I'll attempt to answer my own question and welcome
comments. Especially if this post could mislead anyone.
I've surveyed a single system where I'm piloting 50 users. The
approximate space used and percentages I computed are below. I expect
these users (a mix of faculty,staff and students) to represent what my
production system will be like:
* /opt/zimbra 2G 8%
* /opt/zimbra/store 7G 27%
* /opt/zimbra/db 1G 4%
* /opt/zimbra/backup 16G 57%
* /opt/zimbra/index 500M 2%
* /opt/zimbra/redolog 15M 1%
* /opt/zimbra/log 160M 1%
I applied these percentages back to my available space (3TB) for
production. It wasn't a direct application of the percentages for the
following reasons:
* I didn't scale /opt/zimbra itself since the directories I expect to
grow will be the separate partitions listed above.
* I rounded up to the nearest 1%.
* The pilot system is using a single disk so I differed for SATA vs
fiber and different RAID numbers where applicable.
* The above didn't take HSM into account so my store is much smaller
but there's plenty on the HSM SATA volume. I plan to HSM as low as
every 14 or perhaps even 7 days.
* My backup is a little short but is actually made of three 500G
disks LVM'd together. I can add these more cheaply and add them to
the LVM in the future, presumably before HSM fills up. I also have
the option of backing up each week, not every two weeks.
With all this in mind I've come up with the following:
20G /opt/zimbra
30G /opt/zimbra/log
30G /opt/zimbra/redolog
60G /opt/zimbra/index
120G /opt/zimbra/db
380G /opt/zimbra/store
980G /opt/zimbra/hsm
1600G /opt/zimbra/backup
Please let me know if you see problems with the above.
Thanks,
John  |