The zap is really speedy when it comes to file lookups in a
directory. If you're really concerned about performance, and
depending on your system you're running on, I'd probably recommend
staying below 10 million or so files per directory. Just since you'll
get fastest results when we can fit most of zap blocks in the ARC as
opposed to having to go and fetch them from disk.
*(disclaimer: this was a benchmark i ran on bits from February on an
opteron box with 3 GB of memory with a single scsi disk in the pool.
So you may want to rerun with current bits for better numbers if this
is very important to you expect to be storing millions of files per
directory on a regular basis).
You can also go nuts on creating filesystems. I believe the only
thing to be forewarned of is that upon reboot, you'll be mounting all
these filesystems so this might slow down the reboot process somewhat
when you get to *many thousands(due to the way the automounter
behaves). I believe that a fix is being worked on (may already be
back? ) to make this process much quicker, however I'm not sure.
Anybody know what the status of that is?
Noel
On Oct 15, 2006, at 11:08 PM, Ramneek Sethi wrote:
Thanks for your feedback.. any comments on VxFS..
Also is there any limit of files within filesystem or within directory
for optimal performance..
Thanks
Robert Milkowski wrote On 10/14/06 04:19,:
Hello Ramneek,
Friday, October 13, 2006, 6:07:22 PM, you wrote:
RS> Hello Experts
RS> Would appreciate if somebody can comment on sendmail
environment on
RS> solaris 10.
RS> How will Zfs perform if one has millions of files in sendmail
message
RS> store directory under zfs filesystem compared to UFS or VxFS..
Actually not sendmail but also MTA and
ZFS is about 5% better in real production than UFS+SVM.
--
Thanks & Regards,
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