From: "Mark Crispin" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Cc: <[EMAIL PROTECTED]> Sent: Thursday, July 08, 2004 11:00 AM Subject: Re: File Locking
> On Thu, 8 Jul 2004 [EMAIL PROTECTED] wrote: > > I may be revealing my ignorance again, but I think we were using > > qpopper before we even decided to use IMAP at all, that had problems over > > NFS because it locks, makes a copy and if you are saving messages on the > > server copies it back. All that happening over NFS doubled our I/O > > requirements. cucipop doesn't make a copy so we began to use it. Shortly > > thereafter we decided to also include IMAP access to "reduce POP I/O > > traffic" and now IMAP access has become a value-added service. > > It sounds to me as if you folks are thrashing about trying different > things to see what will work, but for some reason have chosen to ignore > (or reject) advice from sites which have made things work. That pretty much sums it up and really you are preaching to the choir here. Those were the answers I was looking for and you couldn't have put it in any better words than you did below. Thanks for your help. > In my opinion, your fundamental system architecture is fatally flawed; and > you are doomed to repeat this thrashing until you change the architecture > to one that is not so flawed. > > Quite frankly, you would be better off than you are now if you got rid of > all those CPUs and running everything on what is now the NFS server. You > are not gaining any benefit from the additional CPUs, and the introduction > of NFS significantly hurts matters. I doubt very much that Lustre will > remedy the NFS issues, much less address the fundamental flaws in the > architecture. > > > I'll have to look in to ipop3d. Does it make a temporary working copy, and > > then write back to the mbox when it is done? > > No. > > > does it have a mailing list on which it would be more appropriate to discuss > > these things? > > Perhaps the [EMAIL PROTECTED] mailing list. > > -- Mark -- > > http://staff.washington.edu/mrc > Science does not emerge from voting, party politics, or public debate. > Si vis pacem, para bellum. >
