I am new here, but got some questions. So maybe you can help me in finding out answers.
1. We are planing to use Zimbra for 5K users, 15TB (10Gb per user) space, with all Zimbra futures, mobile, outlook connectors, and etc. What type of architecture you could recommend to use. Will it be enough for good performance, use 1x1 clustering soliution, on HP DL385 G2 2,2Ghz, 4Gb RAM and HP MSA StorageWorks with RAID 1+0? If not why? What will you suggest? Service expandation?
2. Is it possible for clustering soliution to use not SAN storages? If no? Why? Is it possible some workaround?
3. If we will make some soliution, and we deside to use not 15TB, but 25Tb, will it be possible to add more?
4. Clustering soliution as we so is only active - passive. Is it possible to make active - active? Because in some of docs i've found this statement:
Future: Native Replication. Zimbra clustering can be characterized as “single copy” failover in the sense that, from perspective of ZCS, there is only a single disk image to worry about (RAID mirroring is hidden to Zimbra). The Zimbra Collaboration Suite will in the future also provides “dual copy” failover that does not rely on underlying shared disk. ZCS native replication is likely the better fit for failover across a WAN, such as for multi-site disaster recovery wherein shared network attached storage may be infeasible. Zimbra replication is also well suited to commodity server and storage hardware.
5. How about domain level qouta restriction? Is it possible? If no, when do you think to implement that?
6. Is it possible to use different COS in Domain level? For example a domain admin can create mailboxes, by differend COS.
7. Is it possible to use another Clustering method not RHEL, and still get support for Zimbra app?