@ross
"If the write doesn't span the whole stripe width then there is a read
of the parity chunk, write of the block and a write of the parity
chunk which is the write hole penalty/vulnerability, and is 3
operations (if the data spans more then 1 chunk then it is written in
parallel so you can thi
On Dec 29, 2009, at 5:37 PM, Brad wrote:
Hi! I'm attempting to understand the pros/cons between raid5 and
raidz after running into a performance issue with Oracle on zfs (http://opensolaris.org/jive/thread.jspa?threadID=120703&tstart=0
).
I would appreciate some feedback on what I've und
On Tue, Dec 29, 2009 at 02:37:20PM -0800, Brad wrote:
> I would appreciate some feedback on what I've understood so far:
>
> WRITES
>
> raid5 - A FS block is written on a single disk (or multiple disks
depending on size data???)
There is no direct relationship between a filesystem and the RAID
s
Hi! I'm attempting to understand the pros/cons between raid5 and raidz after
running into a performance issue with Oracle on zfs
(http://opensolaris.org/jive/thread.jspa?threadID=120703&tstart=0).
I would appreciate some feedback on what I've understood so far:
WRITES
raid5 - A FS block is
