Itay Menahem wrote:
> Hi,
> We're implementing ZFS on a Sun X4500. Does anyone know if Sun or other
> vendor provide a template excel-like sheet that will help us prepare the
> design of ZFS on a server system? Of course we can create one that includes
> the Pools File System properties (such as
> compression;quota;reservation;snapshots etc... )but using an exisiting
> tempate that Sun provides is a much better choice.
I've seen a few of these, but they were nothing more than spreadsheets
(even when they weren't actually spreadsheets... ugh!).
As a best practice, you should use the tools themselves rather than some
other hand-edited document which requires humans to synchronize with reality.
Useful commands are:
zpool list
zpool status
zfs list
zfs get all
For getting started, you may be used to worrying about disk placements,
controllers, etc. For the most part, this won't matter on an X4500. See:
http://blogs.sun.com/relling/entry/zfs_raid_recommendations_space_vs
ZFS can be dynamically adjusted to meet your needs over time with the following
restrictions (currently, RFEs already exist):
+ top-level vdevs cannot be removed: plan these first
+ raidz and raidz2 zpools can be expanded by adding a top-level vdev,
but you cannot add another column to a raidz and raidz2 vdev.
+ disks can be replaced with larger disks to increase available space
online, but you cannot replace a disk with a smaller disk (where
disk == LUN)
So, you will want to plan your top-level vdevs first, based on your application
needs. Since it will be nearly impossible for us to predict your requirements
and the X4500 has thousands of possible permutations, you might want to spend
some time testing before you commit to the final configuration for production.
It should be noted that the X4500 should ship with a reasonable, generic zpool
already created for you to use out of the box.
-- richard
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