Hi all,
I recently installed Nexenta Community 3.0.2 on one of my servers:
IBM eSeries X346
2.8Ghz Xeon
12GB DDR2 RAM
1 builtin BGE interface for management
4 port Intel GigE card aggregated for Data
IBM ServRAID 7k with 256MB BB Cache with (isp driver)
6 RAID0 single drive LUNS (so I can use the Cache)
1 18GB LUN for the rpool
5 300GB LUN for the data pool
1 RAIDZ1 pool from the 5 300GB drives.
4 test filesystems
1 No Dedup, No Compression
1 DeDup, No Compression
1 No DeDup, Compression
1 DeDup, Compression
This is pretty old hardware, so I wasn't expecting miracles, but I
thought I'd give it a shot.
My work load is NFS service to software build servers (cvs checkouts, un
tarring files, compiling, etc.) I'm hoping the many CVS checkout trees
will lend themselves to DeDup well, and I know source code should
compress easily.
I setup one client with a single GigE connection, mounted the four file
systems (plus one from the netapp we have here) and proceeded to write a
loop to time both un-tarring the gcc-4.3.3 sources to those 5
filesystems, and to 1 local directory, and to rm -rf the sources too.
The tar took 28 seconds and 10 seconds to remove in the local dir, then
on the first ZFS/NFS filesystem mount, it took basically forever and
hung the Nexenta server. I was watching it go on the web admin page and
it all looked fine for a while, then the client started reporting 'NFS
Server not responding, still trying...' For a while, there were Also
'NFS Server OK' messages too, and the Web GUI remained responsive.
Eventually The OK messages stopped, and the Web GUI froze.
I went an rebooted the NFS client thinking that id the requests stopped
the Server might catch up, but it never started responding again.
I was only untarring a file.. How did this bring the machine down?
I hadn't even gotten to the FS's that had SeSup or Compression turned
on, so those shouldn't have affected things - yet.
Any ideas?
-Kyle
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