Jordan Schwartz wrote:
ZFSfolk,
Pardon the slightly offtopic post, but I figured this would be a good
forum to get some feedback.
I am looking at implementing zfs group quotas on some X4540s and
X4140/J4400s, 64GB of RAM per server, running Solaris 10 Update 8
servers with IDR143158-06.
There is one large filesystem per server that is served via NFSv3 to
linux based clients for web and email loads. There will be at least a
few thousand group quotas per filesystem.
Are there any scaling/performance issues with group based quotas?
No, this should work just fine.
For the filesystems that are already populated with thousands of
groups and terabytes of data in relatively small files, will there be
any performance impacts as the quotas are created?
If the filesystem is old (created on pool version < 15), then the first
time you do "zfs userspace <fs>" or "zfs groupspace <fs>", it will take
some time to do an initial gather of the accounting information. After
that happens, there should be no noticeable performance impact of
setting or using user or group quotas.
Also for the pre-populated filesystems will "zfs get groupsp...@$gid
$zpool/$fs" return the total usage for the group?
Yes. (Though if the filesystem is old you may need to do "zfs
groupspace" once to gather the data.)
--matt
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