> On Thu, 21 Mar 2002 08:32:37 -0800,
> David Mendenhall <[EMAIL PROTECTED]> (dm) writes:
dm> I know I've seen snippets about this run across this list, but does anybody
dm> have a step-by-step for switching from Berkeley DB to skiplist in cyrus
dm> 2.0.16 ?
For 2.0.16? I don't think yo
ch 20, 2002 7:33 PM
To: Amos Gouaux
Cc: [EMAIL PROTECTED]
Subject: Re: multiple cyruses via SAN
Amos Gouaux wrote:
><...>
>
>Though, I will say
>this: we recently switched to skiplist for mailboxes.db and at least
>so far, it beats the pants off of Berkeley DB.
>
Ditto. We s
> On Thu, 21 Mar 2002 07:40:30 +0100,
> Simon Matter <[EMAIL PROTECTED]> (sm) writes:
sm> OT, but did you upgrade all dbs from DB3 to skiplist? Is it possible at
sm> all? I'm not sure about this but as I understand the configure script it
sm> should be possible now to use skiplist for eve
Jeremy Howard schrieb:
>
> Amos Gouaux wrote:
>
> ><...>
> >
> >Though, I will say
> >this: we recently switched to skiplist for mailboxes.db and at least
> >so far, it beats the pants off of Berkeley DB.
> >
> Ditto. We switched to skiplist last week (from BDB3), and the
> performance improveme
Some random rambling on this topic. I'm not sure I'm contributing a whole
lot new.
In general, distributed filesystems are nice mechanisms for doing general
purpose stuff. However, when you try to layer very specific tasks on top
of distributed filesystem, you may run into problems where you
Amos Gouaux wrote:
><...>
>
>Though, I will say
>this: we recently switched to skiplist for mailboxes.db and at least
>so far, it beats the pants off of Berkeley DB.
>
Ditto. We switched to skiplist last week (from BDB3), and the
performance improvement is amazing! Plus of course, no more deadlo
> On Wed, 20 Mar 2002 10:40:20 +0100,
> Birger Toedtmann <[EMAIL PROTECTED]> (bt) writes:
bt> If you want a production system that scales and is high available/has failover
bt> capablilities, set up several boxes with _separate_ userspace and multiplex
bt> all connections to and from it
[EMAIL PROTECTED] schrieb am Wed, Mar 20, 2002 at 10:11:26AM +0200:
>
> So guys, what do you suggest in theorethical level?
> What would have to be done for multiple cyruses to work? Put a SQL DB in
> backend?
I just won't do it. The technology at hand is definitely not in shape for
this if you
>
> The Cyrus code already handles the locking between multiple processes,
> so an imapd running on a different box is a subtle (if any)
> difference,
> provided that the shared filesystem handles read/write access from
> multiple hosts and provides UNIX file locking semantics.
>
> The only fil
EMAIL PROTECTED]>, <[EMAIL PROTECTED]>
|
| Subject: Re: multiple cyruses via SAN
|
>---
On Tue, 19 Mar 2002, Ken Murchison wrote:
>
>
> Chris Audley wrote:
> >
> > No, it will not work. A shared file system with unix lock semantics is
> > not enough, Berkeley DB will not work in this environment because it
> > uses shared memory. The system is single host bound.
>
> Yup. Good ca
Chris Audley wrote:
>
> No, it will not work. A shared file system with unix lock semantics is
> not enough, Berkeley DB will not work in this environment because it
> uses shared memory. The system is single host bound.
Yup. Good call. This could be worked around or just use non-BDB
cyrus
Hmm,
I think there's a way to persuade berkeleydb to work without shm. Not sure
tho
-alex
On Tue, 19 Mar 2002, Chris Audley wrote:
> No, it will not work. A shared file system with unix lock semantics is
> not enough, Berkeley DB will not work in this environment because it
> uses shar
No, it will not work. A shared file system with unix lock semantics is
not enough, Berkeley DB will not work in this environment because it
uses shared memory. The system is single host bound.
Cheers
Chris
[EMAIL PROTECTED] wrote:
>So you think if i simply had cxfs, it would work w/o proble
|
> | To: [EMAIL PROTECTED]
> |
> | cc:
>
|
| cc:
|
| Subject: Re: multiple cyruses via SAN
|
>--|
Actually, it MAY just work, b
On Tue, 19 Mar 2002, Ken Murchison wrote:
> The Cyrus code already handles the locking between multiple processes,
> so an imapd running on a different box is a subtle (if any) difference,
> provided that the shared filesystem handles read/write access from
> multiple hosts and provides UNIX file
Hello,
Actually, there is no SAN server. The SAN is to be implemented
with fiber channel devices. The imap servers will have a fiber
channel interface which is connected to a fiber channel switch.
Also connected to the fiber channel switches are the RAID units
with the actual storage.
As for the
[EMAIL PROTECTED] wrote:
>
> So you think if i simply had cxfs, it would work w/o problems?
I _think_ so. I've never tried it an make no guarantees. Keep in mind
that CXFS is only available on IRIX and Solaris (and may require IRIX
servers). SGI is supposedly working on Linux, Win32 and Mac
Earl R Shannon wrote:
>
> Hello,
>
> We would like to use a shared filesystem. Will ALL the accounts on
> each server. Then we would use a load balancing package ( Resonate )
> in front of the servers. Should one server fail the service would
> continue.
>
> Networ
So you think if i simply had cxfs, it would work w/o problems?
Hello,
We would like to use a shared filesystem. Will ALL the accounts on
each server. Then we would use a load balancing package ( Resonate )
in front of the servers. Should one server fail the service would
continue.
Network
/\
On Tue, 19 Mar 2002 [EMAIL PROTECTED] wrote:
>
> Idea is that they share same mails/rules and acti simultaneously. A
> loadbalancer will stand in front of those boxes.
Its certainly something I wanted to try for a long time now. There has
been many requests for this on the list, but I'm not awa
[EMAIL PROTECTED] wrote:
>
> Here is the idea:
>
> CyrusBox1 CyrusBox2
> \ /
>`-\__/
> SAN
>
> The questions are:
> 1) Can it be done with out modifications to cyrus code?
> 2) if n
EMAIL PROTECTED]
|
| cc:
|
| Subject: Re: multiple
--On Tuesday, March 19, 2002 6:29 PM +0200 [EMAIL PROTECTED]
wrote:
> Here is the idea:
>
>
>
> CyrusBox1 CyrusBox2
> \ /
>`-\__/
> SAN
>
>
>
> The questions are:
> 1) Can it be done
Here is the idea:
CyrusBox1 CyrusBox2
\ /
`-\__/
SAN
The questions are:
1) Can it be done with out modifications to cyrus code?
2) if not, what has to be done
3) perhaps someone wou
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