Re: [ceph-users] What's the difference between using /dev/sdb and /dev/sdb1 as osd?

2014-03-22 Thread Kyle Bader 
 If I want to use a disk dedicated for osd, can I just use something like
 /dev/sdb instead of /dev/sdb1? Is there any negative impact on performance?

You can pass /dev/sdb to ceph-disk-prepare and it will create two
partitions, one for the journal (raw partition) and one for the data
volume (defaults to formatting xfs). This is known as a single device
OSD, in contrast with a multi-device OSD where the journal is on a
completely different device (like a partition on a shared journaling
SSD).

-- 

Kyle
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[ceph-users] What's the difference between using /dev/sdb and /dev/sdb1 as osd?

2014-03-21 Thread Jianing Yang 

If I want to use a disk dedicated for osd, can I just use something like
/dev/sdb instead of /dev/sdb1? Is there any negative impact on performance?

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