Re: [zfs-discuss] ZFS configuration and performance questions.

2008-08-11 Thread Bob Friesenhahn
On Mon, 11 Aug 2008, Martin Svensson wrote: > > Granted, the simple striped configuration is fast, and of course > with no redundancy. But I don't understand how a mirrored > configuration can perform as good when you sacrifice half of your > disks for redundancy. Doesn't a mirror perform as one

Re: [zfs-discuss] ZFS configuration and performance questions.

2008-08-11 Thread Tomas Ögren
On 11 August, 2008 - Martin Svensson sent me these 0,9K bytes: > I read this (http://blogs.sun.com/roch/entry/when_to_and_not_to) blog > regarding when and when not to use raidz. There is an example of a plain > striped configuration and a mirror configuration. (See below) > > M refers to a 2-w

Re: [zfs-discuss] ZFS configuration and performance questions.

2008-08-11 Thread Mario Goebbels (iPhone)
Diskspace may be lost on redundacy, but there's still two or more devices in the mirror. Read requests can be spread across these. -- Via iPhone 3G On 11-août-08, at 11:07, Martin Svensson <[EMAIL PROTECTED] m> wrote: > I read this (http://blogs.sun.com/roch/entry/when_to_and_not_to) > blog

Re: [zfs-discuss] ZFS configuration and performance questions.

2008-08-11 Thread Martin Svensson
I read this (http://blogs.sun.com/roch/entry/when_to_and_not_to) blog regarding when and when not to use raidz. There is an example of a plain striped configuration and a mirror configuration. (See below) M refers to a 2-way mirror and S to a simple dynamic stripe. Config Blocks Available

Re: [zfs-discuss] ZFS configuration and performance questions.

2008-08-11 Thread Tomas Ögren
On 10 August, 2008 - Martin Svensson sent me these 0,9K bytes: > Hello! I'm new to ZFS and have some configuration questions. > > What's the difference, performance wise, in below configurations? > * In the first configuration, can I loose 1 disk? Yes. > And, are the disks striped to gain perfo

[zfs-discuss] ZFS configuration and performance questions.

2008-08-10 Thread Martin Svensson
Hello! I'm new to ZFS and have some configuration questions. What's the difference, performance wise, in below configurations? * In the first configuration, can I loose 1 disk? And, are the disks striped to gain performance, as they act as one vdev? * In the second configuration, can I loose 2 d