I guess I don't have such a high load so I will try Peer's recomendation about using PostLoginScripting first and measure the impact. I will try the log monitoring technique if the impact is significant. Thank you very much.
El 29.04.2013 13:47, Robert Schetterer escribió:
Am 29.04.2013 18:23, schrieb Peer Heinlein:
Am 29.04.2013 18:01, schrieb Robert Schetterer:
doing touch method may slow down your i.e cluster filesystem, database etc specially with high frequent logins, related how/what you need such timestamps you can get them from logs too, to get an idea If a system's breaking down by touching one file per login this system should never host users, that receive more then 20 mails per day.
please read and understand what "high frequent logins" means, i am talking about i.e 2000 pop3 tls logins per second
EVERY single stupid e-mail generates MUCH more I/O then touching last-login. Every log line generates as much I/O, als touching this file.
dont tell ,instead measure ,try i.e with high pop3 rates on drbd ocfs2 cluster and maildir Anyway, I never believed that cluster filesystems are a usable storage system for mailservers. I d
i have that up and running and many others have too, we done tests about different filesystems if done right , its an absolut working power solution elieving is not part of dovecot *g But, sure, your way with cron saves some I/O, that's right.
its not meant to be the holy grail, but may use as simple workaround everyone needs to have logs ( i.e in big setups you hav> , ldap logins , change dovecot config etc " style="padding-left:5px; border-left:#1010ff 2px solid; margin-left:5px; width:100%">I just remembered, that in our LDAP-lastlogin-script we simply built in a check that READ lastlogin befor updating it and that just updated lastlogin, if lastlogin differs from the actual date. In that case every user generates just one LDAP-write per day, which was quite okay.
i did not say y> pe="cite" style="padding-left:5px; border-left:#1010ff 2px solid; margin-left:5px; width:100%">Peer - Heinlein Support GmbH Schwedter Str. 8/9b, 10119 Berlin http://www.heinlein-support.de [1] Tel: 030 / 405051-42 Fax: 030 / 405051-19 Zw t. §35a GmbHG: HRB 93818 B / Amtsgericht Berlin-Charlottenburg, Geschäftsführer: Peer Heinlein -- Sitz: Berlin
Best Regards MfG Robert Schetterer
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