On Mar 6, 2010, at 1:38 AM, Zhu Han wrote:
> On Sat, Mar 6, 2010 at 12:50 PM, Erik Trimble wrote:
> This is true. SSDs and HDs differ little in their ability to handle raw
> throughput. However, we often still see problems in ZFS associated with
> periodic system "pauses" where ZFS effectively
On Sat, Mar 6, 2010 at 12:50 PM, Erik Trimble wrote:
> This is true. SSDs and HDs differ little in their ability to handle raw
> throughput. However, we often still see problems in ZFS associated with
> periodic system "pauses" where ZFS effectively monopolizes the HDs to write
> out it's curren
[moved off osol-discuss]
Zhu Han wrote:
Hi, Erik,
I've always wondered what the benefit (and difficulty to add to
ZFS) would be to having an async write cache for ZFS - that is,
ZFS currently buffers async writes in RAM, until it decides to
aggregate enough of them to flush to d
In this email, when I say PERC, I really mean either a PERC, or any other
hardware WriteBack buffered raid controller with BBU.
For future server purchases, I want to know which is faster: (a) A bunch of
hard disks with PERC and WriteBack enabled, or (b) A bunch of hard disks,
plus one SSD for
