[notepad] ceph journal size/ssd speed
Posted on Tue 18 October 2016 in Linux • Tagged with ceph, journal, ssd • 1 min read
ceph journal size (doc)
not for bluestore
osd journal size = {2 * (expected throughput * filestore max sync interval)}
The default for filestore max sync interval is 5 therefore for a 10Gbit network the "perfect" size would be
osd journal size = { 2 * ( 1280 * 5 ) } = 12.5 GB
ceph ssd speed
The optimum …
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