[zfs-discuss] Different size / manufacturer L2ARC

2012-09-26 Thread Matt Van Mater
I've looked on the mailing list (the evil tuning wikis are down) and haven't seen a reference to this seemingly simple question... I have two OCZ Vertex 4 SSDs acting as L2ARC. I have a spare Crucial SSD (about 1.5 years old) that isn't getting much use and i'm curious about adding it to the

Re: [zfs-discuss] Different size / manufacturer L2ARC

2012-09-26 Thread Sašo Kiselkov
On 09/26/2012 05:08 PM, Matt Van Mater wrote: I've looked on the mailing list (the evil tuning wikis are down) and haven't seen a reference to this seemingly simple question... I have two OCZ Vertex 4 SSDs acting as L2ARC. I have a spare Crucial SSD (about 1.5 years old) that isn't getting

Re: [zfs-discuss] Different size / manufacturer L2ARC

2012-09-26 Thread Matt Van Mater
If the added device is slower, you will experience a slight drop in per-op performance, however, if your working set needs another SSD, overall it might improve your throughput (as the cache hit ratio will increase). Thanks for your fast reply! I think I know the answer to this question,

Re: [zfs-discuss] Different size / manufacturer L2ARC

2012-09-26 Thread Sašo Kiselkov
On 09/26/2012 05:18 PM, Matt Van Mater wrote: If the added device is slower, you will experience a slight drop in per-op performance, however, if your working set needs another SSD, overall it might improve your throughput (as the cache hit ratio will increase). Thanks for your fast

Re: [zfs-discuss] Different size / manufacturer L2ARC

2012-09-26 Thread Dan Swartzendruber
On 9/26/2012 11:18 AM, Matt Van Mater wrote: If the added device is slower, you will experience a slight drop in per-op performance, however, if your working set needs another SSD, overall it might improve your throughput (as the cache hit ratio will increase). Thanks for your

Re: [zfs-discuss] Different size / manufacturer L2ARC

2012-09-26 Thread Matt Van Mater
Excellent thanks to you both. I knew of both those methods and wanted to make sure i wasn't missing something! On Wed, Sep 26, 2012 at 11:21 AM, Dan Swartzendruber dswa...@druber.comwrote: ** On 9/26/2012 11:18 AM, Matt Van Mater wrote: If the added device is slower, you will experience a