Mark Hannessen wrote: > On Monday 20 December 2004 23:25, you wrote: > > Hi Mark, > > > > I'm looking for information as to how to convert from BDB4 to skiplist. > > well, I don't have any real info or tools...
I used cvt_cyrusdb to convert my mailboxes.db and per-user .seen files to skiplist. There was no need to copy any mail. > I only had 4 mail adresses at that time so I just copied all the mail using > imap from my old to the new server. might be doable with 50 clients as > well... though it is very braindead. suppose you could also write a script in > perl to do it for you. > > > I've finished with a new install of SASL, Cyrus IMAP, Postfix, MySQL, > > Web-Cyradm. I followed a how-to doc from Luc de Louw > > (www.web-cyradm.org). I've got the install completed and am in > > authentication testing phase. It looks like things are running ok. > > Recently, I've been paying attention to Berkeley DB complaints on the > > Cyrus mailing lists. Frankly, they have me concerned. The mail server > > I'm creating will be a corporate production mail server, but only > > serving 50 clients and 80GB of mail storage. I thought now would be a > > good time to possibly convert to skiplist before I populate the mail > > server. > > > > Can you point me to any docs on how to accomplish this? Does it mean > > recompiling SASL and IMAP, or is a config file change? > > I added the following to my imapd.conf > > annotation_db: skiplist > duplicate_db: skiplist > mboxlist_db: skiplist > ptscache_db: skiplist > quota_db: skiplist > seenstate_db: skiplist > subscription_db: skiplist > tlscache_db: skiplist > > this will make sure everything will be stored in skiplist databases. > > > Pardon my > > ignorance, but what is skiplist? I'm having a hard time researching > > because I don't know much about it. > > I don't have any real knowledge about skiplist other then that it is a > database backend that seems to be used exclusively by cyrus imap. > > > Any help is greatly appreciated. > > > > Thanks, > > > > Mark Butscher > > > > Mark Hannessen wrote: > > > lol, so this thread is still running.. > > > been a while since I started it. > > > > > > I must say i am very pleased with skiplist, I have simulated a few > > > hunderd crashes and it was able to recover every time. with db4 I had to > > > pray for a succesfull restart or lose all my mail. (not kidding) > > > > > > the reason I switched to linux wasn't speed... because speed is cheap. > > > > > > it was stability and security. > > > > > > I think that in general people with few users won't care about the little > > > random seek speed gain from db4, and people with many many many users > > > would like to go to sleep at night, knowing that when they wake up there > > > cyrus server is still having a good time handing mail over to users. > > > > > > I am not a technical dude, skiplist might be plain ugly, but from my > > > perspective it works at what it is supposed to do. db4 fails that > > > purpose. > > > > > > If I had to choose, skiplist would be the default a not db4. think about > > > the bad impression it gives when new users see cyrus imap destroy all > > > there mail before there eyes while doing a simple cyrus reboot. you would > > > lose all faith in that product and switch to another one right? > > > > > > And the worst thing it that this isn't needed at all. > > > cyrus is a good product. but people won't use it if they can't see that. > > > > > > regards from a happy cyrus user, > > > > > > Mark Hannessen > > > > > > On Friday 10 December 2004 13:18, you wrote: > > >>Michael Sims wrote: > > >>>Denny Schierz wrote: > > >>>>Am Montag, den 22.11.2004, 22:51 +0000 schrieb Mark Hannessen: > > >>>>>I am really wondering about this because I just can't seem to get > > >>>>>db4 to run stable. > > >>>> > > >>>>same problem here. I have to delete once a week all db's (but > > >>>>mailboxes.db). Otherwise i have timeouts and bouncing mails :-/ > > >>> > > >>>Seriously, why don't you guys switch to skiplist and avoid the whole > > >>>Berkeley DB mess? I switched to skiplist for mailboxes.db, deliver.db, > > >>>and the seen databases (on 2.1.x) about a year and a half ago and > > >>> haven't had a problem since. Berkeley DB > > >> > > >>Same here. Switched a year ago and not a worry in the world. > > >>The only difference is that I'm using deliver with db3-nosync (as with > > >>the tls_sessions) and the subscribed folders databases are flat files. > > >>The rest is all skiplist. > > >> > > >>>may perform better in some situations, but IMHO it's not worth the > > >>> hassle it brings. YMMV... > > >> > > >>Regards > > > > > > --- > > > Cyrus Home Page: http://asg.web.cmu.edu/cyrus > > > Cyrus Wiki/FAQ: http://cyruswiki.andrew.cmu.edu > > > List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html > --- > Cyrus Home Page: http://asg.web.cmu.edu/cyrus > Cyrus Wiki/FAQ: http://cyruswiki.andrew.cmu.edu > List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html Bye, Henk -- Henk Roose - [EMAIL PROTECTED] CWI - Centrum voor Wiskunde en Informatica Centre for Mathematics and Computer Science Amsterdam (NL) --- Cyrus Home Page: http://asg.web.cmu.edu/cyrus Cyrus Wiki/FAQ: http://cyruswiki.andrew.cmu.edu List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html
