Manoj Nayak writes:
Hi All.
ZFS document says ZFS schedules it's I/O in such way that it manages to
saturate a single disk bandwidth using enough concurrent 128K I/O.
The no of concurrent I/O is decided by vq_max_pending.The default value
for vq_max_pending is 35.
We have
Roch - PAE wrote:
Manoj Nayak writes:
Hi All.
ZFS document says ZFS schedules it's I/O in such way that it manages to
saturate a single disk bandwidth using enough concurrent 128K I/O.
The no of concurrent I/O is decided by vq_max_pending.The default value
for
On Jan 23, 2008 6:36 AM, Manoj Nayak [EMAIL PROTECTED] wrote:
It means 4-disk raid-z group inside ZFS pool is exported to ZFS as a
single device ( vdev ) .ZFS assigns vq_max_pending value of 35 to this vdev.
To get higher throughput , I need to do following things ?
1.Reduce no of disks in
Manoj Nayak wrote:
Roch - PAE wrote:
Manoj Nayak writes:
Hi All.
ZFS document says ZFS schedules it's I/O in such way that it manages to
saturate a single disk bandwidth using enough concurrent 128K I/O.
The no of concurrent I/O is decided by vq_max_pending.The default
Hi All.
ZFS document says ZFS schedules it's I/O in such way that it manages to
saturate a single disk bandwidth using enough concurrent 128K I/O.
The no of concurrent I/O is decided by vq_max_pending.The default value
for vq_max_pending is 35.
We have created 4-disk raid-z group inside ZFS
Manoj Nayak wrote:
Hi All.
ZFS document says ZFS schedules it's I/O in such way that it manages to
saturate a single disk bandwidth using enough concurrent 128K I/O.
The no of concurrent I/O is decided by vq_max_pending.The default value
for vq_max_pending is 35.
We have created 4-disk
Manoj Nayak wrote:
Hi All.
ZFS document says ZFS schedules it's I/O in such way that it manages to
saturate a single disk bandwidth using enough concurrent 128K I/O.
The no of concurrent I/O is decided by vq_max_pending.The default value
for vq_max_pending is 35.
We have created
manoj nayak wrote:
Manoj Nayak wrote:
Hi All.
ZFS document says ZFS schedules it's I/O in such way that it manages
to saturate a single disk bandwidth using enough concurrent 128K I/O.
The no of concurrent I/O is decided by vq_max_pending.The default
value for vq_max_pending is 35.
manoj nayak wrote:
- Original Message - From: Richard Elling
[EMAIL PROTECTED]
To: manoj nayak [EMAIL PROTECTED]
Cc: zfs-discuss@opensolaris.org
Sent: Wednesday, January 23, 2008 7:20 AM
Subject: Re: [zfs-discuss] ZFS vq_max_pending value ?
manoj nayak wrote:
Manoj Nayak wrote
4 disk raidz group issues 128k/3=42.6k io to each individual data
disk.If 35 concurrent 128k IO is enough to saturate a disk( vdev ) ,
then 35*3=105 concurrent 42k io will be required to saturates the
same disk.
ZFS doesn't know anything about disk saturation. It will send
up to
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