Hi,
I'm looking for some pros cons related to RBD stripe/chunk size indicated by image order number. Default is 4MB (order 22), but OpenStack use 8MB (order 23) as default. What if we use smaller size (lower order number), isn't it more chance that image objects is spreaded through OSDs and cached on OSD nodes RAM? What if we use bigger size (higher order number), isn't it more chance that image objects is cached as contiguos blocks and may be have read ahead advantage? Please give your opnion and reason.
Best regards,
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