Hi there I'm new to LVM2 and am considering using it on a production system, but would welcome advice from experienced users out there, before I set things up. Your advice and comments would be appreciated. Details follow. Summary: Primary function: mail system (pop3,smtp,http) Scalable to 10's of thousands (and hopefully millions) of users ;-) Applications: qmail, PostgreSQL, djbdns Current system: 1GB RAM 4x U320 15k SCSI 72GB disks in hardware RAID1+0 All functions running on same host. Future system to include external drive cage(s) and splitting of functions onto separate hosts (DB/mail/DNS). The external drive cage(s) to be used for mail storage. qmail uses maildir, as opposed to mbox delivery, so each message is a separate file... this means I require performance for a vastly greater number of smaller files as opposed to a single mbox file per user. Another consideration is a popular belief that mounting /var/qmail/queue with the sync option set, or manually invoking sync() improves the queue's robustness (that's another story). At the moment the box has: / 520MB ext3 /boot 32MB ext3 free +/-130GB LVM There's a swap partition, but otherwise the rest is available. I'm considering something approximating the following. / 520MB ext3 /boot 32MB ext3 /usr 512MB LVM/ext3 /var 1GB LVM/ext3 /var/lib/pgsql 512MB LVM/ext3 /var/qmail/queue 512MB LVM/ext3 sync /home 1GB LVM/ext3 /home/mail 127GB+ LVM/ext3 All the file systems on LVs may require expansion/contraction as the system grows, so I'd like as flexible a setup as possible. The qmail queue should probably be larger, rather than smaller, so that expansion doesn't adversely affect performance. What about adding swap space? What size should the various PEs be, linear/striped?... what other configurable LVM settings would suit this setup etc. I'm a complete newbie as far as LVM is concerned, so need valuable pointers. The primary goal here is for flexibility and I/O performance - the hardware RAID takes care of availability/redundancy, together with backup media. Thanks in advance Dale _______________________________________________ linux-lvm mailing list linux-lvm@sistina.com http://lists.sistina.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
