Bruce
03-08-2011, 01:40 PM
What: IMAP server software switching from Courier to Dovecot
When: March 9th 2011
Window: 11PM to 12AM
Who: Users of IMAP on PT06
Impact: All sites will be migrated to the new software. No downtime is anticipated.
The server software responsible for IMAP access on the POP toasters is being switched from Courier IMAP (http://www.courier-mta.org/imap/) to Dovecot (http://www.dovecot.org/). Dovecot is a much more efficient implementation of the IMAP protocol, and promises to support more standard IMAP features.
This change is being implemented due to resource problems with the Courier IMAP software. Courier makes use of very few indexes, and as such certain common search operations occasionally cause major resource consumption on the POP toasters.
While the indices used by Courier and Dovecot do differ, the switch is set up such that the necessary indexes will be automatically converted the first time a mailbox is accessed by IMAP. This process is nearly instantaneous, so no downtime should be observed.
During the switch to Dovecot on PT01, we discovered two minor issues. Both have been corrected but to avoid wider scale undiscovered issues, we are extending the first phase of conversion. Once we are satisfied that no problems remain from the switch, all remaining POP toasters will be switched over.
To determine what POP Toaster your package uses login to your CNC and click on the Server Info link:
http://www.FutureQuest.net/GoToCNC/
Note: This is an Advisory Notice Only. No action on the part of site owners will be required.
When: March 9th 2011
Window: 11PM to 12AM
Who: Users of IMAP on PT06
Impact: All sites will be migrated to the new software. No downtime is anticipated.
The server software responsible for IMAP access on the POP toasters is being switched from Courier IMAP (http://www.courier-mta.org/imap/) to Dovecot (http://www.dovecot.org/). Dovecot is a much more efficient implementation of the IMAP protocol, and promises to support more standard IMAP features.
This change is being implemented due to resource problems with the Courier IMAP software. Courier makes use of very few indexes, and as such certain common search operations occasionally cause major resource consumption on the POP toasters.
While the indices used by Courier and Dovecot do differ, the switch is set up such that the necessary indexes will be automatically converted the first time a mailbox is accessed by IMAP. This process is nearly instantaneous, so no downtime should be observed.
During the switch to Dovecot on PT01, we discovered two minor issues. Both have been corrected but to avoid wider scale undiscovered issues, we are extending the first phase of conversion. Once we are satisfied that no problems remain from the switch, all remaining POP toasters will be switched over.
To determine what POP Toaster your package uses login to your CNC and click on the Server Info link:
http://www.FutureQuest.net/GoToCNC/
Note: This is an Advisory Notice Only. No action on the part of site owners will be required.