Ok. I just delivered the computer. I replaced the Promise
Ultra100 IDE card with Promise FastTrak 100 Ultra. There was
some improvement in speed. I think because of the way Promise
handles the mirrored drives. Then I installed Reiserfs. Wow.
It's fast.
Reiserfs does replace ext2 and it rocks. I turned it off to see
what kind of damage it would do. Nothing. It was like it didn't
even notice.
Anybody want me to build you a NAS box? $2500.00 gets you 72
Gigs of mirrored storage.
Bob Crandell
ComSource Associates, Inc.
Your IT Department
747 Willamette St.
Eugene, Oregon 97401
www.comsourceinc.com
[EMAIL PROTECTED]
Voice: 541-345-0408
FAX: 541-345-0876
>>> Cory Petkovsek <[EMAIL PROTECTED]> 12/7/2000 4:48:51
PM >>>
Read up on Linux and ATA-100. New technology...
Linux does support it, Linux beat windows. However, it may not
be completely plug and play with Linux. Chris mentioned he was
getting corruption when he plugged an ATA100 drive in to the
ATA100 port on his motherboard. However I don't think he applied
any necessary patches (or whatever IS necessary).
Promise should have some linux info, and Google definitely will
have some.
Reiser is faster upon bootup (because it doesn't check the whole
drive after a system crash, only log files.) However faster than
ext2 in other situations? I don't know. Reiser is just another
layer put on ext2. How can this be faster?
Cory
On Thu, Dec 07, 2000 at 04:25:37PM -0800, Bob Crandell wrote:
> And I hear that ReiserFS is faster than ext2.
>
> I wish I had know about this things when I first built this
box.
> But now that I get to start over ...
>
> My buyer just told me that the Promise FastTrak 100 Ultra
> ATA/100 RAID card is $115.00.
>
> Thanks
>
> >>> [EMAIL PROTECTED] 12/7/2000 3:48:10 PM >>>
> Hardware aside, you need a journaled filing system, as Jakob
> suggested.
>
> Journaling works via transactions, and is used in more than
> just
> filesystems. Microsoft SQL and Exchange are two products I
know
> that use
> journaling. Here's how it works.
>
> Let's say we want to remove $100 from your bank account and
put
> it in mine.
>
> First we subtract $100 from yours, then add $100 to mine. If
> the computers
> crash after removing money from yours that $100 is lost in a
> non-journaled
> banking system.
>
> If it was journaled, it would go like this:
> Begin
> Subtract $100 from bob
> Add $100 to cory
> commit
>
> Either both things happen, or neither. The transactions are
put
> in to a log
> file. Once the begin and commit are in the log, the
database(or
> filesystem)
> is then updated. This enables a filesystem or database to
erase
> unfinished
> transactions, without caring what they did to the filesystem
> (because they
> didn't do anything, yet).
>
> With ReiserFS, you can pull the plug on it. When it boots up
> the filesystem
> doesn't check the whole system like ext2fs. Instead it only
> looks at it's
> transaction log, and either erases or commits transactions.
>
> There is the possibility of the outage happening at just the
> wrong
> moment.... However, this is clearly a better approach than a
> non-journaled
> filesystem for a redundant application. The ReiserFS sits on
> top of the
> ext2fs.
>
> Mike was telling me about the X file system that is coming
out.
> Also
> journaled. (Has nothing to do with XFree86). Perhaps he can
> share a bit.
>
> Cory
>
>
>
> -----Original Message-----
> From: Bob Crandell [mailto:[EMAIL PROTECTED]]
> Sent: Thursday, December 07, 2000 3:29 PM
> To: [EMAIL PROTECTED]
> Subject: [EUG-LUG:5216] Mirror
>
>
> Question:
> Is there a mirroring solution for Linux that is reliable?
For
> example, in the middle of copying a file to the drive, pull
the
> plug. Do you loose the file? or the whole partition?
>
> Explanation:
> I built a NAS box for a client. It interacts with Novell 5.1
> and is an FTP server for an Axis scanner. This box also
serves
> a
> CDROM tower. That's why I didn't sell them a SNAP.
>
> The Problem:
> The mother board choked on a bone or something and went down.
> When I finally got it back up, the mirrored drives were toast.
> I'm glad I told them to wait.
