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seen Mar 16 at 21:14

Jun
19
comment Problems migrating ZFS pool from Openindiana build 151a7 to FreeBSD 9.1
@kworr Alright, then I understand (and feel a bit stupid)! I wasn't reading it properly and I was indeed installing 9.1 RELEASE which doesn't support zpool 5000 as you say. That answers that, thanks for your help! According to the wiki-page FreeBSD 8.2 RELEASE supports ZPOOL 5000, maybe I'll try that or just wait to the 9.2 RELEASE. Anyway, thanks again!
Jun
12
comment Problems migrating ZFS pool from Openindiana build 151a7 to FreeBSD 9.1
@kworr According to this page they should both be 5000: en.wikipedia.org/wiki/ZFS
Jun
2
comment Problems migrating ZFS pool from Openindiana build 151a7 to FreeBSD 9.1
Thanks for the quick response! Openindiana #zpool upgrade -v: 1 Initial ZFS version * * 28 Mutiple vdev replacements, FreeBSD #zpool upgrade -v: 1 Initial ZFS version * * 28 Mutiple vdev replacements. In other words, exactly the same. They should also run the same version according to the table you linked to which is why I thought it would work. I get what you're saying with sticking to the same system, but I wanted to learn more about FreeBSD but it looks like I'll be using Openindiana until I upgrade my server.
Jun
3
comment Will a SSD cache increase Native ZFS performance for me?
@netvope No problem! Yes, it's very interesting. The only "explanation" I can think off is that the hard drive was so slow it bottlenecked the ZFS code somehow, I would've most likely seen the same perfomance increase with a "regular" 7200rpm hard drive. I don't know exactly how and why but it's just a theory.
Jun
3
comment Will a SSD cache increase Native ZFS performance for me?
@netvope What actually really boosted performance was installing the OS on an SSD and the performance is now closer to 70 MB/s. When I built the server I chose a 5400 rpm hard drive because I focused on power consumption and had a tight budget.The upgrade to a SSD disk really sped up everything (Windows XP in Virtualbox, VNC, overall network performance etc.) I'm very happy with the set up now and it's been running stable since. On a side note, ZFS is also working well on Precise Pangolin, which is nice.
Jun
3
comment Will a SSD cache increase Native ZFS performance for me?
@netvope Marginally actually, also if I remember correctly there were no network drivers for the integrated network card on my motherboard which made FreeBSD a no-go. It was good to test however and I'm happy to report that the ZFS pool migrated nicely between Ubuntu and FreeBSD.
Feb
9
comment Will a SSD cache increase Native ZFS performance for me?
It's a server, I just use the desktop version of Ubuntu. I use it for file/web/ftp/time machine and iTunes.
Feb
8
comment Will a SSD cache increase Native ZFS performance for me?
Your points are valid but I did a couple of tests before going with Ubuntu and native ZFS. I created a ZFS pool with native ZFS and successfully imported the pool to FreeNAS and FreeBSD using both Virtualbox with raw disk access and a full OS installation. I keep a drive separate for the OS so I could do these things quite easily. That made me confident enough to use native ZFS and I concluded that ZFS is ZFS, no matter what OS you're using. I'm gonna give FreeBSD a try though and see what I can learn.
Feb
8
comment Will a SSD cache increase Native ZFS performance for me?
So I'm thinking plenty of room for optimization :). No, I see what you mean and after some testing the short answer to the question in my heading is "no". I think I'm going to give FreeBSD a go, and hopefully VirtualBox will be stable enough for Windows XP and iTunes.
Feb
7
comment Will a SSD cache increase Native ZFS performance for me?
Confused about whether or not I can improve performance that is, not why I am using ZFS in the first place.
Feb
7
comment Will a SSD cache increase Native ZFS performance for me?
Yes, I am confused which is why I came here and asked these questions. Also I know that the RAM isn't used for the ZIL, I simply asked if putting the ZIL on a SSD would improve performance in my case. I chose ZFS primarily for the data integrity, so I wanna use ZFS. I have my reasons so please don't question them. You're answer is very helpful though and i appreciate that!
Feb
7
comment Will a SSD cache increase Native ZFS performance for me?
Thanks for the feedback! However I am using ZFS natively within the kernel (and not the FUSE implementation) as described on zfsonlinux.org since I didn't want to use ZFS in the userspace because of the performance issues. I'll run a few tests with the ZIL disabled and have a look at the iostat. Thanks again for the pointers!
Nov
16
comment Native ZFS doesn't free up space when deleting files
No, I don't have any snapshots or compression on that particular dataset but I've found the solution so I'll answer my own question. Thank you for your help though!