If you’ve ever run virtual guests on platforms like KVM, Xen, Hyper-V, VMware, or VirtualBox, you probably think of disk attached to the guest as a...
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Things to explore as to why it could be slower on zfs:
recordsize
for filesystem,volblocksize
for volume) you could be seeing write inflation. In the host, look for a lot of reads during a write workload and look to see if the amount of data written by the host is significantly more than that written to the guest.zfs_immediate_write_sz
) but vbox is chopping them up into smaller writes, the data may be written to the zil (zil exists even if log devices don't) and again to its permanent home.Thanks Mike! Very much appreciate your comment. I will go thru those things and see what difference they make, just started with
ashift
, which was indeed set to9
(512B) but should be to13
(8K).Minor typo:
"control it's resources, and more." ->
"control its resources, and more."
Thanks, Jon. Typo fixed.
a brilliant use of virtualisation ! using it to experiment with new file systems WITHOUT messing up your host or native env