Seek for advice on 845Gmax+333DDR

Hi, I have a 845G Max, 333Mhz DDR 512MB memory, could anyone give me advice on the memory settings in the BIOS, such as the CAS things. Thanks a lot!
Jerry

hi
as far as cas goes it is safest to leave it on auto
the lower it is the faster your ram works
how ever set it to low and your ram may refuse to work
if you dont know how to clear your cosmos
leave it aone
take a look in the nforce forum for all the posts re bios
2.5 were people cannot get their boards to boot at all
and are awaiting msi sending them new bios chips
this was down to the bios setting ram to cas 2
and caused a lot of grief

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Seeking for advice on enhancing BW reporting speed

Hi all,
I am currently supporting a BW 3.0 system, but not so familiar with BW. BW reporting is getting slower these months. I would like to seek for some advices on enhancing BW reporting speed. Could anyone give me some advices?
Many thanks!
Best regards,
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Hi
Use Aggregates, Compression / partitioning of the tables at Bi side.
Do not Use much Nav. Attributes, Virtual Key figs at Query
Use Statistics Queries to know where the query is consuming much runtime for better analysis.
Read Page No.28
https://www.sdn.sap.com/irj/scn/go/portal/prtroot/docs/library/uuid/afbad390-0201-0010-daa4-9ef0168d41b6
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New Oracle on Linux, Oracle noob seeking for advice

I am working as a consultant for a medical group and they are in the process of buying a ERP solution that requires a Oracle DB, since I am a network/security guy I will ask you guys for advice.
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Best Regards,
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Prando,
First, EL5 is fully compatible with RHEL5. The only difference is about oracle logos. Whether you deploy rhel5 or el5 or not, you can get the unbreakable support. SAMBA packages are conatained in el5 and rhel5 dists. So oracle will provide updates for samba package and you will not loose oracle supprot.
http://www.oracle.com/technology/tech/linux/htdocs/oracleonlinux_faq.html
regards
zhiqing

[SOLVED] Seeking for advice at aur package managment.

Hello again.
I've been using arch for a little time but this far I like it more eveyday.
I've installed virtualbox PUEL from the AUR with makepkg and pacman -U. It's working fine.
But I want to install more software from the AUR. Actually, maybe I'll be installing lots of software from the AUR. My question is, since these software is installed "manualy", is there an easy way of keeping it up to date?
I've tried yaourt but I really don't like it very much. (Im not using sudo [maybe later] and it asked my root password 3 or 4 times and finally wasn't able to install anything; pacman works fine. Yaourt has no good documentation) I even created an AUR account to see if there was some way of getting notifications of updated packages to upgrade them manually. But this far, I haven't found any satistactory solution.
Edit: Also, I've seen that at least for virtualbox and yaourt, there are repos that can be added to pacman. Can I add a repo for each piece of software chosen from the AUR? Are there repos only for some "very used" software?
Thanks for your advice.
Last edited by ztrange (2009-08-02 06:44:08)

ztrange wrote:
H
But I want to install more software from the AUR. Actually, maybe I'll be installing lots of software from the AUR. My question is, since these software is installed "manualy", is there an easy way of keeping it up to date?p
Actually, I think that with yaourt you could do the best update for all AUR-installed packages. yaourt -Syyu --aur --devel for example.
I've tried yaourt but I really don't like it very much. (Im not using sudo [maybe later] and it asked my root password 3 or 4 times and finally wasn't able to install anything; pacman works fine. Yaourt has no good documentation) I even created an AUR account to see if there was some way of getting notifications of updated packages to upgrade them manually. But this far, I haven't found any satistactory solution.
Try aurbuild as well
Edit: Also, I've seen that at least for virtualbox and yaourt, there are repos that can be added to pacman. Can I add a repo for each piece of software chosen from the AUR? Are there repos only for some "very used" software?
Thanks for your advice.
Except for [community] of course
I can think of two unofficial repos:
repo.archlinux.fr
[archlinuxfr]
Server = http://repo.archlinux.fr/i686
or
[archlinuxfr]
Server = http://repo.archlinux.fr/x86_64
and adslgr32/64
amd64
[adslgr64]
Server = http://adslgr64.tiven.org/archlinux/x86_64
and the
i686 one
[adslgr32]
Server = http://adslgr32.tiven.org/archlinux/i686

Seeking for advice over software development start-up question

Hi Admin ,
My friend who is an internet marketer at warrior forum told me about Adobe AIR. He said that programs developed on Adobe Air could not be decompiled. I am a forex software developer that created both a trailing stop ea and forex charting software on the Metatrader 4 open source trading platform. My concern is that the software which i developed could be decompiled.
I have a programming team and they have little or few experience with Adobe Air. I was thinking that before i ask them to research and start developing our software on Adobe AIR platform, could you help us but answering some important questions regarding AIR?
Is it true that AIR applications cannot be decompiled?
Forex software in .ex4 format and .dll files be transferred over to AIR format?
Could there be a communication between AIR and Metatrader 4 trading platform ?
For more info, visit these url :
Metatrader 4 : http://www.metatrader4.com/
Forex Applications which i Developed on Metatrader 4
1: http://www.forexgeometry.com/
2. http://www.forextrailer.com/
Regards,
Warren Seah

There is no software that cannot be decompiled and/or reverse engineered. ActionScript is actually one of the easier languages to decompile. There are obfuscators and other protection schemes, but I can't attest to how well they work.
You can write an ActionScript wrapper for dll libraries (in many cases). I don't know what .e4x format is.
An AIR app can communicate with another application or server in a variety of ways. The most common include HTTP and sockets.

I have a MacBook Pro 5,4 running OSX 10.6.8 and Safari 5.1.10. A website i like has a known bug with 5.1.10 and recommends I install a newer version of Safari or use Firefox or Chrome. Just looking for advice on the best approach. Thanks!

I have a MacBook Pro 5,4 running OSX 10.6.8 and Safari 5.1.10. A website i like has a known bug with 5.1.10 and recommends I install a newer version of Safari or use Firefox or Chrome. Just looking for advice on the best approach. Thanks!

Unfortunately, Safari cannot be updated past 5.1.10 on a Mac running v10.6.8.
So, the options are to upgrade to a newer OS X or use Firefox or Chrome.
Be aware, Apple no longer support Snow Leopard v10.6 > www.ibtimes.com/apple-kills-snow-leopard-os-x-106-no-longer-receives-security-u pdates-1558393
See if your Mac can run v10.9 Mavericks > OS X Mavericks: System Requirements
If so, you can download and install Mavericks for free from the App Store.
Read prior to upgrading > Upgrading to 10.7 and above, don't forget Rosetta! | Apple Support Communities

Looking for advice on fixing my Ibook

Hello all,
First post here and it's going to be a long one, so I apologize in advance for that and thank anyone who manages to wade though to give advice. Trying to get as much info into this to hopefully help you help me.
I have an Ibook G4 that was handed down to me in the last year due to my old comp dying. It was working perfectly until approximately one month ago.
The issues started with the original hard drive. Without doing anything new on my computer I started randomly having strange issues with various apps. I rebooted the computer and got the kernel panic message telling me to reboot the computer. I did so and then immediately went to the ?/finder icon screen. After trying Disk utility from the disks that came with the laptop, I just got errors when trying to repair the disk and repair permissions was not even available.
I took my laptop into my local apple store for advice and after they saw what it was doing they told me my hd had failed and offered to happily replace it for somewhere around $200. I happily thanked them for their help and went on my way.
I picked up a western digital 160 gig eide drive and installed it myself without problems. I was able to install the os from the included disks and then upgraded to 10.4 plus all downloaded updates. It worked fine for a couple days and then I decided all was well so started adding music to itunes since I finally have the hd space to add new music to my ipod. After a couple days of use Itunes started giving me errors while changing songs in Itunes and while clicking on any screen other than Itunes. Firefox then started acting strangely so I decided to reboot.
I was unsuccessful at getting fully loaded in again so I booted from the included disk and repaired permissions and disk using disk utility. This fixed the problems temporarily, however itunes was immediately giving me the error messages again. Continue forward a bit and now I get errors in disk utility saying that it failed to repair the disk.
I then gave up and decided to just wipe the drive and start over again. I used the erase the writes 0's over the whole drive which errored out towards the end. I suspected I might just have a bad drive but decided to reboot and just erase (basic quick one), partition, and install the os. That install also failed towards the end of disk one install. Went into best buy where I bought the hdd for advice and they agreed it sounded like a failed hdd too. Bought another one (to return the prior one for a full refund after I swap it out) and install it.
At this point I am getting pretty comfortable to dismantling this laptop so it only takes me around 1.5 hours or so fortunately, however as soon as I got the hd installed and tried to format in disk utility it wouldn't even show up on the screen even though I could hear it spinning. I was suspicious of the hd cable since it just doesn't seem like there is enough of it to make a good connection to the logic board, so I took the bottom of the comp off and just messed with the cable/logic board connection a bit. This was able to get the hd showing up in disk utility.
Got 10.3 and downloads installed because I don't have the 10.4 disk with me right now. Every time the computer rebooted during the update process, it went to the ?/finder icon screen. I had to hold down the power button to shut down and then power back up after which it would boot up fine. Already concerned about what this meant but just went with it.
Due to the issues I haven't tried installing anything else or even using many apps. I downloaded firefox and a couple other dmg's in preparation for upgrading the os in the morning. I moved a couple of those files to my partition successfully but after trying to move a final one the finder locks up. Nothing would load after finder reloaded so I rebooted. Now the computer just goes to the gray screen with the apple on it and a loading circle on the bottom but never gets past it. I also periodically get the kernel panic reboot computer message on this screen as well (not every time though)
My next step for trouble shooting will be trying to pick up a new hd cable, however this may be difficult without access to a computer I can do online ordering on.
Now for some of my thoughts. After all of that and many many hours spent using google and searching these forums I have seen a couple suggestions which could apply. The kernel panic messages could indicate that I am having memory issues, however I just can't see where that would cause files getting corrupted and causing me to have to repair permissions and disk. I can see where the hd cable failing could be causing issues, but I don't understand how that could account for everything when I don't even move the computer and it starts having issues.
I am to the point of desperation with this computer. I want nothing more than to just throw it on the ground and jump on it and maybe introduce it to a sledge hammer, however I just cant fit in purchasing a new computer right now. Paying my local apple store hundreds of dollars to try to fix something they may not even be able to fix also just doesn't seem like a viable option when I feel capable of fixing a large portion of issues myself (more familiar with pc's at this time unfortunately though).
Thanks to any of you out there who make it through this book where I probably give far too much detail. I am open to any advice you have to give to me at this point for where to go from here.

There's the possibility that the new hard drive you purchased has a problem. The only way to really check that is with another computer with no known issues.
Do you need the computer to be portable? If so, pick up a portable enclosure. Otherwise, any enclosure that will house the hard drive would be fine. Get the drive into the enclosure, then install the OS to it. If it runs fine while in the external enclosure, there's some connection inside the machine--possibly the cable--that has failed you. If you still have problems when the drive is in an enclosure, that suggests a problem with some part of the logic board or perhaps the drive itself is faulty.
~Lyssa

New to photoshop, looking for advice on creating a stencil design, can anyone explain how to do this

Heya,
So I'm hoping to get back into photoshop, my knowledge at the moment is pritty minimal, but i'm going to start learning how to use it again.
I'm new to this forum and don't intend to come on here often for advice but i hope that someone would be kind enough to point me in the direction that i'm looking for, i would be very grateful.
Firstly, i haven't yet decided which adobe photoshop product is best suited for what i'm looking for and i aim to go and explore the trials first to find out.
I'm looking to create designs with software that doesn't really have any limits in terms of creating designs.
I was wondering if someone could give me some links to a tutorial or something that explains how to create the stencilling effect in the image that is seen as a tree with a cityscape in the background, and possibly the other effects seen on the t-shirt. I know it might be a lot to ask but it would really mean a lot if someone could explain how you create effects like this.
Here's the image:http://www.gifts.com/products/Kohls/Mudd-Tree-Tee?p=6886:1945256129:35
I know that the image is small, it was the best i could currently find, i hope that you can still see it well enough.
Thank you in advance
I really appreciate it!!

First you may want to google »photoshop tutorial distresssed«.
As for combining images like that a combination of Blend If-settings (one can split the handles by alt-click-dragging them)), Layer Groups set to Blend Modes other than Pass Through and Grtadient Maps may be employed to maintain high editability.
One could also just use the images as Layer Masks for Solid Color Layers (and use Levels or Curves to get the intended contrast), though.

New System Build For Premiere 5.5 Looking For Advice

Hi there, this is my first time on here and it looks like this is the best place for advice.
So I've been tasked to build a new computer for a client for Premiere 5.5. He's running a very basic studio setup and his main complaint is how it takes
such a long time to render video. He told me it takes him about 6 hours to render a 40 minute sequence to MPEG2 standard(this is what he mostly renders as). I did some playing around and it turns out that his current system is relatively good but it uses a HD 6990 as its GPU(which can't even take advantage of Premier's hardware rendering capability!)
Now initially I was going to go the all SSD route with a a budget of about $2500 or so. However, after doing some reading on here, I've decided that this
isn't necessarily the best way. So I will only run the OS of an SSD. Here is what I have so far:
PROCESSOR:
Intel Core i7-2600K Quad-Core Socket LGA1155, 3.40Ghz, 8MB L3 Cache
(I will overclock this as much as possilbe with the Noctua cooler)
MOTHERBOARD:
Asus P8Z68-V Pro Socket 1155 Intel Z68 Chipset
RAM:
G.SKILL Ripjaws X Series DDR3 1600MHz (PC3-12800) 16GB (4x4GB) Dual Channel Kit
VIDEO CARD:
EVGA GeForce GTX 570 HD Superclocked 1280MB GDDR5 (012-P3-1573-AR) nVidia GeForce GTX 570Chipset(797MHz) 1280MB GDDR5 Memory(3900MHz)
POWER SUPPLY:
OCZ ZX Series 1000W Fully Modular 80 Plus Gold Certified Power Supply (OCZ-ZX1000W)
HARD DRIVES:
OCZ Vertex 2 SATA II 2.5" 120GB Solid State Drive (OPERATING SYSTEM DISK)
Western Digital VelociRaptor (WD3000HLFS) 300GB SATA II 10000RPM 16MB x2 (Project Disk Run in RAID 0)
Western Digital VelociRaptor (WD3000HLFS) 300GB SATA II 10000RPM 16MB x2 (Output Disk Run in RAID 0)
CPU COOLER:
Noctua NH-D14 Six Heatpipe Dual Radiator CPU Cooler
OPTICAL DRIVE:
ASUS DRW-24B1ST Black SATA
Now if there are any suggestions, PLEASE let me know how I can improve this build. I really don't want to disappoint the guy, especially if he isn't going to get a great performance boost in terms of rendering time. Considering he can't use GPU acceleartion right now on his $600+ card, I would imagine this should be a better build.
Also, will there be a problem if I run four hard drives in RAID 0 mode using the motherboards onboard RAID capability?

Photomaster,
I think you are on the right track to speed up this guys system (2600k w/ OC, dual RAID 0) and I second Harm's comment about large 7200 drives being better than the prev. generation VR 300GB drives (HLFS series).
Be aware however that "rendering" does mean different things, and if you are thinking that MPE will increase AME rendering to MPEG2-DVD by 10x you will be very disappointed! Here is the rest of the story...
Timeline rendering, as benchmarked in PPBM5, will indeed speed up on the order of 10x with the addition of MPE using the appropriate nVidia hardware. PPBM5 is a test carefully constructed test that represents how long it takes for Adobe Premiere Pro to prepare (render) a timeline for playback. In actual use, your results will vary. Some timelines may only be sped up by 2x (i.e. very complex and/or using non-MPE effects, filters, etc.) to more than 1,000,000x faster for the case where a non-MPE system requires rendering, whereas the MPE system can play back the timeline without ANY rendering (i.e. simple SD timelines with MPE compliant effects).
Next, full timeline rendering and "exporting" from a Premiere Pro timeline to MPEG2-DVD format are both sped up, but more on the order of 2x. On my fast quad-core system, I'm getting about a 1.8x improvement from MPE assistance using the PPBM5 project for testing.
Finally, using Adobe Media Encoder (AME), and I can only speak for CS5, the MPE hardware does not even come into play and does not speed things up at all. On a positive note, Harm has reported that AME ver. 5.5 ran just over 2x as fast as ver 5.0.3; possibly the newer version is in fact tapping the MPE hardware for this gain?
Regards,
Jim

Asking for advice--for beginning (but artistic) photographer. Recommend Lightroom 5 or Photoshop Elements 12 (Windows 7 OS)?

Asking for advice--for beginning (but artistic) photographer. Recommend Lightroom 5 or Photoshop Elements 12 (Windows 7 OS)?

MarwanSati your install log appears to be free of errors. I would recommend you post your inquiry about accessing this feature within the Photoshop Elements forum.

Is MS exchange the only way to keep mail synced across all devices? Can Mac mail do this without exchange? I have iPhone,iPad and new MacBook Pro, and looking for advice please.

Is MS exchange the only way to keep mail synced across all devices? Can Mac mail do this without exchange? I have iPhone,iPad and new MacBook Pro, and looking for advice please.

As Bob says, any iMap service can do this. GMail can, iCLoud mail can too.
Both of these can be used with Mail on any device.

Asking for advice on adding products with descriptions to webpage

I am a web design and dreamweaver newbie and am in my very limited experience, working on creating a virtual mall. I'ts something I always wanted to do...go figure..lol. I do have a lot of companies that will advertise and I have access to their Java and HTML links. I have created (in my mind...lol) I pretty decent start on a homepage from a free template and I want to create pages with pictures and descriptions but I am not sure the best way to go. I cannot afford to have a pro do this for me so I am fishing for some good advice. I know about creating tables but I hear that tables are so 90's and dreamweaver can do it better in a different format. I have looked through the forums for advice but not have found what I am specifically looking for. The way I have it from the homepage is that I have links to product types in the content portion of spry accordian and created pages akin to my homepage to display them but from there...not sure. I do not have a lot of available free time, hardly any to be honest, so if anyone can point me in a good direction or have any good ideas, I would really appreciate it. Here are my questions:
1. Is there a better method to display products besides tables in CS4, and if so, how would I best proceed? The idea is 3 columns and 4 rows of products with descriptions underneath. The links provided by the companies would take them to the company website to purchase. I didn't want to alarm the companies by posting a site without some products available but I need some help.
2. Is it possible and if so, is it a good idea to add a spry tabbed panels into the content portion of the spry accordian? Would I have to establish an editable region or something specific to allow it to be functionable?
Separate Question:
1. I am not sure if I can even ask this coherently but will give it a shot Does DW have a tutorial on adding some type of flash css or revolving pictures to be built into my header area on the homepage? I do have DW fireworks and I really want to spruce it up...
I will load the homepage online today to www.virtmallshop.com. The product links pages won't be availabe except one to give a reference. Understand that you all know a heck of alot more about this then me so please be kind!
Thank you
D

For Umlaut, you could probably use phonetic keyboard. Highly recommended.
Use "Ukelele" to create keyboard layout and use dead key to map umlaut (like 'u = ü). With phonetic keyboard you can type as fast as with native keyboard (if not faster) and in unlimited number of languages, without re-learning the layout.
Brackets are quite easy accessible on Apple keyboard.

Web Based Messageboard (JSP, XML, XSLT) - Just Looking For Advice Please!

I have a general question - I am not looking for any code, just some advice if possible. I am studying on a Masters course and I have been given an assignment to do which I am having difficult getting started. I have worked a lot with Java up until now, however this is the first time I have had to JSP on my course.
My current assignment is that I am required to create a simple web based message board, using JSP and XML, which allows users to post messages to the board, and also to reply to messages. The content of the message board is stored in an XML file, and there is no database involved. The message data needs to be formatted for viewing in a browser using XSL transformations.
I am stuck as to how to go about starting the project, and this is all I am asking for advice in. I have created the basic XML file which has some preliminary data stored within it, and I have created an XSL stylesheet to transform this data, however I am stuck with the JSP. Do I need to create a seperate JSP page for each page of the website? How does this link in with the XSLT?
I would welcome and really appreciate any advice, but I stress that I am not looking for anyone to give me any code or anything like that.
Thanks.

You can use XSLT to convert XML to HTML. Then include this HTML in your JSP. Further on you've a plain HTML form with an input field for a message which you submit to a servlet. In the servlet validate/convert/whatever this message and add it to the XML file and then forward/redirect the request back to the JSP.

How is it possible to use Index Seek for LIKE %search-string% case?

Hello,
I have the following SP:
CREATE PROCEDURE dbo.USP_SAMPLE_PROCEDURE(@Beginning nvarchar(15))
AS
SELECT * FROM HumanResources.Employee
WHERE NationalIDNumber LIKE @Beginning + N'%';
GO
If I run the sp first time with param: N'94', then the following plan is generated and added to the cache:
SQL Server "sniffs" the input value (94) when compiling the query. So for this param using Index Seek for AK_Employee_NationalIDNumber index will be the best option. On the other hand, the query plan should be generic enough to be able to handle
any values specified in the @Beginning param.
If I call the sp with @Beginning =N'%94':
EXEC dbo.USP_SAMPLE_PROCEDURE N'%94'
I see the same execution plan as above. The question is how is it possible to reuse this execution plan in this case? To be more precise, how
Index Seek can be used in case LIKE %search-string% case. I expected that
ONLY Index Scan operation can be used here.
Alexey

The key is that the index seek operator includes both seek (greater than and less than) and a predicate (LIKE). With the leading wildcard, the seek is effectively returning all rows just like a scan and the filter returns only rows matching
the LIKE expression.
Do you want to say that in case of leading wildcard, expressions Expr1007 and Expr1008 (see image below) calculated such a way that
Seek Predicates retrieve all rows from the index. And only
Predicate does the real job by taking only rows matching the Like expression? If this is the case, then it explains how
Index Seek can be used to resolve such queries: LIKE N'%94'.
However, it leads me to another question: Since
Index Seek in
this particular case scans
all the rows, what is the difference between
Index Seek and Index Scan?
According to
MSDN:
The Index Seek operator uses the seeking ability of indexes to retrieve rows from a nonclustered index.
The storage engine uses the index to process
only those rows that satisfy the SEEK:() predicate. It optionally may include a WHERE:() predicate, which the storage engine will evaluate against all rows that satisfy the SEEK:() predicate (it does not use the indexes to do this).
The Index Scan operator retrieves
all rows from the nonclustered index specified in the Argument column. If an optional WHERE:() predicate appears in the Argument column, only those rows that satisfy the predicate are returned.
It seems like Index Scan is a special case of Index Seek,
which means that when we see Index Seek in the execution plan, it does NOT mean that storage engine does NOT scan all rows. Right?
Alexey

Request for advice configuring/mounting XRAID

I'm asking for some advice about configuring Xserve RAID.
I am not an IT person, but just a researcher and have found
myself in charge of some computing resources.
We have an Xserve RAID - 14 drive, each set of 7 on RAID5 - connected
through fibre switch to an Xserve head node. (The fibre switch is
because we will probably add another Xserve RAID in future)
The intent for the RAID is to hold our data while we do our computations.
We have a small cluster of Xserve cluster nodes for distributed Xgrid and
Matlab computation. I intended to network mount the RAID on each computer
in cluster. All the users will ssh in to a shell, and none will login to
a desktop.
I have just begun to setup the RAID, but ran into some questions that
I thought I would ask for advice before I proceeded.
I have already striped both controllers together with software RAID.
(diskutil createRAID stripe "Journaled HFS+" "RAIDvol" disk2 disk3)
It created the stripe and created the jHFS+ file system, but I didn't
realize it would also mount it in /Volumes/RAIDvol
1. Do people have advice on whether I should keep this mount point?
I had rather thought I would mount in root (/) on head node and
cluster nodes, e.g. /RAIDvol instead of /Volumes/RAIDvol
(And how should I change the mount point? Evidently not through fstab
- should I use NetInfo(niutil) and is that complicated?)
Before I change it from mounting in /Volumes, are there any reasons not to?
(again, no one is going to see a desktop, everyone will ssh into a shell)
2. Should I have striped the disks together, or concatenated them?
(What's the difference? - any performance difference?)
3. Do people have advice on network mounting, AFP vs NFS? What
performance differences should I consider?
Thanks for everyone's help.
dmaus
Xserve RAID Mac OS X (10.4)
Other OS

>1. Do people have advice on whether I should keep this mount point?
By default all external volumes will mount under /Volumes.
It is possible to change, but I'd leave it there, it's not worth the hassle trying to bury it somewhere else, and if no one's logging into the desktop then no one's going to notice it anyway. Since it's being shared to the other clients it can be mounted at any point outside of /Volumes, but I'd leave it in /Volumes on the head node.
Trying to change this will just run into problems later on when Apple change their model.
>2. Should I have striped the disks together, or concatenated them?
(What's the difference? - any performance difference?)
Striping is better than concatenation.
The difference is in how the volume is laid out, and specifically how the data is written to the volumes.
If you write a large contiguous file to a striped volume, a chunk of data (32K by default) is written to the first LUN (half of the array) then the second chunk us written to the second LUN). This alternating pattern gives you the best throughput since the RAID is effectively writing to al 14 disks at once, and can be flushing the buffers on the first 32K while the next 32K of data is being written to the other LUN.
By comparison, concatenation simply appends the second LUN. As you write your file it is all written to the first LUN and it's only when this LUN is full that you start writing to the second LUN. Therefore your throughput is much lower since you're only using half the disks at once.
Concatenation is easier to setup since some volume formats allow you to grow a volume by simply adding more space at the end, whereas slicing requires a reformat, but those are your choices.
>3. Do people have advice on network mounting, AFP vs NFS? What
performance differences should I consider?
Performance is one factor, security is another. NFS doesn't offer any significant security other than which IP addresses are allowed to mount the volume. AFP supports authentication to ensure that the specific user can mount the volume.
This may or may not be relevant to you depending on how the clients are mounting the volumes, and whether you want there to be any crossover between the clients. If they're being mounted at startup (so the volume is always available) I'd probably opt for NFS. Home directories, on the other hand, would be better served via AFP.
Performance wise NFS might have a slight edge, but I've heard others say AFP does, so YMMV.

Seek for advice on 845Gmax+333DDR

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