Zfs on solaris 10 and home directory creation

I am using samba and a root preexec script to automatically create individual ZFS filesystem home directories with quotas on a Solaris 10 server that is a member of a Windows 2003 domain.
There are about 60,000 users in Active Directory.
My question is about best practice.
I am worried about the overhead of having 60,000 ZFS filesytems to mount and run on Solaris 10 ?
Edited by: fatfish on Apr 29, 2010 2:51 AM

Testing results as follows -
Solaris 10 10/09 running as VM on Vmware ESX server with 7 GB RAM 1 CPU 64 bit.
ZFS pool created with three 50 GB FC LUNS from our SAN (Hardware RAID5). There are shared to ESX server and presented to the Solaris VM as Raw Device Mappings (no VMFS).
I set up a simple script to create 3000 ZFS filesystem home directories
#!/usr/bin/bash
for i in {1..3000}
do
zfs create tank/users/test$i
echo "$i created"
done
The first 1000 created very quickly.
By the time I reached about 2000 each filesystem was taking almost 5 seconds to create. Way too long. I gave up after about 2500.
So I rebooted.
The 2500 ZFS filesystems mounted in about 4 seconds, so no problem there.
The problem I have is why do the ZFS file system creation time drop of and become unworkable? I tried again to add to the pool after reboot and there was the same slow creation time.
Am I better off with just one ZFS file system with 60,000 userquotas applied and lots of ordinary user home directories created under that with mkdir?

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Message Edited by erblock on 04-28-2009 12:53 AM

Zfs on solaris 10 and home directory creation

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