Re: Filesystem redundancy

2005-11-28 Thread Joachim Schipper
On Mon, Nov 28, 2005 at 12:50:13PM +, Julian Smith wrote: on filesystem redundancy I'm not sure I fully understand exactly what AFS offers in this area, but it comes with a lot of extra stuff that I don't need, and also seems very complicated. I think I'll persevere with dupfs/LD_PRELOAD

Filesystem redundancy

2005-11-16 Thread Julian Smith
I've been wondering about how to cope with random hardware failures when data is being received from a WAN and written to local storage. As I understand it, CARP(4) will enable any one of N machines to handle incoming requests, so hardware failure of up to N-1 machines will be handled. But if

Re: Filesystem redundancy

2005-11-16 Thread Per-Erik Persson
AFS would handle your storage in a redundant and distributed way where you easily can add and remove a machine. But this is not a thing you set up in an afternoon :-) People seems to be afraid of it since it's complexity. But when the work is done you wonder why people pay huge amounts for NAS

Re: Filesystem redundancy

2005-11-16 Thread knitti
There are SCSI enclosures with the ability to connect to two different SCSI buses, so they can be accessed from two different machines. I _think_ the SCSI architecture could allow more than one host adapter on a bus. _But_ I never heard someone did this. I presume it would also depend on the host

Re: Filesystem redundancy

2005-11-16 Thread Martin Schröder
On 2005-11-16 11:08:51 +, Julian Smith wrote: One way of handling this would be to write a filesystem that copies the contents of modified files over a network before close() returns. That way, as long as a SMTP server (say) checks the return from close() before telling the sender that it

Re: Filesystem redundancy

2005-11-16 Thread Marco Peereboom
This is actually pretty common believe it or not. This does not provide filesystem redundancy though. What this provides is a mechanism to have multiple servers to touch the same disks. There clearly is some danger here since you can't have multiple machines touching the same filesystem

Re: Filesystem redundancy

2005-11-16 Thread Will H. Backman
-Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Marco Peereboom Sent: Wednesday, November 16, 2005 11:41 AM To: knitti Cc: Julian Smith; misc@openbsd.org Subject: Re: Filesystem redundancy This is actually pretty common believe

Re: Filesystem redundancy

2005-11-16 Thread Tobias Weingartner
On Wednesday, November 16, Will H. Backman wrote: Maybe OpenBSD can merge with OpenVMS, which should be easy given that four of the letters are already the same. OpenVMS has some amazing clustering capabilities. It's actually 5 letters... and if *you* can't even get that much right, how the

Re: Filesystem redundancy

2005-11-16 Thread Joachim Schipper
On Wed, Nov 16, 2005 at 02:01:01PM +0100, Per-Erik Persson wrote: AFS would handle your storage in a redundant and distributed way where you easily can add and remove a machine. But this is not a thing you set up in an afternoon :-) People seems to be afraid of it since it's complexity. But