting this here instead of an OS X forum since no change occurred to the OS X system so the problem must be with a change to my Arch system).
When I attempt to boot into OS X, I am asked for my password to decrypt the partition, but then I get the following error message:
efiboot loaded from device: Acpi (PNP0A03,0)/Pci(1F12)/SATA(0,0)/HD(Part3.Sig698A
48BA-88E6-471C-9359-AD63C7EEBE74
boot file path: \System\Library\CoreServices\boot.efi
............Read error 0x6
Error loading kernel cache (0x6)
Error: Aborted returned from boot.efi
*Hit any key to continue*
Starting boot.efi
Using load options ''
efiboot loaded from device: Acpi (PNP0A03,0)/Pci(1F12)/SATA(0,0)/HD(Part3.Sig698A
48BA-88E6-471C-9359-AD63C7EEBE74
boot file path: \com.apple.recovery.boot\boot.efi
.............Read error 0x6
Error loading kernel cache (0x6)
Error: Aborted returned from boot.efi
*Hit any key to continue*
When I hit a key, I get taken back to the refind menu. If I choose OS X again, I get the same error. This cycle can be repeated ad nauseam. Booting into my Arch partition, on the other hand, works just fine, with one hiccup. While usability does not seem to be reduced, after I input my password to decrypt the Arch partition, and before I see the tty1 login, I (since Sunday) occasionally get the following error message that I have never had before:
19.636262] [drm:crypt_set_fifo_underrun_reporting] *ERROR* uncleared pch fifo underrun on pch transcoder
19.636264] [drm:crypt_serr_int_handler] *ERROR* PCH transcoder A FIFO underrun
19.331860] ata1.00: exception Emask 0x50 SAct 0x1100 SErr 0x280900 action 0x6 frozen
19.331927] ata1.00: irq_stat 0x08000000, interface fatal error
19.331974] ata1: SError: {UnrecovData HostInt 10B8B BadCRC }
19.332821] ata1.00: failed command: READ FPDMA QUEUED
19.332866] ata1.00: cmd 60/00:40:70:c1:01/01:00:24:00:00/40 tag 8 ncq 131072 in
19.332866] res 40/00:60:b0:55:2a/00:00:24:00:00/40 Emask 0x50 (ATA bus error)
19.332176] ata1.00: status: { DRDY }
The "READ FPDMA QUEUED" line and those below it repeat a few time with different numbers following "cmd" and "res," but then after a few moments the messages clear off the screen and I arrive at my tty1 login screen and from there everything in Arch (including my now-upgraded DE) works normally. This error does not occur during all boots, but I cannot discern any pattern behind when I see it and when I do not. The OS X error and failure to boot occurs every time I try to boot into OS X.
I have learned a lot as an Arch user, but this problem is beyond me. Google has not been particularly friendly, understandably so given the peculiarity of the problem and my setup. I have not yet tried undoing the update I did on Sunday because (a) it would be a pain since there were >30 packages that were upgraded, and (b) I have no evidence that the upgrade was actually causative of this issue, though I may eventually attempt the downgrade out of desperation if I cannot find a solution. Note that the update I keep referencing did not including a kernel update.
I appreciate any advice or insight that you can offer.

I don't have much in the way of a solution for your problem, but to start with, what were the > 30 packages? In particular, was grub/refind updated (or anything else that would likely touch your efi partition? I know from my own messing with refind, that you can potentially 'damage' your partition layout with certain commands which maybe causing osx not to boot...
Then again, the errors may have nothing to do with your arch installation and maybe indicative of a different problem all together. Normal procedure is at this point is to backup your complete disk (clone/mirror it, read up on how to do that especially with regards to the encryption systems used), and try to diagnose for any problems the mbp maybe having.
You could use an apple rescue cd (that may no longer be available with newer mbp , I have no idea..) or maybe use a different harddisk and install osx there and see if you can get everything running 'normally' thus ruling out any funky errors with the hw. check apple's recovery options if need be.
I guess you'll just have to fiddle about a bit and try to more closely determine what the actual problem is. and again, backup your stuff!

Win 7 and Arch dual boot [SOLVED]

There are other help threads about this, but I didn't want to hijack somebody's elses thread. Sorry for the long post, I just want to provide as much detail as possible:
I am trying to use Grub (not Grub2) to dual boot between Arch Linux and Windows 7. I had this working before using Windows XP, but when I reinstalled Windows 7 over Windows XP, Grub would no longer boot Windows.
1. If I manually choose the hd containing Windows 7 to load first in my BIOS, Windows 7 boots no problem. If I manually choose the hd with Grub and Arch to load first in my BIOS, I get a Grub menu, which boots Arch, but not Windows 7. Ideally, I think, I would like to have the internal drive with Arch ranked first, then the internal drive with Windows second in my BIOS. At least, that's how I had been doing things before blowing away XP and installing Windows 7.
2. Here is the (abbreviated) output of sudo fdisk -l
Device Boot Start End Blocks Id System
/dev/sdb1 * 2048 206847 102400 7 HPFS/NTFS
/dev/sdb2 206848 169934847 84864000 7 HPFS/NTFS
/dev/sdb3 169935570 1953520064 891792247+ 83 Linux
Device Boot Start End Blocks Id System
/dev/sda1 * 63 1028159 514048+ 83 Linux
/dev/sda2 1028160 3084479 1028160 82 Linux swap / Solaris
/dev/sda3 3084480 44050229 20482875 83 Linux
/dev/sda4 44050230 488392064 222170917+ 83 Linux
3. From that, I can tell that Arch is installed on sda: sda1 = boot partition; sda2 = swap; sda3 = root partition; sda4 = home partition.
Windows 7 is installed on sdb: sdb1 = system reserved partition (created automatically by Windows 7 during install); sdb2 = Windows; sdb3 = separate ext3 partition
4. I am comfortable editing Grub menus. This is an excerpt of mine:
# (0) Arch Linux
title Arch Linux
root (hd0,0)
kernel /vmlinuz26 root=/dev/disk/by-uuid/blah-blah-blah ro
initrd /kernel26.img
# (2) Windows
title Windows 7
rootnoverify (hd1,0)
savedefault
makeactive
map (hd1) (hd0)
map (hd0) (hd1)
chainloader +1
5. The error I get is "error 15: file not found" If I change the line reading "rootnoverify" to "root", I get the same error plus the bit about "filesystem unknown, partition type 0x7" so I think I'm pointing at the right partition/drive. That is, I know that partition type 0x7 is an NTFS filesystem/Windows.
6. I messed around with the Grub entry for Windows. I modified the root line to read "rootnoverify (hd1,1)", but things still did not work. I wasn't sure if I needed to bypass the "system reserved" partition created by Windows, or not. I also flip-flopped the two map lines, so they read:
map (hd0) (hd1)
map (hd1) (hd0)
That did not work either. I tried these combinations together, but Windows still would not boot. Always the same error message: "filesystem unknown, partition type 0x7"
7. I think I have a mapping problem given that Arch boots fine and Windows boots fine from the BIOS. However, I'm not sure how to fix this. Any help would be appreciated.
Thanks,
Culley
Edit:
Okay, so I fixed things. I just removed a bunch of stuff from my Grub entry. Even though Windows is not on the same drive as Grub, it does not need the map sections like I thought. I also removed the savedefault and makeactive entries, not sure if that made a difference or not. My new grub entry looks like this
# (2) Windows
title Windows 7
rootnoverify (hd1,0)
chainloader +1
Last edited by CulleyS (2010-09-24 15:45:12)

This is exactly why I have chosen to use windows MBR and syslinux
https://wiki.archlinux.org/index.php/Wi … oot-loader
Last edited by ackt1c (2012-10-14 02:32:55)

SAP R/3 and BW integration Landscape

Hello Gurus,
Could you'll suggest a site or link where I could get a better insight into the SAP R/3 and BW integration Landscape, i.e. how Data gets transferred from SAP R/3 to BW.
Thanks,
Sebastian

Hi,
YOU can check the following for BW extraction
http://help.sap.com/bp_biv235/BI_EN/html/bw.htm
business content
https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/com.sap.km.cm.docs/library/biw/g-i/how%20to%20co-pa%20extraction%203.0x
https://websmp203.sap-ag.de/co
http://help.sap.com/saphelp_nw04/helpdata/en/37/5fb13cd0500255e10000000a114084/frameset.htm
PLease also have a look at BW data modelling guide,
https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/docs/library/uuid/5586d290-0201-0010-b19e-a8b8b91207b8
http://www.thespot4sap.com/Articles/SAP_BW_Metadata_Modelling.asp
Please reward points.

Understanding ERM and CUP integration in AC 10.0

Iu2019m reaching out in hopes to get a better understanding of how AC 10.0 is meant to handle the ERM and CUP integration (Iu2019m still stuck on the old names :). Any feedback would be greatly appreciated.
Currently, we have a requirement to setup the GRC Production box so it can provision user access in the Production ECC but create security roles in Development ECC. This is typically what we see since most clients want to follow their manual transport process to get the security roles from Dev --> QA --> Prod.
Something I noticed in CUP is when a user adds a role to the request form u2013 the role is associated to a system (i.e. Production ECC or Development ECC). If we create a role using ERM and it only gets generated in Development ECC u2013 will we be able to select this role in CUP for user assignment in Production ECC? (assuming itu2019s been transported outside of GRC)
Note: At this point the new role will only be associated to Development ECC from a GRC perspective? So if we assign it in CUP u2013 it will only be associated to Development ECC...?
Do we have to manually perform another u201Crole import / syncu201D from the Production ECC to sync the roles so theyu2019re available in CUP?
This is based on the understanding that CUP looks for available roles for assignment from ERM rather than the Production ECC. Is that correct? Can we have CUP look in the backend rather than ERM?
My question is around the manual u201Crole import / syncu201D that needs to get performed for CUP. Is this really mandatory based on the requirements? It would mean I need to perform a u201Crole import / syncu201D every time a new role is created/deleted/changedu2026 Maybe Iu2019m missing something with the new 10.0 integration / functionality? Are other companies doing something different?
Please let me know what you think. Your insight is greatly appreciated!

Frank,
Thanks for clarifying.
Can you clarify what you mean when you say "you just need to tell CUP that the roles are available in PRD"? What does this mean?
This goes back to the original question - do we need to perform another import of the roles from ECC PRD to ERM? My understanding is that the ERM role repository is looking at my original import of roles and then each role I create using ERM after that. How will it know which roles are in PRD if I don't do a routine synch?
Also, you mentioned "each role has attributes that define in which systems it should be available for requests", where does this get defined? I believe you are referring to the "Role Status" which is set to Development, Production or Testing. I only see the ability to set this during the Role Import, but what about roles which have been created using ERM. I don't see it in the Role details screen - where is the setting?

Info about OIM and WebCenter integration

Any info or doc/url for OIM and WebCenter integration would be helpful. Any experiences etc please provide some links.

Follow the link -
http://docs.oracle.com/cd/E21764_01/core.1111/e12037/oam.htm#WCEDG345
Follow the below points -
*"Credential and Policy Store Configuration"*
*"Oracle Access Manager 10g Integration"*
*"Oracle Access Manager 11g Integration"*
*"Configuring WebCenter Applications"*
*"Configuring WebCenter and BPEL Authentication"*
*"Backing Up the Installation"*

BTRFS and Arch; integration points

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