Linked by Rahul on Mon 13th Oct 2008 21:19 UTC
Linux Foundation is organizing a end user collaboration summit this week. A major topic will be a presentation on the new upcoming filesystems - Ext4 and Btrfs. Ted Tso, who is a Linux kernel filesystem developer on a sabbatical from IBM working for Linux Foundation for a year, has talked about the two-pronged approach for the Linux kernel, taking a incremental approach with Ext4 while simultaneously working on the next generation filesystem called btrfs. Read more for details.
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Member since:
2005-07-07
Ok. So from the articles, we can say that ZFS scales all the way down to 4GB of memory and an AMD Athlon X2 BE-2350 dual core processor running in 64 bit mode. "
No, People are running ZFS on 512MB boxes. People are also running them in VMWare VMs. Zfs-on-FUSE is used on linux there are numerous articles if you search.
People put a boatload of memory because ZFS performs best when it can cache a lot. I fail to see how you can misconstrue that to mean it needs a lot of memory. Less memory won't give you the best throughput.
http://www.opensolaris.org/jive/thread.jspa?threadID=73990&tstart=-...
There are posts here where people having been using ZFS with 512MB.
"My home ZFS server runs with only 1 GB of RAM. It achieves 430 MB/s sequential
reads and 220 MB/s writes. This is very good, given that its primary task is
to serve large files over NFS."
"speed" is another vague term. Do you mean throughput, or latency. Local I/O,
or over NFS. Etc. FYI a small amount of RAM usually impacts random I/O
workloads when they would otherwise fit in memory, but does not reduce the
throughput of sequential I/O because prefetching algorithms work just fine as
all they need is a few tens of MB of memory.
..........
As a matter of fact, until march 2008 I had been running snv_55b for over a
year with only 512 MB to serve a 2.0-TB pool over NFS. Again, the performances
(throughput) were very acceptable. If that's what the OP needs, then 512 MB
would be *technically* sufficient, even if given the current prices 1 GB would
make more sense.
-marc
"