On 02/23/2016 11:19 AM, Loic Dachary wrote:
Here it is http://tracker.ceph.com/issues/14842
On 23/02/2016 12:24, Somnath Roy wrote:
eph-deploy is creating data partition from sector 1 ignoring what sgdisk is recommending (256 in my disk). Basically, it should be aligned with physical sector size (reported in /sys/block/<device>/queue/physical_block_size). In my case it is 16K physical and 4K logical...256 is perfectly fine as sgdisk/fdisk internally decides.
Disk performance will be severely impacted because of partitioning this way from ceph-deploy ,
I think that more modern partition tools handle alignment better (and handle the
modern partition types) - sfdisk and parted both are better than fdisk I believe.
For RHEL & Fedora, we try hard to make sure that we use the advertised alignment
when we create a partition and default to an alignment on sector 2048 (1MB) if
it is not set by the device.
Ric
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