Pros/cons of NFS vs local RAID

Hi:
We're buying a new Unix platform for out Oracle server. The CS group is inclined to house our DB files on networked disks (using NFS) as opposed to local RAID arrays.
Which is faster and/or more reliable? Are there any metrics on this?
Thanks in Advance
-dave

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RAID 5 Question - separate volume for OS/Apps: pros/cons

What are the pros & cons of having 2 volumes on a Mac Pro RAID 5 (instead of one big volume):
Vol 1: OS & Applications
Vol 2: Home Folders (basically everything else)
1) Is this a good idea/bad idea?
2) For what purposes would this setup be best used for?
3) At what point during the RAID 5 setup do you create multiple volumes and how is it done?
4) How/when do you set up the home directories to be on a separate volume from the OS/Apps volume and does the user have to do anything special during daily use to ensure they aren't saving/modifying anything on the OS/Apps volume?
5) I have four 250GB Barracudas sitting around and was wondering if they will work in a RAID 5 in my Mac Pro. I haven't heard of anyone using HDDs this small in a RAID 5 and Apple's website only talks about 500GB, 750GB, and 1TB in bays 2-4. Does anyone have this setup or know if it will work?
uryc hf bov-jna xrabov, lbh'er bhe bayl ubcr.

What are the pros & cons of having 2 volumes on a Mac Pro RAID 5 (instead of one big volume):
Vol 1: OS & Applications
Vol 2: Home Folders (basically everything else)
1) Is this a good idea/bad idea?
Bad. Using a separate drive (especially 10,000 rpm) for OS & Applications can be useful, but two volumes on the same drive (RAID behaves as one drive) means the heads have to continual move large distances, since home folders and system files are used a lot at the same time.
2) For what purposes would this setup be best used for?
If you often do things that destroy your system volume, you can quickly restore it from a backup copy, without having to worry if your user backup are completely up to date, but a separate system disk would still be better.
3) At what point during the RAID 5 setup do you create multiple volumes and how is it done?
After you create the RAID-5 with RAID Utility, create a volume and set its size to less than the default full size. You can then create more volumes. See page 8 of the RAID Userr Guide
<http://manuals.info.apple.com/en/RAIDUtility_UserGuide.pdf>
4) How/when do you set up the home directories to be on a separate volume from the OS/Apps volume and does the user have to do anything special during daily use to ensure they aren't saving/modifying anything on the OS/Apps volume?
For Tiger, use NetInfo Manager (Utilities folder). For Leopard, Right (or Control) click the user in "Accounts" system preference. Once set, the user doesn't have to do anything special.
5) I have four 250GB Barracudas sitting around and was wondering if they will work in a RAID 5 in my Mac Pro. I haven't heard of anyone using HDDs this small in a RAID 5 and Apple's website only talks about 500GB, 750GB, and 1TB in bays 2-4. Does anyone have this setup or know if it will work?
They should work. Apple only talks about drive sizes there were selling at the time the particular system was sold. If you have problems, though, Apple may blame the drives, and not provide much help.
uryc hf bov-jna xrabov, lbh'er bhe bayl ubcr.

What are pros/cons of using xmarks vs. firefox sync?

Used Firefox for a long while. Bookmarks morphed to Xmarks, which in turn has been acquired twice. I continue to use the newer Xmarks. In process of setting up a new computer, found that Firefox has it's own bookmarks sync.
Like to keep things as simple as possible. Does Firefox sync do all that Xmarks does? What are pros/cons of using xmarks vs. firefox sync?

I am not in a business environment, just my home. So, I don't know your specific requirements. I operate a dual G5 xserve, a dual quad-core mac pro, 6+ Apple MacOSX computers of varying types and several other linux servers plus a couple of Windows machines. If it were me, I would get two mac pro's running MacOSX Server and use one for backup of the other. The xserve RAID is too expensive from my point of view. I copy data from the xserve to several MacOSX computers with firewire drives for my backup and I have every computer on a ups. (I am assuming that they will not all fail at once!
I run Tiger servers and would suggest that you significantly test Leopard before committing to it.
Hope that helps.

Pros / Cons of Running APEX on separate server

Seeking feedback/thoughts on this general question.
I am maintaining an APEX application that utilizes multiple schemas all residing in the same database as APEX. I am wondering what might be the pros / cons of putting APEX in a separate database and server.
Would this necessarily yield security or performance benefits (or costs)?
How many changes would need to be made in the APEX configuration and code? I have read here in the forum that at a minimum database links would need to be created to the utilized schemas on the other server, with appropriate grants. What else?
Thanks.

Please help us by putting your first name into your profile. Thanks.
So what you want to do is have your application (and Application Express) access tables in a remote database. Yes, you can do that and database links are required.
This almost always has negative performance impact and sometimes results in things not working due to database version differences, especially with down-level Oracle versions.
It also makes application development more difficult if the Application Builder doesn't have local access to application parsing schemas. You can work around most of these problems by creating local views of remote tables, but I don't think 100% of the wizards and some SQL Workshop functionality are amenable to remote schema access. So I don't recommend it. What is your motivation to do this?
By the way, "servers" don't matter in this discussion, it's all about databases.
Scott

SAN bootable RAC nodes - PROS & CONS

Hi,
I'm trying to weigh in the PROS & CONS of having OS installed on SAN instead of local disks, in RAC participating nodes. One of our clients is insisting on this.. and here is an overview
the proposed RAC configuration...
Oracle 10.2.0.3
RHEL4U5 (2-node)
EMC Clarion SAN
Qlogic HBA
Is SAN boot really in the RAC certification matrix? Has anyone already come across this scenario? I googled around and looked metalink... couldn't find any pointers.
Any feedback is greatly appreciated.
Thanks,
Raj K

It is not in the ceritication matrix because it is not not supported. That is, Oracle doesn't care if the host is SAN booted or not. Most installations running on a SAN have filesystems from which Oracle is located running directly off the SAN.
It is a little different to set up, mainly BIOS settings on the host hardware to pick up the volume group(s) for the OS kernel. But other than that, it is essentially a good idea. It divorces the need to backup individual hosts. As long as the SAN backup is good all of your servers are good. Secondly, it makes the OS independent of the host, that way if a host node dies or has hardware issues you can replace it, set the BIOS and restart. IBM does this on all machines with LPARS and if you think about it, that is how all VMs work.
Cheers!
Jay Caviness
http://www.grumpy-dba.com

Pros & Cons of Using SAP PI Interfaces for Report Generation

Hi Guru's
I have a Scenario's like
I have to generate a customized report in SAP with the main data's available in SAP ECC and some required data available in the Legacy System.
I want to know the Pros & cons of using SAP PI RFC/Proxy adapter interface to get the data from the legacy system for each time the user execute the report in SAP ECC.
Thanks in Advance

There are couple of "dimensions" to consider in your PI interface design. For exemple when you are running the sizing exercise (Since we are considering adding a net new interface), you will need to capture specific information about new interface.i.e. S/A, adapters, frequency, avg payload size. etc..Note that the last two attributes will be hard to size properly in this case since you can't predict how frequent the end user will run the report which will impact the latency time required to pull the data. Latency will affect the user experience as visible side affect and definitely the SLA for other interfaces running at the same time.
On the other hand, the data you are trying to retrieve from the legacy won't be used for transactional purpose but for the end user to pull KPIs from the system which can affect ECC as well. You may end up doing lot hot fixes for your report (Assuming that the report is a medium complexity code)
There are other factors to consider but let's consider these are the major one.
Cheers,
F

How can I use firefox with pro con latte extention on a linux OS that runs via a USB?

What linux distro to use?
What version of firefox to use? (Since it has to be compatible with pro con latte)

Firefox tarballs from Mozilla Org use prefs within Firefox for updates. The "toggle" for not automatically updating - '''app.update.enabled''' and where to look for updates - '''app.update.url'''. The first needs to be '''''false''''' and the second could be a '''''null''''' string, do an update can't be found.
''I use both prefs to keep Firefox from updating by itself. I install each new version of Firefox as it is released, and keep the older versions around for reference purposes. Those prefs are the same since Firefox 1.5 came out.''
The versions of Firefox that are part of an operating system installation usually are that OS's own build of Firefox, and don't use the same update setup as Mozilla uses, in most cases. I am not familiar with Cent OS, but Ubuntu and Debian look for Firefox updates and from their own program repository servers outside of Firefox - as with the tarballs from Mozilla.

MAC PRO (Early 2008) RAID CARD ISSUE - SYSTEM FREEZEHello (hopefully someone can shed some light on my issue) I own as above a MAC PRO (Early 2008) this has a RAID card installed along with two 15k.7 cheetah hdd (320gb) and a spare drive, (which i m

Hello (hopefully someone can shed some light on my issue)
I own as above a MAC PRO (Early 2008) this has a RAID card installed along with two 15k.7 cheetah hdd (320gb) and a spare drive, (which i made a regular drive)
a while ago i had to replace the RAID card battery, so i did this, over a year later the same thing happened again, but as previous just left it and the system seemed fine for ages, until last night i was working in PHOTOSHOP and everything just froze and the screen kind of appeared GREEN, could not do a single thing. So restarted the mac, this time grey screen for ages and a message appeared, (macs version of blue screen) (see attached).
I restarted the machine and this time a flashing question mark folder!
could not do a thing.
so i found my copy of snow leopard and got the computer to run this and at least launch the DISK UTILITY and (Interestingly in the drop down menu RAID UTILITY was also in the menu) but it did not matter which utility i used the (RAID or DISK) neither could see any of drives, just the dvd drive.
so looked around on you tube and various forums and discovered if i take out the RAID CARD and re-plug the main lead from the RAID card back in to the LOGIC BOARD I would be reverting the MAC to a normal regular non-RAID computer.
After performing this HARDWARE task and inserting all three HDD, and running the DISK utility from the drop down menu via the SNOW LEOPARD disc.
(interestingly since the RAID card had been removed the RAID UTILITY from the drop down menu no longer appeared). running disk utility I can now only see the regular (spare) hdd and DVD Drive, but the two RAID HDD , again, still do not show up DISK UTILITY?
O.K. so i could chuck out the RAID card (AND RAID HDD) and just go with a regular set-up, and run a back restore from Time Machine on a NEW hdd purchased.
but what is wrong with the RAID, is the card at fault or are both HDD used for the RAID knackered? can i perform any tests, to see whats what?
thanks for your help in advanced.

hello people, the issue was in fact the GRAPHICS card nothing to do with the HDD or RAID system ( although this did cause issues with the RAID system it basically lost its way) below is my replay to another similar problem some one else had!
working in photoshop and then everything stopped working and the lot froze! only option was to force shutdown (via button).
and try to restart, hoping all was fine, this was not the case :-(
I had the added issue of the RAID card system, that i have, this was confused to say the lease and would not behave or work, causing the start up to hang.
so i thought the HDD must be bust and the root cause. ( but soon learnt it was not the cause )
...bought a new HDD removed the RAID card and replugged the cable from RAID card into LOGIC board, ( making the computer act like any normal non-RAID system). I managed to install the OSX, using the snow leopard disk way. once the mac was running, i started to notice the screen would flicker and started to see 'artefacts'. so i started to reveal my symptoms to the web and forums and soon discovered that my graphics card could be the issue all along?.
(nvidia geforce 8800gt 2x dvi).
I read up on that a fix, could be either A. reply the thermal paste, as the card could be over heating or B. stick the card in the oven trick.
Tried option A. first and nothing still issues, so last night took the plunge carried out option B. and ta da it worked! i even managed to run
from my new HDD my lasted install OS X, absolutely fine. I then thought, maybe i could repair my RAID so replugged all the HARDWARD back in and
carried out a disk repair and disk permissions on drives( took a small amount of time), via the SNOW LEOPARD disc - (Disk utilities) and this worked and now have my system working as it was just over 6 days ago.
what was the cost to get this? bought a new hdd so 40.00gbp and thermal paste and cleaner kit ( your still need to do this ) search video card trick on you tube.
and renew thermal paste, approx 15.00gbp, technically i don't need the new HDD, but it was all part of the trial and error way i went. ( i do have extra storage as a result!)"

How can you get the filter off if you can't remember the password? It's"pro con" and it wont even let me check out the rates for aflight.

How can you get the filter off if you can't remember the password? It's"pro con" and it wont even let me check out the rates for aflight.

You can check the file prefs.js in the [http://kb.mozillazine.org/Profile_folder_-_Firefox Firefox Profile Folder] and remove the line(s) related to that extension (procon.password).

Is there anything available that covers the pros/cons of a simple and network PCD migration?

Is there anything available that covers the pros/cons of a simple and network PCD migration?

Hi,
as such there is no DOC but I can share my views:
Under Pros:
a. PCD is an application use to migrate older versions[6.1.5, 7.x , 8.x] running on MCS to VM servers.
b.It can be used to change the IP address or hostname on new servers without affecting existing version .
c. Many users using MCS Hardware are not willing to migrate to latest version because of existing HW not supporting interim releases which they have to hop through to get on to the target release.
d. Further, this requires license re-hosting as well for interim releases and major downtimes as well which can be avoided by using PCD without disturbing existing setup.
e. Also, DRAM/HDD sizing needs to be considered while doing migration on MCS.PCD addresses these issues for migration.
Under CONS:
a. It needs to be ordered through Product Upgrade Tool and bootable is not downloadable from Cisco site.
b. You could face some issues while doing migration which could be bugs but can be resolved.
c.could face issues while discovering cluster/doing migration but can be resolved.
regds,
aman

Pros & Cons for consuming web services in ABAP using ABAP PROXY

Hi,
Other then performence is there any other disadvantages like security,etc for consuming web services in ABAP using ABAP proxy?
I really appreciate if some one provide the more details(Pros & Cons ) regarding cosuming web services and I also want to know is there any other way to consume web services in ABAP.
Thanks.

 is there any other way to consume web services in ABAP
you can use cl_http_client class to make your program to act as http client and post the soap message too webservice. This way you dont need to generate proxy, but you should know the soap message format.
Regards
Raja

There are multiple MAC's in my house and I am considering buying Time Capsule to use as a file sharing device. Is anyone doing this? Pros/Cons?

I have multiple MAC's in my house. I would like to create a file server environmet. I am considering using Time Capsule. Is anyone doing this? Pros/Cons?

The Linksys should be about as fast as the Time Capsule. So you might as well connect the Time Capsule to the Linksys, disable sharing and wireless.
Solution two is to use the TC as the router, wireless and network drive. This would save the power the Linksys needs. What is the Linksys connected to? a separate modem?

One Legal entity two company code - pros & cons

Hi SAP GURUS,
We are having one legal entity with multiple products. I want each plant to be a profit center. But i am loosing plant wise profitability when we are transferring the same product from different plants, in a common depot. This is because we are not having batch & hence profitabilty for plant is lost when it is sent to depot for sale.
In this case I am thinking to go for two company code. One manufacturing & Other selling. What will be the pros & cons in this case.
Thanks
CHEERS

Yes ! kishore You are obsolutly correct !
Hi Nitin,
As per my understanding your issue seems profit cannot be determined while sending goods sending plant to another palnt. For that SAP suggested to use Transfer pricing in Prrofit centre accouting & your valuation must be profit centre valuation not company code to get internal reports.
Rgds
ManiSuma

Using Business area for External Reporting-Pros & Cons?

Dear Freinds,
We are a Retail Business Group half way through SAP IS Retail implementation. We have 8 legal entities, currently their complete Annual Financials are being made & audited separately. In SAP the structure is that there is Single Co. Code & transactions will be seggregated by Business Area (made manadatory for data entry) and Annual Accounts will be drawn up using Business Area.
This to me does not seem to be the right structure. I have joined the group recently, I will be much thankful to you all if you please help me list the Pros & Cons of using Business Area for external reporting.
Rajesh Agarwal
[email protected]
Edited by: Rajesh Agarwal on Jan 27, 2008 6:54 PM

Dan: For management reporting you may not want to post eliminations between companies where the business areas are the same.
If the Business wants to see the eliminations between companies, within the same business area, as part of BEx reports, what should I do? They do not want to execute consolidation functions in UCMON but just want to see how the eliminations have taken place between companies with in the same business area.
Dan: As long as the partner company and partner business area are consistently included for the intercompany transactions, the eliminations between Legal and Management will agree at the top-level of each hierarchy.
Have I to introduce one more InfoObject Partner Business Area in the data basis and assign the role Sub-assignment once again?
Thanks in advance.

RMAN backup with archivelog (pros/cons)

When performing a "backup database with archivelogs" where does rman store the info contained in the archive logs. If I do a backup like this do I still need to keep the archive logs out on disk? Does this increase time to do backups? I have some production databases that are close to 500gb. Wondering what the pros/cons are doing a backup this way.
Thanks All!

user10784896 wrote:
When performing a "backup database with archivelogs" where does rman store the info contained in the archive logs. The info stored in the archive logs (what you asked about, but probably not what you meant) is stored in the archive logs. The backups of those logs are stored in a backup set. The information about the logs is stored in the control file.
If I do a backup like this do I still need to keep the archive logs out on disk?
You have backed them up, right? Archivelogs are not actively used by the running database, right? If you don't delete them after they are backed up, let me know who you buy your disk storage solutions from, as I'd like to buy stock in that company.
Does this increase time to do backups? Anything you do "increases time to do" vs. not doing something. (The most efficient SELECT statement is the one not executed). The question is does this have a practical, measurable degradation of performance that is intolerable to my organization? The answer undoubtedly "no".
I have some production databases that are close to 500gb. Wondering what the pros/cons are doing a backup this way.
Pros are you can recover your database.
Cons are, you can't recover your database.
And it looks like we need to point out that the housekeeping of your archivelogs can and should be handled by rman, not outside of it. Look at "backup archivelog not backed up n times" and "delete archivelog backed up n times", and other variations of 'backup archivelog' and 'delete archivelog'.
>
Thanks All!

Pros/cons of NFS vs local RAID

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