This is an interesting topic that i've been waiting for.
Right now we run the journal as a partition on the data disk. I've build drives without journals and the write performance seems okay but random io performance is poor in comparison to what it should be.
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From: "Bill WONG" <wongahshuen@xxxxxxxxx>
To: "ceph-users" <ceph-users@xxxxxxxxxxxxxx>
Sent: Thursday, January 28, 2016 1:36:01 PM
Subject: SSD Journal
To: "ceph-users" <ceph-users@xxxxxxxxxxxxxx>
Sent: Thursday, January 28, 2016 1:36:01 PM
Subject: SSD Journal
Hi,
i have tested with SSD Journal with SATA, it works perfectly.. now, i am testing with full SSD ceph cluster, now with full SSD ceph cluster, do i still need to have SSD as journal disk?
[ assumed i do not have PCIe SSD Flash which is better performance than normal SSD disk]
please give some ideas on full ssd ceph cluster ... thank you!
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