[hobbit] ZFS Monitoring Script

[Mike Rowell]

It's a bit of both...

ZFS is a file system type that can be applied to a raw device to create
a filesystem, however to get that you need to put the raw device into a
zfs pool which is what the software part does.

It's build directly into the kernel so operates in kernel space, but
also has a lot of dynamic qualities such as compression that can be
enabled and disabled at will, good if you've got a filesystem with a lot
of logs in it etc.

The good thing is that there is no such concept as inodes in zfs so you
can have as many files as you want without worrying about hitting inodes
maximums. 

Mike

-----Original Message-----
From: Rich Smrcina [mailto:rsmrcina at wi.rr.com] 
Sent: 12 April 2007 16:51
To: hobbit at hswn.dk
Subject: Re: [hobbit] ZFS Monitoring Script

OK, then it's a software layer above the file systems, sort of like (but

probably nothing like) LVM?

Mike Rowell wrote:
> The way ZFS works is to have storage pools, the script checks the
status
> of the storage pools which is where the ONLINE, FAULTED, DEGRADED
stuff
> comes in to it.
> 
> The capacity is just for my own information as we currently run only
one
> zfs filesystem per storage pool, as you state this isn't really needed
> as it does duplicate other things, however it gives you the ability to
> see how much storage is in a pool, you can have multiple ZFS file
> systems inside each pool so it does have it's uses.
> 
> mike
> 
> -----Original Message-----
> From: Rich Smrcina [mailto:rsmrcina at wi.rr.com] 
> Sent: 12 April 2007 16:13
> To: hobbit at hswn.dk
> Subject: Re: [hobbit] ZFS Monitoring Script
> 
> I concur, unless there's something specific that ZFS provides that is 
> critical to monitor.  This way the back end client code will be
similar 
> to (or the same as) that for Linux.
> 
> Charles Goyard wrote:
>> Hi,
>>
>> Mike Rowell wrote :
>>> File system sizes are set to alert yellow at 80% capacity and red at
>>> 90%, the variables to alter this are at the top of the file.
>> I don't know about ZFS, but are these the same kind of values "du"
>> reports ? If so, maybe it's a duplicate, or maybe you should format
> the
>> output the way "disk" does.
>>
>> Just a question/suggestion.
>>
>> Regards,
>>
> 

-- 
Rich Smrcina
VM Assist, Inc.
Phone: 414-491-6001
Ans Service:  360-715-2467
rich.smrcina at vmassist.com

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