Re: [zfs-discuss] How can I copy a ZFS filesystem back and forth

2012-12-03 Thread Chris Nagele
> original and and rename the new one, or zfs send or ?? Can I do a send and > receive into a filesystem with attributes set as I want or does the receive > keep the same attributes as well? Thank you. That will work. Just create the new filesystem with the attributes you want and send/recv the la

Re: [zfs-discuss] ARC de-allocation with large ram

2012-10-22 Thread Chris Nagele
> If after it decreases in size it stays there it might be similar to: > > 7111576 arc shrinks in the absence of memory pressure After it dropped, it did build back up. Today is the first day that these servers are working under real production load and it is looking much better. arcstat i

[zfs-discuss] ARC de-allocation with large ram

2012-10-20 Thread Chris Nagele
Hi. We're running OmniOS as a ZFS storage server. For some reason, our arc cache will grow to a certain point, then suddenly drops. I used arcstat to catch it in action, but I was not able to capture what else was going on in the system at the time. I'll do that next. read hits miss hit% l2rea

Re: [zfs-discuss] scripting incremental replication data streams

2012-09-12 Thread Chris Nagele
> I send a replication data stream from one host to another. (and receive). Have you looked at snapsend? http://labs.omniti.com/labs/tools/browser/trunk/snapsend.sh We've used this for a while in production for our backups and replication. We adapted it a bit so it runs every minute without ov

Re: [zfs-discuss] ZIL iops expectations

2012-08-11 Thread Chris Nagele
> This command runs with 16 threads and 8k blocks with a 2GB file: > > iozone -m -t 16 -T -O -r 8k -o -s 2G That's fair, and I realize dd is not an ideal test. I did run multiple instances of dd as well, only getting to about 8.8k iops. The reality is that no benchmark is ideal, which is why our

[zfs-discuss] ZIL iops expectations

2012-08-11 Thread Chris Nagele
Hi everyone. I posted this on the OmniOS list as well, but hoping someone here can help. We are running our final tests with our servers before we send them off to the DC. We have tested various ZIL devices, including Zeusram and DDRdrive. I wanted to get some comments on what we should expect wh