Hello, We are running Red Hat Enterprise Linux AS release 4 (Nahant Update 4) with OCFS2 for our mail servers. There are three nodes in the cluster with shared storage and OCFS2 filesystem on it. The filesystem is used for mail storage(using Maildir layout) and is accessed by smtpd, pop3 and imap processes(DOVECOT). The system works fine but when there are mailing lists the load increases dramatically. It only occurs when there are mailing lists. We have tested it in lab with good results and now in production we are having some load problems caused by dovecot´s deliver process.
In lab we had sent lots of mails but always to a few accounts. It was OK. Now there are sent less mails but there are more accounts. The load increases until it reaches about 100 and only restart fixes the problem. The umounting of the OCFS2 filesystem is not possible even when all process accessing it are killed. Any suggestions? TIA
Info:
Three nodes. OS: Red Hat Enterprise Linux AS release 4 (Nahant Update 4) Mailbox format: Maildir SMTP daemon: Dovecot deliver + Sendmail OCFS2 version: 1.2.5-6 Kernel Version: 2.6.9-42.0.10.ELsmp Pop3 and imap daemon: Dovecot 1.0.3
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Jon Blázquez Diez jblazquez@unav.es Servicios Informáticos https://www.unav.es/SI/ Universidad de Navarra https://www.unav.es