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2015 Feb 03
4
Hitting wall at 2048 IMAP connections
We are gradually rolling out Dovecot (IMAP only, no POP3) to our customer base. We are replicating between a pair of CentOS 7 boxes. All has been working wonderfully. However, to be sure our rollout continues to go smoothly, we put together a simple benchmark client program to fire up X persistent IMAP connections (using hundreds of mailboxes) that login, list the folders, select the